You are performing studies of the possibility of migrating birds using the earth's magnetic field for navigation. to modify the magnetic field in the brain of a bird, you fit the bird with coils as "caps" and "collars"

the data on the coils indicate that they each have 210 q of resistance, a radius of 1.20 cm, and 50 turns of wire. the centers of the coils are separated by 2.05 cm. you wish to create an "earth-like" magnetic field of 4.0 x 105 t at the midpoint of the axis between the coils. given this data, you need to determine the voltage of the battery (in v) needed to power the coils

v=

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

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.

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?