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Travka [436]
3 years ago
5

Read the paragraph.

Physics
2 answers:
Nesterboy [21]3 years ago
8 0

Answer:

the answer is A ( the verb made )

i did the quiz and got it correct :D

valentinak56 [21]3 years ago
5 0
Omg I have the same question right now. I choose A)The verb made and I got it right
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A car traveling at 12 m/s slows down at a constant rate
daser333 [38]

The deceleration of the car is 3 m/s².

<u>Explanation:</u>

So the initial velocity of the car is given as 12 m/s. As the car is said to slow down and then it stops after 4 seconds, so the final velocity is zero.

We know that the acceleration acting on any object to stop the motion of that object is termed as deceleration or negative acceleration.

This is because, acceleration is the ratio of change in velocity to time taken for that change in velocity.

So., Acceleration =\frac{Final velocity - Initial Velocity }{Time}

      \text { acceleration }=\frac{-12}{4}=-3 \mathrm{m} / \mathrm{s}^{2}

So the deceleration of the car is 3 m/s².

6 0
3 years ago
The technology in the picture produces which energy conversion?
vovikov84 [41]

Answer:

the question is not correct

8 0
3 years ago
A snowboarder starts from rest on an inclined planar snow surface and gives herself a tiny push to start sliding down the hill.
tiny-mole [99]

Answer:

v = 26.52 m/s

Explanation:

Here we know that as she passes the flag she will gain some speed

so here we can say that

Work done by all forces = change in kinetic energy of the system

so we will have

W_g + W_f = \frac{1}{2}mv_f^2 - \frac{1}{2}mv_i^2

here we know that

W_g = mgh

W_f = -\mu mg d

v_i = 0

h = 39.78 m

d = 27.81 m

so we have

mgh - \mu mg d = \frac{1}{2}mv^2 - 0

(9.8)(39.78 - (0.14)(27.81)) = \frac{1}{2} v^2

v = 26.52 m/s

8 0
3 years ago
During a brake test, the rear-engine car is stopped from an initial speed of 86 km/h in a distance of 47 m. If it is known that
Alenkinab [10]

Answer:

1836 N

Explanation:

Given that

Initial speed = 86 km/h

Total distance = 47 m

Mass of the car = 1210 kg

The steps are captured in the calculation attached.

3 0
3 years ago
As more energy from fossil fuels and other fuels is released on Earth, the overall temperature of Earth tends to rise. Discuss h
BlackZzzverrR [31]

Answer:

processes are competitive and reach a thermal equilibrium where the absorbed energy is equal to the energy emitted, this is the equilibrium temperature of the planet.

Explanation:

The temperature of planet Earth is due to two main types of process, internal and external.

Internal processes are all chemical processes that occur that release heat into the environment or due to gases that trap heat on the planet, greenhouse effect

External processes is heating due to energy coming from the Sun. This includes direct heating of the surface by the absorption of energy and reflects of energy in different atmospheric layers.

These are the two terms that heat the Earth

In addition there are several processes so the planet loses energy,

* energy radiation to outer space that is a few degrees kelvin, for which there is a permanent emission

* endothermic processes that need to absorb heat to perform, this lowers the temperature of the system

* liquid (water) system that absorbs large amounts of heat to change state and temperature.

These processes are competitive and reach a thermal equilibrium where the absorbed energy is equal to the energy emitted, this is the equilibrium temperature of the planet.

Therefore it is impossible for the temperature to increase indefinitely since the emission would increase by decreasing the value

5 0
3 years ago
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