Recent Homework Questions About Physics
A conducting slider (thick line) moves without friction along a vertical U-shaped conducting track (thin line) in a magnetic field. When the switch has been closed for a long time, what is the magnetic field magnitude inside the inductor in Tesla?
Friday, December 6, 2013 at 3:23pm
true or false an object with a mass of 9.0 kg has an acceleration of 3 m/s. the force acting on it is 3n
Friday, December 6, 2013 at 2:47pm
A spherical non-rotating planet (with no atmosphere) has mass 4 kg and radius 9000 km. A projectile of mass is fired from the surface of the planet at a point with a speed at an angle with respect to the radial direction. In its subsequent trajectory the projectile reaches a ...
Friday, December 6, 2013 at 2:33pm
Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where V1 = 5.0 10-3 m3 and V2 = 20.0 10-3 m3.
Friday, December 6, 2013 at 2:28pm
The rate of heat conduction out of a window on a winter day is rapid enough to chill the air next to it. To see just how rapidly windows conduct heat, calculate the rate of conduction in watts through a 3.00 m2 window that is 0.600 cm thick if the temperatures of the inner and...
Friday, December 6, 2013 at 2:26pm
A 2.00 g lead bullet traveling at 650 m/s strikes a target, converting its kinetic energy into thermal energy. It's initial temperature is 40.0°C. Find the available kinetic energy of the bullet. Find the heat required to melt the bullet (both answers in J)
Friday, December 6, 2013 at 2:24pm
A 0.0400 kg ice cube at -30.0°C is placed in 0.400 kg of 35.0°C water in a very well insulated container. What is the final temperature?
Friday, December 6, 2013 at 2:19pm
Some incandescent light bulbs are filled with argon gas. What is vrms for argon atoms near the filament, assuming their temperature is 2100 K?
Friday, December 6, 2013 at 2:18pm
The height of the Washington Monument is measured to be 170 m on a day when its temperature is 35.0°C. What will the change in its height be on a day when its temperature falls to -12.0°C? Although the monument is made of limestone, take the thermal coefficient of ...
Friday, December 6, 2013 at 2:17pm
A boy jumps at a speed of 16.0 m/s at an angle of 20.0 above the horizontal. How long does he stay in the air before touching the ground? A. 1.53 s B. 1.12 s C. 3.07 s D. 4.2 s
Friday, December 6, 2013 at 2:07pm
A 5.0 kg \rm kg, 52-cm \rm cm-diameter cylinder rotates on an axle passing through one edge. The axle is parallel to the floor. The cylinder is held with the center of mass at the same height as the axle, then released. a)What is the magnitude of the cylinder's initial ...
Friday, December 6, 2013 at 2:03pm
Person A walks 6.0 m at an angle of 30 north of east. Person B walks 7.0 m at an angle of 42 west of north. How does the component of the displacement of person A along the north direction compare with the component of the displacement of person B along the north direction? A...
Friday, December 6, 2013 at 12:01pm
Friday, December 6, 2013 at 11:45am
http://www.columbia.edu/~crg2133/Files/Physics/8_01/lotsOfProbs.pdf Prob/ #29
Friday, December 6, 2013 at 10:35am
See previous post: Tue,12-3-13,10:36 PM.
Wednesday, December 4, 2013 at 10:00pm
Vc = 46.4mi/3600s * 1600m/mi = 20.62 m/s Circumference=pi*2r=3.14 * 0.568=1.784 m Period =(1.784m/20.62m)*1s. = 0.0865 s.
Wednesday, December 4, 2013 at 9:53pm
Physics Classical Mechanics
Wednesday, November 27, 2013 at 3:37pm
Friday, March 11, 2011 at 9:36pm