An ice sheet 5m thick covers a lake that is 20m deep. what is the temperature of the water at the bottom of the lake? explain your answer. coefficient of volume expansivity at 20 degree centigrade is 2.1x10^-4

A motorcycle is moving at 30 m/s when the rider applies the brakes, giving the motorcycle a constant deceleration. During the 3.1 s interval immediately after braking begins, the speed decreases to 15 m/s.

While working out, a man performed 200 J of work in 3 seconds. What was his power? O A. 600 W O B. 66.7 W O c. 1123 W O D. 33 3W

Which label belongs in the area marked X? Current Magnetic field Solenoid Force on wire

What sleep disorder requires a medical specialist? drowsiness bad dreams sleep apnea going to bed late O

A pregnant woman goes out of her room goes to the fridgeopens a can of tuna a soda a yogurt a cookie Which one did she open first?

Kim holds a pinwheel in the air and says it can be used to model a source of energy. Identify the type of energy Kim's pinwheel models. Explain the type of energy source used.

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.