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The earth mac field is 5*10^-5T. an electron of 3*10^4 eV cosmic ray is moving in a plane which is perpendicular to the lines of the earth mag. field. calculate the speed of the electron to determin
A 0.135 kg projectile is fired with a velocity of +711 m/s at a 1.82 kg wooden block that rests on a frictionless table. The velocity of the block, immediately after the projectile passes through it
Assume that the transmission of the van is in neutral, the brakes are not being applied, and the collision is elastic. What is the final velocity of the car?
Two balls are approaching each other head-on. Their velocities are +9.86 and -11.9 m/s. Determine the velocity of the center of mass of the two balls if they have the same mass.
calculate the total work done by friction and air resistance during the run. The skier's mass is 73.6 kg.
The characteristic direction of the first is at angle ø with respect to the initial beam. Find angle ø for a transmitted beam intensity that is 0.10 times the incident beam intensity.
A 0.75-mW laser emits a narrow beam of light that enters the eye, as shown in the figure.
The time it takes for sound waves to travel at 343 m/s through the air between the astronauts equals the time it takes for the electro- magnetic waves to travel to the earth. How far away from the e
How many turns should a solenoid of cross-sectional area 0.035 m2 and length 0.39 m have if its inductance is to be 48 mH?
The ends of the wire are attached to opposite ends of a diagonal of the rectangle. A vertical magnetic field of 0.50T is present. What magnetic force acts on this segment wire?
A flywheel within large water pump is a solid disk with mass 21 kg and a radius of 0.45 m. Starting from rest it begins to rotate with a constant acceleration of 2.4 rad/sec2 for 5.1 sec after whic
A hollow, spherical shell with mass 1.55 kg rolls without slipping down a slope angled at 39.0. Find the minimum coefficient of friction needed to prevent slipping.
When equilibrium is reached, the nut is sitting in a small pool of water from the melted ice. How much water is there? Assume no heat enters or leaves the system.
A 4400 kg open railroad car coasts along with a constant speed of 5.30m/s on a level track. Snow begins to fall vertically and fills the car at a rate of 5.40 kg/min Ignoring friction with the track
A laser beam passes through a converging lens with a focal length of 19cm... At what distance past the lens has the laser beam's intensity increased by a factor of 6? At what distance past the lens
A laser beam passes through a converging lens with a focal length of 19 cm At what distance past the lens has the laser beam's intensity increased by a factor of 6? At what distance past the lens ha
(a) Determine the total torque due to the weight of these hands aboutnthenaxis of rotation when thentimemreads (i) 3:00, (ii) 5:15, (iii) 6:00, (iv) 8:20, and (v) 9:45. (Hands are modeled as long, t
What would have been the angular displacement of the engine if its angular velocity had remained constant at the initial value of +190 rad/s during the entire 13.0-s interval?
Find the current in the coil if the maximum torque exerted on it by the magnetic field is 0.18 N · m.
A 194-kg satellite is in circular orbit around the Earth and moving at a speed of 5.14 km/s. How much work must be done to move the satellite into another circular orbit that is twice as high above
A fire helicopter carries a 660-kg bucket of water at the end of a 20.0-m long cable. Flying back from a fire at a constant speed of 40.0 m/s, the cable makes an angle of 38.0° with respect to t
After the block is released from rest, it travels upward and then leaves the spring. To what maximum height above the point of release does it rise? (Round your answer to two decimal places.)
Determine the energy of the incident electron. (Use any variable or symbol stated above along with the following as necessary: me for the mass of elecron and e for the electron's charge.)
What is the magnitude of the impulse that the bat delivers to the ball? What is the direction of the impulse that the bat delivers to the ball?
first find the moment of inertia of the bar about an axis perpendicular to the plane and passing through the center of mass of the bar.