Question An ion of mass m and charge + e is in circular motion around a point charge Q with –8.0 microCpulomb charge. The radius of the orbit is 0.20 m and the speed of the orbiting ion is 1.2x106 m / s. A Uniform magnetic field is present and is perpendicular to the plane of the orbit. Magnetic force on the ion it is equal to the electric force in magnitude and direction at all points in the orbit. With This information will determine: 5. The magnetic field vector. 6. The mass of the ion is: 7. The radial acceleration is: V = 1.2 x 106m/s AY 0.20 m © # O - -8.0μο х

A 3.0×10−4 V/m electric field creates a 2.1×1017 electrons/s current in a 2.0-mm-diameter aluminum wire. Part A What is the drift speed? Part B What is the mean time between collisions for electrons in this wire?

F W M A D E C F B с а a b Given that w = 5 kN/m, F = 17 kN, M = 30 kNm, a = 3 m, b = 1.5 m and c = 1.5 m, determine the internal normal force, shear force and bending moment at points Eand Fin the compound beam. Point F is located just to the left of the force Fand couple moment M. Round all answers to the nearest integer. Normal force at Ein kN (round to the nearest integer): KN Shear force at Ein kN (round to the nearest integer): KN Bending moment at Ein kNm (round to the nearest integer): kNm Normal force at Fin kN (round to the nearest integer): KN Shear force at Fin kN (round to the nearest integer): KN Bending moment at Fin kNm (round to the nearest integer): kNm

A population of cattle is increasing at a rate of 300+80t per year, where is measured in years. By how much does the population increase between the 2 th and the 4 th years.

A projectile is launched with an initial speed of 43.0 m/s at an angle of 32.0° above the horizontal. The projectile lands on a hillside 3.95 s later. Neglect air friction. (Assume that the +x-axis is to the right and the +y-axis is up along the page.) (a) What is the projectile's velocity at the highest point of its trajectory?

PEER TO PEER BUSINESS 1. Prior to launching their firms, how could BlackJet, Ridejoy, and neighborrow.com have better anticipated the issues that ultimately caused them to fail? 2. In regard to putting together an effective business model, what can other peer-to-peer business model start-ups learn from the failures of BlackJet, Ridejoy, and neighborrow.com? 3. Spend some time looking at lyft, one of the successful peer-to-peer business model companies mentioned in this feature. Why do you think lyft has been successful while BlackJet, Ridejoy, and neighborrow.com failed? 4. What role do you think the industry that a start-up is in plays in its success or failure as a peer-to-peer business? Are some industries more receptive to peer to peer business model start-ups than others? Explain your answers.

An airplane propeller is 2.68 m in length (from tip to tip) and has a mass of 117 kg. When the airplane's engine is first started, it applies a constant net torque of 1990 N·m to the propeller, which starts from rest. . What is the angular acceleration of the propeller? Model the propeller as a slender rod. Express your answer in radians per second squared. View Available Hint(s) a = 28.4 rad/s Submit Previous Answers Correct What is the propeller's angular speed after making 5.00 revolutions? Express your answer in radians per second. How much work is done by the engine during the first 5.00 revolutions? Express your answer with the appropriate units. What is the average power output of the engine during the first 5.00 revolutions? Express your answer with the appropriate units. What is the instantaneous power output of the motor at the instant that the propeller has turned through 5.00 revolutions? Express your answer with the appropriate units.