A scalar quantity is defined as
A) a quantity that is specified by a numerical value only.
B) a quantity that is specified by using both a numerical value and a direction.
A
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Two identical particles, each with a mass of 2.0 ?g and a charge of 25 nC, are released simultaneously from rest when the two are 4.0 cm apart. What is the speed of either particle at the instant when the two are separated by 10 cm?
a. 7.3 m/s b. 9.8 m/s c. 9.2 m/s d. 6.5 m/s e. 4.6 m/s
A charge per unit length given by ?(x) = bx, where b = 12 nC/m2, is distributed along the x axis from x = +9.0 cm to x = +16 cm. If the electric potential at infinity is taken to be zero, what is the electric potential at the point P on the y axis at y = 12 cm?
A. 5.4 V B. 7.2 V C. 9.0 V D. 9.9 V E. 16 V
Two inclined planes A and B have the same height but different angles of inclination with the horizontal. Inclided plane A has a steeper angle of inclination than inclined plane B
An object is released at rest from the top of each of the inclined planes. How does the speed of the object at the bottom of inclined plane A compare with that of the speed at the bottom of inclined plane B? A) The speed of the object at the base of inclined plane A would be grater than the speed of the object at the base on inclined plane B. B) The speed of the object at the base of inclined plane B would be grater than the speed of the object at the base on inclined plane A. C) The speed of the object is the same for both inclined planes. D) There is not enough information to answer the question.
Air is pumped into a bicycle tire at constant temperature. The pressure increases because:
A. more molecules strike the tire wall per second B. the molecules are larger C. the molecules are farther apart D. each molecule is moving faster E. each molecule has more kinetic energy