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Determine the kinetic energy of a 7.5 kg roller coaster car that is moving with a speed of 42.8 m/s.

A motorcycle is traveling with a velocity of 4 m/s and has a mass of 112 kg

If earth were not tilted, would we still have seasons?

An electric bulb draws a current of 0.8A from 250 V mains. The bulb is used on an average 8 hours a day, If energy costs Rs 3 per kWh, calculate the monthly bill for 30 days.

A skater is standing still on a frictionless rink. Herfriend throws a Frisbee straight at her. In which of the followingcases is the largest momentum transferred to the skater? a) the skater catches the frisbee and hols onto it.

Which would react chemically by forming an ionic bond? A. 2 chlorine atoms with 7 valence electrons each B. 1 neon atom with 8 valence electrons and 1 lithium atom with 1 valence electron C.

Which of these are considered an oxidizing mutagenic agent? x-rays benzopyrene gamma rays

5. A B note has a frequency of 493.88 Hz. Calculate its wavelength in meters.

When one of the electrons of a particular atom undergoes a transition to a quantum state of lower energy, it a) collides with another of its electrons b) exchanges quantum states with another of its electrons c) undergoes a transition to a quantum

What's the symbol for an ionized bromine atom?