Answer:Covalent bond
Explanation:
Which scenario describes a change in velocity?
A. A skydiver that has reached terminal velocity (a constant speed) while falling.
B. A ride that spins clockwise and then counterclockwise.
C. A car traveling east at 55 km/hr.
D. A plane traveling at 800 mph at cruising altitude.
Answer: B
Explanation:
Velocity is the distance covered in a specific direction per time taken. It is a vector quantity.
When an object reaches terminal velocity, the velocity will be constant.
But a ride that spins clockwise and then counterclockwise. Will experience many changes in velocity. Since velocity is a vector quantity which has both magnitude and direction.
Change in direction is tantamount to change in velocity. Therefore, the scenario that describes a change in velocity is a ride that spins clockwise and then counterclockwise
Answer:
B. A ride that spins clockwise and then counterclockwise.
Explanation:
How can the center of gravity of a rigid body be determined?
The centre of gravity of a rigid body can be find out by suspending the body from a single point and the centre of gravity will lie beneath point if it is symmetric. For asymmetric bodies it is calculated using the average weight per volume times the distance to the volume segment.
What is centre of gravity?Centre of gravity is a point at which its total weight is carried. Gravity is the force acting downward on a body which pulls the body downwards to towards the earth.
Thus at the centre of gravity of a body it experience the net gravitational pull. For a symmetrical rigid body, the centre of gravity can be determined by suspending it at various point and check at which point the object is balanced.
The point on the body just beneath the point at which it is suspended gives the centre of gravity if it balances at that point. For a unsymmetrical body we have to take different volume segments and average weight of the body.
To find more on centre of gravity, refer here:
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Select all the correct answers.
Who are two target audiences for the passage "Gluten Free"?
Gluten Free
people interested in weight loss
doctors who treat people with celiac disease
people who educate others about health decisions
people with gluten sensitivity
people considering making a lifestyle change
Many people consider products made from whole grains,
such as bread and cereal, to be delicious as well as nutritious.
However, gluten allergies are on the rise, and many people can
no longer eat these types of food. Gluten is a type of protein
found in wheat, rye, and barley. This substance can also be
found in sauces, soups, and salad dressings. The widespread
use of gluten can make it difficult to know which foods are safe
for people with gluten allergies. Allergic responses to gluten can
range from stomach aches to acne, and they can even cause
more serious health issues in some individuals. A serious
allergy to gluten is called celiac disease. In the United States,
millions of people suffer from this disorder. Celiac is a digestive
disease that hinders people from properly absorbing nutrients
from food. This disease can lead to various health issues, so
people with these allergies need to be careful about the food
Eating in restaurants can be difficult for people with cellac
disease. However, there are things people can do to ensure
that their food is safe. For example, calling ahead to see if the
restaurant has a gluten-free menu is a start. Even when at the
restaurant, people should not be afraid to ask the server or
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they eat.
2020 Edimentum. All rights reserved.
Question
Select all the correct answers.
Who are two target audiences for the passage "Gluten Free"?
a) people interested in weight loss.
b) doctors who treat people with celiac disease.
c) people who educate others about health decisions.
d) people with gluten sensitivity.
e) people considering making a lifestyle change
Passage: Gluten Free
Many people consider products made from whole grains, such as bread and cereal, to be delicious as well as nutritious. However, gluten allergies are on the rise, and many people can
no longer eat these types of food. Gluten is a type of protein found in wheat, rye, and barley. This substance can also be found in sauces, soups, and salad dressings. The widespread
use of gluten can make it difficult to know which foods are safe for people with gluten allergies. Allergic responses to gluten can range from stomach aches to acne, and they can even cause more serious health issues in some individuals. A serious allergy to gluten is called celiac disease. In the United States, millions of people suffer from this disorder. Celiac is a digestive
disease that hinders people from properly absorbing nutrients from food. This disease can lead to various health issues, so people with these allergies need to be careful about the food.
Eating in restaurants can be difficult for people with celiac disease. However, there are things people can do to ensure that their food is safe. For example, calling ahead to see if the
restaurant has a gluten-free menu is a start. Even when at the restaurant, people should not be afraid to ask the server or they eat.
