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The angular size of Mercury crater observed with the Earth ground telescope is .11 arc seconds. Calculate the diameter of this crater D (in km) and its are S (in km^2). At the moment of observation, the distance d between the Earth and Mercury was d= 1.3 AU.
A force F of 20N acts on two blocks on a frictionless surface. Block A is 3.0kg and Block B is 2.0kg. What is the acceleration of the system
The tungsten filament of a light bulb has an operating temperature of about 2 100 K. what is the power output of the light bulb
A) What is the work done by the external forces on the mass? B) If the mass was initially at rest, what is the final velocity?
A 2 m long diving board rests on two supports C and D. C is placed at the left end. The mass of the diving board is 10 kilogram. Estimate the magnitude of force D
The proper length of one spaceship is three times that of another. The two spaceships are traveling in the same direction, determine the speed of the faster spaceship
An unknown substance has a mass of 0.125 kg and an initial temperature of 94.7. calculate the specific heat of the unknown substance
calculate the electric field at the center of a square 53.0 cm on a side if one corner is occupied by a 48.0 microc
a simple harmonic oscillator consists of a block of mass 3.00kgattached to a spring of spring constant 370 N/m. what is the amplitude of the oscillations
One end of a post weighing 400N and with height hrests on a rough horizontal surface with μs=0.30. The upper end is held by a rope fastened to the surface and making an angle of 36.9o with the post. A horizontal force F→ is exerted on the post as s..
question1a 60.0-kg projectile is fired at the angle of 30.0deg above the horizontal with an initial speed of 1.28 102
A boy throws ball straight upward. It leaves his hand 1.2 m above the ground, and lands at his feet, on the ground, after 1.5 seconds. What was the peak height of the ball above the ground
A dolphin in seawater at a temperature of 25 °C makes a chirp. How much time passes before it hears an echo from the bottom of the ocean, 208 m below.
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