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A toroidal solenoid has a mean radius of 0..210 m, a cross-sectional area of 2.00 * 10^-3 m and 631 turns. What current is required to produce a stored energy of 0.0300J?
Monochromatic 494.2 nm is incident on a diffraction grating containing 4060 lines per centimeter. Find the angle of the first order maximum.
Charge q2=2.5nC is 300cm and charge q3= 3.0 nC and is 250cm. What is the total force exerted by this charges on the charge q0=4.0nC located on the origin?
A car is traveling 23 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 6.5 m/s2. How far does the car go before it stops?
A rocket is launched at an angle of 60.0° above the horizontal with an initial speed of 105 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 29.0 m/s2. A
The proton has a speed of 3.5 x 10^6 ms-1 and at x=80cm, its speed is zero. Find the magnitude and direction of electric field intensity.
The rms value of the wave's magnetic field is determined to be 5.60 10-4 T. How long does it take for the wave to deliver 1400 J of energy to the wall?
A car crashes into a wall at 45 m/s and is brought to rest in 0.1 s. Calculate the average force exerted on a 80 kg test dummy by the seat belt.
During a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 210 J from 440J. How high does she rise during this interval? Neglect air resistance?
Two 1.1 kg masses are 1.5 m apart (center to center) on a frictionless table. Each has + 9.7 mu C of charge. what is the magnitude of one of the masses ?
A woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at a constant speed. what can you said about the force applied?
a .100 kg meterstick is supported at its 40.0 cm mark by a string attached to the ceiling. A .700 kg mass hangs vertically from the 5.00 cm mark. A mass is attached at another mark to keep it horizo
A stone with a mass of 0.90 kg is attached to one end of a string 0.80 m long. The string will break if its tension exceeds 500 N. The stone is whirled in a horizontal circle on a frictionless table
1 lightyear (ly) is the distance light travels in 1 year moving at 3 x 108 m/s. How long does the journey take according to the astronaut?
An underwater diver sees the sun 55 degrees above horizontal. How high is the sun above the horizon to a fisherman in a boat above the diver?
A projectile is fired straight upward at 141 m s. How fast is it moving at the instant it reaches the top of its trajectory?
What are the magnitude of (a)the angular velocity (b) the radial acceleration and (c)the tangential acceleration of a spaceship taking a circular turn of radius 3220 km at a speed of 29000km/h.
A 22 kg loudspeaker is suspended 2.4 m below the ceiling by two 3.0 m long cables that angle outward at equal angles. What is the tension in the cables?
A 1.20 brick is sliding along on a rough horizontal surface at 15.0 .If the brick stops in 4.30 , how much mechanical energy is lost?
After the police car passes, the observed frequency of the siren is 472 Hz. Determine the car's speed from these observations. The speed of sound in air is 343 m/s.
A 1300 N crate slides 14 m down ramp that makes an angle of 30 degree with the horizontal. If the crate slides at a constant speed, how much thermal energy is created?
How many kilograms of water at 25 degrees celsius must come to thermal equilibrium with a 3 kilogram gold bar at 99 degrees celsius in order to lower the bar's temperature to 47 degrees celsius?
A charge of 2.65 is held fixed at the origin. A second charge of 2.65 is released from rest at the position. At what distance from the origin does the second charge attain half the speed it will have
An 8.00 g bullet is fired into a 250 g block that is initially at rest at the edge of a table of 1.00 m height. The bullet remains in the block, and after the impact the block lands d = 1.7 m from t
In a physics laboratory experiment, a 6.00kg boox is pushed across a flat table by a horizontal force F. a.) if the box is moving at a constant speed of 0.35m/s and the coefficient of kinetic fricti