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An electromagnetic wave of intensity 240 W/m2 is incident normally on a rectangular card with sides of 19 cm and 31 cm that reflects the entire radiation incident on it. Discover the force exerted by the electromagnetic wave on the card if the radiation is incident at an angle of 30° to the normal.
At the Earth's surface a projectile is launched straight up at a speed of 8.4 km/s. To what height will it rise
C harged particle(m=6 g,q=-10x10-6 q)moves in a region of uniform field along a helical path (radius = 2.0 cm, pitch = 7.0 cm) as shown. Identify the angle between the velocity of the particle and the magnetic field?
a spring with a spring constant k is hung vertically. a mass m is attached to it and released in such a way that the
A caterpillar climbs up a one-meter wall. For every 3 cm it climbs up, it slides down 1 cm. It takes 10 minutes for the caterpillar to climb to the top. Compute the speed at which the caterpillar travels.
If you are driving 108 km/h alonga straight road and you look to the side for 1.0 s, how far do you travel during this in attentive period
At the beginning of a new school term, a student moves a box of blocks by attaching a rope to the box and pulling with a force of F= 84.9N at an angle of 65 degrees, as shown in the figure. The acceleration of gravity is 9.8 m/s2.
A 68 kg person sits on a 4.0 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.2 cm in diameter . Find the pressure exerted on the floor by each leg of the chair, assume the weight is evenly distributed.
A tire placed on a balancing machine in a service station startsfrom rest and turns through 5.5 revs in1.2 s before reaching its final angularspeed. calculate the wheel's angular acceleration
A component with a 20 Ohm resistor is rated for use at power levels not exceeding 2,282 mW. How much current can safely flow through the component
One end of a wire is attached to a ceiling, and a solid brass ball is tied to the lower end. The tension in the wire is 140 N. What is the radius of the brass ball
If a boat and its riders have a mass of 1500kg and the boat drifts in at 1.4m/s how much work does Sam do to stop it
four identical metal spheres have charges of qa -8.0 microc qb-2.0 microc qc5.0 microc and qd12.0 microc.a two of the
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