In countries where there is very hot and very cold weather, should the gaps between the lengths of railway track be wider or narrower?

What happens to gravitational force and electric force as the distance between two charged objects decreases? O A. Gravitational force decreases and electric force increases O B. Gravitational force increases and electric force decreases. O C.

Light passes from a material with index of refraction 1.25 to one with index of refraction 1.72. The angle of incidence is 34.3°. What is the angle of refraction?

A capacitor is connected to an ac generator. As the generator's frequency is increased, what happens to the capacitor connected ot the ac generator?

Which of the following statements about degeneracy pressure is not true? A) Degeneracy pressure can halt gravitational contraction of a star even when no fusion is occurring in the core. B) Degeneracy pressure keeps any protostar less than 0.

All of the following are types of galaxies except Spiral Elliptical Irregular Spherical

Which of the following objects would have the most inertia? A. A sphere with a radius of 5 cm and a mass of 34 grams. B. A sphere with a radius of 4 cm and a mass of 15 grams. C. A sphere with a radius of 8 cm and a mass of 27 grams. D.

A boy slides a book across the floor using a force of five and over a distance of 2M what is the kinetic energy of the book after he slides at assume there is no friction

Where would aliens be if they really do exist here on Earth?

If the mass of an object is 84g and the volume is 12cm3 what is the density

Describe one example of competiton of tropical dry forest