Apiece of copper is measured to be at 10°c and 115 grams in mass. if 1300 calories were added to it, what was the final temperature of the copper? 21.3°c 103.5°c 386.8°c 125.6°c 135.6°c

The final temperature of the copper= 39.4°C

Explanation:

mass= 115 g

change in temperature=ΔT=T-10 where T is the final temperature.

specific heat of copper=0.385 J/g °C

Heat energy absorbed= Q=1300 calories

the formula for heat is given by

Q= m C ΔT

1300=(115) (0.385) (T-10)

T-10=29.4

T= 29.4+10

T=39.4°C

Thus the final temperature of the copper= T=39.4°C

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.