Where did most of the chemical elements that make up our bodies come from?
A) The Sun
B) Vanished Stars
C) The Big Bang
D) Other planets
B
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Four unequal resistors are connected in series with each other. Which one of the following statements is correct about this combination?
A) The equivalent resistance is equal to that of any one of the resistors. B) The equivalent resistance is equal to average of the four resistances. C) The equivalent resistance is less than that of the smallest resistor. D) The equivalent resistance is less than that of the largest resistor. E) The equivalent resistance is more than the largest resistance.
A tetherball is attached to a pole with a 2.0-m rope. It is circling at 0.20 rev/s. As the rope wraps around the pole, it shortens. How long is the rope when the ball is moving at 6.0 m/s?
a. 1.8 m c. 1.2 m b. 0.83 m d. 1.0 m
There is no upper limit to the mass of a neutron star
Indicate whether the statement is true or false
Planck's quantum theory is compatible with the experimental data related to which of the following?
a. line spectra emitted by hydrogen gas b. the photoelectric effect c. blackbody radiation d. all of these choices