Meghan and Rachel each apply the same amount of force to two different bowling balls. Meghan's ball, (ball A), weighs 3 pounds,
2 answers:
Answer: The speed of Rachel's all will be more than the speed of the Meghan's ball.
Explanation: Force is defined as the rate of change of momentum of an object over time.
Mathematically,
where, F = force exerted by the object
= change in velocity of the object
m = Mass of the object
t = Time taken
We are given that:
Force exerted by both Rachel and Meghan are same.
Let the mass of Rachel's ball be x.
Mass of Rachel's ball = x
Mass of Meghan's ball = 3x
Relation between mass and speed (velocity) is written by:
The object having higher mass will have the lower velocity or speed.
Hence, the speed of Rachel's ball is more than the Meghan's ball because the mass of Rachel's ball is lower than the Meghan's ball.
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The specific heat of a material is 0.137 J/g°C.
<u>Explanation:</u>
The specific heat formula relates the heat energy required to perform a certain reaction with the mass of the reactants, specific heat and the change in temperature during the reaction.
Q = mcΔT
Here m is the mass, Q is the heat energy required, ΔT is the change in temperature and c is the specific heat.
So, if we have to determine the specific heat of the object, then we have to determine the ratio of heat required to mass of the object with change in time, as shown below.
As mass of the object m is given as 35 g and the energy is said to be absorbed so Q = 96 J.
The temperature values given should be changed from kelvin to celsius first. So, initial temperature 293 K will become 293-273.15 = 19.85°C.
Similarly, the final temperature will be 313 - 273.15 = 39.85°C.
Then, ΔT = 39.85-19.85 = 20 °C
Then,
So, the specific heat of a material is 0.137 J/g°C.