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A magnifying glass is a single convex lens with a focal point length of f= + 14 cm. What is the angular magnification when this lens forms a (virtual) image at - 8
The toroid has 900 turns of large diameter wire, each of which carries a current of 14.0 kA. Find the magnitude of the magnetic field inside the toroid along (a) the inner radius and (b) the outer r
The objective lens has a focal length of f1 = + 39 cm. Precisely 36 cm behind this lens is a concave lens with a focal length of f2= -10 cm. The object to be photograph is 4 m in front of the objec
A converging lens of focal length 8 cm is 20 cm to the left of a diverging lens of focal length - 6 cm. A coin is placed 12 cm to the left of the converging lens. Find the location and magnification
To completely fill a frame of 35 mm film, the image produced by a camera must be 36 mm high. If a camera has a focal length of 150mm, how far away must a 2m tall person stand to produce an image tha
A wheel rotates with a constant angular acceleration of 4.00 rad/s2. Assume the angular speed of the wheel is 2.30 rad/s at ti = 0. Find the angle through which the wheel rotates between t = 2.00 s an
A helicopter lifts a 72kg astronaut 15m vertically from the ocean (from rest) by means of a cable. The acceleration of the astronaut is g/8. a) How much work is done on the astronaut by the force fr
The image of the moon is formed by a concave mirror whose radius of curvature is 4.52 meters at a time when the moon's distance is 3.80x10^5 km. What is the diameter of the image if the diameter of
A river flows due east at 3.0 m/s. A boat crosses the 300 m-wide river by maintaining a constant velocity of 10 m/s due north relative to the water. If no correction is made for the current, how far
Find the peak magnetic field in an electromagnetic wave whose peak electric field is 240 N/C.
An RL series circuit has R = 79.0 Omega and L = 1.95 mH. The series combination is connected across a 170 V (rms), 59 Hz power supply. A Find the phase angle.?
The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W = 58300 N. The lift force generated by the rotating blade makes an angle o
A hockey puck moving at 8.0 m/s coasts to a halt in 75m on a smooth ice surface. What s the coefficient of friction of friction between the ice and the puck?
When an object is placed 57.0 from a certain converging lens, it forms a real image. When the object is moved to 38.0 from the lens, the image moves 14.0 farther from the lens. Find the focal length
A person pulls a toboggan for a distance of 30.0 m along the snow with a rope directed 20.0° above the snow. The tension in the rope is 86.0 N. (a) How much work is done on the toboggan by the ten
How does the maximum altitude of the projectile on the Moon compare with that of the projectile on the Earth?
A straight section of the wire is 0.750 m long and lies along the x axis within a uniform magnetic field of magnitude B = 1.90 T in the positive z direction. If the current is in the +x direction, w
A 0.200 kg metal rod carrying a current of 10.0 A glides on two horizontal rails 0.500 m apart. What vertical magnetic field is required to keep the rod moving at a constant speed if the coefficient
A 24-inch string is wrapped around the 1/8-inch radius axis of a yo-yo. Starting from rest, the yo-yo descends with a constant angular acceleration of 4 rad/s2.
If 8 percent of the power of a 100 W bulb is radiated in the visible spectrum, how many visibly photons are radiated per second?
A student skateboards down a ramp that is 6m long and inclined 18 degrees with respect to horizon. the intitial speed of skateboard at the top of ramp is 2.6m/s. Neglect friction and find the speed
Determine the magnitude of the average emf induced in the triangle ABC during the 6.0 s period after the rod has passed point.
A spring is hanging vertically from a ceiling. (Assume the spring's mass is negligbile). I hang a 0.5kg mass on the spring and let the spring slowly stretch to an euilibrium position. Then the sprin
Two blocks of masses m1 = 2.00 kg and m2 = 4.80 kg are released from rest at a height of h = 5.60 m on a frictionless track. When they meet on the level portion of the track, they undergo a head-on,
Calculate the escape velocity from Venus's exosphere, which begins about 200 kilometers above the surface.