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Find the radian measure of one of the angles of a regular pentagon. (The angles are all the same in a regular pentagon.) In degrees, the formula for the sum of the interior angles of an n-sided polygon is (n = 2) × 180°.
What is the focal length of this mirror. If the object is 25 cm in front of the mirror, what is the image distance.
A 240g block is attached to a horizontal spring and executes simple harmonic motion with a period of 0.150 s. If the total energy of the system is 3J.
An airplane starting from airport A flies 304 km east, then 364 km at 35.5° west of north, and then 150 km north to arrive at last at airport B.
A pulley 18 in diameter is free to rotate about the horizontal axle. A 220 mass and a 420 mass are tied to either end of a massless string, and string is hung over the pulley.
A 44 cm diameter loop is rotated in a uniform electric field until the position of maximum electric flux is found. The flux in this position is 5.40 x10^5 N·m2/C. What is the magnitude of the electric field.
A 15m uniform ladder weighing 500 N rests against a frictionless wall. The ladder makes 60 angles with the horizontal.
A supertanker with the mass of 4.67 × 10^8 kg is moving with a constant velocity. Its engines generate a forward thrust of 8.71 × 10^6 N.
A farsighted person has a near point of 50-cm from her eyes. She wants glasses that would let her see objects at a distance of only 25.00 cm from her eyes. Determine out the focal length of the glasses needed if the glasses are 2 cm and 3 cm from ..
A charge of -2.85 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass, which has a radius of 0.105 m.
An iron bolt of mass 63.4 g hangs from a string 32.6 cm long. The top end of the string is fixed. Without touching it, the magnet attracts the bolt so that it remains stationary, displaced horizontally 28.5 cm to the right from the before vertical li..
How to find the length
An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 145 km/h. exactly 2.5 s after the speeder passes, police officer steps on accelerator; if the police car's acceleration is 2.10m/s^2.
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