4. A bottle 5.89 cm tall is 56.2 cm to the left of a plane mirror. What is the h
ID: 1398166 • Letter: 4
Question
4.
A bottle 5.89 cm tall is 56.2 cm to the left of a plane mirror. What is the height of the image formed?
11.8 cm
56.2 cm
5.89 cm
2.95 cm
5.
For two small nuclei to fuse, their kinetic energies must be great enough to overcome _____.
the strong nuclear force that attracts them together
the electrical repulsion of their positive charges
the electrical attraction between them and their electrons
6.
A thermal insulator is a material that _____.
never reaches thermal equilibrium with objects in contact with it
allows the passage of heat
resists the passage of heat
quickly reaches thermal equilibrium with objects in contact with it
7.
A circuit in a small appliance operates on a current of 1.5 mA. How many electrons enter and leave this part of the appliance in 5.0 s?
4.7 x 1016
2.2 x 1016
1.6 x 1016
3.5 x 1016
4.
A bottle 5.89 cm tall is 56.2 cm to the left of a plane mirror. What is the height of the image formed?
11.8 cm
56.2 cm
5.89 cm
2.95 cm
Explanation / Answer
4) 5.89 cm
5) the electrical repulsion of their positive charges
6) resists the passage of heat
7) 4.7*10^16
I = dq/dt
==> dq = I*dt
= 1.5*10^-3*5
= 7.5*10^-3 C
= 7.5*10^-3/(1.6*10^-19)
= 4.7*10^16
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