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A long wire which is coaxial with the cylinder carries an equal current in the same direction. What is the magnitude of the magnetic field 3.0 mm from the axis?
Two vertical, long, straight wires each carry a current of 5.40 A in the upward direction and are separated by 18.4 cm. Find the resultant magnetic field at a point P midway between the wires.
a meteor whose mass was about 1.9*10^8 kg struck earth (mE=6.0*10^54 kg) with a speed of about 19 km/s and came to rest in the earth what is the earth's recoil speed?what fraction of the meteor's ki
A height of 4m above the ground. if the arrow is relased from a height of 1m above the ground and hits the apple .50s later, what is the arrow's initial velocity?
A ranger in a national park is driving at 49 km/h when a deer jumps onto the road 66 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of
a 10 meter long vine that is at 53o with the vertical and swings off the branch. What is the tension in the vine when it makes an angle of 30o with the vertical?
Susan's 11.0 baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled above the floor. The tension is a constant 29.0 and the coefficient of friction is 0.20
A 1.52 wide, 1.50 high, 1500 car hits a very slick patch of ice while going 21.0 .If friction is neglected, how long will it take until the car's speed drops to 14.0 ?
Then the bar is dropped. What is the terminal speed at which the bar falls? Assume the bar remains horizontal and in contact with the rods at all times.
A 39.0 kg child swings in a swing supported by two chains, each 2.91 m long. (a) If the tension in each chain at the lowest point is 356 N, find the child's speed at the lowest point.
on a hot day in Las Vegas, an oil trucker loaded 37000 liters of diesel fuel. he encountered cold weather conditions on the way to Payson, Utah when the temperature was 23 kelvin lower than in Las V
The tension is provided by a 44.5-N block that is hanging from the string. Determine the speed of the wave in part (a) and part (b) of the drawing.
A 29.0 g object moving to the right at 16.0 cm/s overtakes and collides elastically with a 7.0 g object moving in the same direction at 15.0 cm/s. Find the velocity of each object after the collisio
If the specifc heat capacity of tin is 230 J/kg times degrees celsuis, what is the final equilibruim temperature of the tin-water mixture?
The temperature of the rod is slowly increased. When the wax melts, the block slides out to the end of the rod. What is the final angular velocity? Give your answer in rpm.
A 2.8 kg bucket of water is raised from a well by a rope. the acceleration of gravity is 9.8 m/s/s. if the upward acceleration of the bucket is 5.2 m/s/s, find the force exerted by the rope on the b
A 2.0 2.0 parallel-plate capacitor has a 1.0 spacing. The electric field strength inside the capacitor is 1.1×105 . What is the potential difference across the capacitor?
A bowling ball encounters a 0.76 m vertical rise on the way back to the ball rack, as the drawing illustrates. Ignore frictional losses and assume that the mass of the ball is distributed uniformly
A boy shoots a BB gun horizontally at a target 15 m away. The gun is aimed directly at the center of the target, but the small metal BB hits 56 cm lower. Neglecting any air resistance, what was the
A 240-N child is in a swing that is attached to ropes 1.90 m long. Find the gravitational potential energy associated with the child relative to her lowest position at the following times.
The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the cell?
One method of determining the refractive index of a transparent solid is to measure the critical angle when the solid is in air. If θc is found to be 41.3°, what is the index of refraction
Treat this problem as though the object and image lie along a straight line. Use ray tracing to decide whether a concave or convex mirror is needed, and to estimate the focal length.
Neglect the effects of air resistance and assume the ramp is frictionless. What is the maximum height h of his jump above the end of the ramp?
A major-league pitcher can throw a ball in excess of 43.0 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches a catcher who is 17.0 m away from the poi