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Next
2020 Edimentum. All rights reserved.
Answer:
d) people with gluten sensitivity
e) people considering making a lifestyle change
Explanation:
Gluten can be defined as protein that is found is starchy grains such as wheat, rye, barley e.t.c.
One of the main or major functions of gluten is when wheat is used to make dough for bread, pasta, pizza e.t.c , the stretching or elasticity of the dough is due to the presence of gluten in the dough.
Despite these desirable quality, it has been discovered the people are allergic to gluten and these days we have gluten free foods or restaurant that served gluten free foods such as bakes, cakes e.t.c.
One of the allergies of gluten is called Celiac disease. Celiac disease is an allergy that makes it difficult for the human body to be able to digest gluten as well absorbing other food nutrients. This results in symptoms such as flatulence, bloating, diarrhea, vomiting, stomach pain, weight loss e.t.c.
We have been educated in the passage that although it quite difficult for people with Celiac disease to eat at restaurants, but in other to effectively manage the allergy, when you want to eat out, it is best to call the restaurant first to verify if they have gluten free meals or ask the waiter if they have gluten free meals.
The two target audience for the above passage in the question titled "Gluten Free" are:
d) people with gluten sensitivity
e) people considering making a lifestyle change
Answer:
people with gluten sensitivity and people considering making a change in life style
Explanation:
A velocity vs. time graph for an object is shown. A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 5, velocity in meters per second on the y axis, numbered 0 to 5. A line starts at the origin and ends at (5, 5). Which best describes the acceleration of the object? constant and positive constant and negative changing and positive changing and negative
Answer:
Constant and positive constant
Explanation:
The object move with the same velocity at the same interval
A heart beats 10 times in 10 seconds.
How many times does it beat in 1 minute?
Answer:
60
Explanation:
60secs = 1 minute
if you want to show you work further then
10 divided by 10 = 1
so each second is 1 heart beat
so then just 60 divided by 10 equals 6
so then just do 6 times 10 equals 60 beats
a book with a mass of 1.8 kg sits on a bookshelf. if it has a gravitational potential energy of 42 J, how high is the Shelf? The acceleration of the gravity is 9.8 m/s^2. A) 2.1 B) 2.4 C) 1.6 D) 0.9
Answer:
23 m
Explanation:
h = 42 J/1.8 kg = 23 m
The shelf is 2.4 m high.
What is the height of the shelf?
PE = mgh where m is the mass, g is gravity, and h is the height from which the object can potentially fall. We are given enough info here to solve for h. Filling in:
42 = 1.8(9.8)h and
and rounding to 2 sig fig's as we need:
h = 42 / (1.8)(9.8)
h = 2.4 m
The formula for potential energy depends on the force acting on the two objects. For the gravitational force, the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.
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I NEED. HELP PLEASE, THANKS! :) Air is an insulator. However, in winter you might experience a spark when your fingers touch a doorknob. Briefly explain why this happens.
Answer:
This is because of the static electricity which is generated in bodies due to friction. Time to time, the door knob gets touched by many people and the charge on it goes on increasing because of increasing friction. When the charge is increased much, after a considerable time, one may get a spark or a mild shock.
Question 13 of 32
1 Point
For a satellite to orbit Earth at a constant distance, its centrifugal acceleration
must be equal and opposite Earth's gravitational acceleration. If a satellite is
to orbit at a constant distance from Earth at a circular radius of 7,000,000 m,
what is the required velocity of the satellite? (Assume the acceleration due to
Earth's gravity is 8.2 m/s2 at this altitude.)
