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Catapult fires an 800-kg rock with an initial velocity of 100 m/sat a 40° angle from ground. What is the magnitude of the horizontal impulse the catapult receives from the rock?
A fish appears to be 7.00 m below the surface of a pond when viewed almost directly above by a fisherman
An electron has a speed of 0.750c. Find the speed of a proton that has the same kinetic energy as the electron
Suppose the mirror is convex. The distance between the image and the object is the same as in part (a), but the image is 0.500 the size of the object. Determine the focal length of the mirror
A 1.6kg , 20-cm-diameter turntable rotates at 50rpm on frictionless bearings. What is the turntable's angular velocity, in rpm, just after this event
A circuit consists of one DC power supply providing 20 V and four resistors R1 = 10 Ohm, R2 = 20 Ohm, R3 = R4 = 40 Ohm. Calculate the total power provided by the power supply
Water moves through a constricted pipe in steady, ideal flow. At the lower point the pressure is 1.65 105 Pa and the pipe radius is 2.60 cm. Find the volume flow rate through the pipe
small metal bead, labeled A, has a charge of 26 . It is touched to metal bead B, initially neutral, then that the two beads share the 26 charge, but not required equally. When the two beads are then placed 5.0 apart, force between them is 5.4×10-..
An investigator collects a sample of a radioactive isotope with an activity of 4.4×105Bq . 72hourslater, the activity is 1.2×105Bq. What is the half-life of the sample
Do you need to take into account the gravitational forces of the earth and moon on the protons? Why? I was thinking yes since thegravitational force on the moon is 1/6th of the Earth's and wouldaffect the weight.
Two identical small insulating balls are suspended by separate0.211 m threads that are attached to a common point on the ceiling. Each ball has a mass of 8.06E-4 kg. Initially the balls areuncharged and hang straight down.
q1. a 1000 kg car travelling at a speed of 20 ms skids to a halt on wet concrete where fk 0.50. how long is the cars
An green hoop with mass mh = 2.8 kg and radius Rh = 0.17 m hangs from a string that goes over a blue solid disk pulley with mass md = 2.4 kg and radius Rd = 0.11 m. What is magnitude of the linear acceleration of the hoop
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