Question 4761:

Which of the following is stored by a dry leclanche cell?

A. Chemical energy
B. Solar energy
C. Electrical energy
D. Heat energy

Question 4762:

A ball is projected horizontally from the top of a hill with a velocity of \(20 m / s\). if it reaches the ground 4 seconds later. What is the height of the hill? \(\left(g=10 m / s ^{2}\right)\)

A. \(200 m\)
B. \(20 m\)
C. \(160 m\)
D. \(40 m\)

Question 4763:

The expansion of solids can be considered a disadvantage in ____________

A. Fire-alarm system
B. Themmostat
C. Riverting of steel plates
D. Balance wheel of a watch

Question 4764:

An object is placed between 2 mirrors inclined at an angle of \(120^{\circ}\) and facing each other. Determine the number of images observed in the 2 mirrors

A. 2
B. 3
C. 4
D. 1

Question 4765:

A girl warming water in a kettle by means of charcoal fire receives the warm of the fire by ____________

A. Convection
B. Absorption
C. Conduction
D. Radiation