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Consider two vectors F~1 and F~2 with magnitudeF1 = 56 N and F2 = 66 Nand where θ1 = 294 ?and θ2 = 204 ?. The angles are measured from the positive x axis with the counter-clockwise angular direction as positive.What is the magnitude of the resultant vectorkF~ k, where F~ = F~1 + F~2 ? What is the direction of this resultant vectorF~ ? Use counterclockwise as the positive angular direction, between the limits of -180?and +180?as measured from the positive x axis.Answer in units of ?.
You throw a 20-N rock vertically into the air from ground level. You observe that when it is a height 15.2m above the ground, find its speed just as it left the ground
A particle of mass m is confined to move in a one-dimensional "infinite" potential well defined by V(x)=0, |x|
The coil of a galvanometer has a resistance of 21.6 ?, and its meter deflects full scale when a current of 5.58 mA passes through it. What is the maximum current that this ammeter can read
When he was first thinking about relativity (and before he developed his theory), find the your friend's speed relative to your reference frame
a 5m long ladder weighs 200n rests against a smooth vertical wall with its base on a horizontal rough floora distance
Explain how Einstein’s contribution to understanding the force between the earth and the moon differed from Newton’s. Include a brief statement of Einstein’s explanation in your answer.
A concert loudspeaker suspended high off the ground emits 32W of sound power, What is the sound intensity level at the position of the microphone
You are 1.7m m tall and stand 3.5m m from a plane mirror that extends vertically upward from the floor. What is the minimum height the mirror must have for you to be able to see the top of the table in the mirror
A major leaguer hits a baseball so that it leaves the bat at a speed of 32.2m/s and at an angle of 35.2 degree above the horizontal. Calculate the horizontal component of the baseball's velocity
How much work does the electric field do in moving a proton from a point with a potential of +175V to a point where it is -50V? Express your answer in joules. Express your answer in electron volts.
In 1971, Apollo 14 astronaut Alan Shepard hit two golf balls while on the Moon. The first one rolled 40 yards into a nearby crater, Is the second ball still on the moon
A ball of mass 522 g starts at rest and slides down a frictionless track. It leaves the track horizontally, striking the ground a distance of 1 m from the end of the track after falling the vertical distance 1.25 m from the end of the track.
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