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A hunter on a frozen, essentially frictionless pond uses a rifle that shoots 4.20 g bullets at 975 m/s. The mass of the hunter (including his gun) is 68.5 kg, and the hunter holds tight to the gun after firing it. a) Find the recoil velocity of the hunter if he fires the rifle horizontally. b)Find the recoil velocity of the hunter if he fires the rifle at 58.0 above the horizontal.
Assuming that a light bulb acts as a point source emitting the light isotropically at 100W. What is the root-mean-square value of the electric field at distance d=20m from the bulb
Using the fact that the earth spins on its axis once per day, calculate the earth's orbital angular speed (in ) due to its motion around the sun.
An archer's bow is drawn at its midpoint until the tension in the string is 0.835 times the force exerted by the archer. What is the angle between the two halves of the string
In a 1.31 T magnetic field directed vertically upward, a particle having a charge of magnitude 8.60 uC and initially moving northward at 4.72 km/s is deflected toward the east. Find the magnetic force on the particle
A bike wheel (I=m*(r^2)) is spinning at 20 rad/s, at which point a 100 g rat jumps onto the wheel, what is the mass of the bike wheel
X-rays having an energy of 300 keV undergo Compton scattering from a target. The scattered rays are detected at 37.0° relative to the incident rays. find the energy of the recoiling electron
An electron in a television tube travels the 22 cm distance from the grid to the screen at an average speed of 7.00 107m/s. How long does the trip take
A 10.39-m ladder with a mass of 24.8 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 264 N. What is the net torque acting on the ladder
Brian is trying to pull Julie on a sled across a flat snowy field. Brian puls on a rope attached to the sled. how much force must Brian exert on the rope to start moving the sled
One afternoon, you are playing on a wooden basketball court with a hula?hoop to amuse yourself. The hoop has a mass of 500g and a radius of 55 cm. What is the hoop's speed just before it hits the wall
A slug of mass 0.100 kg moving straight upward at 50.0 m/s collides with a 0.400 kg wooden block that is 20.0 cm long on a side, What is the loss of kinetic energy immediately before/after the hit
A laser beam strikes one end of a slab of material, Determine the number of internal reflections of the beam before it emerges from the opposite end of the slab
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