amount of heat is removed to lower the temperature of 80 grams of water from 75ºC to 45ºC with specific heat of liquid water is 4.18 J/gºC
= 4.18 J/gºC * 80g * (75-45)ºC
= 10032J
Answer:
The heating element of the heater is made up of alloy which has very high resistance so when current flows through the heating element, it becomes too hot and glows red. But the resistance of cord which is usually of copper or aluminum is very low so it does not glow.
<h2>
The magnitude of the average force acting on the ball during the collision is 340.57 N</h2>
Explanation:
Force is given by rate of change of momentum.
Mass of bullet = 555 g = 0.555 kg
Initial velocity = 14.9 m/s
Final velocity = -12.1 m/s - Opposite direction
Change in momentum = 0.555 x 14.9 - 0.555 x (-12.1)
Change in momentum = 14.985 kg m/s
Time taken = 0.044 s
Rate of change of momentum = Change in momentum ÷ Time
Rate of change of momentum = 14.985 ÷ 0.044
Rate of change of momentum = 340.57 N
Force = 340.57 N
The magnitude of the average force acting on the ball during the collision is 340.57 N
Answer:
too jamble whats the question friest ones a tho
Explanation:
