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A 3kg model rocket initially at rest experiences an average force of 3950N over a distance of 200 cm. What would tne final altitude be of the rocket if the initial altitude above sea level was 225 m at launch?
A generating station is producing 2.00 106 W of power that is to be sent to a small town located 8.0 km away. Find the power used to heat the wires if the power is transmitted at 1300 V
"Two football players are moving toward each other in a straight line. Number 56 has a mass of 116 kg and a velocity of 3 m/s, Determine the velocity (magnitude and direction) of players, after the collision
A force P pulls on a crate of mass m that is in contact with a horizontal rough surface. Which statement best describes the motion of the crate
Two ultrasonic sound waves combine and form a beat frequency that is in the range of human hearing for a healthy young person, What is the largest possible value for the frequency of the other ultrasonic wave
The magnetic field perpendicular to a single 14cm diameter circular loop of copper wire decreases uniformly from 0.750 T to zero. If the wire is 2.25 mm in diameter, how much charge moves past a point in the coil throughout this operation.
A young male adult takes in about 4.46 x 10-4 m3 of fresh air during a normal breath. Fresh air contains approximately 21% oxygen. find the number of oxygen molecules in a normal breath
A small glass bead has been charged to + 30{\rm nC}. What is the magnitude of the acceleration of a proton that is 3.0{\rm cm} from the center of the bead
The asteroid belt circles the sun between the orbits of Mars and Jupiter. One asteroid has a period of 4.4 earth years
A 1400kg weather rocket accelerates upward at 10m/s^ 2 . It explodes 2.5s after liftoff and breaks into two fragments, What was the direction of the heavier fragment
Superman leaps in front of Lois Lane to save her from a volley of bullets. In a 1-minute interval, an automatic weapon fires 152 bullets, Find the average force exerted on Superman's chest
what would the image distance be (pay attention to sign)? cm d. Could the new image be projected on a screen?
A rod suspended on its end and acting as a physcial pendulum swings with a period of T=1.49 sec. What is the length of this physical pendulum
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