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nasty-shy [4]
3 years ago
6

The mass of an object is 10 kg and the velocity is 4 m/s, what is the momentum?

Physics
1 answer:
eduard3 years ago
3 0

The answer is 40 kg. m/s.

Formula for momentum:

p=mv

p=(10 kg.)(4 m/s)

So, therefore, the final answer is p=40 kg. m/s.

I hope this helped answer your question. Enjoy your day, and take care!

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A block is at rest on the incline shown in the gure. The coefficients of static and kinetic friction are 0.6 and 0.51, respec- t
Alekssandra [29.7K]

Normal reaction force on the block while it is at rest on the inclined plane is given as

F_n = mgcos\theta

here we know that

m = 46 kg

\theta = 29^o

now we will have

F_n = 46*9.8*cos29 = 394.3 N

now the limiting friction or maximum value of static friction on the block will be given as

F_s = \mu_s * F_n

F_s = 0.6 * 394.3 = 236.56 N

Above value is the maximum value of force at which block will not slide

Now the weight of the block which is parallel to inclined plane is given as

F_{||} = mg sin\theta

here we know that

F_{||} = 46*9.8 sin29 = 218.55 N

Now since the weight of the block here is less than the value of limiting friction force and also the block is at rest then the frictional force on the block is static friction and it will just counter balance the weight of the block along the inclined plane.

So here <u>friction force on the given block will be same as its component on weight which is 218.55 N</u>

5 0
3 years ago
Air is a gas and the particles can be pushed closer toegether which is called
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Gases are easily compressed, the particles have large spaces between them, so it is easy to push them closer together. Gases have very low densities, there are huge amounts of space between particles. Due to the large spaces between particles in a gas you can force the particles closer together using a plunger.
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Which of the following statements is false?
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A is false because light and sound waves can both reflect off of objects
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When an oxygen atom forms an ion, it gains two electrons. What is the electrical charge of the oxygen ion?
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-2. This is because it is gaining electrons. Electrons are negative. Therefore it is a negative charge.
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Liquid water at 25°C and 1 bar fills a rigid vessel. If heat is added to the water until its temperature reaches 50°C, what pres
Tcecarenko [31]

Answer:

The developed pressure is 205.75 bar.

Explanation:

Given that,

Temperature of water =25°C = 273+25 = 298 K

Pressure = 1 bar

Increases temperature = 50°C = 273+50 = 323 K

Value of \beta = 36.2\times10^{-5}\ K^{-1}

Value of k=4.42\times10^{-5}\ bar^{-1}

Specific volume of liquid = 1.0030 cm³/g

We need to calculate the final pressure

Using formula for constant volume change

\beta(T_{2}-T)_{1})-k(P_{2}-P_{1})=0

Put the value into the formula

36.2\times10^{-5}(323-298)-4.42\times10^{-5}(P_{2}-1)=0

P_{2}=\dfrac{36.2\times10^{-5}(323-298)}{4.42\times10^{-5}}+1

P_{2}=205.75\ bar

Hence, The developed pressure is 205.75 bar.

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3 years ago
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