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What would his weight (the gravitational force due to the Earth) be if he doubled his distance from the center of the Earth by flying in a spacecraft?
A 23 g rifle bullet traveling 210 m/s buries itself in a 3.0 kg pendulum hanging on a 2.9 m long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the p
A projectile is fired at an upward angle of 45 from the top of a 227 m cliff with a speed of 160 m/s. What will be its speed when it strikes the ground below? (Use conservation of energy.)
In a photoelectric effect experiment, 325 nm photons strike a cathode that has a work function equal to 1.25 eV. What is the maximum kinetic energy of the electrons removed from the cathode by this
The sun is a sphere with radius 6.96 x 10^8 m and average surface temperature of 5800 K. Determine the amount by which the sun's thermal radiation increases the entropy of the entire universe each s
A 2000 kg car traveling at a speed of 39 m/s skids to a halt on wet concrete where f_k = 0.20. how long is the cars skid marks?
A hydrogen atom has a radius of 5 x 10^-9 cm. The radius of the observable universe is about 14 billion light years. How many times larger than a hydrogen atom is the observable universe? Use power
A 0.04 m^2 rectangular loop consists of 90 turns and carries a current of I = 4.6A. A 2-T magnetic field is directed perpendicular to the plane of the loop. If the loop is free to rotate about an ax
How many hydrogen atoms are contained in the sun? How many helium atoms (the mass of a helium atom is 6.7 x 10^-27 kg)?
A car is traveling at 55.0 km/h on a flat highway. (a) If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop?
Which makes the pendulum swing upward in an arc. Determine the maximum vertical displacement of the pendulum (height).(g = 9.8 m/s2)
A 4.3-g bullet leaves the muzzle of a rifle with a speed of 304 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.8-m-long barrel of the rifle?
Air at 250 kPA and 15C is being forced into a tire, whihc has a volume of 0.5m^3, at a velocity of 60 m/s through a 6 mm opening. Find the rate of change of the density in the tire.
A movable piston having a mass of 12 kg and a cross-sectional area of 7 cm2 traps 0.25 mol of an ideal gas in a vertical cylinder. The piston slides without friction in the cylinder. The outside of
After all the external forces are removed (so the compressed spring releases the mass) how far D along the plane will the block move before coming to a stop?
For a damped oscillator with a mass of 280 g, a spring constant 74 N/m and a damping coefficient of 59 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at
The intensity level of the street traffic is 60dB. If you are conversing with a friend in a sidewalk café, what will be the total intensity of the combined sounds?
The radius of this section of the track is r1 = 24 m. Find the force that a seat in the roller-coaster car exerts on a 52-kg passenger at the lowest point.
A high-speed drill reaches 2000 rpm in 0.50 s. What is the drill's angular acceleration? Through how many revolutions does it turn during this first 0.50 s?
Find the magnitude of the resultant force which these engines exert on the rocket. Find the deviation of the direction (relative to the forward direction) of the resultant force which these engines e
Give typical examples of electromagnetism in your daily life. Write a short paragraph on the importance of electromagnetism in modern world. Discuss the electromagnetic waves in the context of eart
A 35.5 kg monkey climbs a rope. a) what is the tension in the rope, if the monkey climbs with constant speed b) what is the tension in the rope, if the monkey accelerates upwards at a rate of 2.50m
A rectangular air mattress is 2.00 m long, 0.500 m wide, and 0.100 m thick. If it has a mass of 2.8 kg, what additional mass can it support in water? The acceleration of gravity is 9.8 m/s2
Aluminum calorimeter filled with 300 g of water at room temperature of 20°C. The final situation is observed to be all water at 18°C. What was the mass of the ice cube?
At one point in a skydive, a falling 99 kg skydiver is encountering air resistance of 442 N. How much does the skydiver weigh? 970.2N