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A rock is thrown from the edge of the top of a 100 feet tall building at some unknown angle above the horizontal. The rock strikes the ground a horizontal distance of 160 feet from the base of the building 5.0 second after being thrown. Suppose that the ground is level and that the side of the building is vertical. Calculate the speed with which the rock was thrown.
Two 50 ohm resistors are connected in series to a 12 volt battery. What is the total resistance of the circuit
A 50 gram ball enters a a pendulum with mass 200 g. The pair then swings up to a height of 14.5 cm. Find the initial velocity of the ball before the collision
A diffraction grating with 610 lines per mm is illuminated with light of wavelength 520 nm. A very wide viewing screen is 2.1 m behind the grating. What is the distance between the two m= 1 fringes? Use two significant figures
On a frictionless horizontal surface a 1.50 kg mass traveling at3.50 m/s collides with and sticks to a 300 kg mass that isinitially at rest. This system runs into an ideal spring forceconstant 50.0 N/cm.
If the speed of the aircraft is 684 km/h and the radius of the circle is2.0 {\rm km}, calculate the normal force exerted on seat with the pilot at the bottom of the loop. Express your answer in terms of the pilot's weight W.
Two equal forces are applied to a door. The first force is applied at the midpoint of the door; the second force is applied at the doorknob. Which force exerts the greater torque
Two solid blocks of identical size are submerged in water. One block is aluminum and the other is lead. Upon find which is the buoyant force greater
Red light of wavelength 665.9 nanometer produces photoelectrons from a certain material. Evaluate what is the material work function
a jetliner is moving at a speed of 270 km/h. the plan then decelerates at 4.5 m/s2. what is the minimum runway length on which this aircraft can land
Silver has a resistivity of 1.62×10^?8 ?m, and a density of 1.05×10^4 kg/m3. What is L? 2.At 20.0 °C, a mainly silicon resistor has a resistance of 585 ?, At what temperature will their resistances be equal
You brake your Porsche with constant acceleration from a velocity of 23.6 m/s to 12.5 m/s over a distance of 105 m. How much time elapsed during this interval
capacitor a and capacitor b both have the same voltage across their plates. however the energy of capacitor a can melt
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