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A child slides down a snow covered slope that makes an angleof 20 degrees with the horizontal. If the coefficient of kineticfriction is .085, what is the child's acceleration? At whatangle would the child slide with constant speed?
A 1400 kg car enters a passing zone and accelerates from70km/h to 95 km/h to pass a slower car. How much work must be done on the car? If the car then brakes to a stop, how much work is doneon it?
A water storage tower, is filled with freshwater to a depth of 6.4m. It has a circular basin with and Are of 30m^2. What is the weight(force) of water the basin supports
The drawing shows three different resistors in two different circuits. The battery has a voltage of V = 27 V, and the resistors have resistances of R1 = 50.0 ?, R2 = 25.0 ? and R3 = 10.0 ?. What is the total power supplied to the two resistors
A gas in an engine undergoes a reversible cycle in which 152 Joules of work are done and 419 Joules of heat are supplied by the fuel. what would the high temperature be
A solenoid is made by wrapping a wire so that it makes a solenoid (coil) having 500 turns of diameter 8.00 cm and length 40.0 cm. Find the inductance of this solenoid
Two electrons, both with speed 1.0x10^4 m/s, are shot into a uniform magnetic field. The first is shot from the origin out along the + x-axis, compute the magnitude and direction of the magnetic field
A neutron star is the remnant left after certain supernovae (explosions of giant stars). What is a typical neutron star density in g/cm3
A proton is fired from far away toward the nucleus of a mercury atom. Mercury is element number 80, and the diameter of the nucleus is 14.0, what is its closest approach to the surface of the nucleus
A blimp is initially at rest, hovering, when at t = 0 the pilot turns on the motor of the propeller. The motor cannot instantly get the propeller going, but the propeller speeds up steadily. The steadily increasing force between the airand the pro..
A solid disk of radius 7.50 cm and mass 1.25 kg, which is rolling at a speed of 1.50m/s , How long will it take for the disk to come to a stop
A conventional mercury thermometer consists of a thin glass capillary filled with mercury. The capillary is enclosed in a protective glass cylinder. These mercury thermometer can be quite sensitive and very precise.
The force on a magnetic moment µz in a nonuniform magnetic field Bz is given by Fz = µz(dBz/dz). If a beam of silver atoms travels a horizontal distance of 1.00 m through such a field and each atom has a speed of 142 m/s, how strong must be the field..
a grindstone used to sharpen tools is rotating at an angular speed fo 8 rads when an axe is pressed against it. because
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