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A powerful bolt of lightning can carry a current of 230 kA. If two such bolts strike simultaneously at a distance of 36 m from each other, what is the magnetic force per meter exerted by one bolt o
Two cars each of mass 1300 kg are approaching each other on a head on collision course. Each speedometer read 19m/s. What is the magnitude of the total momentum of the system?
At a certain location, the horizontal component of the earth's magnetic field is 4.90 10-5 T, due north. A proton moves eastward with just the right speed, so the magnetic force on it balances its
What is the minimum coefficient of static friction necessary to allow a penny to rotate along with a 33 1/3-rpm record (diameter = 0.300 meters), when the penny is placed at the outer edge of the r
A balloon rises at at constant velocity of 3m/s. A rock is released over the side. 4.5 seconds later this rock hits the ground. Calculate the height of the rock when it is halfway between the ballo
A step-down transformer has 16000 turns on the primary and 95 turns on the secondary. If the rms emf across the secondary coil is 120 V, what is the maximum emf across the primary coil?
The magnitude of the electrostatic force on A due to B is 2.4 newtons. What is the magnitude of the electrostatic force on B due to A?
A 13 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 1.8 m/s2, find the force exerted by the rope on the bucket of water.
At a maximum level of loudness, the power output of a 75-piece orchestra radiated as sound is 70.0 W. What is the intensity of these sound waves to a listener who is sitting 25.0 m from the orchest
You are driving to the grocery store at 21.5 m/s. What acceleration will bring you to rest right at the intersection?
A solid disk of radius 1.6m and mass 2.3 kg rolls without slipping to the bottom of an inclined plane. If the angular velocity of the disk is 5.35rad/s at the bottom, what is the height of the incl
A satellite revolves around a planet at an altitude equal to the radius of the planet. The force of gravitational interaction between the satellite and the planet is F_0. Then the satellite moves to
A concave mirror with a radius of curvature of .79 m is illuminated by a candle located on the symmetry axis 2.79 m from the mirror. Where is the image of the candle?
A gold nucleus contains 197 nucleons packed tightly against each other. A single nucleon (proton or neutron) has a radius of about 1.310-15 m. Calculate the approximate radius of the gold nucleus. (
suppose a diffraction(multi-slit) grating is used instead of the two slits, and green(54 nm)laser shines through it onto the screen. what is the slit density of the grating?
a) What is the velocity of the second block after the bullet imbeds itself? (b) Find the ratio of the total kinetic energy after the collision to that before the collision.
When it reaches a height of 5.80 m, the velocity is v=4.24i+7.58j m/s. Determine the maximum height that the ball reaches. Determine the total horizontal distance travelled by the ball.
A screen that is 1.85 m away. What is the distance on the screen from the central bright fringe to the third dark fringe on either side?
From another measurement, you have found that the velocity of the jumper's center of mass has only a y component of v2=2.5 m/s as the jumper's feet leave the floor.
What is the ratio of the energy released by the fusion of 1.0kg of hydrogen to tht released by fission of 1.0kg of Uranium 235?
A 30-turn circular coil of wire has a diameter of 1.18 m. It is placed with its axis along the direction of Earth's magnetic field of 31.5 μT, and then in 0.317 s it is flipped 67 degrees. What
After the first spring compresses a distance of 33.0 cm, the second spring acts with the first to increase the force as additional compression occurs as shown in the graph. The car comes to rest 53.
A uniform electric field of magnitude 360 N/C pointing in the positive x-direction acts on an electron. What is the work done by the field on the electron?
6 A block of wood of mass 2 kg is suspended by long, light strings and is at rest. A bullet of mass 40 g, strikes and remains in the block, causing it to swing. The maximum height of the block above
A portion of which intersects the slopes surface in an arc AB. The radius of the imaginary circle is 27 meters. Determine the normal force acting on the skier at point A.