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Mazyrski [523]
3 years ago
7

How much heat is needed to raise the temperature of 8g of water by 20oC?

Physics
1 answer:
Elden [556K]3 years ago
7 0
The following information are given in the question:
Mass, M = 8 g
Temperature, T = 20 degree Celsius
Specific heat of water [this value is a constant] C  = 1 c/gc
Heat, Q = ?
The formula for calculating the amount of heat required is given below:
Q = MCT = 8 * 1 * 20 = 160
Therefore, Q = 160 cal. 
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A 70kg man is moving with a speed of 3.2 m/s on a rough surface, his speed was decreasing uniformly until he reaches to a stop b
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Why are collisions between galaxies more likely than collisions between stars within a galaxy?
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The front 1.20 m of a 1,600-kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a c
eimsori [14]

To develop the problem it is necessary to apply the kinematic equations for the description of the position, speed and acceleration.

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PART A) For the first part we look for the time, in a constant acceleration, knowing the speeds and the displacement therefore we know that,

X_f = X_i +\frac{1}{2}(V_i+V_f)t

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X_f = \frac{1}{2} (V_i+V_f)t

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t = \frac{2X_f}{(V_i+V_f)}

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PART B) This is a question about the impulse of bodies, where we turn to Newton's second law, because:

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a = \frac{(24m/s)^2}{1.2m}

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