O A. 8239 m/s
O B. 7576 m/s
C. 6818 m/s
D. 7043 m/s
Answer: B
V = 7576 m/s
Explanation: Given that the
circular radius R = 7,000,000 m,
The acceleration due to Earth's gravity is 8.2 m/s2
Let's use gravitational field strength formula to get the mass of the satellite.
g = Gm/R^2
Where G = 6.674×10^−11m3⋅kg−1⋅s−2
Substitutes all the parameters into the formula
8.2 = (6.674×10^-11 × M)/(7000000)^2
Cross multiply
4.018 × 10^14 = 6.674×10^−11M
Make M the subject of formula
M = 4.018 × 10^14 ÷ 6.674×10^−11
M = 6.02 × 10^24 kg
The Force of attraction experienced by the satellite will be
F = mg
F = 6.02 × 10^24 × 8.2
F = 4.94 × 10^25 N
But centripetal force is
F = MV^2/ R
Where V = velocity of the satellite
Substitute F, M and R into the formula
4.94×10^25 = (6.02×10^24V^2)/ 7 ×10^6
Cross multiply
3.46 × 10^32 = 6.02×10^24V^2
Make V^2 the subject of formula
V^2 = 3.46×10^32 ÷ 6.02×10^24
V^2 = 57403600.2
Find the square root of the value to get V
V = 7576 m/s
The required velocity of the satellite is 7576 m/s approximately
Find the magnitude of the torque that acts on the molecule when it is immersed in a uniform electric field of 6.19×105 N/C with its electric dipole vector at an angle of 69.9∘ from the direction of the field.
Answer:
[tex]\tau=5.81\times 10^5p\ N-m[/tex]
Explanation:
We have,
Electric field, [tex]E=6.19\times 10^5\ N/C[/tex]
The electric dipole vector at an angle of 69.9 degrees from the direction of the field.
The torque acting on a molecule is given by :
[tex]\tau=p\times E\\\\\tau=pE\sin\theta[/tex]
p is electric dipole moment
[tex]\tau=p\times 6.19\times 10^{5}\times \sin (69.9)\\\\\tau=5.81\times 10^5p\ N-m[/tex]
So, the magnitude of the torque acting on the molecule is [tex]5.81\times 10^5p\ N-m[/tex].
(b) Figure 3.32 shows the orbit of a planet around the Sun. Compare the linear speed of the planet at positions X, Y and Z.
(please help me QAQ)
At Z ... slowest speed
At Y ... fastest speed
At X ... medium speed
Wherever it is in its orbit, the line from the planet to the Sun smears over the same amount of area every second.
That's Kepler's second law of planetary motion.
The reason this happens is: That's how gravity works. (A better explanation is available, but first you have to be able to twirl calculus and solid geometry in the air on long sticks.)
Can you please tell me what type of motion does these graphs represent(for example uniformly accelerated motion etc.) This is GRAPHICAL REPRESENTATION OF MOTION of grade 9 ...I have test tomorrow..Kindly clear my doubt as fast as you can..plsssssssss
Explanation:
Graph 1 is linear motion because it has constant velocity for some time.
Graph 2 is , if we see path over path we can see positif uniformy accelerated motion when the graph sketch to upper right and uniformly deaccelerated motion when goes down right.
But for all, the2nd graph motion looks random motion
A 72-kg skydiver is falling from 10000 feet. At an instant during the fall, the skydiver
encounters an air resistance force of 540 Newtons. The acceleration of the skydiver at
this instant is
m/s2
Answer:
Approximately [tex]2.31\; \rm m \cdot s^{-2}[/tex] (assuming that the acceleration due to gravity is[tex]g = 9.81\; \rm m \cdot s^{-2}[/tex].)
Explanation:
Assuming that [tex]g = 9.81\; \rm m \cdot s^{-2}[/tex] the weight on this 72-kg skydiver would be [tex]W = m \cdot g = 72 \; \rm kg \times 9.81\; \rm m \cdot s^{-2} = 706.32\; \rm N[/tex] (points downwards.)
Air resistance is supposed to act in the opposite direction of the motion. Since this skydiver is moving downwards, the air resistance on the skydiver would point upwards.
Therefore, the net force on this skydiver should be the difference between the weight and the air resistance on the skydiver:
[tex]\begin{aligned}F(\text{net force}) &= W - F(\text{air resistance})\\ &= 706.32\; \rm N - 540\; \rm N =166.32\; \rm N \end{aligned}[/tex].
