How to understand physics

Water (2410 gg) is heated until it just begins to boil. If the water absorbs 4.95*105 JJ of heat in the process, what was the initial temperature of the water?

The universe could be considered an isolated system because 1many people think that no energy or matter exists outside the universe. 2energy and matter are created in the universe and flow freely into and out of the universe.

A temperature of 50°F is equal t °C. What is the number in between t and c

What is needed to find an object motion A: position B: direction C: speed D: all three

A lion is stalking an antelope that is running at a speed of 7m/s. At the moment the antelope passes the lion, she gives chase and accelerates at a rate of 5m/s^2. How long will it take the lion to catch up to the antelope?

Through how many volts of potential difference must an electron, initially at rest, be accelerated to achieve a wave length of 0.27nm? A) 4.6 V B) 0.046 V C) 0.27 V D) 4.6 MV E) 4.6 kV

A roller coaster track is a good example of the law of conservation of energy. Use this law to explain these facts about a roller coaster track. a. The largest hill for a roller coaster track is the first hill on the track.

Which statement about the spectrum of light that emerges from a prism is true? A. High-frequency colors bend more than low-frequency colors. B. High-frequency colors bend less than low-frequency colors. C.

What kind of process can create "rogue" waves? a. Constructive interference c. Refraction b. Destructive interference d. Standing waves

What are constellations? 1. Apparent groupings of stars and planets visible on a given evening 2. Groups of galaxies gravitationally bound and close together in the sky 3.