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What magnetic field is necessary perpendicular to both the electron path and the electric field so that the electron travels in a straight line?
Here are the enthalpy changes when one mole of HCl gas is added to various moles of water: -16.608 Kcal for 10 mol, -17.272 Kcal for 25 mol, -17.453 Kcal for 40 mol, -17.735 Kcal for 200 mol, -17.96
An alpha particle (q = +2e, m = 4.00 u) travels in a circular path of radius 4.50 cm in a uniform magnetic field with B = 1.80 T. Calculate its kinetic energy in electron-volts.
An electron is accelerated from rest by a potential difference of 350 V. It then enters a uniform magnetic field of magnitude 200 mT with its velocity perpendicular to the field. (a) Calculate the s
How many cubic meters of ore at an average density of 2.8 g/cm3 had to be excavated to provide the uranium if the ore grade was 0.8 w/o?
At some point in its orbit our asteroid is moving with a speed of 20 kilometers per second. Determine the kinetic energy of the asteroid assuming it has a mass of 1000 kilograms. Be sure your answer
If the distance from the Sun varied during our asteroid's orbit, would its kinetic energy change? Would its potential energy change? Would the total energy (sum of kinetic and potential energy) of
Neutral Particle A neutral particle is at rest in a uniform magnetic field B. At time t = 0 it decays into two charged particles, each of mass m. (a) If the charge of one of the particles is q = +20
What amount of current is needed to provide a modest force of magnitude 5 kN? Take the vertical component of Earth's field to be 10 µT and the length of the axle to be 3.0 m.
If the angular speed of the front sprocket is 0.650 rev/s, what is the radius of the rear sprocket for which the tangential speed of a point on the rim of the rear wheel will be 4.50 m/s? The rear w
Find the required angular speed rev/min of an ultra-centrifuge for the radial acceleration of a point 2.50cm from the axis to equal 400000g (that is, 400000 times the acceleration due to gravity)
Dr. Brown's new house will need to use propane (C3H8) gas to fuel the range, because natural gas service is not available at the location. The propane is stored as a liquid, and the gas to be burned
Compare the relative translational, vibrational, and rotational contributions to heat capacity for gaseous water and sulfur hexaflouride at a fixed temperature.
Two long, straight wires are perpendicular to the plane of the paper. Each wire carries a current of magnitude I. The currents are directed out of the paper toward you. What expression gives the mag
Calculate the standard free energy change in kJ between Br2 and Cl- to form Br- and Cl2 when all components of the reaction are at standard state conditions.
A clockwise current Icoil=2.0 A flows in the coil. A long straight wire carrying a current Iwire=31 A toward the left is located 0.05 m from the edge of the coil. The magnetic field at the corner of
Two forces on the object are F = 3.2N at 80 below the +x-axis and F = 3.2N at 40 above the -x-axis. Is there a third force on the object? Find the magnitude of the third force in Newtons and the dir
Freon-12, CF2Cl2, which has been widely used in air conditioning systems, is considered a threat to the ozone layer in the stratosphere. Calculate the root-mean-square speed of Freon-12 molecules in
A positive 1.8 -uC charge moves at a speed of 3.1 x 10^6 m/s in a direction that is perpendicular to both fields. Determine the magnitude of the net force that acts on the charge.
A proton traveling due north enters a region that contains both a magnetic field and an electric field. The electric lines point due west. It is observed that the proton continues to travel in a str
You design a simple friction-brake to stop the cylinder by pressing the brake against the outer rim with a normal force. The coefficient of kinetic friction between the brake and rim is 0.344.
What is the pressure of the gas trapped in the closed end of the apparatus shown (the other end is open to the air) when the atmospheric pressure is 720 mmHg? The Hg level in the closed end is 12 m
Why is walking on soft sand so tiring? What is the basic physics behind walking on sand, compared with walking on concrete? Why is the rocker bottom shoe similar to walking on sand?
A solenoid that is 85.2 cm long has a radius of 1.67 cm and a winding of 1110 turns; it carries a current of 4.46 A. Calculate the magnitude of the magnetic field inside the solenoid.
A reference standard prepared by dissolving 5.4 mg of a transition metal coordination compound in 40 mL of water transmits 36.3 percent of incident light at 532 nm.