A number has a atomic number of 9 and an atomic mass of 19 amu. how many protons and how many neutrons are present in the atom

What is friction. what does friction do as an ice skater slide across the ice?

What type of meter would be connected on both sides of the resistor in a circuit

Bonnie sits on the outer rim of a merry-go-round, and Jill sits midway between the center and the rim. The merrygo-round makes one complete revolution every 2 seconds. Jill's linear velocity is: a. four times Bonnie's. b. one-quarter of Bonnie's. c.

102) Consider massive gliders that slide friction - free along a horizontal air track Glider A has a mass of 1 kg, aspeed of 1 m/s, and collides with Glider B that has a mass of 5 kg and is at rest.

Steam enters a long, horizontal pipe with an inlet diameter of D1 = 16 cm at 2 MPa and 300°C with a velocity of 2.5 m/s. Farther downstream, the conditions are 1.8 MPa and 250°C, and the diameter is D2 = 14 cm.

Which statement about how light travels is true? A Light waves need a medium to travel, and they travel at the same speed even if the light source is moving.

Explain why the car reaches a top speed even though the thrust Force remains constant at 3500N

4. A helicopter is flying at a height of 1.5km. If it has 50MJ of G. P. E., what is the mass of the helicopter?

Unless otherwise posted, what is the speed limit in a school zone? florida

If you put in 10 J of work to push 1 c of charge against and electric field what will be its voltage with respect to its starting position? when released, what will be it's kinetic energy if it flies past it's starting position?