Apply Newton's Second Law of motion to find the acceleration of this skydiver:
[tex]\begin{aligned}a &= \frac{F(\text{net force})}{m} \\ &= \frac{166.32\; \rm N}{72\; \rm kg} = 2.31\; \rm m \cdot s^{-2} \end{aligned}[/tex].
A DC-9 aircraft leaves an airport from a runway whose bearing is N4343degrees°E. After flying for one half 1 2 mile, the pilot requests permission to turn 90degrees° and head toward the southeast. The permission is granted. After the airplane goes 1 mile in this direction, what bearing should the control tower use to locate the aircraft? What is the bearing that the control tower should use to locate the aircraft? ▼ S N nothingdegrees° ▼ E W (Round to the nearest tenth as needed.)
Answer:
103.4° or S76.6°E
Explanation:
The direction N43°E is perpendicular to the direction south-east when the plane turn 90° and heads in the south-east direction.
Since the distance 1/2 mile N43°E is perpendicular to the distance 1 mile south-east, we have a right angled triangle.
So, the angle θ between the aircraft's new position and old position is gotten from tanθ = 1 ÷ 1/2 = 2
θ = tan⁻¹(2) = 63.43°
So, the total angle from North to its new position is 40° + 63.43° = 103.43°
Since we need the south-east bearing, the angle from south is 180° - 103.43° = 76.57° ≅ 76.6°
So, our bearing is 103.4° or S76.6°E
What are the properties of solid,liquid and gas?
Solid- 4 properties
Liquid-3 properties
Gas-3 properties
Answer:
Hey mate!!
Properties of Solid:They have fixed shape.They have fixed volume.They do not flow.They cannot be compressed because their molecules are closely packed.They are mostly hard.Properties of Liquid:They do not have fixed shape but can take the shape of their container.They cannot be compressed.They flow from one place to another as their molecules are loosely packed.They have fixed volume.Properties of Gas:They do not have fixed volume.They can flow very easily.They can be compressed easily.They do not have a fixed shape as the position of their molecules are not fixed.Hope this helps...
Good luck on your assignment...
I NEED HELP PLEASE, THANKS! :)
A 20.0 cm tall object is placed 50.0 cm in front of a convex mirror with a radius of curvature of 34.0 cm. Where will the image be located, and how tall will it be? Please show all work.
Answer:
i = -12.7 cm; h = 5.07 cm
Explanation:
1. Find the focal length
The focal length of a concave spherical mirror is half of its radius of curvature.
f = ½r = ½ × 34.0 cm = 17.0 cm
2. Find the image distance
A convex mirror produces a virtual image behind the mirror, so the image distance is negative.
[tex]\begin{array}{rcl}\dfrac{1}{o} + \dfrac{1 }{i} & = & \dfrac{1}{f}\\\\\dfrac{1}{50.0} + \dfrac{1 }{i} & = & \dfrac{1}{-17.0}\\\\\dfrac{1}{i} & = & \dfrac{1}{-17.0} - \dfrac{1}{50.0}\\\\& = & \dfrac{50.0 - (-17.0)}{500\times(-17.0)}\\\\& = & \dfrac{67.0}{-850}\\\\i & = & \dfrac{-850}{67.0}\\\\& = & \textbf{-12.7 cm}\\\end{array}[/tex]
3. Find the image size
[tex]\begin{array}{rcl}\\\\\dfrac{h_{\text{i}}}{ h_{\text{o}}} & = & -\dfrac{i}{o} \\\\\dfrac{h_{\text{i}}}{ 20.0} & = & -\dfrac{-12.7}{50.0} \\\\h_{\text{i}} & = & 20.0 \times \dfrac{12.7}{50.0}\\\\& = & \textbf{5.07 cm}\\\end{array}[/tex]
Which refers to a measure of how acidic or basic a solution is? a]pH b]solubility c]reactiveness d]hardness
Answer:
Option(a) i.e" pH" is the correct answer to the given question .
