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Alex and Bob are twins working on a space station located at a fixed position in deep space. Alex undertakes an extended return spaceflight to a distant star, while Bob stays on the station.
Mary is in a train traveling at 30m/s. Fred is standing next to the train tracks. The train passes Fred at 30m/s. 2m after the train passes, Fred throws a ball to Mary at 35m/s .
The hot-air balloon shown below is tethered with three mooring Cables. The force Tb in cable DB has a magnitude of 2230 N.Determine the magnitude of the rectangular component of the force Tb along DA.
A reversible heat pump is used to maintain a temperature of 0c in a refrigerator when it rejects the heat to the surroundings at 25c. If the heat removal rate from the refrigerator is 1440 kj/min, d
What is the highest possible theoretical effeciency of a heat engine operating with a hot reseroir of furnace gases at 2100c when the cooling water available is at 15c?
Determine the work and heat transfer, each in kl/kg of air flowing. repeat for (b) an isothermal compression and (c) an isentropic compression.
A sperical conductor has a total charge +Q, and radius R. 1) what is the shape of equipotential surfaces outside the conductor? 2) What is the shape of the equipotential surfaces inside the conducto
An electron with speed v0 = 15.0 × 106 m/s is traveling parallel to a uniform electric field of magnitude E = 10.4 × 103 N/C.How much time will elapse before it returns to its starting poi
Calculate the electric field at the center of a square 53.0 cm on a side, if one corner is occupied by a +48.0 µC charge and the other three are occupied by -22.0 µC charges. (Assume the
Calculate the electric field at one corner of a square 1.00 m on a side if the other three corners are occupied by 2.15 × 10-6 C charges??
A particle falling under gravity is subject to a retarding force proportinal to it's velocity. Find it's position as a function of time, if it starts from rest, and show that it will eventuall reach
A particle of mass m moves ( in the region X>0) under a force F = -kx+c/x, where k and c are positive constants. Find the corresponding potential energy function. Determine the position of equil
Consider a circuit consisting of a battery of voltage V and a parallel plate capacitor of capacitance of C0. If a dielectric slab with dielectric constant k is inserted, what is the energy delivere
What is its angular velocity when it reaches the vertical? When it first returns to its starting point, it is given an impulsive blow towards the vertical that increases the amplitude of swing to 10
When a mass is suspended from a spring, the equilibrium length is increaseb by 50 mm. The mass is then given a blow which starts it vertically at 200mms^-1. Find the period and amplitude of the resu
The space shuttle orbited the Earth in a circular orbit with a radius of 200 miles greater than the earth's radius. A) Compare the length of one space shuttle orbit around the earth in meters.
An accelerator increases the total energy of electrons uniformly to 10 GeV over a 3000 m path. That means that at 30 m. 300 m, and 3000 m, the kinetic energy is 108. 109. and 1010 eV, respectively.
Find the transformation matrix R that describes a rotation of 90 degrees about an axis from the origin through the point (1,1,0). The rotation is clockwise as you look down the axis toward the origi
H(z) is a discrete rational transfer function. To ensure that both H(z) and its inverse are stable its
Find the transformation matrix R that describes a rotation of 90 degrees about an axis from the origin through the point (1, 1, 0). The rotation is clockwise as you look down the axis toward the ori
A bottle of bleach is opened in a closed room where the air is perfectly still. Estimate how long it will take for the bleach molecules to diffuse through the extent o
A half-open pipe is constructed to produce a fundamental frequency of 250 Hz when the air temperature is 18 °C. It is used in an overheated building when the temperature is 38 °C. Neglecting
Two trains are traveling toward each other in still air at 26.0 m/s relative to the ground. One train is blowing a whistle at 314 Hz. The speed of sound is 343 m/s. (a) What frequency is heard by a
In a thundercloud, there may be electric charges of 140.0 C near the top of the cloud and 240.0 C near the bottom of the cloud. These charges are separated by 2.00 km. What is the electric force on
An electron is moving east in a uniform electric field of 1.55N/C directed to the west. At point A, the velocity of the electron is 4.50 × 105 m/s pointed toward the east. What is the speed of