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Q1. A cannonball launched with an initial velocity of 161 m/s at the angle of 45 degrees follows a parabolic path and hits a balloon at the top of its trajectory. Neglect air resistance, how fast is it going when it hits the balloon? What is the acceleration of the cannonball just before it hits balloon?
Q2. A 430 g ball swings in a vertical circle at the end of a 1.68-m-long string. When the ball is at the bottom of the circle, the tension in string is 13 N. What is the speed of the ball at that point?
what is the max number of steps any worker should be allowed.
what is the magnifying power of an astronomical telescope using a reflecting mirror whose radius of curvature is 4.63m and an eyepiece whose focal length is 3.16cm
calculate the magnitude of the force if Q1 is 4 x 10^-9 coulombs and Q2 is 8 x 10^-12 coulombs and the distance between them is 3 x 10^-8 meters.
Two gases are in two separate chambers. The gas in one of the chambers has a temperature of 75 degrees Celsius. Which of the gases has more kinetic energy
A 130 kg crate is pushed at constant speed up the frictionless 28° ramp. What force is exerted by the ramp on the crate
A 0.39 V potential di?erence is maintained across a 1.7 m length of tungsten wire that has a cross-sectional area of 0.85 mm2, What is the current in the wire
A device operates in a three process cycle. In process one, the device receives 35kJ of heat and does no work. Determine the COP or efficiency as applicable
The position of a rocket sled on a straight track is given as x = a t3 + b t2 + c, What is the sled's average speed between t = 3.48 s and t = 6.92 s
While a person is walking, his arms swing through approximately a 45.0^\circ angle in 0.520s. What is the acceleration of a 1.60 gram drop of blood in the fingertips at the bottom of the swing
A 62 g Frisbee is thrown from a point 1.3 m above the ground with a speed of 15 m/s. What was the reduction in the mechanical energy of the Frisbee-Earth system because of air drag
A fox locates its prey under the snow by slight sounds rodents make. how long the fox is in the air
question1a siphon tube is filled with gasoline and closed at each end. one end is inserted into a gasoline tank 0.15 m
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