Explanation:
The main objective of pH value is to determining whether the solution is the acidic or the basic solution.The pH is determining the solution whether it is basic or acidic with the help of there pH value .The range of the pH value is from 0 to 14 with the following parameter it determines whether the solution is basic ,acidic or the neutral solution .
If pH value is 7 then it is neutral solution .If pH value is greater then 7 then the solution is then it is basic solution .If the pH value is less then 7 then the solution is the Acidic solution .All the other option are not determining that whether the solution is acidic or the basic solution that's why these are incorrect option .
Answer:
the answer is A pH
got it right 2020
Explanation:
A ball is falling at terminal velocity. Terminal velocity occurs when the ball is in equilibrium and the forces are balanced. Which free body diagram shows the ball falling at terminal velocity? A free body diagram with one force pointing downward labeled F Subscript g Baseline 20 N. A free body diagram with 2 forces: the first pointing downward labeled F Subscript g Baseline 20 N and the second pointing upward labeled F Subscript air Baseline 20 N. A free body diagram with 2 forces. The first pointing downward labeled F Subscript g Baseline 20 N and the second pointing upward labeled F Subscript air Baseline 5 N. A free body diagram with 2 forces: the first pointing downward labeled F Subscript g Baseline 20 N and the second pointing upward labeled F Subscript air Baseline 30 N.
Answer:
A free body diagram with 2 forces: the first pointing downward labeled F Subscript g Baseline 20 N and the second pointing upward labeled F Subscript air Baseline 20 N.
Explanation:
This is because at terminal velocity, the ball stops accelerating and the net force on the ball is zero. For the net force to be zero, equal and opposite forces must act on the ball, so that their resultant force is zero. That is F₁ + F₂ = 0 ⇒ F₁ = -F₂
Since F₁ = 20 N, then F₂ = -F₁ = -20 N
So, if F₁ points upwards since it is positive, then F₂ points downwards since it is negative.
So, a free body diagram with 2 forces: the first pointing downward labeled F Subscript g Baseline 20 N and the second pointing upward labeled F Subscript air Baseline 20 N best describes the ball falling at terminal velocity.
Answer:
b
Explanation:
A boy rides motorbike with velocity of 20 m/s He accelerates his motorbike
to a velocity of 30 m/s for 5 second. Calculate the acceleration produced in the
motorbike.
[Ams 2ms
Answer:
2m/s^2
Explanation:
Initial velocity(u) = 20m/s
Final velocity(v) = 30m/s
Time(t) = 5s
Using Acceleration(a) = change in velocity/time
a = v-u/t
a = 30-20/5
a = 10ms/5s
a = 2m/s^2
When farm animals eat the grass on land until there is almost no ground cover, it is called ______.
Answer:
When farm animals eat the grass on land until there is almost no ground cover, it is called overgrazing
Answer:
Its called over grazing
Explanation:
Q1:A large tank is filled with water. The pressure on the base of the fish tank is 4000N/m². The base of the tank is a rectangle measuring 2.0m by 4.5m. Calculate the force on the base caused by the base of the water.
Answer:
F = 36 kN
Explanation:
It is given that,
The pressure on the base of the fish tank is 4000N/m².
The base of the tank is a rectangle measuring 2.0m by 4.5m.
Area of the base of the tank is 9 m²
We need to find the force on the base caused by the base of the water. Pressure on the base of the tank is given by the force acting per unit area such that,
[tex]P=\dfrac{F}{A}\\\\F=P\times A\\\\F=4000\times 9\\\\F=36000\ N\\\\F=36\ kN[/tex]
So, the force of 36 kN is acting on the base by the base of water.
Calculate the force exerted by a machine that does 4800 J of work over a distance of 22.5 m?
Answer:
About 213.33 N
Explanation:
Force can be found using the following formula:
F= w/d
where w is work in Joules (J) and d is distance in meters (m).
We know that the machine does 4800 Joules of work over a distance of 22.5 meters. Therefore,
w=4800 J
d=22.5 m
Substitute these values into the formula.
