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An astronaut on the planet Zircon tosses a rock horizontally with a speed of 6.95 m/s. The rock falls through a vertical distance of 1.40 m and lands a horizontal distance of 8.75 m from the astrona
Assume the magnitude of the acceleration is the same during starting and stopping. Determine the magnitude of acceleration of the elevator.
Determine the power required to maintain the clean room's temperature by a reversible refrigeration cycle operating between cold and hot reservoirs at 55oF and 80oF, respectively, and the correspo
A 36 kg block slides with an initial speed of 8 m/s up a ramp inclined at an angle of 15o with the horizontal. The coefficient of kinetic friction between the block and the ramp is 0.8. Use energy c
A 1200-turn coil of wire that is 2.3 cm in diameter is in a magnetic field that drops from 0.12 T to 0 in 9.0 ms. The axis of the coil is parallel to the field. What is the emf of the coil?
A plane ,driving at an angle of φ with the vertical, releases a projectile at an altitude of 730m. The projectile hits the ground 5.0s after it was released, having travelld a horizontal distan
The spheres are given identical charges and the midpoint of the thread is then suspended form a point on the ceiling. The spheres come to rest in equilibrium, with their centres 15cm apart. What is
Find the coefficient of kinetic friction µk between the backpack and the elevator floor. (Use any variable or symbol stated above along with the following as necessary: g.)
A rocket-powered hockey puck has a thrust of 2.70 N and a total mass of 2.30 kg. It is released from rest on a frictionless table, 2.50 m from the edge of a 2.10 m drop. The front of the rocket is p
A 1.0m length of straight wire carries a current of 21 A in a uniform magnetic field of 60 mT whose direction is at an angle of 39 degrees from the direction of the current. Find the force on the wi
A meteorologist for a TV station is using radar to determine the distance to a cloud. He notes that a time of 0.28ms elapses between the sending and the return of a radar pulse.
What force causes the centripetal acceleration when the coin is stationary relative to the turntable? What is the coefficient of static friction between coin and turntable?
Assuming that the wire has a resistance of 2.1ohms, over what period of time did the flux increase? If the current had been only 18A , how long would the flux increase have taken?
Given that the capacitance of the pacemaker is 110 µF and that the battery has a voltage of 9.0 V, what value should the resistance have?
The resistivity of the material of a wire is 1.76 × 10-8 Om. If the diameter of the wire is 2 × 10-3 m and its length is 2 m, what is its resistance?
What is the flux through the loop's plane if it is at an angle of 36 degrees to the field? What is the flux through the loop's plane if it is perpendicular to the field?
A block with a mass of 325g is connected to a spring (k= 488 N/m) and oscillates back and forth on a very smooth surface. If the mass is released from rest at x= 8.50 cm find: a) the force acting on
Air enters an adiabatic compressor at 100 kPa and 17°C at a rate of 2.4 m3/s, and it exits at 257°C. The compressor has an isentropic efficiency of 84 percent. Neglecting the changes in kine
How long does it take the proton to complete the quarter circle? Find the net force (magnitude) on a proton while it is in the field.
What is the direction of the first ball after the collision? Give the direction as an angle south of east.
One section, having a mass of 4.80×105 kg, is blown straight backward with a speed of 1.80×106 m/s. A second piece, with mass 8.10×105 kg, continues forward at 1.30×106 m/s. Wh
The cold reservoir for this plant is a pool of water constantly fed with ice from a glacier. If the plant produces 100 MW of electrical energy, what is the rate at which ice is melted?
What is the maximum electric power that could be produced by the plant if it boils the entire creek dry?
A 3-g bullet flying at 420 m/s hits a 2.2-kg aluminum block and embeds itself in the aluminum. After everything has come to equilibrium, how much has the entropy of the aluminum block increased? Be