Answer:
Energy is defined as the ability to do work. Forms of energy could be kinetic energy or potential energy. Thermal or heat energy can originate from a hot object such as the sun. Energy is used to produce work. Electrical energy for lighting purposes and heating in homes and factories.
Explanation:
Energy is defined as the ability to do work and can be in various forms such as kinetic energy, potential energy, thermal, chemical, electrical energy etc.
Energy origination depends on the type of energy form in discussion. Thermal or heat energy can originate from a hot object such as the sun or an iron box, chemical energy originates from the interaction of atoms and molecules and electrical energy can be initiated by movements of electrons.
Energy is used to produce work. Different forms of energy can do different tasks such as;
Heat energy for heating water
Electrical energy for lighting purposes
Geothermal energy for producing heat and electricity
Nuclear energy for production of nuclear power
Chemical energy for facilitating chemical reactions
Both sound waves and light waves undergo the phenomenon of refraction when they travel form air to water. How is refraction of sound waves different from the refraction of light waves?
Answer:
Glass is denser than air, so a light ray passing from air into glass slows down. If the ray meets the boundary at an angle to the normal , it bends towards the normal. The reverse is also true. A light ray speeds up as it passes from glass into air, and bends away from the normal by the same angle.
Explanation:
A car travels for 10s at a steady speed of 20m/s along a straight road. The traffic lights ahead change to red, and the car slows down with a constant deceleration, so that it stops after an additional 8 seconds.
Use your graph to deduce how far the car has travelled during the 18 seconds described.
Answer:
280 meters
Explanation:
You should get the speed
And you should use the graph….
To get the distance using the graph the rule is …(area under graph) which is equal to area of triangle + area of the rectangle
Area of triangle = 0.5 x length x width
Area of rectangle = Length x width
(0.5 x 8 x 20 ) + ( 10 x 20 ) = 280 meters
Wish this helps
If the speed of an object increases, the kinetic energy will ______________ because _____________________________________.
Timed! I would really appreciate some help! thank you!
Andy runs for 30 minutes at a speed of 10km/h. How far did he run? (Hint: remember to convert the minutes to hours before calculating distance.) *
3km
5km
150km
Answer:
x = 5[km]
Explanation:
We must convert the time from minutes to hours.
[tex]t=30[min]*\frac{1h}{60min}= 0.5[h]\\[/tex]
We know that speed is defined as the relationship between space and time.
[tex]v=x/t[/tex]
where:
x = space [m]
t = time = 0.5 [h]
v = velocity [m/s]
Now replacing:
[tex]x = 10[\frac{km}{h} ]*0.5[h]\\x=5[km][/tex]
. Justin completes an experiment length of time a paper airplane stays in flight. He records his results in a
data table. These results are known as _______results.
A. written
B. tabled
C. qualitative
D. quantitative
Explanation:
Qualitative is to observe and note a quality about something - like the paper airplanes are made out of "white" paper. White is a qualitative property.
Quantitative is to observe and measure a value - like the time of flight of a paper airplane.
Somebody please help
Answer:
a = 0.1067 [m/s²]
Explanation:
In order to solve this problem, we must first draw a free body diagram with the forces acting on it.
a)
In the attached image we can find the free body diagram.
b)
The net force can be found by performing a sum of forces on the X-axis, these forces are seen in the free body diagram.
∑Fx = Fr
where:
Fr = resultant force [N] (units of Newtons)
[tex]F_{r}=275+275-310\\F_{r}=240[N][/tex]
c)
Acceleration can be found by means of Newton's second law, which tells us that the sum of the forces in a body or the resulting force is equal to the product of mass by acceleration.
∑F = m*a
where:
m = mass = 2250 [kg]
a = acceleration [m/s²]
[tex]240=2250*a\\a=0.1067[m/s^{2} ][/tex]
Direction is the length of a route between two points
The SI unit for distance is the meter (m). Direction is just as important as distance in describing motion. A vector is a quantity that has both size and direction
Hope this helps have a great day!!
A sound wave traveling through dry air has a frequency of 16 Hz, a wavelength of 22 m, and a speed of 350 m/s. When the sound wave passes through a cloud of nitrous oxide, its wavelength changes to 16 m, while its frequency remains the same. What is its new speed? (The equation for the speed of a wave is v= f x 1.)
