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Inside a helium nucleus there are two protons, each of charge +e. The distance between the centers of the two protons is about 1.6 femtometer. Calculate the strengths of the electrostatic repulsive force and the gravitational attractive force between the two protons. (1 femtometer = 10^-15 m, e = 1.6x10^-19 C)
A construction hoist exerts an upward force of 500 N on an object with a mass of 50 kg. determine the power it expended to lift the object vertically for 10 seconds under these conditions
25.00kg lead sphere is hanging from a hook by a thin wire 3.50m long, and is free to swing in a complete circle. What must be the minimum initial speed of the dart
If the pressure of the 1.8-cm3 volume is reduced to 1.8 × 10?11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container
For a damped oscillator with a mass of 180 g, a spring constant 58 N/m and a damping coefficient of 60g/s, what is the ratio of the amplitude of damped oscillations to the initial amplitude at the end of 26 cycles.
A radio station broadcasts at a frequency of 600,000 Hz. Know that radio waves have a speed of 3.00 x 10^8m/s, what is wavelength of these waves.
Jupiter emits radio waves and also visible light (reflected Sunlight). Which of the following statements about the light we detect from Jupiter is true.
A 200g ball on a 70-cm-long string is swung in a vertical circle about a point 200 cm above the floor. What was the tension in the string an instant before it broke
A sound wave with intensity 10 mW/m2 interferes destructively with a sound wave that has an intensity of 1 mW/m2. What is the intensity of the superposition of the two
The two angled ropes used to support the crate in the figure below an withstand a maximum tension of1400Nbefore they break. What is the largest mass the ropes can support
Two capacitors of capacitance 6microF and 8 micro F are connected in parallel. What is the equivalent capacitance of this combination
what is the entropy change during the free expansion of 1.70 moles of an ideal gas from an intial volume of 1.60 liters into an evacuated volume of 1.90 additional liters
An object is located 15 cm in front of (to the left of) a converging lens with a focal length of 10 cm. To the right of the converging lens, compute the location of the final image
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