A train travels 90 kilometers in 4 hours, and then 82 kilometers in 1 hours. What is its average speed?

A cube has sides that are each equal to 7 centimeters in length. What is the volume of the cube? A. 49 cm³ B. 149 cm³ C. 210 cm³ D. 343 cm³

A sound wave has a frequency of 247 Hz and a wavelength of 1.4 m. What is the speed of the sound wave in air?

A 15 kg bowling ball has a velocity of 2.6 m/s what is the momentum?

A uniform magnetic field is perpendicular to the plane of a wire loop. If the loop accelerates in the direction of the field, will a current be induced in the loop? Explain why or why not.

What is difference between error and relative error?

What is the most advanced life form on earth

Which EM wave is about the size of humans?

Describe how the Catapult works?

Newton's third law of motion states that the force pair acting on different objects consist of two forces that

While working on her science fair project Venus connected a battery to a circuit that contained a light bulb. Venus decided to change the light bulb to a higher resistance, but she wanted to keep the current the same.