4. What is the acceleration of a car traveling at 65 mph that keeps a constant speed over
75 seconds?
a. 0.0 mphis
b. 65 m/s2
c. 75 mphis
d. 75 m/s2
e. Not enough data is given.
Answer:
a.
Explanation:
Remeber speed and velocity are the same concept, it just speed is scalar, meaning it doesn't have a direction nor it negative.
So technically thr car had a constant speed over 75 seconds.
If thr car has a constant speed, the car isn't speeding up or slowing down so it has accleration of 0 so the answer is a.
Directions: Read each question carefully and answer
1. When the energy of a substance decreases, the motion of its molecules change. A substance has these 4 characteristics:
1. Molecules moving freely start to slow down
2. Collisions between molecules are less energetic
3. Intermolecular forces have more effect as molecules become closer
4. Molecules start vibrating in fixed positions
A man is holding a 5kg weight ball. What is the weight of the ball?
Simple net force problems ( always draw FBd/free body diagram and utilize guess)
(Guess-given,unknown,equations,set-up, and solve)
Answer:
1000kg
Explanation:
I'm smart I am a genius I know everything so I know it is 1000kg
There are ______ main fitness zones.
A.
four
B.
three
C.
seven
D.
five
Answer:
option D
Explanation:
five
hope it helps you and Mark me down as brainlist
In this exercise we have to know the fitness zones and know their quantity, so we have five fitness zones.
What does fitness zone mean?Fitness zones are 5 scale divisions that determine the effort range, the first being the lightest and the fifth the most intense. In a nutshell, they help determine when the effort is light, moderate, or strong.
Very light: This is the very low intensity zone. Training at this intensity will boost your recovery and get you ready to train in the higher heart rate zones.Light: Exercising in heart rate zone 2 feels light and you should be able to go on for a long time at this intensity.Moderate: Working out in heart rate zone 3 is especially effective for improving the efficiency of blood circulation in the heart and skeletal muscles. Hard: Heart rate zone 4 is where the going gets tough. You’ll be breathing hard and working aerobically.Maximum: Heart rate zone 5 is your maximal effort. Your heart and your blood and respiratory system will be working at their maximal capacity.See more about fitness zone at brainly.com/question/4954992
Explain Speed ? ...
kindly don't copy from web ...
Explain answer in ur own words...
Answer:
The distance covered by an object per unit time is known as speed.
Answer:
Speed is known as the distance covered per unit time.It is a scalar quantity. Unit of speed is m/s.
It has only magnitude, direction is not specified.
An object is said to be in uniform speed or motion if it covers equal distance in equal intervals of time.
The formula to find speed is
[tex] \sf \frac{distance}{time} \\ [/tex]
Suppose we take an example that distance is 100km and time is 5 hour
So speed will be
[tex] \frac{ { \cancel{100}} \: \: ^{20} }{ \cancel5} \\ [/tex]
speed is 20 km/ hr.
Know more:If distance is in metre and time is in hour. Then you'll follow the formula and simplify. After simplifying, you'll multiply it by 18/5If it's given in km and other in m then after simplifying multiply it by 5/18 to get speed in km/hr.Formula to find distance = speed×timeFormula to find time=Distance/ speed[tex]\Large\textsf{Hope \: It \: Helped}[/tex]
Please help me !! look at the image .
Answer:
B, D, A, C
Have a great day!
A box with a weight of 100 N rests on a horizontal floor. The coefficient of static friction is = 0,40 and the coefficient of kinetic friction = 0,30. Determine the frictional force acting on the box if a horizontal force is applied with a magnitude of: a) O N; b) 20 N; C) 40 N; d) 60 N
what is a normal force?
a car has a velocity of 87 km/hr to the east. What is its displacement if it travels at this velocity for 30 minutes?
Answer:
displacement = 43.5 km
Explanation:
displacement = velocity * time taken
Here speed is 87 km/hr, which is given in km per hour
So we need to change the given time to hours:
60 minutes = 1 hours
30 minutes = 0.5 hours
Then using the formula lets find displacement:
displacement = velocity * time taken
displacement = 87 km/hr * 0.5
displacement = 43.5 km
During a wheelchair race, the angular motion of the athlete's arms and the wheels of the chair propel the athlete and chair along the track. What type of motion best describes the trajectory of the athlete and chair along the track
Given what we know, the type of motion that best describes the trajectory of the athlete and chair along the track is linear motion.
What is linear motion?Linear motion is a type of motion that describes the movement of objects in a straight line. Depending on the exact design of the track this can be subcategorized as rectilinear motion or curvilinear motion. The latter being the case if the track contains a curve.
