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a hockey puck is sliding across the ice at 100 ms a playerrsquos stick momentarily comes in contact with the puck and
two protons are moving directly toward one another when they arevery far apart their initial speeds are 14 x 105mswhat
youre designing a toy rocket to be launched by a spring the launching apparatus has room for a spring that can be
an electromagnetic wave strikes a 169-cm2 section of wall perpendicularly the rms value of the waves magnetic field
a magnetic dipole with a dipole moment of magnitude 00205 jt isreleased from rest in a uniform magnetic field of
a block with a mass of 0700 kg is dropped from a heightd above a spring which has a spring constant of 400 nmthe block
consider a block of mass m sliding down an inclined plane andit has three forces acting on it 1 a gravitational
a 170 km long high-voltage transmissionline 20 cm in diameter carries a steady current of 950 a if the conductor is
a cyclotron designed to accelerate protons has an outer radius of0330 m the protons are emitted nearly at rest from a
driving home from school you spot a ball rolling out into the street you brake for 120 s slowing your 950 kg car from
a house has a floor area of 200 m2 and an outsidewall that has an area of 500 m2 the earths magneticfield here has a
a 350 kg block on a smooth tabletop is attached by a string to ahanging block of mass 28 k the blocks are released from
an electron moves in a circular path perpendicular to a constantmagnetic field with a magnitude of 500 mt the angular
a cylinder containing an ideal gas has a volume of 20m3 and a pressure of 10 x 105 pa at a temperature of 300k the
two vectors have magnitudes of 10m and 15m the angle between them when they are drawn with their tails at the same
a system is acte on by its suroundings in such as way that is receives 50 j of heat while doing 20 j of work what is
the current in a single-loop circuit with one resistance ris 70 a when an additionalresistance of 30 is insertedin
a solar cell generates a potential difference of 010 v when a450 resistor is connected across it and a potential
the maximum induced emf in a generator rotating at230 rpm is 40 vhow fast must the rotor of the generatorrotate if it
two objects hang on a pulley from the ceiling mass 1 is 3kg andis resting on the floor while mass 25kg is hanging in
when a cars starter is in use it draws a large current the carslights draw much less current as a certain car is
a parallel-plate capacitor has a voltage v 60 v between itsplates each plate carries a surface charge density sigma
a capacitor is discharged through a 20 omega resistor the dischargecurrent decreases to 23 of its initial valuein 19 ms
a 285-kg stunt boat is driven on the surface of a lake at aconstant speed of 135 ms toward a ramp which is angled
the drawing shows a version of the loop-the-loop trick for a small car if the car is given an initial speed of 32 ms