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An electromagnet is made by winding insulated copper wire on an iron core. State two changes that could be made to increase the strength of the electromagnet.
A kicker punts a football from the very center of the field to the sideline 36 yards downfield. What is the direction of the net displacement of the ball
Calculate the maximum electric potential it can reach before the surrounding air breaks down because of the electric field near the surface of the dome
A 27.0-kg child on a 3.00-m-long swing is released from rest when the ropes of the swing make an angle of 35.0° with the vertical, Neglecting friction, find the child's speed at the lowest position
An electron is accelerated through 2,400 V from rest and then enters a region where there is a uniform 1.70 T magnetic field. What is the maximum magnetic force this charge can experience?
question a 6 microc charge is found to move against a 9 kv potential difference. if the charge moves along an electric
The length of a steel bar increases by 0.039 % when itstemperature is increased from 0o C to 35o C. Calculate the temperature coefficient of linear expansion for thisbar. (Round the answer to three significant figures.)
How far upward does the flea move while it is pushing off
The locomotive is moving at 25 km/h. The engineer of the high speed train immediately applies the brakes. What must be the magnitude of the resulting constant deceleration if a collision is to be just avoided.
A harmonic on a string1.3 m long has a frequency of 15.6 Hz. The next higher frequency is 23.4 Hz. Both ends ofthe string are fixed. What is the fundamental frequency
An arrow is launched from a height of 1.21 m above the ground with an initial speed of 48.3 m/s and an initial angle of 35o above the horizontal. What will be the maximum height the arrow will reach
A circular loop carrying a current of 1.0A is oriented in a magnetic field of 0.35 T. What is the torque on the loop when its plane is oriented at a 25 degree angle to the field
The electric field midway between two equal but opposite point charges is 745 N/C, What is the magnitude of the charge on each
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