Physics, 06.06.2021 18:10 Itsyourgirllulu

A 4.00x102 g glass coffee cup is 20.0 oC at room temperature. It is then plunged into hot dishwater at a temperature of 80.0 oC, as shown in figure 1. If the temperature of the coffee cup reaches that of the dishwater, how much heat does the coffee cup absorb? Assume that the mass of the dishwater is large enough so that its temperature does not change appreciably

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Answer from: Quest

answer would be letter choice (a), a ball resting on a shelf. would be another example of potential energy > stored energy > not moving.

a ball spinning on a finger > kinetic energy > moving energy

a ball rolling on the ground > kinetic energy > moving energy

a ball flying through the air > kinetic energy > moving energy

hope that : )

Answer from: Quest

cant without the picture! ?

Answer from: Quest

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 -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [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.

Answer from: Quest

When someone eats food

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A 4.00x102 g glass coffee cup is 20.0 oC at room temperature. It is then plunged into hot dishwater...