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kati45 [8]
3 years ago
7

What is the mass of a stone moving at a speed of

Physics
2 answers:
Serhud [2]3 years ago
6 0
P = m*v 7.5 = m*15 m = 7.5/15 = 0.5 kg
Dovator [93]3 years ago
6 0

Answer: A 0.5kg

Explanation:

Momentum is defined as the product of mass and velocity of a body.

Momentum = mass × velocity

Mass = ?

Momentum = 7.5kgm/s

Velocity = 15m/s

Mass = Momentum/Velocity

Mass = 7.5/15

Mass = 0.5kg

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A driver drove for 3 hours at a certain speed. if he drove 12 more miles at the same speed, the distance would be 132 miles. at
Zepler [3.9K]

Answer:

40mph

Explanation:

1st leg DATA:

time = 3 hrs ; speed = r mph ; distance = 3r miles

------------

2nd leg DATA:

speed = r mph ; distance = 12 miles

 

--------------------------------

3r + 12 = 132

3r = 120

rate = 40 mph

4 0
3 years ago
Which of these are broken down during chemical, but not physical, changes?
Doss [256]

I think your answer is D

because you already said its not a B is a liquid and  not a solid so its harder to have a chemical change C is solutions and D is compound and I know for a fact that a compound is a solid and if C is also a solid then that could also be a possible answer choice.

5 0
2 years ago
What kind of stored energy enables a stretched bow to shoot an arrow?
blsea [12.9K]
Sorry if im wrong but I'll say kinetic energy

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7 0
3 years ago
Read 2 more answers
A wheel decelerates from 13.5 rad s−1 to 6.0 rad s−1 in 7 s. Calculate the angular displacement​
Igoryamba

Answer:

<em>Angular displacement=68.25 rad</em>

Explanation:

<u>Circular Motion</u>

If the angular speed varies from ωo to ωf in a time t, then the angular acceleration is given by:

\displaystyle \alpha=\frac{\omega_f-\omega_o}{t}

The angular displacement is given by:

\displaystyle \theta=\omega_o.t+\frac{\alpha.t^2}{2}

The wheel decelerates from ωo=13.5 rad/s to ωf=6 rad/s in t=7 s, thus:

\displaystyle \alpha=\frac{6-13.5}{7}

\displaystyle \alpha=\frac{-7.5}{7}

\displaystyle \alpha=-1.071 \ rad/s^2

Thus, the angular displacement is:

\displaystyle \theta=13.5*7+\frac{-1.071*7^2}{2}

\displaystyle \theta=94.5-26.25

\boxed{\displaystyle \theta=68.25\ rad}

Angular displacement=68.25 rad

3 0
3 years ago
If a substance besides water is changed from a gas to a liquid and then to a solid, what happens to the particles?
NARA [144]
The correct answer is they get closer together

Going from gas into a liquid makes the molecules move closer together, which happens again when you turn it into a solid.
3 0
3 years ago
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