A 350-g air track cart on a horizontal air track is attached to a string that goes over a frictionless pulley with a moment of inertia of 6.00 × 10-6 kg ? m2 and a radius of 1.35 cm
If the string is pulled vertically downward by a force of 2.50 N, (a) what is the magnitude of the acceleration of the cart, and (b) what is the tension in the horizontal string between the pulley and the cart?
(a) 6.53 m/s2 (b) 2.29 N
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A small ball is tied to one end of a light 2.5-m wire, and the other end of the wire is hooked to the ceiling. A person pulls the ball to the side until the wire makes an angle of 35° with the plane of the ceiling and then gently releases it
What is the angular speed of the ball, in rad/s, as it swings through its lowest point?
For carbon dioxide, the van der Waals constants are: a = 0.364 J?m3/mol2, and b = 4.27 × 10-5 m3/mol
Assuming that the van der Waals equation holds at the critical point (where the p-V curve first becomes horizontal and has a point of inflection), what is the critical temperature of carbon dioxide? A) 513 K B) 592 K C) 304 K D) 1026 K E) 326 K
The 500 m-long spaceship Springbrake is at rest on the planet Hitest for refueling. Another spaceship, Summerbrake, passes parallel to Springbrake at 0.600c. The crew on Springbrake measure the length of Summerbrake as it passes and find that the length they measure is exactly the same as the known 500 m rest length of Springbrake. If Summerbrake were at rest next to Springbrake, its length would
then be measured to be a. 180 m. b. 320 m. c. 500 m. d. 625 m. e. 781 m.
If it takes 50 photons per 0.1 s entering the eye so that the brain senses the light, which of the following colors of light would be delivering the most power to the eye at this minimum perception level?
a. red c. blue b. violet d. All would be delivering the same power.