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The 1400 turn coil in a dc motor has an area per turn of 1.1 multiplied by 10-2 m2. The design for the motor specifies that the magnitude of the maximum torque is 5.8 N·m when the coil is placed in a 0.21 T magnetic field. What is the current in the coil?
illustrate what is the magnitude of the acceleration of the box and hanging mass?
A mass of 0.25 kg is attached to a horizontal spring with a spring constant of 4.0 N/m. Write an expression for the position of the mass as a function of time
q1. a persons heart and head are 1.2m and 1.7m above the feet respectively. find out the potential energy associated
A simple pendulum of length of 0.350 m starts from rest at a maximum displacement of 10 degrees from the equilibrium position. When will the pendulum return to its starting position
A 2.10-kg block is suspended from a spring with a spring constant of 480.0 N/m. What fraction of the original kinetic energy of the bullet appears as mechanical energy in the system of block-spring-bullet
Suppose one night that the radius of the earth decreased by two (was half as big as normal), What would be the new value for the free fall acceleration
A child throws a stone from the top of a 15 m cliff with a speed of 20 m/s. find its kinetic energy and speed when it lands on the ground
A car battery stores about 3.00 MJ of energy. If all this energy were used to generate a uniform electric field of 27.0 kV/m, what volume would it occupy.
A hot-air balloon is accelerating upward under the influence of two forces, its weight and the buoyant force. What is the acceleration of the rising balloon
A tennis player tosses a tennis ball straight up and then catches it after 3.40 s at the same height as the point of release. What is the maximum height (in m) the ball reaches
A sled weighing 52.0 N is pulledhorizontally across snow so that the coefficient of kineticfriction between sled and snow is 0.100. A penguin weighing72.0 N rides on the sled, as in the figure below.
Explain the relationship between the tilt of the Earth’s axis and the fact that we have seasons and the seasonal variation in the length of the day. What would happen to the seasons and the day length of the 23.5° tilt were reduced to 0°?
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