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A planet was discovered orbiting a star at a distance of 2870 million km with an orbital period of about 84 years (1 year = 365.25 days). What is the mass of the star?
A rock falls off the back bumper of a truck which is traveling at 26.8 m/s. The rock hits the ground 0.387 seconds after it leaves the bumper. How high above the road is the trucks bumper
A race-car drive buys a car that can accelerate at +5.9m/s^2. find the distance the two drivers travel before they are side by side
A 15 kg crate block is falling. At a certain instant the block experiences a force due to air resistance of 87 N. Draw a free body diagram for the block, Determine the block’s acceleration at this instant
A uniform electric field of magnitude 2500N/C makes an angle of 27 degrees with a plane surface of area 0.355 m2. what is the net charge inside the box
Let us approximate an electron in the n-th shell of an atom as being like an electron in the n-th shell of a hydrogen atom with an effective nuclear charge Z. Use your knowledge of the hydrogen atom to calculate the ionization energy of this elect..
A barrel will rupture when the gauge pressure within it reaches 100 kPa. How high can the water be in the pipe before the barrel ruptures
Determine the equipotential and electric field lines between the two round conductors given in Figure P12.7 using the method of moments.
sphere 1 with radius r1 has positive charge q. sphere 2 with radius 7.0r1 is far from sphere 1 and initially uncharged.
A massless spring hangs from the ceiling with a small object attached to its lower end. What is the frequency of the oscillation
Multiple-Concept Example 8 provides useful background for part b of this problem. What is the angular displacement (in rad) of each wheel
Ships A and B leave port together. For the next two hours, ship A travels at 35.0mph in a direction 80.0 degree west of north while the ship B travels 10.0 degree east of north at 30.0mph. What is the distance between the two ships
A jet airplane flying over Chyenne, Wyoming, has an air speed of 260 m/s in a direction 5.0 degrees south of west. What is the velocity of the airplance relative to the earth
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