What is the mass of a falling rock if it hits the ground with a force of 147 newtons?

600-nm light is incident on a diffraction grating with a ruling separation of 1.7 10 m. The second order line occurs at a diffraction angle of: 42 45° 21° 10°

The area of the atom surrounding the nucleus is mostly what

How far can light travel in one year? A. 30 million km B. 10 trillion km C. 300,000 km D. 100 billion km

A 1000 kg car is moving on flat road at a constant speed of 25 m/s. What is the magnitude of average not force, that is required to slowing the car to 12.5 m/s within 22 seconds?

Changing subscripts is one of the steps of balancing a chemical equation

Oil flows upward in the wick of a lantern because of the liquid property called A. meniscusity. B. capillarity. C. density. D. viscosity.

A high-mass star has more "fuel" than a low-mass star. which lives longer? why?

Suppose that, while lying on a beach near the equator of a far-off planet watching the sun set over a calm ocean, you start a stopwatch just as the top of the sun disappears. you then stand, elevating your eyes by a height h = 1.

Suppose you want to know if the color of peoples hair affects how warm it can keep their heads. describe the skills you would use to conduct an experiment to test your inquiry

The mass is increased by a factor of four. What is true about the period? Choose the best answer. The period remains unchanged. The period increases by a factor of four. The period is halved. The period doubles.