Which best describes a graph of voltage over time for DC current?

sine curve

straight, horizontal line

parabolic curve

sawtooth wave

A scientist is using an objective lens with 40X magnification on his microscope. If the ocular lens magnifies 10X, what is the total magnification being used to visualize the specimen?

How much power is required to lift a 60 kg bed to the top of a 3 meter flight of stairs in 10 seconds? A. 17.6 W B. 176 W C. 1760 W D. 17600 W

Which of these would be LEAST useful if one is attempting to create a electromagnet? A) battery B) iron nail C) distilled water D) coil of copper wire

Determina el trabajo realizado al desplazar un bloque 3 m sobre una superficie horizontal, si se desprecia la fricción y la fuerza aplicada tiene una magnitud de 25 N.

Why does the fed rarely change the reserve requirement

A linearly-polarized electromagnetic (EM) wave has an electric field with amplitude 1000 V/m. You hold a a linear polarizer in front of it and rotate the polarizer so that all of the EM wave is blocked. You then rotate the polarizer 30 degree.

Let y'=4 x. find all values of r such that y = rx^{2} satisfies the differential equation. if there is more than one correct answer, enter your answers as a comma separated list.

What are the starting materials for nuclear fission

Why is it possible to throw a 0.145 kg baseball much further than a 7 kg bowling ball?

What is the name of the force that opposes or slows down the motion of objects