Which statement about matter and energy agrees with the first law of thermodynamics?
matter and energy can be created, but not destroyed.
matter and energy can be both created and destroyed.
matter and energy cannot be created or destroyed, but can change from one form to another.
matter and energy can be destroyed, but not created.

Matter and energy cannot be created or destroyed, but can change from one form to another.

Explanation: According to first law of thermodynamics, energy of a closed system remains conserved and thus energy can neither be created nor be destroyed, it can only transform from one form to another.

= change in internal energy

q= heat absorbed or released

w= work done y or on the system

Thus change in energy is brought by work or heat which are also forms of energy. Thus energy gets transformed from on form to another.

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

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