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A train is moving east on a straight track with a speed of 12.9 m/s. Raindrops falling straight down with respect to the ground make tracks on the train windows at an angle of 28.8° to the vertical. What is the speed of the raindrops with respect to the ground?
A bullet of mass mB=1.09?10?2kg is moving with a speed of 101.m/s when it collides with a rod of mass mR=6.51kg and length L=1.04m, What is the change in kinetic energy in the collision
A battery's ideal voltage is 12.0 V; its internal resistance is 1.46 ohms. If the battery is attached in series to a 21.5-ohms resistor, what is the actual voltage supplied by the battery?
What are angles of refraction
Two cars approach an ice-covered intersection. One car, of mass 1.27 103 kg, is initially traveling north at 12.1 m/s, Find the velocity of the center of mass of the two-car system just after the collision
An electron starts from rest 54.9cm from a fixed point charge with Q = -0.278uC. How fast will the electron be moving when it is very far away
what must be his average speed if he is heading 30.0° south of west for the remaining 54.6 min? mi/h (b) What is his average velocity for the entire trip?
A black hole attracts an object with mass m with a force of mc2RS/(2r2), where r is the distance between the object and the center of the black hole. What is the mass of this black hole
Assume the 601 turns of wire are used to form a single-turn coil with the same shape but much larger area. What is the current if the maximum torque exerted on the coil by the field is 0.009 Nm
A hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake. Determine the length of the lake
The first person is initially moving forward with a speed of 2.5m/s and second person is initially at rest. What are the velocities of the two people after the snowball is swapped? Disregard friction between the skate and the ice.
Using kinematic equations prove that if two balls are released simultaneously from a table, one with zero velocity and other with horizontal velocity, they will both reach ground at the same time.
Find the gage pressure at the center of pipe A in pounds per square inch and in kilopascals.
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