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Q1. Two point charges, q1 = -10.0 nC and q2 = +20.0 nC, are 15 cm apart on the x-axis. What is an electric potential at the point on the x-axis where electric field is zero?
Q2. A proton with a kinetic energy of 3.7 × 10-16 J moves perpendicular to a magnetic field of 0.26 T. What is the radius of its circular path?
Q3. The speed of light in a transparent medium (such as glass) is less than the speed of light in a vacuum. Is this a violation of the theory of relativity?
The sun's mass is 1.99 x 10^30 kg, the earth's mass is 5.98 x 10^24 kg, and the moon's mass is 7.36 x 10^22 kg. The average distance between the moon and the earth is 3.82 x 10^8 m, and the average distance between the earth and the sun is 1.50 x ..
The plane of a 6.0 cm × 8.0 cm rectangular loop of wire is parallel to a 0.16-T magnetic field. The loop carries a current of 6.8 A, What torque acts on the loop
a 3 kg cart moves on an air track at 1.2 m/s. It collides with and sticks to another cart of mass 5 kg, What is the velocity of the combined cart after collision
Decide about the validity of Ampere's Law. Ampere's Law is valid.
A wooden block weighing 7 N is at rest on top of a wooden desk. The coefficient of static friction between the block, Find the minimum horizontal force required to move the block
Eratosthenes measured the circumference of the Earth by noting that the Sun is at an angle of 7°12' = 7.2° ("one-fiftieth of a circle") south of the vertical in Alexandria at the same time of day, What was Eratosthenes percent error
The mass of Pluto is 0.0025 times that of earth, and its radius is 0.180 times that of earth. Calculate the acceleration of gravity at the surface of Pluto
In a mass spectrometer the charged particles have to reach a common specific speed. To do so, they are accelerated with an electric field, determine the direction of the magnetic force
The force of the wind on the sails of a sailboat is 300 N north. The water exerts a force of 210 N east. If the boat (including crew) has a mass of 310 kg, illustrate what are the magnitude and direction of its acceleration?
A string is stretched between fixed supports separated by 75.0 cm. It is observed to have resonant frequencies of 288.0 and 384.0 Hz, What is the lowest resonant frequency for this string
During a golf drive, the angular velocity of the driver is 20 rad/s just before impact with the golf ball. If the distance from the club head to the axis of rotation is 2.0 m
A small, plastic sphere of mass m = 111 g is attached to a string There is an electric field of 122 N/C directed along the + x axis
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