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Two divers jump from a 5- platform. One jumps upward at 1.50 , and the second steps off the platform as the first passes it on the way down. Part A: What is the first diver's speed as he hits the wa
What are the strength and direction of the electric field at points 4, 8, and 12 cm from the center?
The dry weight of a man is 845 N. When he is submerged underwater, the reading on the scale is only 43.2 N. (a) What is the volume of the man?
The surface charge density on the inside surface is -300nC/m2. The surface charge density on the exterior surface is +300 nC/m2. What are the strength and direction of the electric field at points 4,
What is the angle between the board and the horizontal direction when the box begins to slide down the board?
A 7.0-kg block is at rest on a horizontal floor. If you push horizontally on the 7.0-kg block with a force of 21.0 N, it just starts to move. (a) What is the coefficient of static friction?
The dipole is held perpendicular to a uniform electric field with field strength 1040V/m , then released. What is the dipole's angular velocity at the instant it is aligned with the electric field?
A research submarine has a 40cm diameter window that is 8.2cm thick. The manufacturer says the window can withstand forces up to 1.1×10^6 N . What is the submarine's maximum safe depth in salt
I shoot a basketball at an angle of 65.0 degrees above the horizontal from a height of 2.00 m above the ?oor. the ball is shot at a speed of 9.70 m/s to the ball and the ball leaves my hand a horizo
Imagine a truck with a mass of 23 metric tons (t) (1 t=1,000 kg) barrelling down a highway at a speed of 55 mi/h. What is the truck's momentum in kilograms? What is its kinetic energy in kilograms?
A particle of charge of +4.50 10-6 C is 12.0 cm distant from a second particle of charge of -2.00 10-6 C. Calculate the magnitude of the electrostatic force between the particles.
A hollow metal sphere has 7cm and 11cm inner and outer radii, respectively. The surface charge density on the inside surface is -300nC/m^2. The surface charge density on the exterior surface is +30
Suppose, instead, that the average photon wavelength is 795.0 nm. How many photons per second, N', would enter the aperture?
What is the change in electrical potential energy during the shrinking process? For your own interest, what does the work needed to change the potential energy?
A charge of 21 nC is uniformly distributed along a straight rod of length 4.3 m that is bent into a circular arc with a radius of 1.7 m. What is the magnitude of the electric field at the center of
A 13 kg box must be slid across the floor. If the coefficient of static friction between the box and floor is 0.37, what is the minimum force needed to start the box moving from rest?
A soccer ball is kicked from the ground with an initial speed of 20.6 m/s at an upward angle of 45°. A player 52.4 m away in the direction of the kick starts running to meet the ball at that ins
A parallel plate capacitor has a voltage of 391 V applied across its plates, then the voltage source is removed. what is the voltage is the space between them becomes filled with mica? ( the delectr
An initially uncharged electroscope is polarized by bringing a negatively charged rubber rod near the bulb. If the bulb end of the electroscope acquires a net charge of +3.00 , how many electrons a
Two charged spheres are 5.27cm apart. They are moved, and the force on each of them is found to have been tripled How far apart are they now?
Consider a particle with initial velocity u that has a magnitude 12.0 m/s and is directed 60.0 degrees above the negative x axis. how long Tg does it take for the balls to reach the ground? use 10.0
An airplane pilot wishes to fly directly westward. According to the weather bureau, a wind of 75.0 Km/h is blowing southward. The speed of the plane relative to the air (called the air speed) as mea
An airplane is dropping bales of hay to cattle stranded in a blizzard on the Great Plains. The pilot releases the bales at 180m above the level ground when the plane is flying at 70.0m/s 60.0 above