It is useful to think of a photon as a packet of

It has made us think we have to live perfect lives?

Electromagnetic waves A. All have the same wavelength B. Do not carry energy C. Can travel through empty space D. All have the same frequency

A balloon filled with helium plus air at atmospheric pressure is designed to support a mass of 116 kg (payload + empty balloon). Air density is 1.29 kg/m^3, helium plus air density in the balloon is 0.296 kg/m^3, and helium density is 0.179 kg/m^3.

How does the size of a planet affected the amount and type of gas in its atmosphere

If I hit myself, and it hurts, does that make me weak or strong? A. Yes B. No

Animals that can hear ultrasonic sounds are the what

If the rock has a mass of 1 kg which is the speed of the rock after it has fallen for two seconds

2 Cars A and B both at rest are to set of from a town to a common destination along the same route. Car A was the first to take off and travelled at 2.

In an experiment to measure the acceleration due to gravity, g two values, 9.72 m/s2 and 9.67 m/s2, as determined. if the accepted value of g is: 9.8 m/s2 find the followings: i) the percentage difference of the measurements?

If momentum is conserved in a collision, does this indicate conclusively that the collision is elastic?