A rock weighs 30 n on earth and another rock weighs 30 n on the moon. which rock has the greater mass?

British physicist j. j. thomson was the first to identify the a. atomic theory. b. proton. c. neutron. d. electron.

For which pair of launch angles will two identical projectiles have equal ranges?. A. 19.24°, 80.54°B. 16.42°, 74.58°C. 60.23°, 29.77°D. 89.53°, 01.47°E. 42.42°, 47.59°

A set of pulleys is used to lift a piano weighing 1,000 newtons. The piano is lifted 3 meters in 120 seconds. How much power was used?

Is fire actually hot and why do we call it hot; is it a classification for when something burns you.

A hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake. She hears the echo 2.0 after shouting. Estimate the length of the lake in meters

A symmetric projectile spends a total of 6 seconds in the air. How long does it take to reach its peak height? The projectile has a starting velocity of 8m/s.

A shipn sends out ultrasound that returns from the seabed and is detected after 5 seconds. if the speed of ultrasound through seawater is 1600 m/s what is the distance of the seabed from the ship?

What planet has the longest period of revolution?

How does the potential energy of an object change when its height is tripled

In a plate glass factory, sheets of glass move along a conveyor belt at a speed of 15.0 cm/s. An automatic cutting tool descends at preset intervals to cut the glass to size.