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Nikitich [7]
3 years ago
13

You push a box of mass 10kg with a force of 200N. The coeficient of friction between box and floor is 0.2. draw a free body diag

ram and calculate acceleration of the box.​
Physics
1 answer:
AysviL [449]3 years ago
4 0

Answer:

Acclⁿ = 18m/s² .

Explanation:

Mass = 10 kg

Frictional force is acting in opposite dirⁿ . Therefore the net force will be ,

=> F_net = 200N - Fricⁿ force

=> m * a_net = 200N - u mg

=> 10kg *a_net = 200N - 0.2*10*10

=> a_net = 180/10 m/s²

=> a_net = 18m/s²

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During an adiabatic process an object does 100 J of work and its temperature decreases by 5 K. During another process it does 25
Liono4ka [1.6K]

Answer:

The heat capacity for the second process is 15 J/K.

Explanation:

Given that,

Work = 100 J

Change temperature = 5 k

For adiabatic process,

The heat energy always same.

dQ=0

dU=-dW

We need to calculate the number of moles and specific heat

Using formula of heat

dU=nC_{v}dT

nC_{v}=\dfrac{dU}{dT}

Put the value into the formula

nC_{v}=\dfrac{-100}{5}

nC_{v}=-20\ J/K

We need to calculate the heat

Using formula of heat

dQ=nC_{v}(dT_{1})+dW_{1}

Put the value into the formula

dQ=-20\times5+25

dQ=-75\ J

We need to calculate the heat capacity for the second process

Using formula of heat

dQ=nC_{v}(dT_{1})

Put the value into the formula

-75=nC_{v}\times(-5)

nC_{v}=\dfrac{-75}{-5}

nC_{v}=15\ J/K

Hence, The heat capacity for the second process is 15 J/K.

5 0
4 years ago
Select the correct answer.
skelet666 [1.2K]

Answer:

B is the best answer for the question

6 0
3 years ago
Read 2 more answers
How does an atom of bromine-79 become a bromide ion with a -1 charge?
Tanzania [10]

a the atom loses 1 proton to have a total of 34

3 0
3 years ago
QUESTION 1 The speed of sound in air is 340 m/s. What is the wavelength of a soundwave that has a frequency of 968 Hz?​
Anton [14]

Answer:

Explanation:

340 m/s / 968 cyc/s = 0.3512396... ≈ 35.1 cm

7 0
3 years ago
Which process is not required for an animal to obtain energy from food?
Romashka [77]

Complete Question:

Which process is not required for an animal to obtain energy from food?

a. Secretion.

b. Digestion.

c. Excretion.

d. Ingestion.

Answer:

c. Excretion.

Explanation:

Excretion is a metabolic process in which living organisms gets their system rid of metabolic waste, water and excess ions. This is usually done with the aid of kidney, skin and lungs in all vertebrates.

Example of excretions are urination, sweating and defecation.

5 0
4 years ago
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