Two equal point charges are separated by a distance d. When the separation is reduced to d/4, what happens to the force between the charges?
A. it decreases by a factor of 4
B. it increases by a factor of 4
C. it increases by a factor of 8
D. it increases by a factor of 16
E. it increases by a factor of more than 16
D. it increases by a factor of 16
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By how much does the current fall after the switch is closed in a series RC circuit when three time constants have elapsed?
A. 5.0% B. 38% C. 62% D. 95% E. 100% since after 2 time constants the current is 0
Most of the current star formation in the Milky Way occurs in its spiral arms
Indicate whether the statement is true or false
The specific heat capacity of copper is three times the specific heat capacity of lead. Equal masses of copper and lead are heated from room temperature to the temperature of boiling water. To achieve this, the amount of heat added to the copper is __________ times the amount of heat added to the lead
Fill in the blank(s) with correct word
A 5.0-kg box slides on the surface on a ramp that rises at 37° above the horizontal. The coefficient of kinetic friction between the box and the surface of the ramp is 0.60
What are the magnitude and direction of the acceleration of the box if it is sliding (a) up the ramp, (b) down the ramp?