a train travels 99 kilometers in 3 hours, and then 80 kilometers in 5 hours. What is it's average speed?

The grains found in igneous rock: a. are cemented together c. are large b. form an interlocking texture d. will display in one-size only

Simulation a. does not guarantee optimality. b. is flexible and does not require the assumptions of theoretical models. c. allows testing of the system without affecting the real system. d. All of the alternatives are correct.

To simulate deafness, put ear plugs or cotton balls into your ears and put your hands over your ears to block out all sound. Describe this experience in terms of how it changed your perceptions of your environment and how it made you feel.

A ball at rest starts rolling down a hill with a constant acceleration of 3.2 meters/second2. What is the final velocity of the ball after 6.0 seconds?

If earth moves one half its distance from the sun, the gravitational force would be

Which phrases describe organisms that formed index fossils

What will happen to plant height if the amount of available light is reduced due to global dimming? Which type of investigation would most likely be conducted to answer the following question?

A machine has an efficiency of 80%. How much work must be done on the machine so to make it do 50,000 J of output work?

What is the name of the area surrounding earth that is influenced by earth's magnetic field?

A 15 g turntable is covered with a uniform layer of dry ice that has a mass of 9.0 g. The angular speed of the turntable and dry ice is initially 0.75 rad/s. What is the angular speed of the turntable once all the dry ice has evaporated?