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You hang the rod vertically and attach a 76 kg mass to the bottom, and you observe that the bar becomes 1.44 cm longer. From these measurements, it is possible to determine the stiffness of one int
Your toaster has a power cord with a resistance of 0.017 connected in series with a 10.2 nichrome heating element. The potential difference between the terminals of the toaster is 120v how to figur
A fountain shoots a jet of water 10 m into the air. The fountain has a round nozzle of diameter 2.5 cm at ground level, fed by a pump located 3.5 m below ground through a round pipe of diameter 9.1
(a) Find the charge that appears on the positive electrode. (b) Find the charge that appears on the negative electrode. (c) Find the net charge of the entire capacitor.
An initially neutral ball bearing is hooked up to a machine that transfers electrons onto it. Afterwards, the ball bearing is analyzed and its charge is -2.81×10^-9 C. Find the mass increase
You (mass 80 kg) and your friend (mass unknown) are in a rowboat (mass 60 kg) on a calm lake. You are at the center of the boat rowing and she is at the back, 2 m from the center. You get tired and
The electric field at the point x = 5.00cm and y = 0 points in the positive x direction with a magnitude of 8.00 N/C. At the point x = 10cm and y = 0 the electric field points in the positive x dir
Long, long ago, on a planet far, far away, a physics experiment was carried out. First, a 0.250- ball with zero net charge was dropped from rest at a height of 1.00 . The ball landed 0.400 later. Ne
y is the displacement of a string particle and x is the position of the particle on the string. The wave is traveling in the +x direction. What is the speed v of the wave?
If you apply 20 N of force on a crate on a warehouse floor and the crate refuses to move, what frictional force does the floor present to the crate?
A helicopter is ascending vertically with a speed of 5.97 . At a height of 124 above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?
The value of the Coulomb constant is 8.98755 × 109 N · m2/C2 and the charge on an electron is 1.6 × 10-19 C What is the distance between the two spheres?
A flywheel rotating at 640 rev/min is brought to rest with a uniform deceleration of 2.0 rad/s^2. How many revolutions does it make before coming to rest.
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?