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Darya [45]
3 years ago
13

If the coefficient of friction between block and surface is 0.251 , what was the speed of the bullet immediately before impact?

Answer in units of m/s.

Physics
1 answer:
lubasha [3.4K]3 years ago
4 0

Explanation:

Below is an attachment containing the solution.

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Calculate the potential difference across a 10 ohm register carrying a current of 2.5 ampere​
Bas_tet [7]

Answer:

using ohm's law

V=IR

V= 10 X 0.2

V = 2 Volt.

Explanation:

4 0
2 years ago
What happens if all the heat energy contained in a body is removed? and what will be it's temperature?Explain​
Tema [17]

Answer:

If all the heat energy contained in a body is removed and changes in its temperature is described below in detail.

Explanation:

It moves from a body at a greater temperature to a body at a cheaper temperature. All element survives as solids, liquids, or gases. The material can transfer from one station to another if warmed or cooled. When heat is provided to a body its heat increases: When a physical body, hard, liquid. When heat is provided is stopped to a body its temperature decline.

4 0
2 years ago
Why is copper NOT used as a filament?
chubhunter [2.5K]

Answer:

Short answer, because copper wire does not have high resistance.

Explanation:

6 0
2 years ago
Could you help me with this question?
Scorpion4ik [409]

Answer:

Magnitude of static friction force is 70 sin40° = 44.99 N.  

No, it is not necessary that it is maximum static friction.

Normal force is equal to 70 cos40° = 53.62 N.

Explanation:

We apply newton law of moton equation along the plane and perpendicular to plane;

Along the plane,

70 sin 40° = f_{r}  ---------------(1)

70 cos 40° = N --------------(2)

f_{r}_{max} = μN -----------------(3)

So, it depends on the value of μ that the friction is maximum or not .

7 0
2 years ago
A person lying on an air mattress in the ocean rises and falls through one complete cycle every five seconds. The crests of the
LuckyWell [14K]

Answer:

a) the frequency of the wave is 0.2 Hz

b) the speed of the wave 4 m/s

Explanation:

Given that;

time period = to complete one cycle t = 5 sec

frequency f = 1/t

frequency f = 1 / 5sec

f = 0.2 Hz

Therefore the frequency of the wave is 0.2 Hz

b)

speed of wave V = λf

given that our wavelength is 20.0 m

we substitute

speed of wave V = 20.0 × 0.2

speed of wave V = 4 m/s

Therefore, the speed of the wave 4 m/s

6 0
3 years ago
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