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Consider a bright star in our night sky. Suppose that its power output is 6.00 X1028 W, about 150 times that of the Sun, and that its distance is 24.0 ly.
a) Discover the intensity of the starlight at the Earth.
b) Discover the power of the starlight that the Earth intercepts.
A compound microscope has an objective lens of focal length 15.0 mm and an eyepiece that gives an angular magnification of 5.00 for a final image at infinity, What is the total magnification of the microscope
The three resistors are identical with R1 = R2 = R3= 160 ?, and the battery voltage is 50 V. What is the current through resistor R2? R2 and R3 are parallel so these need to be treated with R1 as Requiv = R1+ (R2*R3)/R2+R3 but don't know where to ..
Two radio waves are used in the operation of a cellular phone. To receive a call, the phone detects the wave emitted at one frequency by the transmitter station or base unit.
A charged particle A exerts a force of 2.69 ?N to the right on charged particle B, when the particles are 14.0 mm apart. Particle B moves straight away from A to make the distance between them 17.0 mm. What vector force does it then exert on A?
A rocket is launched straight up from the earth's surface at aspeed of 1.6×104 m/s. What is its speed when it is very far away from the earth
1. the foo is define as a unit of force required to accelerate a unit of mass called a bas with the gravitational
A 5-kg bowling ball (solid sphere, ) with a diameter of 22 cm is rolling without slipping on a smooth, level surface with a speed of 7.0 m/s. What is the ball's angular momentum
One mole of oxygen gas is at a pressure of 5.40 atm and a temperature of 29.0°C. (a) If the gas is heated at constant volume until the pressure triples, what is the final temperature? °C (b) If the gas is heated so that both the pressure and volume a..
A flexible, circular conducting loop of radius 0.15m and resistance 4.0(omega sign) lies in a uniform magnetic field of 0.25t. determine the magnitude of the emf induced in the loop
A person with a mass of 103 kg is standing on a scale that reads weight in newtons inside of an elevator. If the elevator accelerates upward at 3.2 m/s2, what does the scale read.
A log of mass 40 kg is dropped into river at 0°C. If the relative density of the log is 0.8, what will be the volume of the log above the surface
An investigator collects a sample of a radioactive isotope with an activity of 4.4×105Bq . 72hourslater, the activity is 1.2×105Bq. What is the half-life of the sample
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