You are standing in a moving bus, and you suddenly fall backward. You can imply from this that the bus's
A) velocity increased.
B) speed remained the same, but it's turning to the left.
C) velocity decreased.
D) speed remained the same, but it's turning to the right.
E) the bus stopped.
A
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A resistor is made out of a wire having a length L. When the ends of the wire are attached across the terminals of an ideal battery having a constant voltage V0 across its terminals, a current I flows through the wire
If the wire were cut in half, making two wires of length L/2, and both wires were attached across the terminals of the battery (the right ends of both wires attached to one terminal, and the left ends attached to the other terminal), how much current would the battery put out? A) 4I B) 2I C) I D) I/2 E) I/4
The luminosity of the Sun is about 4 x 1015watts (joules per second)
Indicate whether the statement is true or false
The fluid to which Bernoulli's equation is applied is based on what being conserved for the fluid?
a. its momentum c. its kinetic energy b. its potential energy d. its total mechanical energy
The size of a neutron star is
a. about the same as that of our Solar System. b. about the same as that of the Sun. c. about the same as Earth. d. smaller than any of these.