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Blababa [14]
3 years ago
13

Four balls have the same temperature. Which ball has the most thermal

Physics
2 answers:
puteri [66]3 years ago
7 0

Answer:

a bowling ball because it has the most mass.

Norma-Jean [14]3 years ago
7 0
B. Bowling ball


It’s B because the bowling ball has a greater weight and greater mass too it.
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You are driving down the highway late one night at 20 m/s when a deer steps onto the road 35m in front of you. Your reaction tim
8090 [49]

Answer:

- Distance between car and the deer when the car stopped = 20 m

- The time required for you to stop once you press the brakes = less than 5 s in order not to hit the deer.

Explanation:

Using the equations of motion,

In the 0.5 s reaction time, we need to first calculate how far he has travelled in that time.

a = 0 m/s² (Since the car is travelling at constant velocity)

x = ?

Initial velocity = u = 20 m/s

x = ut + at²/2

x = 20×0.5 + 0 = 10 m

From that moment,

a = - 10 m/s²

u = initial velocity at the start of the deceleration = 10 m/s

v = final velocity = 0 m/s

x = ?

v² = u² + 2ax

0² = 10² + 2(-10)(x)

20x = 100

x = 5 m

Total distance travelled from when the deer stepped onto the road = 10 + 5 = 15 m

Distance between car and the deer when the car stopped = 35 - 15 = 20 m

b) To determine the time required to stop once you step on the brakes

u = 10 m/s

t = ?

v = 0 m/s²

x = distance from when the brake was stepped on to the deer = 35 - 10 = 25 m

x = (u + v)t/2

25 = (10 + 0)t/2

10t = 50

t = 5 s

Meaning the time required to stop once you step on the brakes is less than 5s.

6 0
3 years ago
What is the wavelength of a wave that has a speed of 3 km/s and a frequency of 12 Hz? A. 36 km B. 3.6 km C. 0.25 km D. 4 km
butalik [34]

Answer:

c. 0.25km

Explanation:

v=f x wavelength

3000 = 12 x wavelength

wavelength = 3000/12 = 250m

250m to km

To convert m to km, we divide by 1000

250/1000 =0.25km

wavelength = 0.25km

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What is tensile stress?​
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Tensile strength is the amount of tension a material can hold, at least I hope that’s what it is.
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How does the strong nuclear force compare with the electrostatic force in the nucleus of an atom?
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C. The strong nuclear force is only attractive and acts over shorter distances

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The slope of the line on a speed-time graph tells the speed.
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From the choices provided, the better answer is ' T ' .

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