A stunt pilot performs a circular dive of radius 800 m. At the bottom of the dive (point B in the figure) the pilot has a speed of 200 m/s which at that instant is increasing at a rate of 20 m/s2. What acceleration does the pilot have at point B?
?
?
A.
m/s2B.
m/s2C.
m/s2D.
m/s2E.
m/s2Answer: C
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Using the assumption that it takes several billion years for complex life to evolve in a stable environment, it is most likely that the stars with inhabited planets are:
A) G and K main sequence stars. B) white dwarf stars. C) A and B main sequence stars. D) neutron stars.
When a fat is treated with NaOH, the ester bonds break to form glycerol and the sodium salts of fatty acids, which are known as ______________
Fill in the blank(s) with correct word
Mesons are composed of ________ quarks, and baryons are composed of ________ quarks
a. two, two b. two, three c. three, two d. three, three
As shown below, a square loop of wire of side a moves through a uniform magnetic field of magnitude B perpendicular to the page at constant velocity
directed to the right. Which statement regarding the electric field induced in the wires is correct for the wires at the left and right sides of the loop?
?
a.
The electric field 
is directed upwards in both the right and left sides of the loop.
b.
The electric field s directed upwards in the right side and downwards in the left side of the loop.
c.
The electric field is directed upwards in the left side and downwards in the right side of the loop.
d.
The electric field is directed downwards in both the right and left sides of the loop.
e.
There is no electric field present in any side of the loop.