The helium used to fill birthday balloons doesn’t come out of the air, but from. out of the ground. some of the gas might escape from the ground into the. atmosphere, but the majority of it is trapped in earth’s crust. based on what you have learned from the experiment, give a reasonable explanation for the presence of helium gas in earth’s crust.

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Avery long solenoid of inner radius 2.75 cm creates an oscillating magnetic field of the form = for this solenoid, =0.00425 t and =319 rad/s. (a)what is the maximum value of the induced electric field at a perpendicular distance 1.45 cm from the axis of the solenoid? (b) what is the maximum value of the inducted electric field at a point 5.85 cm perpendicular from the axis of the solenoid?

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?