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A horizontal 790-N merry-go-round of radius 1.50 m is started from rest by a constant horizontal force of 50 N applied tangentially to the merry-go-round. Find the kinetic energy of the merry-go-ro
An airplane is flying in a horizontal circle at a speed of 135 m/s. The 99.6-kg pilot does not want her radial acceleration to exceed 5.83g. (a) What is the minimum radius of the circular path? (b)
A pebble is dropped in a lake; and it produces ripples with a frequency of 0.25 Hz. When should a second pebble be dropped at the same place to produce destructive interference?
Determine the mass of Earth from the period T and the radius r of the Moon's orbit about the Earth. T=27.3 days and r=3.82E5 km. Assume the Moon orbits the center of Earth rather than the center of
In one second the rod moves around the circular arc whose length equals the length of the rod. Find the angle of the rod to the vertical axis.
Find the magnitude of the impulse delivered to the particle. Express your answer in terms of and . Use three significant figures in the numerical coefficient.
A car at 10 mph goes around a curve whose arc has a radius of 0.2 miles (1056 ft.) Calculate the magnitude of the accerlation.
Then it decelerates at 2.00 X 10^-3 rad/s^2, until it slows (without reversing direction) to an angular speed of 5.00 rad/s. Find the total angular displacement of the propeller.
A capacitor is discharged through a 50.0 ohm resistor. The discharge current decreases to 21.0% of its initial value in 2.10 ms. What is the value of the capacitor?
As the station rotates, an astronaut in chamber A is moving 2.40X10^2m along a circular arc. How far along a circular arc can astronaut in chamber B moved during this same time?
An aircraft has a mass of 4.0 × 104 kg and is in steady level flight. The area of each wing is 25 m2 and the speed of the air just below the wing is 280 m s-1. Calculate the speed of the air
While the particle makes the transition from the state n-1 to the state n-2, radiation of wavelength 147nm is emitted. The ground-state energy of the particle is 1.2eV. Determine n.
Laser light at 635 falls on a double-slit apparatus with slit separation 6.9. Find the separation between the third and fourth bright fringes, as seen on a screen 1.4 from the slits.
The vertically hanging mass is 4.00 kg and the mass on the incline is 6.00 kg. The acceleration of the 4.00-kg mass is (the initial velocity of the 6.00-kg mass is up the incline)?
A 3.0A current is at right angles to a 0.55T magnetic field. The wire carrying the current is 1.0m long. How strong is the force that acts on the wire?
A charge moves a distance of 1.0 cm in the direction of a uniform electric field having a magnitude of 239 N/C. The electrical potential energy of the charge decreases by 61.2329 × 10-19 J as
Knowing that in the position shown the rod has an angular velocity of 4 rad/s clockwise, determine the angular velocity of the rod after it has rotated through (a) 90 degrees, (b) 180 degrees.
When the generator frequency is set to 160 Hz, the rms voltage across the inductor is 1.9 V. Determine the resistance of the resistor in this circuit.
Determine the gravitational force of attraction between a small cargo ship (5.00 x 10^4 kg) and a supertanker (1.50 x 10^6 kg) that is 500m away
A 36.4 kg child starting from rest slides down a water slide with a vertical height of 20.7 m. (Neglect friction.) What is the child's speed three-quarters of the way down?
Suppose two clouds containing equal numbers of electrons are separated by a distance of 2.4x1022m. If the magnitude of the electric force between the clouds is 1.0N, what is the charge of each cloud
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 55.0 degrees. Dog A exerts a force of 270 N and dog B exerts a force of 350 N. Find the magnitude of the result
The frequency is tripled, so that the reactances of the inductor and capacitor are no longer equal. What are the new reactances of (c) the inductor and (d) the capacitor?
When the emf for the primary of a transformer is of amplitude 6.00 V, the secondary emf is 48.0 V in amplitude. What is the transformer turns ratio (N2/N1)?
Suppose the second capacitor had been added in parallel with the first one, instead of in series. By what factor would the current delivered by the generator have increased?