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The star Sirius is much hotter than the sun, with a peak wavelength of 290 nm compared to the sun's 500 nm. It is also larger, with a diameter 1.7 times that of the sun. By what factor does the energy emitted by Sirius exceed that of the sun?
In a head-on collision, a car stops in 0.24s from a speed of 26m/s. What force is applied to the driver by his seat belt during that fraction of a second
Ricardo of mass 80 kilogram, and Carmelita, who is lighter, is enjoying Lake Merced at dusk in a 30 kilogram canoe. Determine what is Carmelita mass
A photon of energy 50 MeV moves along the x-axis and Comptonscatters with an electron initially at rest. After the collision the resulting photon is observed traveling along the y-axis and the electronhas recoiled.
A 4.6 cm long insect is perpendicular to the optical axis of a thin lens; the bug is 6.7 cm away from the lens. How far behind the lens is the screen
the total liftoff mass of the space shuttle orbiter is 11000kg. the combined thrust of the three on board liquid fuel
An archer shoots an arrow at a 73.0 m distant target, the bull's-eye of which is at same height as the release height of the arrow. At what angle must the arrow be released to hit the bull's-eye
Briefly explain in your own words why the pendulum oscillates. Where is the kinetic energy highest? Please explain why that is so. Write the equation for the pendulum's period T. What characteristic(s) of the equipment affect the period
question1a 5.0m diameter garden pond holds 1.59x103 of water. solar energy is incident on pond at an average rate of
An airplane maintains a speed of 630 km/h relative to the airit is flying through as it makes a trip to a city 750km away to the north. what time interval is required if the plane flies through aheadwind blowing at 35 km/h toward the south?
Two insulating spheres having a radii of 0.44cm and 0.64cm, masses 0.16kg and 0.49kg, How fast is the smaller sphere moving when they collide
Two vectors, A and B are added by means of vector addition to give a resultant vector R:R=A+B. What are the maximum and minimum possible values for the magnitude of R
At age forty, a man requires contact lenses (f = 58.0 cm) to read a book held 25.0 cm from his eyes. At age forty-five, he finds that while wearing these contacts he must now hold a book 29.0 cm from his eyes.
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