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A 0.2 kg conductor of length 0.8 m carries 2 ampere current to the right in a magnetic field. What is the magnitude and the direction of the magnetic field acting on the conductor if the net force on the rod is zero? (Assume that the rod is hung by two insulating supports.)
A 49 kg woman leaps vertically from a crouching position in whichher center of mass is 36 cm above the ground. As her feet leave the floor her center of mass is 72 cm above the ground; it rises to 113cm at the top of her leap.
Consider the video tutorial you just watched. Suppose that we repeat the experiment, but this time we replace the original 56- magnet with a more powerful magnet of the same mass.
An object is 30.0 cm to the left of a converging lens whose focal length is 50.0 cm. Draw a ray diagram to scale and from it determine the image distance and the magnification.
suppose that we could use the energy released when 5 g of antimatter annihilates 5g of matter to lift a mass 3 km from the Earth's surface. how much mass can we lift? answer in unites of kg.
What would be the magnification of a telescope having an object lens of focal length 50 cm and an eyepiece of focal legth 10 cm
A pair of flat mirrors meet to form a right angle. A beam of light is incident on one of them at a point 11.5 cm from their point of intersection, what is the angle of incidence at the first mirror
A thin cylindrical shell of infinite length and radius 2.60-cm hasa uniform surface charge density of 6.89-nC/m2. What is the magnitude of the electric field at a distance of 5.79-cm from the cylindrical shell?
1. a merry-go-round spins without friction. the merry-go-round is a circular disk of mass m and radius r and that it is
A 12.00 kg block on a horizontal frictionless surface is attached to a light spring (force constant = 0.80 kN/m). The block is originally at rest at its equilibrium position when a force (magnitude P = 80 N) acting parallel to surface is applied t..
An airplane is cruising at an altitude of 10 km. The pressure outside the craft is 0.311 atm; within the passenger compartment, the pressure is 1.01 atm and the temperature is 20°C. A small leak occurs in one of the window seals in the passenger c..
A step-down transformer has a turns ratio of 1:10, and its primary is connected across the terminals of a standard 120-V wall socket. What power P is dissipated in the resistor
The moon is 1.5 x 108 km from the sun’s center and 3.9 x 105 km from Earth’s center. If the masses of the moon, Earth, and the sun are 7.3 x 1022 kg, 6.0 x 1024 kg, and 2.0 x 1030 kg, respectively, discover the ratio of the gravitational forces exert..
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