When a spray can is being used, it feels cooler than when it was first picked up. Why?
What will be an ideal response?
The evaporation of the propellant takes heat away from the can and its surroundings.
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A bullet is fired with a certain velocity at an angle ? above the horizontal at a location where g = 10.0 m/s2. The initial x and y components of its velocity are 86.6 m/s and 50.0 m/s respectively
How long does it take before the bullet gets to the highest point of its trajectory? A) 5.0 seconds B) 10.0 seconds C) 15.0 seconds D) 20.0 seconds E) None of the other choices is correct.
A stream of water is leaking from the roof of a train into the cab below, to the dismay of the passengers in the cab. The train is moving with a constant speed of 100 km/hour. An observer from outside the train sees the situation through the train window as the train passes by. Which observer(s) see a parabolic path for the water as it moves through the air of the cab?
1.the passengers within the cab 2.neither the observer from outside the train nor the passengers within the cab 3.both the observer from outside the train and the passengers within the cab 4.the observer from outside the train
Go to the screen in the interactive figure called "Major Geological Features." Which of the following statements about the Tharsis Bulge, often simply called "Tharsis," are true?
A. Tharsis has several large volcanoes. B. Tharsis is located close to Mars's north pole. C. Tharsis was probably the site of an ancient ocean. D. Tharsis has higher elevation than surrounding regions. E. Tharsis is the most heavily cratered region of Mars. F. One end of Valles Marineris is connected to Tharsis.
Two charges of 15 pC and ?40 pC are inside a cube with sides that are of 0.40-m length. Determine the net electric flux through the surface of the cube.
A. +2.8 N ? m2/C B. ?1.1 N ? m2/C C. +1.1 N ? m2/C D. ?2.8 N ? m2/C E. ?0.47 N ? m2/C