Energy conversion for a man stepping off a cliff

An arrow of mass 415 g is shot at a target with a speed of 68.5m/s. The target, which has a mass of 3.3 kg, is moving toward the arrow with a speed of 1.1m/s. The surface on which the target is sliding is friction-free.

The blade of a lawn mower is rotating at an angular speed of 128 rad/s. The tangential speed of the outer edge of the blade is 32 m/s. What is the radius of the blade?

Which of these is a balanced chemical equation? CO (g) + O2 (g) - - > CO2 (g) CO (g) + 2O2 (g) - - >2CO2 (g) 2CO (g) + O2 (g) - - > 2CO2 (g) 2CO (g) + 2O2 (g) - - - > 2CO2 (g)

What two kinds of motion are exhibited by electrons in an atom?

Why do our minds fill in the gaps for information we don't know? (Hint: remember what you learned about Gestalt psychology.)

Sound with frequency 1300 Hz leaves a room through a doorway with a width of 1.03 m. At what minimum angle relative to the centerline perpendicular to the doorway will someone outside the room hear no sound

If wavelength is kept constant, which increases as the speed of a wave increases? Question 13 options: period frequency amplitude phase

If the masses of an object increase and their distance from each other stays the same the force of gravity decreases increases stays the same increases then decreases

Which are strong bases? Check all that apply. HCI NaOH NH3 H2CO3 ΠΗΝΟΣ OKOH

The universal force that is effective over the longest distance is called? A:electromagnetic B: strong nuclear C: weak nuclear D: gravity