A wire that is 0.36 meters long moves perpendiculariy through a magnetic field at a speed of 0.21 meters/second. The induced emf produced in the wire is 0.45 volts. What is the magnetic field strength?
OA 0.034 newtons/amp-meter
OB.
Oc. 0.26 newtons/amp-meter
OD. O.77 newtons/amp-meter
OE. 6.0 newtons/amp-meter
0.17 newtons/amp-meter

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction. true or false?

Aa a of 22 m/s at an of 36.9 .be . a. b. c. (3)x y of? (3)go? (4) () it to to ?