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Eva8 [605]
3 years ago
7

Which of these choices is the smallest matter

Physics
1 answer:
Ksenya-84 [330]3 years ago
5 0
What are the choices?
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A 5,000 kg truck moving at 8 m/s has the same momentum as a 2,500 kg car. What is the velocity of
a_sh-v [17]

Answer:

16m/s

Explanation:

Mv=mv

5000x8=2500x v

V=5000x8/2500

V=40000/2500

= 16m/s

8 0
3 years ago
An object moving at a velocity of 32 m/s slows to a stop in 4 seconds. What was its acceleration
Leya [2.2K]

Answer:

8

Explanation:

Because you divide 32/4 which gives you 8.

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3 years ago
Which of the following supplies the heat for the hot reservoir in a car's engine?
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Out of the choices given, igniting the gas-air mixture supplies the heat for the hot reservoir in a car's engine. The correct answer is C. 
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3 years ago
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Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals that scientists d
galben [10]
Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals that scientists describe as elliptical. It is one of Kepler's laws. The sun is the focus of all the planets. The correct answer is D.
7 0
3 years ago
A sheet of metal is 2mm wide 10cm tall and 15cm long. it was 4g. what is the density? <br>​
Hoochie [10]

Answer:

Ro = 133 [kg/m³]

Explanation:

In order to solve this problem, we must apply the definition of density, which is defined as the relationship between mass and volume.

Ro = m/V

where:

m = mass [kg]

V = volume [m³]

We will convert the units of length to meters and the mass to kilograms.

L = 15 [cm] = 0.15 [m]

t = 2 [mm] = 0.002 [m]

w = 10 [cm] = 0.1 [m]

Now we can find the volume.

V = 0.15*0.002*0.1\\V = 0.00003 [m^{3} ]

And the mass m = 4 [gramm] = 0.004 [kg]

Ro = 0.004/0.00003\\Ro = 133 [kg/m^{3}]

3 0
3 years ago
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