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Typical household currents are on the order of a few amperes. If a 1.54A current flows through the leads of an electrical appliance, how many electrons per second pass through it? (in electrons per
Can hydrophobic interactions be rigorously treated as additive (Newtonian) forces? Explain why in terms of N-body contribution of dGhyd (delta gradient of hydration) and in terms of solute effects o
What is the current passing between the electrodes? Express your answer in milliamperes to three significant figures. (in mA) What is the direction of the current in the ionic solution? Away or towa
The woman pushes on the man with a force of 55 N due east. Determine the acceleration (magnitude and direction) of (a) the man and (b) the woman.
The electron's acceleration is due to two electric forces parallel to the x axis: = 9.22 x 10-17 N, and , which points in the -x direction. Find the magnitudes of (a) the net force acting on the ele
The student on the right has a mass of 44 kg and can throw the ball with a relative speed of 11 m/s. (Assume there is no friction between the ice and the sleds and no air resistance.)
A particularly beautiful note reaching your ear from a rare Stradivarius violin has a wavelength of 39.1 cm. The room is slightly warm, so the speed of sound is 344 m/s. If the string's linear densi
The electron is moving along the x axis with the velocity along the positive x direction and the wire lies in the y-z plane and is parellel to the y axis. What is the direction of the force on the e
what minimum area should the plates of the capacitor have to obtain a capacitance of 7.0 multiplied by 10-2 µF and to ensure that the capacitor will be able to withstand a potential difference
A component with a 44 Ohm resistor is rated for use at power levels not exceeding 2,451 mW. How much current can safely flow through the component? Express the answer with two decimal places.
A 76 W light bulb with a resistance of 175 Ω is connected to a power supply with a 117 V. What is the internal resistance of the power supply? Express the answer with one decimal place.
A motorcycle has a constant acceleration of 4.93 m/s2. Both the velocity and acceleration of the motorcycle point in the same direction. How much time is required for the motorcycle to change its sp
There is an oscillating simple pendulum slowing down. Assuming time starts when the pendulum is released, find an equation for the angle as a function of time. (Note: you must include damping for fu
A ball is tied to the end of a cable of negligible mass. The ball is spun in a circle with a radius 2.00 m making 7.00 revolutions every 10.0 seconds. What is the magnitude of the acceleration of th
A spacecraft engine creates 55.1 MN of thrust with a propellant velocity of 4.88 km/s. (a) Find the rate (dm/dt) at which the propellant is expelled.
A 2.00kg block hangs from a spring. A 300g body hung below the block stretches the spring 2.00cm farther. (a) What is the spring constant? (b) If the 300g body is removed and the block is set into
A 60.0-kg person rides in an elevator while standing on a scale. The scale reads 400 N. What is the acceleration of the elevator?
Two points A and B lie 20 cm apart on a line extending radially from a point charge Q. If the potential at A is 150 V and the potential at B is 120 V, find the charge Q and the distance of point A f
What is the initial horizontal velocity of the block as it flies off the table? (assume this to be in the positive direction)
A ball and bat, approach one another each with the same speed of 2.70 m/s, collide. Find the speed of the ball after the collision. (Assume the mass of the bat is much much larger than the mass of t
A bullet (m = 0.0230 kg) is fired with a speed of 99.00 m/s and hits a block (M = 2.60 kg) supported by two light strings, stopping quickly. Find the height to which the block rises.
Running into the train at that speed would severely damage both train and passengers. Calculate the minimum time Superman must take to stop the train, if the passengers experience an average horizon
Calculate the power which the engine must deliver (to compensate for air resistance and rolling resistance) in order to maintain that speed.
In this case, the line breaks when the kinetic energy of the plane is 51.5 J. Find the magnitude of the charges.
Part A) A power plant burns coal and generates an average of 620.0 Megawatts (MW) of electrical power while discharging 979.60 MW as waste heat. Find the total electrical energy generated by the pla