Are waves matter or not?

A pair of scissors is a complex machine. what simple machines make up a pair of scissors?

Does the suns mass pulls the planets in orbit around earth?

Which one of the following is not an organic compound? Why? CH4 C2H6O Ca0

Ball 1 is launched with an initial vertical velocity v1 = 146 ft/sec. Ball 2 is launched 2.3 seconds later with an initial vertical velocity v2. Determine v2 if the balls are to collide at an altitude of 234 ft.

A 30.0-kg child sits on one end of a long uniform beam having a mass of 20.0 kg, and a 40.0-kg child sits on the other end. The beam balances when a fulcrum is placed below the beam a distance 1.10 m from the 30.0-kg child. How long is the beam?

200 525000 lololo Boat A is 10 km north of a port. Boat B is 5 km east of the same port. Boat A sails in a straight line towards boat B. Work out the bearing on which boat A sails.

Is Li greater than He on the periodic table?

White light falls on a yellow filter, if: (a) A green filter is placed behind a yellow filter, what is the colour of the light that will emerge from the green filter?

Calculate the energy equivalent in joules of the mass of a proton. [Show all work, including the equation and substitution with units.]

If the weight is 950 newtons, what is the mass?