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A 55.0 kg pole vaulter running at 9.7 m/s vaults over the bar. If the vaulter's horizontal component of velocity over the bar is 1.0 m/s and air resistance is disregarded, how high was the jump?
The force vector A has a magnitude of 87.0 newtons (N) and points due east. The force vector B has a magnitude of 124 N and points 73.1 ° north of east. Find the (a) magnitude and (b) direction
A pair of 10 {rm mu F} capacitors in a high-power laser are charged to 1.7 {rm kV}. What charge is stored in each capacitor? How much energy is stored in each capacitor?
Two 10-rm cm-diameter charged disks face each other, 18 cm apart. Both disks are charged to - 50 nC. What is the electric field strength a point on the axis 5.0 rm cm from one disk between them?
A potential difference of 86 mV exists between the inner and outer surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a pos
Suzie (of mass 50 kg) is roller-blading down the sidewalk going 20 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop
Suppose you wish to fabricate a uniform wire out of 2.6 g of copper. If the wire is to have a resistance of R = 0.25 and if all of the copper is to be used, what must be the length of the wire in m
A projectile is fired horizontally from a gun that is 33.0 m above flat ground, emerging from the gun with a speed of 130 m/s. (a) How long does the projectile remain in the air? (b) At what horizo
During a hard sneeze, your eyes might shut for 0.59 s. If you are driving a car at 95 km/h during such a sneeze, how far does the car move during that time?
At one instant a bicyclist is 36.0m due east of a park's flagpole, going due south with a speed of 12.0m/s. Then 38.0s later, the cyclist is 36.0m due north of the flagpole, going due east with a s
A 2.30-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 3.40sin(2pi*t), where F is in newtons and t is in seconds. The fo
An airplane pilot wishes to fly due west. A wind of 84.0 km/h is blowing toward the south. What is the speed of the plane over the ground in km/h?
The force vector A has a magnitude of 82.0 newtons (N) and points due east. The force vector B has a magnitude of 118 N and points 76.0 ° north of east. Find the (a) magnitude and (b) direction
John, a 72-year-old grandfather, had been smoking heavily for 24 years and had a persistent cough. A biopsy of his lung tissue revealed considerable amounts of carbon particles. How could this happ
In SI units: (a) with what upward velocity is the rock shot, (b) what maximum height above the top of the building is reached by the rock, and (c) how tall is the building?
Calculate the electric force one ball exerts on the other, and state whether it is attractive or repulsive. (Enter the magnitude of the force.)
An electron remains suspended between the surface of the Earth (assumed neutral) and a fixed positive point charge, at a distance of 4.99 m from the point charge. Determine the charge required for
A(n) 0.224 kg baseball is thrown with a speed of 22.4 m/s. It is hit straight back at the pitcher with a final speed of 20.8 m/s. What is the magnitude of the impulse delivered to the ball?
A gun shoots bullets that leave the muzzle with a speed of 326 m/s. If a bullet is to hit a target 172 m away at the level of the muzzle, the gun must be aimed at a point above the target. How far
Three pendulums with strings of the same length and bobs of the same mass are pulled out to angles q1, q2 and q3 respectively and released. The approximation sin q = q holds for all three angles, w
A stretched rubber band has a length of 0.14 m and a fundamental frequency of 450 Hz. What is the speed at which waves travel on the rubber band?
A rectangular container measuring 33 cm 38 cm 61 cm is filled with water. What is the mass of this volume of water in kilograms and grams?
A .114 kg baseball is pitched horizontally at 38 m/s. After it is hit by a bat it moves horizontally at -38 m/s. a) What impulse did the bat deliver to the ball?
Suzie (50 kg) is roller-blading down the sidewalk going 20 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 0.5
A parallel-plate capacitor has a plate area of 1cm^1 and a plate separation of 2.5 mm. To obtain an electric field of 1.0*10^6N/m between the plates, the magnitude of the charge on each plate shoul