Therefore, given the motion produced by the athlete and the wheelchair, we can describe it as linear motion, and subcategorize it depending on the exact description of the track.
To learn more about motion visit:
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Answer:
Is a linear motions
Explanation:
7. Which quantity is the transfer of energy?
force
motion
work
Answer:
work!!!!Explanation:
Work is a scalar quantity, so it has only magnitude and no direction. Work transfers energy from one place to another, or one form to another. The SI unit of work is the joule (J), the same unit as for energy.
In this exercise we have to know the definition of energy to understand what is transferred to a body, like this:
Work
What is energy?Despite being used in many different contexts, the scientific use of the word energy has a well-defined and precise meaning: Innate potential to perform work or perform an action. Anything that is working, moving another object, or heating it up, for example, is expending (transferring) energy.
With this definition we can say that the only alternative that responds to this is work.
See more about energy at brainly.com/question/1932868
____________________ (is/are) one type of tectonic event captured in geologic maps.
Mountain building
Gravity shifts
Mammal evolution
Seismic activity
Answer:
Seismic activityis/are) one type of tectonic event captured in geologic maps.
In which collision scenario is the difference in total momentum before and total momentum after the collision the greatest?
nee answer ASAP
Answer:
The law states that when two objects collide in a closed system, the total momentum of the two objects before the collision is the same as the total momentum of the two objects after the collision. The momentum of each object may change, but the total momentum must remain the same.
Explanation:
the gravitational potential energy of a ball is 20 J when the ball is dropped. If mechanical energy is conserved, which energies are possible for the ball as it falls
Taking into account the definition of kinetic, potencial and mechanical energy, the potential and kinetic energy are possible for the ball as it falls.
Kinetic energyKinetic energy is a form of energy. It is defined as the energy associated with bodies that are in motion and this energy depends on the mass and speed of the body.
Kinetic energy is defined as the amount of work necessary to accelerate a body of a given mass and at rest, until it reaches a given speed.
Potential energyOn the other hand, potential energy is the energy that measures the ability of a system to perform work based on its position. In other words, this is the energy that a body has at a certain height above the ground.
Gravitational potential energy is the energy associated with the gravitational force. This will depend on the relative height of an object to some reference point, the mass, and the force of gravity.
Mechanical energyFinally, mechanical energy is that which a body or a system obtains as a result of the speed of its movement or its specific position, and which is capable of producing mechanical work. Then:
Potential energy + kinetic energy = total mechanical energy
Principle of conservation of mechanical energyThe principle of conservation of mechanical energy indicates that the mechanical energy of a body remains constant when all the forces acting on it are conservative (a force is conservative when the work it does on a body depends only on the initial and final points and not the path taken to get from one to the other.)
Therefore, if the potential energy decreases, the kinetic energy will increase. In the same way, if the kinetics decreases, the potential energy will increase.
This caseThe gravitational potential energy of a ball is 20 J when the ball is dropped.
If principle of conservation of mechanical energy can be applied and the mechanical energy is conserved, the potential and kinetic energy are possible for the ball as it falls.
Learn more about mechanical energy:
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A copper cannot be changed into magnet
Answer:
copper isn't magnetic
Explanation:
8. Feng shines a thin beam of light onto a prism.
The light contains wavelengths of red, blue,
green, and yellow light. The diagram below
shows how the four colors of light exit the prism
at different angles.
Light in
Color 1
Color 2
Color 3
Color 4
Which of the wavelengths is color 1?
A. red light
B. blue light
C. green light
D. yellow light
The color of wavelengths that shown at color 1 is (A). Red light.
IntroductionHi ! Here, I will help you to explain about the refraction of light. When a visible light is bent by water droplets or a prism lens, it will undergo refraction. Refraction will cause light that appears chromatic to be divided into seven spectra, namely: red, orange, yellow, green, blue, indigo, and purple. The order has been ordered from the wavelength, and the red color has the longest wavelength so that it is located at the top and looks the most curved.
ExplanationBased on the image, the part of the light that will come out of "number one" is the red light. In accordance with the initial agreement, that red has the longest wavelength. With this feature, red is very easy to bend to "overshadow" the color spectrum with shorter wavelengths. As a comparison :
The light that will come out from "number two" is a yellow light. Yellow light has a shorter wavelength than red.The light that will come out from "number three" is a green light. Green light has a shorter wavelength than yellow.The light that will come out from "number four" is a blue light. Blue light has a shorter wavelength than green.ConclusionThe color of wavelengths that shown at color 1 is (A). Red light.
