If a hydrogen atom has its electron in the n = 4 state, how much energy in eV is needed to ionize it?

2. What effect does increasing the current have on a solenoid? A It will weaken the poles of the electromagnet. OB It will reverse the current's flow. C It will produce a weaker magnetic field. D It will produce a stronger magnetic field.

How does end A of the rod react when the charged ball approaches it after a great many previous contacts with end A?

Paceship 1 and spaceship 2 have equal masses of 300 kg. spaceship 1 has a speed of 0 m/s, and spaceship 2 has a speed of 4 m/s. what is the magnitude of their combined momentum?

A parallel circuit contains four branches. One branch has a current flow of 0.8 A, another has a current flow of 1.2 A, the third has a current flow of 0.25 A, and the fourth has a current flow of 1.5 A.

How long must a current of 100ma flow so as to transfer a charge of 80c

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?