A pendulum makes 60 vibrations in 15 secs what's its frequency

Which describes a force acting on an object? a car moving in a straight line a ball that moves when kicked a billiard ball that rolls at a constant speed

How does the atomic radius change from top to bottom in Groups 1 and 2?

11. How many times could Haley fly between the two flowers in 1 minute (60 seconds) ?

What is the density of an object having a mass of 4.0 g and a volume of 39.0 cubic centimeters?

Givin a beat frequency 4.1 Hz and a tuning fork of 256 Hz what is the frequency of a second tuning fork that has a lower pitch?

An example of a stable system

What causes chemical weathering? a. damage caused by animals and plants c. natural acids b. ice wedging d. physical factors

1. Strzała o masie 20 g tuż po wystrzale ma prędkość 50 m/s. Oblicz pracę wykonaną przez zawodniczkę. Ile wynosi energia potencjalna sprężystości napiętej cięciwy? 2. Na trampolinę o współczynniku sprężystości k=2 kN/m stanął zawodnik o masie 80 kg.

Two small plastic spheres between them has magnitude 0.22 N. What is the charge on each sphere is one the other? Explain whether it can be determined from the information give, whether the charges are positive or negative.

If it has enough kinetic energy, a moleculeat the surface of the Earth can escape the Earth's gravitation. The acceleration of gravity is 9.8 m/s2, and the Boltzmanns' constant is 1.38066*10-23 J/K.