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You are standing 4.5m from a convex security mirror in a store. You estimate the height of your image to be half of your actual height.
Estimate the radius of curvature of the mirror. Follow the sign conventions.
A human can be electrocuted if a current of 0.053 A passes near the heart. If a human is considered to be a resistor in a circuit with a resistance of 2039 ?,
determine the resultant displacement graphically.what is the magnitude of repulsive force pushing these two spheres apart.
When a diver jumps into the ocean, water leaks into the gap region between the diver's skin and her wetsuit, estimate how much energy (in units of candy bars = 300 kcal) is required by this heating process
A toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of 1.03m/s in a horizontal circle. If the angle the string makes with the vertical is 27°, and the tension of the string is 1N.
A sinusoidal transverse wave travels along a long stretched string. The amplitude of this wave is 0.0859 m, its frequency is 2.41 Hz, What is the shortest transverse distance between a maximum and a minimum of the wave
The space shuttle releases a satellite into a circular orbit 700 km above the Earth, How fast must the shuttle be moving (relative to Earth's center) when the release occurs
A frictionless block of mass 1.95 is attached to an ideal spring with force constant 340 . At the spring is neither stretched nor compressed and the block is moving in negative direction at a speed of 12.6.
What is the length of the shadow cast on the vertical screen by your 9 cm hand if it is held at an angle of 20 above horizontal.
Estimate the initial speed of that car assuming a level road.What would be the equilibrium temperature when a 252 block of copper at 275 is placed in a 136 aluminum calorimeter cup containing 807 of water at 14.90.
A non-isotropic two-dimensional solid has a coefficient of linear expansion alone one axis equation to A and along a perpendicular axis equation to B
An proton (m = 1.67 ´ 10-27 kg and q = 1.6 ´ 10-19 C) travelling at 2.7 × 105 ms-1 enters a magnetic field of 1.2 T at right angles to the direction of motion of the electron. What is the centripetal force on proton.
While a woman stands with two feet on a scale, the scale reads 490 N. When she lifts one foot, scale reads more or less.
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