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Mekhanik [1.2K]
3 years ago
15

In a free body diagram, the force arrows always point what way?

Physics
2 answers:
swat323 years ago
8 0

Forces are presented as straight arrows pointing in the direction they function  on the body.

dusya [7]3 years ago
4 0

The force arrows always points straight arrows.

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What is 6.02 x 10^4 in standard notation
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I believe you mean 6.02*10^7 but you want to shift the decimal 7 times to the right which would be 60200000 (:
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What happens as water cools
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it decreases in size

Explanation:

The reason why this happens is simply just condensation. unlike when water is boiling, that is evaporating

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What are the four importance of apron?​
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3 years ago
A student wishes to determine the heat capacity of a coffee-cup calorimeter. After she mixes 108.7 g of water at 60.2°C with 108
Oduvanchick [21]

Answer : The heat capacity of the calorimeter is, 6.72J/g^oC

Explanation :

In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.

q_1=-q_2

m_1\times c_1\times (T_f-T_1)=-m_2\times c_2\times (T_f-T_2)

where,

c_1 = specific heat of water = 4.184J/g^oC

c_2 = specific heat of calorimeter = ?

m_1 = mass of water = 108.7 g

m_2 = mass of calorimeter = 108.7 g

T_f = final temperature of mixture = 35.0^oC

T_1 = initial temperature of water = 60.2^oC

T_2 = initial temperature of calorimeter = 19.3^oC

Now put all the given values in the above formula, we get

(108.7g)\times (4.184J/g^oC)\times (35.0-60.2)^oC=-(108.7g)\times c_2\times (35.0-19.3)^oC

c_2=6.72J/g^oC

Therefore, the heat capacity of the calorimeter is, 6.72J/g^oC

3 0
3 years ago
1. Determine the potential energy of a 2kg rock at the top of a hill that is 20m high.
ycow [4]

Answer:

1) 392 joules

2) 625,000 joules

3) 156,800 joules

Explanation:

Gravitational potential energy = mgh. m = mass in kg, g = acceleration due to gravity and h = height in meters.

Kinetic energy = 1/2(m)(v)^2, m = mass in kg, v = velocity in meters per second

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2) K.E = 1/2 x 2000 x (25)^2 = 625,000 joules

3) P.E = 80 x 9.8 x 200 = 156,800 joules

6 0
3 years ago
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