Question

7. You are holding a meter stick in your lab and a high-speed traveler passes by you and parallel to the meter stick measures the length to be 60 cm. The proper length for the traveler is:

a) none

b) 100 cm

c) the traveler will not have the proper length for the meter stick

d) 60 cm

e) 80 cm

8. A radioactive sample has 2,048 nuclei. It will have one nucleus after:

a) 11 half-lives

b) 8 half-lives

c) none

d) 6 half-lives

e) 10 half-lives

9. A 60 Hz circuit has a maximum voltage of 120 V and consists of a capacitor of 100 microfarads and a resistor of 100 Ohms. What is the capacitive time constant?

a) 1E4 s

b) 0.01 s

c) none

d) 1 s

e) 0.01 F

10. A 60-Hz AC circuit has a maximum voltage of 120V and consists of a capacitor of 100 microfarads, an inductor of 100 mH, and a resistor of 100 Ohm. When is the inductive reactance?

a) 37.68 Amps

b) none

c) 37.68 volts

d) 37.68 Ohms

e) 37,680 Ohms

Please write an answer legibly with an explanation and an upper case letter.

Answer 1