A piece of iron is heated and then cooled by dropping it in water. The heat lost by the piece would be higher if

Lightning bolts occur when negative charges in clouds: A. Flow positively to the ground B. Flows negatively to the ground C. Flows to the negatively charged clouds D. cause thunder to sound

At which of the following angles will the sunlight received at a location on Earth spread out over the largest area? 1 - 90° 2 - 70° 3 - 40° 4 - 10°

To obtain a learner's license, you must be at least years old.

In order to useful, a variable must be measurable as a numeric value. True False

The sun generates energy through what? a. nuclear fusion b. helium building c. hydrogen synthesis d. atomic separation

Temperature is usually measured in degrees with a (n)

Two lab carts are pushed together with a spring mechanism compressed between them. Upon release, the 5.0 kg cart repels one way with a velocity of 0.12 m/s. The 2.0 kg cart goes the other way. At what velocity does it travel?

A bowling ball has a mass of 7.2 kg and a weight of 70.6 N. It moves down the bowling alley at 1 m/s and strikes a pin with a force of 15.0 N. What is the force that the pin exerts on the bowling ball?

an electric clothes dryer has a resictance of 16 Ohms it drawes 15 A of current what is the voltage in volts of the wall outlet that it is pluged into

A lorry with a mass of 5000kg accelerates to overtake a caravan on the motorway. Its acceleration is 1.5m/s². What force must the engine be providing? You can ignore the effects of friction and air resistance