The velocity of sound in air at stp (standard temperature and pressure) is approximately 344 m/s. if the frequency of the sound wave is = 4.8 khz, what is the wavelength in cm?

The solar system consists of the sun and nine planets moving in definite orbits around the sun. How do the outer planets differ most from the inner planets? A. size and composition B. having shorter years C. the plane of their orbits D.

Um objeto de 200 kg é acelerado a 4 m/s2 sob ação de uma força F. Determine a distância deslocada pelo objeto sob ação dessa força sabendo que a energia transferida para ele foi de 9,6 kJ. a) 8 m b) 10 m c) 12 m d) 13 m e) 14 m

A freight train rolls along a track with considerable momentum. If it rolls at the same speed but hastwice as much mass, its momentum isa. zero. b. doubled. c. quadrupled. d. unchanged.

What are the surfaces of the outer planets mostly made of

A sound from a source has an intensity of 270 db when it is 1 m from the source. what is the intensity of the sound when it is 3 m from the source?

An example of a stable system

What causes chemical weathering? a. damage caused by animals and plants c. natural acids b. ice wedging d. physical factors

1. Strzała o masie 20 g tuż po wystrzale ma prędkość 50 m/s. Oblicz pracę wykonaną przez zawodniczkę. Ile wynosi energia potencjalna sprężystości napiętej cięciwy? 2. Na trampolinę o współczynniku sprężystości k=2 kN/m stanął zawodnik o masie 80 kg.

Two small plastic spheres between them has magnitude 0.22 N. What is the charge on each sphere is one the other? Explain whether it can be determined from the information give, whether the charges are positive or negative.

If it has enough kinetic energy, a moleculeat the surface of the Earth can escape the Earth's gravitation. The acceleration of gravity is 9.8 m/s2, and the Boltzmanns' constant is 1.38066*10-23 J/K.