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An x-ray tube accelerates electrons from rest at 5.0×10 14th m/s(squared) power through a distance of 20cm. Find the acceleration time
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. calculate How fast are the waves traveling
The Achilles tendon inserts on the calcaneus at a distance of 8cm from the axis of the ankle joint. What torque is created by these muscles about the ankle joint
A car travels a straight road at 130 km/h for 30min then at 50 km/h for 10min. What is the average speed for the entire trip
Two large equipotent surfaces are flat and parallel and separated by a relatively small distance compared to their size. What is the direction of the electric field midway between the surfaces
If electrons are accelerated from rest in an electron gun by sending them through a potential difference of 11.0 kV
Three resistors, 21, 39, and 73 , are connected in series, determine the potential difference across the three resistors
A relief airplane is delivering a food package to a group of people stranded on a very small island. What is the speed of the package when it hits the ground in mph
Electric charge is uniformly distributed inside a nonconducting sphere of radius 0.30 m. find the maximum magnitude of the electric field
Suppose the pressure of the gas equals to p=aV^2, where a is constant. Find the heat transfer to the gas during this process
An electron is traveling through a region of space in which the electric field is along the +x direction, What is the acceleration of the electron
Two small particles have charges Q1 = +2.5 ?C and Q2 = ?5.5 ?C. what is the distance between the particles
A brick has a mass of 1.10 kg. What is the brick's weight at the surface of the Earth, What is the mass of the bucket and water
You are given a container with 25.7 g of hydrogen atoms, What is the total charge on the electrons in the container
You are pulling a crate across the floor. The block has a mass of 65.0 kg. You exert a horizontal force of 140. find direction of the acceleration of the crate
The electric potential inside a conducting sphere is 245V, and a distance d = 32.0cm from the surface of the sphere, obtain the radius of the sphere
At what temperature is the speed of sound in helium (ideal gas, = 1.67, atomic mass = 4.003 u) the same as its speed in oxygen gas at 4.78 oC
If a certain mass of water falls a distance of 854 m and all the energy is effective in heating the water, what will be the temperature rise of the water
A person with a mass of 71.6 kg and a volume of 0.089 m3 floats quietly in water. find the volume of the person that is above the water
A distance away from a uniformly charged spherical object, the magnitude of the electric field is 575V/m and the electric potential is 3.50kV. What is the distance to the center of the object
As the fragment falls through the atmosphere, it is heated and some of the material is vaporized, find the composition of this hot vaporized material from the light it emits
A 70 g metal block moving at 200 cm/s slides across a tabletop a distance of 83 cm before it comes to rest. how much does the temperature of the block rise
Two friends, Barbara and Neil, are out rollerblading. With respect to the ground, Find Neils velocity direction relative to due west
Two lightbulbs operate on the same potential difference. What is the ratio of the current in bulb A to the current in bulb B
An object-spring system moving with simple harmonic motion has an amplitude A, What is the total energy of the system in terms of k and A only