Does electro magnetic waves require a medium to travel though one location

To protect her new two-wheeler, Iroda Bike buys a length of chain. She finds that its linear density is 0.88 lb/ft. If she wants to keep its weight below 1.9 lb, what length of chain is she allowed?

A student, standing on a scale in an elevator at rest, sees that his weight is 997 N. As the elevator rises, the scale reads 1226 N and then returns to normal.

Solar radiation is made up of light energy. Light energy can be separated by wavelength and frequency into the electromagnetic spectrum.

A resistor, an inductor, and a capacitor are connected in series to an AC source. What is the condition for resonance to occur? The resistance must be equal to both the inductive reactance and the capacitive reactance.

Which labels, if placed from left to right, best complete the timeline? Z, X, Y Y, Z, W W, X, Z Y, Z, X

What is the mass of an object with a density if 4.0g/cm3 that displaces 3.0cm3 of water?

aluminum has 13 electrons. how many electrons are found in the outermost energy level for this atom which energy level is the outermost

For an ideal fluid flowing through a horizontal pipe, Bernoulli's principle and the continuity equation state that the pressure within the pipe does which of the following? (Assume measurements are taken along the pipe in the direction of fluid flow.

Which of the following is not part of testing a hypothesis? A. Making a theory B. Making a model C. Gathering evidence D. Collecting data

What are two types of charges that particles possess