A train travels 77 kilometers in 4 hours, and then 76 kilometers in 2 hours. What is its average speed?

When measuring current, always place the meter in a. series with the circuit. c. the highest DC volts position. b. the highest AC volts position. d. parallel with the circuit.

An old lady uses a walker and is able to cross the street. is this inertia?

In a pendulum experiment the pendulum moves from one side to the other side in 0.6 second. Calculate the period of the pendulum.

Which of these models of the solar system first proved that the sun is at one of the foci of Earth's elliptical orbit?

A 5.0-kg rabbit and a 12-kg Irish setter have the same kinetic energy. If the setter is running at speed 4.9 m/s, how fast is the rabbit running?

What is 1.33Ω plus 2Ω?

As a fire truck approached Mary, the pitch of the siren got higher. once the fire truck passed and moved away, the sirens pitch got lower. this change in pitch is because in the sound waves

Find the magnitude of the sum of these two vectors

Light waves that cross from an air medium to a water medium will A. O be focused into a straight line. B. O lose energy and dissipate. C. O change length and direction. D. O reflect off the water's surface.

What is a possible cost of using nonrenewable energy resources? A. Costs more money B. Less water pollution C. Sustainable energy D. Greenhouse gases