Who was the first russian to orbit the earth

The speed of the wave depends on what? A. The properties of the medium through which the wave travels B. The wavelength of the wave C. The frequency of the wave D. both the wavelength and frequency of the wave

Two people who weigh the same amount climb a flight of stairs. the first person climbs the stairs in 30 s, while the second person climbs them in 40 s. which person does more work? which uses more power?

Where are earthquakes most likely to occur? A. Divergent Plate Boundaries B. Hot Spots C. Convergent Plate Boundaries D. Within oceanic plates

A star becomes a red giant and its surface temperature cools from 6000 K to 3000 K. Its peak wavelength originally was 483 nm. What is its peak wavelength after it cools?

A particle of mass 7.00 10-8 kg and charge 7.8-µc is traveling due east. it enters perpendicularly a magnetic field whose magnitude is 29.0 t.

A 3.7 kg block is pushed along a horizontal floor by a force modifyingabove upper f with right-arrow of magnitude 25 n at a downward angle θ = 40°. the coefficient of kinetic friction between the block and the floor is 0.26.

When one object heats another, does the temperature increase of one object always equal the temperature decrease of the other object? Explain

Add the following displacement vectors: 12 m south and 15 m 55° E of N?

And electric current is produced by which of the following processes? A. Electrical resistance B. Transfer of protons C. Convection currents D. Electromagnetic induction

The basic building block of life is