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A star is 4.94 × 1020 m from the Earth. If this star was to burn out today, how many years would it take before we would see it disappear?
Time (in years):
The far point of a nearsighted person is 5.1 m from her eyes, and she wears contacts that enable her to see distant objects clearly. How high is the image formed by the contacts
A proton traveling to the right along the x-axis enters a region where there is a magnetic field of magnitude 3.7 T directed upward along the y-axis. The charge on a proton is 1.60×10?19. If the proton experiences a force of 3.6 × 10?12 N, find its s..
You're carrying a 4 m long, 23 poles to a construction site when you decide to stop for a rest. You place one end of the pole on a fence post and hold other end of the pole 35 from its tip. How much force should you exert to keep the pole motionle..
a parallel plate capacitor consisting of two square plates has a potential difference V0 across the plates, and separated by a gap of 1.1mm. what is the magnitude of the electric field inside the capacitor
A sinusoidal electromagnetic wave having a magnetic field of amplitude 1.35 mu T and a wavelength of 434 nm is traveling in the +x direction through empty space. What is the frequency of this wave? Hz What is the amplitude of the associated electric ..
A 390 ohm resistor and a 6.10uF capacitor are connected in parallel to an ac generator that supplies an rms voltage of 220V at an angular frequency of 360rad/s.
A container is filled to the brim with 1.6 L of mercury at 20°C. Determine the linear expansion coefficient of the material
A train is travelling up a 4.0 incline at the speed of 3.25 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily.
A balloon is filled with helium gas at 20.0 degrees Celsius at 1.0 atm (1 atm = 1.01 x 10^5 N/m^2). What is he heat flow into the gas
A student wants to have $30,000 when he graduates 4 years from now. His grandfather gave him a gift of $10,000. How much must he save each year (to the nearest dollar) if he deposits the $10,000 today
In a double-slit experiment, slits separated by 1.260e-4 m are illuminated by a coherent 571 nm light source. What is the angular position of the first bright fringe
The front, convex, surface of a lens made for eyeglasses has a radius of curvature of 12.4cm, and the back, concave, Calculate the focal length of the lens
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