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Answer:
23.63 °C
Explanation:
= mass of water = 0.250 kg
= initial temperature of water = 20.0 °C
= Specific heat of water = 4186 J/(kg °C)
= mass of aluminum = 0.400 kg
= initial temperature of aluminum = 26.0 °C
= Specific heat of aluminum = 900 J/(kg °C)
= mass of copper = 0.100 kg
= initial temperature of copper = 100 °C
= Specific heat of copper = 386 J/(kg °C)
= Final temperature of mixture
Using conservation of heat
( - ) + ( - ) + ( - ) = 0
(0.250) (4186) ( - 20) + (0.400) (900) ( - 26) + (0.100) (386) ( - 100) = 0
= 23.63 °C
Answer:
gravity is vital because as we know space curves around objects like planets, in this curvature is our atmosphere and a gravitational pull holding everything in, without this curvature we would not have any gravitational pull.
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Explanation:
Answer:
The answer would be 91.9 or 91.8635
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Answer:
Explanation:
As there are no air resistance, the only force acting on the rock will be the gravitational pull of the moon. Near the surface of the moon, we can take the acceleration from the gravitational pull as constant.
Taking this in consideration, we know that the equation for the speed v at time t will be:
.
where is the initial speed, and a the acceleration of the object.
Now, as the initial speed is zero, at time t' the speed will be:
.
and at time 4t'
.
but this is
.
.
So, the answer is 4v.