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A snowball rolls off a barn roof that slopes downward at an angle of 40 degree. The edge of the roof is 14.0 meter above the ground, and the snowball has a speed of 7.00 m/s as it rolls off the roof. Neglect air resistance.
Find how far from the edge of the barn does the snowball strike the ground if it doesn't strike anything else while falling?
Excluding fine and hyperfine transitions, do all transitions that end up in the ground state of hydrogen give ultraviolet light? Why? A brief explanation would be greatly appreciated
the ed scale defines the perfect temperatre of a martinin to be 5 degrees e and the boiling point of antifreeze to be
An artificial earth satellite has a circular orbit of radius 5.91 106 m (which means it is orbiting approximately -450 km above the surface of the earth) in an equatorial plane. Find the satellite's instantaneous acceleration at time t. Magnitude? ..
A wheel of radius R = 20.4 cm, mass M = 2.47 kg, and moment of inertia I is mounted on a frictionless, horizontal axle as in the figure. A light cord wrapped around the wheel supports an object of mass m = 0.514 kg.
How various lines per centimeter does a grating have if the third-order occurs at a 23.0 degree angle for 630-nm light.
A 120-V motor has mechanical power output of 2.60 hp. It is 85.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the energy delivered to the motor by electrical transmission in 3.20 h of operat..
A box at rest has the shape of a cube 3.5m on a side. This box is loaded onto the flat floor of a spaceship, What is the volume of the box as we observe it
A ball of circumference 72.7 cm and mass 605 g is forced to the bottom of a swimming pool and then released. After initially accelerating upward, it rises at a constant velocity. (The density of water is 103 kg/m3.)
A source delivers an AC voltage of the form ?v = 80.6 sin (78?t), where ?v is in volts and t is in seconds, to a capacitor. The maximum current in the circuit is 0.520A.
it is found experimentally that the electric field in a certain region of earths atmosphere is directed vertically
Object A, which has been charged to + 29.2 nC, is at the origin. Object B, which has been charged to - 28.9 nC, is at ( x,y ) = ( 0.0;{rm cm},; 1.50 cm ).What is the y-component of force (vec{F}_{rm A ; on ; B})_{rm y} on B due to A.
A railroad car of mass 4.0 * 10^4 kg moving at 5.0 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.50 m/s.
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