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John and Joan walk in opposite directions around a circular path, starting from the same point. The path has a radius of 50.0 meters. John walks at 1.00 m/s, Joan at 1.25 m/s. How long will it take for them to meet?
At a certain instant, the earth, moon, and a stationary 1500-kg spacecraft are at the vertices of an equilateral triangle of length 3.84 × 108 m. What is the magnitude of the net gravitational force acting on the spacecraft
A person with perfect pitch sits on a bus bench listening to the 441-Hz horn of an approaching car. If the person detects a frequency of 479 -Hz, how fast is the car moving.
A conducting sphere with an inner insulating sphere inside of it, carries a total charge of 5 nC. The charge within the inner insulating sphere is -5 nC, find the charge on the outer surface of the conducting shell
A wheel of radius .1m and mass of 20kg rotates at 100rpm. what constant angular acceleration must be applied to the wheel
Find the flow rate of sludge and thickened sludge, salt concentration, water flow rate and pumping rate of a reservoir.
A lens system consists of two lenses 48.5 cm apart. The first lens is convex (converging) and has a focal length of 25.22 cm. What is the focal length of the second lens
Wishing to move his television set to another room, the owner extends the aerial feeder cable, calculate the size of the signal transmitted across the join to the second cable
A car starts from rest and travels for 8.0 s with a uniform acceleration of +2.4 m/s2. How fast is the car going at the end of the braking period
Two objects attract each other gravitationally with a force of 2.3×10-10 when they are 0.65 apart. Their total mass is 5.0 . Find out their individual masses.
A conical pendulum is formed by attaching a 41.0 g mass to a 1.3 m string. The mass swings around a horizontal circle of radius 32.0 cm. What is the tension in the string
A 0.954-kg toy car is powered by three D cells (4.50 V total) connected directly to a small DC motor. What is the average current supplied to the car\'s motor
question1a bank robber travelling at 75 mihr in an escape car suddenly sees a barricade 150 meters ahead. the robber
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