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A 35.0-kg child swings in a swing supported by two chains, each 2.92 m long. The tension in each chain at the lowest point is 352 N.
(a) Find the child's speed at the lowest point.
_____ m/s
(b) Find the force exerted by the seat on the child at the lowest point. (Ignore the mass of the seat.)
_____N (upward)
A block of mass m = 2.00 kg is dropped from height h = 90 cm onto the spring of spring constant k = 1960 N/m. Find out the maximum distance the spring is compressed.
Two identical spacecraft are to be accelerated by rockets. The first rocket fires with a force 4 times as large as that of the second rocket. The acceleration of the first rocket is how many times as vast as the acceleration of the second rocket.
Dolphins and other sea creatures can leap to great heights by swimming straight up and exiting the water at a high speed. What is the force of the water on the dolphin as it is coming to rest
A metal conducting sphere of radius 15cm has a net charge of 30nC and is located with its center at the origin. what is the electric potential at the origin
In a head-on collison with an atom, a fast-moving electron suffers a deceleration of 4.0x10^23 m/s^2. What is the electric radiation field generated by the electron at a distance of 10 cm at right angles to the direction of motion
A fisherman reels in 12 of line while landing a fish, using the constant forward pull of 35. How much work does the tension in the line do on fish.
A diffraction grating 23.0 mm wide has 5780 rulings. Find the angle at which the first intensity maxima occurs if the incident radiation has a wavelength of 585.0 nm
A 0.250-kilogram cup at 15 °C is filled with 0.100 kg of boiling coffee. The cup and the coffee come to thermal equilibrium at 75 °C. what is the specific heat of the cup material
A cube of ice is taken from the freezer at -5.7%u2218Cand placed in a 95g aluminum calorimeter filled with 305g of water at room temperature of 20.0 %u2218C, What was the mass of the ice cube
1.research to find equations that would help you find g using a pendulum. design an experiment and test your design
Express your reply in terms of the cylinder's radius r and the magnitude of the acceleration because of gravity g.
Suppose you have a near-point distance of 16 cm. The angular resolution of the eye is determined by diffraction, What is the smallest object your bare eye can resolve
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