Which scenarios are examples of physical changes?

If your brakes give out, why can't you just pull the keys out of the ignition?

What is the 'runaway greenhouse effect' produced by Venus's atmosphere?

Which light waves compose white light

Calculate the frequency of visible light having a wavelength of 686 nm. (c = 3.00 * 108 m/s)

If an engine is described as having 150bhp/6000, the engine produces

if light travels in a vacuum at 3.00 x 10^8m/s and its frequency is 7.44 x 10^7 what is its wavelength

the half-life of carbon - 14 is 5730 years. What fraction of carbon-14 would remain after 11,460 years?

An object with a mass of 10.9 kg experiences a force of 18.53 N. What is the acceleration of the object? A. 2.2 m/s2 B. 1.7 m/s2 C. 16.83 m/s2 D. 1.3 m/s2

A proton, starting from rest, accelerates through a potential difference of 1.0 kV and then moves into a magnetic field of 0.040 T at a right angle to the field. What is the radius of the proton's resulting orbit

Which of the following terms are needed to completely describe speed? Check all that apply. A. Units B. Direction C. Number D. Mass