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Dan is gliding on his skateboard at 4.00m/s . He suddenly jumps backward off the skateboard, kicking the skateboard forward at 8.00m/s (as measured by an observer on the ground). Dan's mass is 70.0kg and the skateboard's mass is 4.00kg .
How fast is Dan going as his feet hit the ground?
Alpha-particle scattering experiments using uranium (Z = 92) as the target material show that the alpha-particles experience a pure Coulomb repulsion, Estimate the radius of the uranium nucleus
A point charge q1=+2.40?C is held stationary at the origin. A second point charge q2=-4.30? C moves from the point x= 0.150 m , y= 0m
Two balls are released simultaneously from the top of a tall building. Ball A simply dropped with no initial velocity, and Ball B is thrown downward with and initial velocity of 12 m/s.
The wall of a house consists of three layers: a wooden outer wall with an R factor of 1.0, a 3in layer of fiberglass insulation with an R factor of 11, what is the rate of heat loss throug an 8ft by 15ft section of this wall
In the double-slit experiment, light particle is also called photon. Does the photons go through the slits in the double-slit experiment, How are double-slits related to holograms
If linear momentum is conserved when there is no external force applied, how is angular momentum conserved
A long line carrying a uniform linear charge density +56.0 µC/m runs parallel to and 10 cm from the surface of a large, Find the location of all points on a line perpendicular to the sheet and the charged line
a mass of 200 g vibrates horizontally in Simple Harmonic Motion with a frequency of 30 Hz and amplitude 20 cm. calculate the total energy of the motion
Two 15cm long flat glass plates are separated by a T (10 micro m) thick spacer at one end, Find a relation among spacing between adjacent fringes delta x, lamda, L, and T
What is the intensity level in decibels for a sound with an intensity of 2.35×10-4 W/m2, What is the intensity for a sound with an intensity level of 79.9 dB
What are the velocities of the two people after the snowball is exchanged. What is the greatest kinetic energy of the electrons removed from the cathode by this light.
A 4.1-kg bucket of water is raised from a well by a rope. find the force exerted by the rope on the bucket
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