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Sirius has a luminosity of 8.4 * 10^27 Watts and a mass of 2.1 times the mass of the Sun.
a. How much hydrogen does Sirius convert into helium each second?
b. At this rate, how long would it take Sirius to convert all of its hydrogen into helium?
At what height above the surface of the earth does the balloon have a speed of 7-m/s.
A 1110 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960 N crate hangs from far end of beam.
A baseball outfielder throws a 0.150 kg baseball at a speed of 39.0 m/s and an initial angle of 33.0°. What is the kinetic energy of the baseball at the highest point of its trajectory.
A toy car with a mass of 120 g moves to the right with a speed of 0.62 m/s. A small child drops a 21.0-g piece of clay onto the car, What is the change in speed of the car
When winter arrives, the towers stay the similar distance apart and the bridge deck keeps the similar shape as its expansion joints open. When the temperature drops to -10.0°C, what is the tension in the wire? Take Young's modulus for steel to be ..
Once a traffic light turns green, a car speeds up from rest to 50 mi/h with constant acceleration 9 mi/h • s. In the adjoining bike lane, a cyclist speeds up from rest to 20mi/h with constant acceleration 13mi/h.
find the maximum distance she can be from the craft and still return within 2.30 min (the amount of time the air in her helmet remains breathable).
After being struck by the stone, the boat's velocity is 1.9 m/s, due east. Illustrate what is the mass of the boat? Assume the water offers no resistance to the boat's motion.
Calculate the radius of the path, direction of the force experienced by the electron and the path of the electron through the magnetic field.
Assume that the volume of the empty spaces between the candes is negligible. If the height of the candes in the container increases at the rate of 0.270 cm/s, at what rate (kilograms per minute) does the mass of the candies in the container increa..
A cylindrical container 1.60 {rm m} tall contains mercury to a certain depth, d. The rest of the cylinder is filled with water.
You are driving a car that weighs 1500 kg at 50 km/h, How much force would you need to apply on the wheels of your car through the breaks in order to be able to stop short of hitting the cat
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