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Suppose that it takes 10.0 h to drain a container of 5700 m3 of water. What is the "mass flow rate," in kilograms per second, of water from the container?
A coil is placed in a changing magnetic field and an emf is induced. What happens to the induced emf if the rate of change of magnetic field quadruples?
The current in a solenoid with 22 turns per centimeter is 0.50 A. The solenoid has a radius of 1.5 cm. A long, straight wire runs along the axis of the solenoid, carrying a current of 23 A. Find the
Assume the radius of the ball is very small compared to other length scales in the problem. Take the starting level as step 0, the next step down as step 1, and so on
A loudspeaker at a rock concert generates 10-2 W/m2 at 18 m at a frequency of 1 kHz. Assume that the speaker spreads its energy uniformly in all directions. What is the intensity level at 18 m?
A projectile is shot from the edge of a cliff 285 m above ground level with an initial speed of vo=115 m/s at an angle of 35.0° with the horizontal. Find the maximum height above the cliff top r
A 34g bullet is traveling at 485m/s when it strikes a block of wood. If the block of wood exerts a force of 50,000 N opposing the motion of the bullet, how far will the bullet penetrate the block of
A magnetic field near the floor points down and is increasing. Looking down at the floor, does the non-Coulomb electric field curl clockwise or counter-clockwise?
If the speed of the electron were 3.6×105 , what would be the corresponding orbital radius? Given that with the current Bohr Model the force.
A charge -344e is uniformly spread through the volume of a sphere of radius 4.00 cm. What is the volume charge density in that sphere?
A wheel rotating with a constant angular acceleration turns through 21 revolutions during a 2s tiem interval. its angular velocity at teh end of this interval is 17 rad/s. what is the angular accel
A tennis ball of mass 57 g travels with velocity < 62, 0, 0 > m/s toward a wall. What is the change in the magnitude of the tennis ball's momentum?
What is the turntable's angular speed when the block reaches the outer edge?
How close to the goal can the hare let the tortoise approach before resuming the race, which the tortoise wins in a photo finish? Assume that, when moving, both animals move steadily at their respec
What is the kinetic energy of a 12 kg dog that is running at a speed of 7.4 m/s (about 17 mi/h)
A small turbo-prop commuter airplane, starting from rest on a Tallahassee airport runway, accelerates for 20.5 s before taking off. Calculate the acceleration of the plane, assuming it remains consta
The plates are separated by 6.00 cm. If the thread makes an angle of 17.0° with the vertical, what is the potential difference between the plates?
To increase the range of the water, Isabella places her thumb on the hose hole and partially covers it. Assuming that the flow remains steady, what fraction f of the cross-sectional area of the hose
If the magnitude of the field just outside the inner conductor is 660 N/C, what is the magnitude of the field just inside the outer conductor?
The burning of gasoline in a car releases about 3.0 × 10^4 kcal/gal. If a car averages 43 km/gal when driving 90 km/h, which requires 20 hp, what is the efficiency of the engine under those c
given by B=0.003i + 0.004j + 0.002k, where i, j, k are the unit vectors along the cartesian coordinate axes') in units of Tesla. Calculate the y-component of the magnetic force acting on a segment o
To go to a football stadium from your house, you first drive 830 m north, then 520 m west, and finally 1520 m south. What is the straight-line distance from your house to the stadium?
Velocity components of vx = 3800 m/s and vy = 4044 m/s. Find the magnitude and direction of the initial velocity. Express the direction as an angle with respect to the +x axis.
Two identically charged particles separated by a distance of 8.9 m repel each other with a force of 9.9 N. What is the magnitude of the charges?
An ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at +41 ft/s2. What is the final position of the sled when it comes to rest?