A. 350 m/s
B. 16 m/s
C. 5,600 m/s
D. 256 m/s
It's D
Answer:
D. 256 m/s
Explanation:
[tex]f[/tex] = Frequency of the wave = [tex]16\ \text{Hz}[/tex]
[tex]\lambda[/tex] = Wavelength = [tex]16\ \text{m}[/tex]
Speed of a wave is given by
[tex]v=f\lambda[/tex]
[tex]\Rightarrow v=16\times 16[/tex]
[tex]\Rightarrow v=256\ \text{m/s}[/tex]
The speed of the wave as it passes through the cloud of nitrous oxide is [tex]256\ \text{m/s}[/tex].
Answer:
D. 256 m/s
Explanation:
d. d as in dog
The total mass of the train and its passengers is 750000kg. The train is traveling at a speed of 84m/s. The driver applies the brakes and the train takes 80s to slow down to a speed of 42m/s.
Answer:
|F| = 393750 N
Explanation:
Given that,
Total mass of the train, m = 750000 kg
Initial speed, u = 84 m/s
Final speed, v = 42 m/s
Time, t = 80 s
We need to find the net force acting on the train. The formula for force is given by :
F = ma
[tex]F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{750000\times (42-84)}{80}\\\\F=-393750\ N[/tex]
So, the magnitude of net force is 393750 N.
mention effects of heat
Answer:
See explanation
Explanation:
Heat is defined as a form of energy due to temperature difference. Heat is also a measure of the total internal energy of a body.
Heat has the following effects;
1) Heat causes change of state of a body
2) Heat changes the temperature of a body
3) Heat causes expansion of a body
4) Heat may alter certain physical properties of a body such as electrical conductivity, density etc
5) Heat causes a change in the pressure and volume of a body
6) Heat may lead to the emission of electrons from metals(thermionic emission)
what do you know about the universe
Answer:
all existing matter and space
Explanation:
Answer:
The universe diameter is unknown
Explanation:
The amount of air resistance acting on an object depends on the objects
Answer:
Shape of the object
Explanation:
This depends on the shape of the object. For a spherical object, a unitless value of 0.47 is typical. The magnitude of the velocity squared. The faster you go, the greater the air resistance force
please help
1. Describe the difference between an "object" and a "system"
2.Give an example of a system with at least three objects.
3. What is meant by "the energy of the system?"
4. Give an example of energy moving from one object in a system to another object in the system.
Answer:
A class is a blueprint from which you can create the instance, i.e., objects. An object is the instance of the class, which helps programmers to use variables and methods from inside the class. A class is used to bind data as well as methods together as a single unit. Object acts like a variable of the class.include transport systems; solar systems; telephone systems; the Dewey Decimal System; weapons systems; ecological systems; space systems; etc. Indeed, it seems there is almost no end to the use of the word “system” in today's society.One of the thermodynamic properties of a system is its internal energy, E, which is the sum of the kinetic and potential energies of the particles that form the system. The internal energy of a system can be understood by examining the simplest possible system: an ideal gas.A swinging pirate ship ride at a theme park. Kinetic energy is transferred into gravitational potential energy.A boat being accelerated by the force of the engine. The boat pushes through the water as chemical energy is transferred into kinetic energy.
Bringing water to the boil in an electric kettle.
Help with 7 - 9 please!
Answer:
Try lookin those questions up on Brainly
Explanation:
Please please help you will get the brainlest
Answer:
1. 40/20=2meters per second
2. 0
3.240/20=12 meters per second
Does Santa Maria have a globe effect
Answer:
I don't think so
Explanation:
Answer:
yes
Explanation:
The independent variable in Experiment III was the A ) treatments used to prevent corrosion . B ) changes made to the shape of the nails. C) time the treated nails were left undisturbed . D) amount of corrosion , rated on a scale of 0 to 5.
Answer: the answer is A
Explanation: The independent or manipulated variable in Experiment III was the treatments used to prevent corrosion. The dependent or responding variable was the amount of corrosion, rated on a scale of 0 to 5.
A hummingbird has a mass of about 1.7 g. Suppose a hummingbird does 0.15 J of work against gravity, so that it ascends straight up with a net acceleration of 1.2 m/s2. How far up does it move?
Answer:
2 m long, how wide is it? SOLUTION. Given: F = 60.0 N. W = 2.05 × 105. J x = 9.60 × 102 m. Unknown: d = ? ... moved? 3. A hummingbird has a mass of about 1.7 g. Suppose a hummingbird does 0.15 J of work against gravity, so that it ascends straight up with a net acceleration of 1.2 m/s. 2 . How far up does it move? 4.
Explanation: hope this helps plz help me with my question
The planet Venus has a mass of 4.87 x 10^24 kg and a radius of 6.05 x 10^6 km. What is
the magnitude of the gravitational force that an 81-kg person would experience while
standing on the surface of Venus?
