How did Edwin Hubble study the redshifting of light from nebulae?

A wave has a frequency of 270 Hz and a wavelength of 60 m. What is the speed of the wave? A. 0.022 m/s B. 0.00062 m/s c. 45 m/s D. 1600 m/s

What decay process occurs in step one

A bus takes half an hour to travel 15km. calculate its speed in m/s

In a young's double-slit experiment, the seventh dark fringe is located 0.028 m to the side of the central bright fringe on a flat screen, which is 1.1 m away from the slits. the separation between the slits is 1.6 * 10-4 m.

In an arrangement for measuring the muzzle velocity of a rifle or pistol, the bullet is fired up at a wooden mass, into which it embeds. The wood is blasted straight up into the air to a measured height h.

Which of the following has the least impact on the environment? A. solar power B. nuclear power C. fossil fuels D. hydroelectric power

Why is steel better to conduct sound than air? use the words density and compression in your answer

4. How does density affect refraction of a lightwave?

Kinetic friction is affected by the weight of the object. TrueFalse

How is the temperature related to the speed of the particles