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Students in a fraternity house want to be able to spray water 25 m across their neighbor's yard onto a patio. What size nozzle do they need
An electron with an initial speed of 4.90×105m/s is brought to rest by an electric field. What was the potential difference that stopped the electron
a spring has a constant k=8.75 N/m. if the spring is displaced 8.150 m from its equilibrium position, what is the force that the spring exerts
Consider a sample of diatomic ideal gas which is taken through the following cycle: A constant pressure process that doubles the volume of the gas, What is the efficiency of this cycle
Suppose an astronaut has landed on Mars. Fully equipped, the astronaut has a mass of 125 kg, What is the acceleration due to gravity on Mars
What is the force of gravity between two 1000-kg cars separated by a distance of 25m on a interstate
A horizontal force of 250 N is applied to a stationary wooden box in one direction, What additional force is needed for the box to remain stationary
Two small metallic spheres, each of mass m = 0.25 g, are suspended as pendulums by light strings from a common point as, compute the magnitude of the charge on each sphere
In this section assume the temperature is 20unless directed otherwise. A submarine 79 deep emits a sonar (sound) wave. How deep is the ocean at that point
The drawing shows three different resistors in two different circuits. The battery has a voltage of V = 27 V, and the resistors have resistances of R1 = 50.0 ?, R2 = 25.0 ? and R3 = 10.0 ?. What is
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
Two charged, parallel, flat conducting surfaces are spacedd=2.00cm apart, What is the initial speed of the electron if it stops just at the second surface
A 51.1 kg bungee jumper jumps off a bridge and undergoes simple harmonic motion. what is the spring constant of the bungee cord
During 8.83 seconds a motorcyclist changes his velocity from v1,x = -36.5 m/s and v1,y = 10.5 m/s to v2,x =-23.1 m/s, Find the components of the motorcycle\'s average acceleration
A speedboat moves on a lake with initial velocity vector v1,x = 9.61 m/s and v1,y = -2.71 m/s, Find the speedboats final speed
When two identical ions are separated by a distance of 8.6×10?10 m, How many electrons are missing from each ion
A skateboarder, starting from rest, rolls down a 13.1-m ramp. If the ramp is inclined at 26.5 ° with respect to the ground, what is the component of her acceleration that is parallel to the groun
A space vehicle is coasting at a constant velocity of 15.1 m/s in the +y direction relative to a space station. find the direction of the vehicle's velocity relative to the space station
A Carnot heat engine is to be designed with an efficiency of 81%. what is the temperature of the "hot" reservoir
Heat is added to two identical samples of a monatomic ideal gas. In the first sample the heat is added while the volume of the gas is kept constant, By how much does the temperature of this sample i
Two small metallic spheres, each of mass m = 0.45 g, are suspended as pendulums by light strings from a common point, calculate the magnitude of the charge on each sphere
A molecule of DNA (deoxyribonucleic acid) is 2.07 µm long. The ends of the molecule become singly ionized: negative on one end, Determine the effective spring constant of the molecule
A large truck collides head-on with a small car. how do the forces acting between the truck and car compare during the collision
Two conductors having net charges of +17.0 µC and -17.0 µC have a potential difference of 17.0 V between them. What is the potential difference between the two conductors
a 0.346kg glider moves along a frictionless level air track tugged by a mass of 0.050kg suspended vertically over a pulley