A driver traveling at 29 m / s sees a tree laying in the middle of the road. She brakes to full stop in 4.3 s. Calculate the driver's acceleration while stopping (deceleration). (hint: you know the final velocity)

Which is true about surface waves A) the disturbance is only parallel to the motion of the wave B) the disturbance is in a circular motion C) the disturbance does not have a specific motion D) the disturbance is only perpendicular to the motion of

An immersion heater of power J = 500 W is used to heat water in a bowl. After 2 minutes, the temperature increases from T1 = 85°C to T2 = 90°C.

A car going 12m/s travels a distance of 1.5 km. How long did it take the car to travel this distance?

A radio transfers 270 J of energy electrically, 94.5 J is transferred by sound. Work out the efficiency of this radio. Give your answer as a decimal.

Conceitue, exemplifique e explique a terceira lei de Newton

Describe how mass affects the time required for an object to reach the ground from a given drop height.

A wire of length 25.0 cm carrying a current of 4.21 mA is to be formed into a circular coil and placed in a uniform magnetic field B with arrow of magnitude 5.55 mT. Suppose the torque on the coil from the field is maximized.

Compare the weight of a mountain climber when she is at the bottom of a mountain with her weight when she is at the top of the mountain. In which case is her weight larger? a. Both are the same. b. She weighs four times as much at the top. c.

You recently won a bicycle race that was 100 km in distance. The race took you two hours to complete. What was your average speed?

A hydrogen atom has one proton, two neutrons, and no electrons. Is this atom neutrally charged? Explain your answer.