(A) 179 N
(B) 719 N
(C) 259 N
(D) 7.19 x 10^8N
(E) 4.19 x 10^9N
Answer:
The gravitational force that an 81-kg person would experience while standing on the surface of Venus is approximately;
(A) 719 N
Explanation:
The question relates to gravity calculation for which we use the Newton's gravitational law which is presented as follows;
[tex]F=G \cdot \dfrac{M \cdot m}{r^{2}}[/tex]
Where;
G = The universal gravitational constant = 6.67408 × 10⁻¹¹ m³kg⁻¹s⁻²
F = The gravitational force between the two masses, "M" and "m"
r = The distance between the centers of the two masses
M = The mass of one body interacting in the gravitational force
m = The mass of the other body interacting in the gravitational force
The given parameters are;
The mass of Venus, M = 4.87 × 10²⁴ kg
The radius of the planet Venus, r (is corrected) = 6.05 × 10³ km = 6.05 × 10⁶ km
The mass of the person standing on the surface of Venus, m = 81-kg
Therefore, by plugging in the values, we get;
[tex]F=6.67408 \times 10^{-11} \cdot \dfrac{4.87 \times 10^{24} \times 81}{(6.05 \times 10^6)^{2}} = 719.2744587391571613960795027662 \ N[/tex]
From Newton's third law of motion, the gravitational force that the 81-kg person experiences while standing on the surface of Venus = F ≈ 719 N.
PLEASE ANYONE CAN HELP ME !E.x/A block of metal has a volume of 0.09 m3
Calculate the buoyant force when it's Completely
immersed in brine ? density = 1200 kg/m3
Answer:
B = 1058.4 N
Explanation:
Given that,
The volume of a metal block, V = 0.09 m³
The density of fluid, d = 1200 kg/m³
We need to find the buoyant force when it's Completely immersed in brine. The formula for the buoyant force is given by :
[tex]B=\rho gV[/tex]
g is acceleration due to gravity
[tex]B=1200\times 9.8\times 0.09\\\\B=1058.4\ N[/tex]
So, the required buoyant force is 1058.4 N.
Three rocks with masses of 1 kg, 5 kg, and 10 kg fall from the same height.
Which of the following describes the inertia of these rocks?
What is the weight of a 82.1 kg object on Jupiter, where the acceleration due to gravity is 24.5 m/s2?
Question 25
2.5 pts
Which of the following statements describes a difference
between a chemical change and a physical change in a
substance?
Tim
Attei
231
o The result of a chemical change is a different
composition; in a physical change, the composition
remains the same.
o A physical change occurs only in elements: a
chemical change occurs only in compounds.
O A chemical change occurs only in elements; a
physical change occurs only in compounds.
The result of a physical change is a different
Answer:
o The result of a chemical change is a different composition; in a physical change, the composition remains the same.
Explanation:
In a chemical change, new kinds of matter are produced although the atoms are the same.
For physical changes, no new kinds of matter formed. Only the state of substances changes.
Most chemical changes are usually irreversible Physical changes are reversible in most parts. Changes in state and form are salient characteristics of physical changes. When new products are formed from the reactants, it is an indicator of a chemical change.Let's talk skateboard velocity how much mean when you get my going down a 3 x 3" metal ramp. No posers are allowed to answer this question
Answer:
quarte embri Oslo
Explanation:
Answer:
i think it is 9
Explanation:
kg. m
A tennis player hits a ball and gives it a change in momentum of 3.3 over 5.0 ms.
S
What is the magnitude of the net force on the tennis ball?
Answer:660
Explanation:
I NEED AN ANSWER!
A sled going down a hill covered in snow eventually comes to
a stop. Explain why this happens in terms of energy. Use
the terms potential energy, kinetic energy , and friction.
Answer:
Before sled starts to move it has a potential energy due to the elevation...and then that potential energy converted to kinetic energy due to presence of a velocity...the sled will continue to move if their is no resesive force...but however friction force is presence that cause the sled to stop....
a cruise ship travels directly toward the dock with a velocity of 15 m/s relative to the water. A passenger walks 3 m/s in the same direction as shown in the picture below
Answer:
Explanation:
i believe a if not c
manita carries a box of mass 40kg. What is the wieght of the box?
Answer:
40kg
Explanation:
that the answer
ANSWER ASAP GIVING BRAINLIEST FIVE STARS AND A HEART!
Describe why a sound seems to increase in pitch when its source moves toward a listener.
Fill in the blank: A _____________ circuit has multiple paths for a charge to follow to and from the power source.
Answer:
A parallel circuit
Explanation:
there you go
hope that helps
thanx
Answer:
parallel circuit
Explanation:
