How to calculate the current

How do we see an object that isn't luminous?

A test charge of - 1.4 * 10-7 coulombs experiences a force of 5.4 * 10-1 newtons. Calculate the magnitude of the electric field created by the negative test charge. A. 1.4 * 106 newtons/coulomb B. 1.9 * 106 newtons/coulomb C. 5.

If you lift the front wheel of a poorly maintained bicycle off the ground and then start it spinning at 0.69 rev/s, friction in the bearings causes the wheel to stop in just 13 s. If the moment of inertia of the wheel about its axle is 0.

If a diver runs off a 100m cliff horizontally with a speed of 17m/s, what is his horizontal speed just before he hits the water?

When a compound is broken down in the chemical reaction, its atoms are A. used to form new compound B. destroyed and new atoms are created C. considered exothermic

An object is suspended from the ceiling with two wires that make an angle of 40° with the ceiling. The weight of the body is 150 N. What is the tension in each wire? 41.6 newtons 82.3 newtons 150 newtons 117 newtons

What is the value of 9682 when rounded to three significant figures

Why do atoms move at different speeds depending on wether they are liquids or solids

What are the arrangement of resistors in series

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?