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Suppose that a binary star system consists of two stars of equal mass. They are observed to be separated by 400 million kilometers and to take 3.0 Earth years to orbit about a point midway between them. What is the mass of each?
High-speed stroboscopic photographs show that the head of a 190-g golf club is traveling at 58 m/s just before it strikes a 46-g golf ball at rest on a tee, Find the speed of the golf ball just after impact
A 15.0 kg box is released on a 30 degree incline and accelerates down the incline at 0.30 m/s squared. Find the frictional force impeding its motion
When connected to a 120 V source, an electric heater is rated at 1200 W and a toaster at 6.0 102 W. what total current is delivered by an external source
Find the length of a side of a cube having a mass of 1.3 kg and the density of nuclear matter, taking this to be 2.3 ? 1017 kg/m3
The number density in a container of argon gas is 2.37·1025 m?3. The atoms are moving with an rms of 427 m/s. What is the temperature inside the container
In a darkened room we place a lighted tungsten bulb in a box that has one end covered with tinfoil. If we make a pinhole in the tinfoil, an image of filament appears on a screen facing the tinfoil.
A lamp is designed to operate at a temperature of 3100K. what will be the fractional increase in radiant energy
The current is increasing at a rate of3.2A/s in an RL circuit withR=4.00ohmsandL=360mH. What is the total potential difference across the resistor and inductor at the moment when the current in the circuit is 3.0 A?
A 20 kg satellite has a circular orbit with a period of 2.4 h and a radius of 8.0 Ã- 106 m around a planet of unknown mass. what is the radius of the planet
A base on Planet X fires a missile toward an oncoming space fighter. The missile's speed according to the base is 0.87 c, How fast is the space fighter traveling relative to Planet X
Take element Z = 70 from the periodic table. Ionize it 69 times so that there is only one electron left orbiting around the nucleus. What is the ground state energy of the electron?
When one person was talking in a small room, sound intensity level was 60dB everywhere within the room. Then, there were 14 people talking in similar manner at the same time in the room, what was the resulting sound intensity level.
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