F= 4800 J/ 22.5 m
Divide 4800 by 22.5
F= 213.333333 J/m
Let's round to the nearest hundredth. The 3 in the thousandth place indicates the 3 in the hundredth place should stay.
F= 213.33 J/m
1 J/m is equal to 1 Newton, or N.
F= 213.33 N
The force exerted by the machine is about 213.33 Newtons
A stone is dropped from a tower of height 3600cm.Find the velocity by which it strike the ground.Find the time taken to reach the ground.
Answer:
1. 26.56m/s.
2. 2.71 secs.
Explanation:
The following data were obtained from the question:
Height (h) = 3600cm
Velocity (v) =..?
Time (t) =..?
Next, we shall convert the height, 36000cm to metre (m). This is illustrated below:
100cm = 1m
Therefore, 3600cm = 3600/100 = 36 m
Therefore, the height is 36m.
1. Determination of the velocity with which the stone struck the ground. This is illustrated below:
Acceleration due to gravity (g) = 9.8m/s²
Height (h) = 36m
Velocity (v) =.?
v² = 2gh
v² = 2 x 9.8 x 36
v² = 705.6
Take the square root of both side.
v = √705.6
v = 26.56m/s
Therefore, the velocity with which the stone struck the ground is 26.56m/s.
2. Determination of the time taken for the stone to reach the ground.
Height (h) = 36m
Acceleration due to gravity (g) = 9.8m/s²
Time (t) =.?
t = √(2h/g)
t = √(2 x 36/ 9.8)
t = √(72/9.8)
t = 2.71 secs
Therefore, the time taken for the stone to reach the ground is 2.71 secs
Resistance and resistivity are related by a: 1.factor that is dependent on the length of the material 2.factor that is dependent on the area of the material 3.proportionality constant dependent on the identity of the material 4.proportionality constant dependent on the source of the material
Answer:
1. factor that is dependent on the length of the material.
2. factor that is dependent on the area of the material
Explanation:
Resistance R is directly proportional to its length L of an object and it is inversely proportional to the crossectional area of that object.
Mathematically, this is represented as:
a) Resistance R is directly proportional to its length L of an object
R ∝ L ......... Equation 1
b) Resistance R is inversely proportional to the crossectional area (A) of an object
R ∝ 1/A ............ Equation 2
Combining the two equations together, we have:
Resistance R is directly proportional to its length L of an object
R ∝ L/A .......... Equation 3
Resistivity of a material is the natural or inherent or intrinsic property that a material has. The Resistivity of a material is not dependent on the length or crossectional area of such material. It is only temperature dependent.
The resistance of a material is also dependent on the resistivity of the material. This means the resistance of a material is directly proportional to the resistivity of the material.
R ∝ ρ........Equation 4
Combining Equation 4 and 3 together, we have:
R = ρL/A
Where:
R = Resistance
ρ = Resistivity
L = Length of the material
A = Crossectional area of the material
Resistance and resistivity are related by a factor that is dependent on the length of the material a factor that is dependent on the area of the material
If you only 24 hours too live, how would you spend it...
Answer:
I would spend the 24 hours with joy and fun ...
Like I would go for a walk of 30 minutes with my puppy . And than I will spend my 2 hours with my friends on going to shopping . And than 2 hrs just helping the poors .And than just gonna waste my 30 minutes with my younger sister . And than 2 hrs with my my grandpa and with my grandmom . And than just going to the cinema to watch a movie with my parents for 3 hrs and than just . Amd than just going to have a good sleep for 14 hrs .
Explanation:
Hope it works out !!!
6 points + Brainliest asap!
If you double the amplitude of a box on a spring, how would that affect the acceleration at maximum displacement?
The acceleration would double.
The acceleration would remain the same.
The acceleration would triple.
The acceleration would be cut in 1/2.
Answer:
The acceleration would double
Explanation:
Assuming the same box and spring, the maximum acceleration is proportional to amplitude. When the amplitude doubles, the acceleration would double.
__
A spring is generally considered to have a linear force vs. distance characteristic. Hence, doubling the distance doubles the force. The acceleration is proportional to the force.
