1. which of the following is a direct cause of a substance’s temperature increase? (1 point). energy is removed from the particles of the substance.. kinetic energy is added to the particles of the substance.. the number of atoms and molecules in a substance changes.. the volume of the substance decreases.. 2. as the temperature of a substance increases, its volume tends to increase due to (1 point). thermal equilibrium.. thermal energy.. thermal expansion.. thermal contraction..

1. option b

2. option c

Explanation:

1. When temperature of a substance is increased, it is actually caused by the increase in the kinetic energy of the particles of the substance. The particles vibrate more rigorously. Average kinetic energy of a gas is proportional to temperature:

K.E. =0.5 kT²

thus, option b is correct.

2. As the temperature increases, the substance undergoes thermal expansion. Thus, the volume increases.

Option c is correct

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

b

explanation: