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Firemen are shooting a stream of water at a burning building. A high-pressure hose shoots out the water with a speed of 26.0 as it leaves the hose nozzle. Once it leaves the hose, the water moves in projectile motion. The firemen adjust the angle of elevation of the hose until the water takes 3.00 to reach a building 41.0 away. You can ignore air resistance; assume that the end of the hose is at ground level.
An 10m, 210N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50° angle with the ground. How far up the ladder can an 850N person climb before ladder b..
A puck of mass m = 1.20 kg slides in a circle of radius r = 18.0 cm on a frictionless table while attached to a hanging cylinder of mass M = 2.80 kg by a cord through a hole in the table
Consider a a series circuit containing an inductor (100 mH), a capacitor (40 microF) and a resistor (50 ohms). It is connected to the AC mains (f = 60 Hz, VRMS = 120 V), What is the new value of capacitance
Assume that the intensity of solar radiation incident on the cloudtops of the Earth is 1340 W/m^2. Calc the total power radiated by the Sun, taking the average Earth-sun separation to be 1.496 * 10^11 m.
Find the energy (in joules) of the photon that is emitted when the electron in a hydrogen atom undergoes a transition from the n = 5
s the speed of a wave on a string that has a mass of 3.3 kg and a length of 1.9 m while a 6.3 kg mass is hanging from the end?
A camber carriers her drinks in an ice chest made of styrofoam. The chest is 40 cm x 45 cm x 70 cm, and the walls and lid are 2.5 cm thick. What is the rate of heat flow through the walls of the box
On a spacecraft, two engines are turned on for 730 s at a moment when the velocity of the craft has x and y components of velocity v0x = 4040 m/s, Find the x and y components of the craft's acceleration
An 8.00kg mas is at rest on an incline, the incline is 32.0degrees. The incline has a rough surface (us=0.375 and uk=0.250). A force F is applied to the mass, parallel to the incline, directed upward. Find the range of values the applied force F can..
A 73 long metal string under 35.5 tension has a linear mass density 2.20×10?4, Find the frequencies of the first three harmonics
A small conductive rod of length 1.3 m moves with a constant velocity v=16 m/s in a direction parallel to a long wire carrying a current of 28 A. Calculate the electric potential induced across the rod
A 1400kg sedan goes through a wide intersection traveling from north to south when it is hit by a 2400kg SUV traveling from east to west. How fast was sedan traveling just before the collision
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