The path of a charged particle moving parallel to a uniform magnetic field will be a
a. straight line.
b. circle.
c. ellipse.
d. parabola.
a
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Under what conditions will prebiotic molecules NOT be manufactured in Miller—Urey experiments?
A) if ammonia (NH3 ) is present in the flask B) if methane (CH4 ) is present in the flask C) if oxygen (O2 ) is present in the flask D) if carbon dioxide (CO2 ) is present in the flask
The most common extrusive rocks are generated from
A) andesitic magma. B) granitic magma. C) basaltic magma. D) none of the above
A circuit consists of 2N resistors, all of resistance R, connected as shown below. A potential difference V is applied to one end, and the other end is at ground potential. The equivalent resistance of the circuit is
A.
.B.
C.
.D.
E.
Consider the following situations:
· a car slowing down at a stop sign · a ball being swung in a circle at constant speed · a vibrating string · the Moon orbiting the Earth · a skydiver falling at terminal speed · an astronaut in an orbiting space station · a ball rolling down a hill · a person driving down a straight section of highway at constant speed with her foot on the accelerator · a molecule in the floor of this room In how many of the situations is the object accelerating?
1.One of the situations. 2.Two of the situations. 3.Three of the situations. 4.Four of the situations. 5.Five of the situations. 6.Six of the situations. 7.Seven of the situations. 8.Eight of the situations. 9.Nine of the situations. 10.None of the situations.