Earth's atmosphere is made up of mostly nitrogen (78%) and oxygen (21%); however, there are other gases in smaller amounts, like argon, carbon dioxide, neon, helium, hydrogen, and more. If there was an increase of carbon dioxide in the atmosphere, how would this affect temperature? A) The temperature would increase globally. B) The temperature would decrease globally. C) Temperature doesn't relate to the composition of the atmosphere; it has to do with the sun's rays. D) The temperature would not be affected since carbon dioxide is only one component in the atmosphere.
Answer:
the temperature would increase globally because carbon dioxde contributes to global warming increase the temperature of the earth
Explanation:
i hope this will help you
If there is an increase of carbon dioxide in the atmosphere, this affects temperature the temperature would increase globally. The correct option is B.
What is global warming?The term “global warming” refers to a steady increase in the average temperature of the Earth's atmosphere and oceans, a phenomenon that is thought to be irreversibly altering the Earth's climate.
Our poles' waters are melting as a result of global warming. When our polar ice caps melt the majority of the way, many coastal communities will flood. Extreme weather, such as greater hurricanes, larger thunderstorms, and wider areas affected by other natural catastrophes, will also occur.
The temperature would decrease globally because carbon dioxide contributes to global warming, increasing the temperature of the earth.
Therefore, the correct option is B) The temperature would decrease globally.
To learn more about global warming, refer to the link:
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Iron filings scattered around a magnet will be most strongly drawn toward the
A north pole
B magnetic poles
C center of the magnet
D south pole
Answer:
B.
Explanation:
The magnetic force of a magnet is the strongest at the poles.
what are concave mirrors used in
Answer:
Uses Of Concave Mirror:
Shaving mirrors.
Head mirrors.
Ophthalmoscope.
Astronomical telescopes.
Headlights.
Solar furnaces
I NEED HELP PLEASE, THANKS! :)
Tom’s father is 48 years old. He is not able to see nearby objects clearly.
-What may be the reason for his vision problem?
-Where are images formed in this type of defected vision?
-How is this defect corrected?
Answer:
Explanation:
1) Hypermetropia (better known as Farsighted- this is why nearby objects seem blurry for him)
2) In such instances, image are typically formed farther from the near point
3) Such defects are quite common so there are common procedures such as using convex lens which can restore the sight to normal.
A moving particle encounters an external electric field that decreases its kinetic energy from 9970 eV to 6340 eV as the particle moves from position A to position B The electric potential at A is 55.0 V and that at B is 19.0 V Determine the charge of the particle Include the algebraic sign or with your answer
Answer:
q = -1.61x10⁻¹⁷ C
Explanation:
The charge of the particle can be found using the definition of the work done by electric force:
[tex] W = -q\Delta V [/tex] (1)
Where:
q: is the charge
ΔV: is the difference in electric potential
The work is also equal to:
[tex] W = E_{p_{A}} - E_{p_{B}} [/tex] (2)
Where:
[tex]E_{p_{A}}[/tex] and [tex]E_{p_{B}}[/tex] are the electric potential energy of the points A and B, respectively.
Now, by conservation of energy we have:
[tex] K_{A} + E_{p_{A}} = K_{B} + E_{p_{B}} [/tex] (3)
Where:
[tex]K_{A}[/tex] and [tex]K_{B}[/tex] are the kinetic energy of the points A and B, respectively.
Rearranging equation (3):
[tex] K_{B} - K_{A} = E_{p_{A}} - E_{p_{B}} [/tex]
[tex] K_{B} - K_{A} = W [/tex]
[tex] K_{B} - K_{A} = -q\Delta V [/tex]
Solving the above equation for q:
[tex] q = -\frac{K_{B} - K_{A}}{V_{B} - V_{A}} = -\frac{6340 eV - 9970 eV}{19.0 V - 55.0 V} = -100.83 e \cdot \frac{1.6 \cdot 10^{-19} C}{1 e} = -1.61 \cdot 10^{-17} C [/tex]
Therefore, the charge of the particle is -1.61x10⁻¹⁷ C.
I hope it helps you!
