A circle has an area of 2.0 m2 . A second circle has triple the radius of the first. The area of the second circle is _____ times that of the first
a. 27
c. 3.0
b. 9.0
d. 0.67
B
You might also like to view...
An ideal transformer is one that:
a. has a turn ratio, N2/N1, equal to 1. b. works with direct current. c. experiences no power loss. d. has an output frequency of 60 Hz.
A particle of positive charge q travels with velocity v towards the top of the page. The magnetic field present, B, points rightward. The force
1.points leftward. 2.points into the page. 3.points toward the bottom of the page. 4.points out of the page.
Two charges, +Q and ?Q, are located two meters apart and there is a point along the line that is equidistant from the two charges as indicated. Which vector best represents the direction of the electric field at that point?
a.
Vector EA
b.
Vector EB
c.
Vector EC
d.
The electric field at that point is zero.
A car goes around a circular curve on a horizontal road at constant speed. What is the direction of the friction force on the car due to the road?
A) tangent to the curve in the forward direction B) tangent to the curve opposite to the direction of the car's motion C) perpendicular to the curve outward D) perpendicular to the curve inward E) There is no friction on the car because its speed is constant.