How to calculate maximum height given initial velocity.
If a person rides a bike 80 miles in 4 hours, what speed was the person traveling?
Answer:
i think its 20 miles per hour
Explanation:
POSSIBLE POINTS: 60
A steel cable exerts a 100 N force on a cable car at an angle of 35° above the horizontal. What
is the vertical component of this force?
O 81.9 N horizontal (right)
O 57.4 N horizontal (right)
O 81.9 N vertical (up)
o 57.4 N vertical (up)
Answer:
B. 57.4 N horizontal (right)
Explanation:
using cos method:
[tex]cos(35) = \frac{vertical force}{100}[/tex]
[tex]vertical force = 57.4 N[/tex]
As its vertical, the direction of this force should be up.
what is the net force 100n to the left 100 n to the right
Answer:
I believe 0 N
Explanation:
100 to the left can be said to be -100
100 to the right can be said to be +100
+100 + -100 = 0
A source charge of 5. 0 µC generates an electric field of 3. 93 × 105 at the location of a test charge. How far is the test charge from the source charge?.
Answer:
r = 0.338 meters
Explanation:
Q = Source charge
q = Test charge
5μC= 5*10^-6 C
Start with the electric field equation:
[tex]E = \frac{F}{q}[/tex]
and Coulombs law
[tex]F=\frac{k|Qq|}{r^2}[/tex]
Combining these functions we get:
[tex]E=\frac{k|Q|}{r^2}[/tex]
As you can see the test charge cancels so we do not need the value of it.
Plug in your numbers:
[tex]3.93*10^5=\frac{(8.99*10^9)(5*10^-^6)}{r^2}[/tex]
solve for r
[tex]r=\sqrt{\frac{(8.99*10^9)(5*10^-^6)}{(3.93*10^5)} }[/tex]
[tex]r= 0.338 meters[/tex]
How does Alcohol I've a tentative effect?
Answer:
Drinking alcohol clearly has important effect on social behaviors, such as increasing aggression, self-disclosure
Explanation:
did this help
to protec to the virus
Explanation:
i houp its help
An example of a transverse wave is
A. light
B. sound
C. matter
D. none of the above
Answer:
A light
Explanation:
Answer:
y=2x+b-4 with equals an intercept to end up with the answer if you move 5 feet north at 465 degrees run
What is the acceleration of an 24 kg object that applies a force of 130N?
Answer:
To find the acceleration of the object we have to apply Newton second law of motion that is F = mass × acceleration.
Explanation:
Given ,
F = 130N
M = 24kg
A = ?
F = m× a
then ,
130N = 24kg ×a
a = 130/24 = 5 m/s.
An object accelerates at 3 meters per second^2 when a 10-newton (N) force is applied to it . Which force would cause this object to accelerate at 6 meters per second^2?
A. 5 N
B. 10 N
C. 20 N
D. 30 N
which one of the following statments about geothermal power stations is true?
choose one:
-geothermal power stations use fossil fuels
-geothermal power stations use carbon dioxide
-geothermal power stations provide a reliable source of electricity
Answer:
geothermal power stations provide a reliable source of electricity
If Right Please Give Brainliest
A ball is moving in a certain direction. What could happen to the ball if a greater force was applied on the ball along its direction of motion?.
Answer:
the one going faster would prolly stop and the one it hit would start rolling the opposite direction it was. like think about if u were playing pool.
Explanation:
Which energy changes take place when a pedalling cyclist uses a generator (dynamo) to light his bicycle lamp?
Answer: chemical → kinetic → electrical → light
Explanation: At the same time when the generator lights up the bicycle lamp the lamp lights up using electrical energy so mechanical energy is also transformed into electrical energy.
Which best describes what happens to sunlight after it passes through the keyhole of a door? It converges into one particular shadow region. It spreads out into multiple shadow regions. It bends back toward the door. It scatters back toward the door.
Multiple shadow regions can be observed in the wall behind the keyhole of a door. Option B is correct.
What is diffraction?
It is a phenomenon that happens when a wave (Light) is passed through a narrow aperture or a sharp edge, the light bends at the edges.
The light bends at the edges because the sharp edges have less diameter than the wavelength of light.
Therefore, multiple shadow regions can be observed in the wall behind the keyhole of a door.
Learn more about diffraction:
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Answer: B) It spreads out into multiple shadow regions.
Explanation:
I got it right on edge
How can gravity be simulated in an orbiting space station?.
Answer:
A spinning space station will have centrifugal force acting on the inhabitants which if adjusted right can simulate the force of gravity on Earth
Explanation:
