List the three ways that an emf can be induced in a loop of wire
What will be an ideal response?
1. by changing the magnetic field
2. by changing the area of the loop in the field
3. by changing the loop's orientation with respect to the field
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Standing Waves on a String: A string of linear density 1.5 g/m is under a tension of 20 N. What should be its length if its fundamental resonance frequency is 220 Hz?
A. 0.26 m B. 0.96 m C. 1.1 m D. 1.2 m
Polaris is 10 times larger than Capella A and both are the same color. How much brighter or dimmer is Polaris to Capella?
a. 10× brighter
b. 10× dimmer
c. 100× brighter
d. 100× dimmer
The hottest part of the Sun is
A. the corona. B. the core. C. the photosphere. D. the radiative zone.
What is the formula of a compound formed from the ions M1+ and X3-?
a. M3X b. MX3 c. MX d. None of these