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1. A ball travelling horizontally at 5.6m/s role off the edge of a cliff. How long does it take to fall 2.7m?
2. Without pushing himself with his poles, a skier glides down a slope 13.5degrees below the horizontal. If the force of friction is not significant, what is his acceleration?
A 2120 kg car moving east at 10.7 m/s collides with a 3240 kg car moving east. The cars stick together and move east as a unit after the collision at a velocity of 6.48 m/s.
An electron beam is deflected upward through 3.23 mm while traveling in a vacuum between two deflection plates 11.6 mm apart, What is the kinetic energy of each electron when it leaves the space between the plates
two point charges are distance d 43.5 cm apart they have equal and opposite charge each with magnitude q 8.94 oc. the
Two masses M1=10 kilogram and M2= 8 kilogram are accelerated by a force of 60 Newton at an angle of 53o above the horizontal. Find the tension in the rope between the masses
The angle of incidence of a light beam onto a reflecting surface is continuously variable. The reflected ray in air is completely polarized when the angle of incidence is 49.2°. What is the index of refraction of the reflecting material?
A source emitting sound in air at frequency of 1000 Hz recedesfrom an observer with speed 1/5 speed of sound. If observer moves towards source at a speed of 1/10 speed ofsound, what frequency does he measure
A helium balloon is utilized to lift a load of 103 N. The weight of the envelope of the balloon is 50 N and the volume of the helium when the balloon is fully inflated is 29 m3. The atmospheric pressure is 1.00 atm and the temperature of the air is 0..
A telescope is designed using an objective lens f focal length f(obj)=2m and an eyepiece of focal length f(eye)=8cm. Find the location and size of the image of Jupiter formed by the objective lens
A box of 25 kg is pushed horizontally, with a force of 200 N, up a 37o (with respect to the horizontal) frictionless incline. What is the acceleration of the box
A CD with a diameter of 12.0 cm starts from rest and with a constant angular acceleration of 1.00 rad/sec2 acquires an angular velocity of 5.00 rad/sec.
At t=0, let Q=Q0 and I = 0 in an LC circuit. At the first moment when the energy is shared equally by the inductor and the capacitor, determine what is the charge on the capacitor
A thin spherical shell has a radius of 2.1 m and a mass of 360 kg, and its center is located at the origin of a coordinate system. What is the gravitational force of attraction between the two shells
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