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A proton beam in an accelerator carries a current of 115 µA. If the beam is incident on a target, how many protons strike the target in a period of 26.0 s?
A heat engine operates as a reversible Carnot cycle transfers 6.0 kW of heat from a reservoir at 1000 K and then rejects it to the atmosphere at 300 K. Calculate the thermal efficiency of the engi
As a high-power laser engineer you need to focus a 1.17-mm diameter laser beam to a10.3-µm diameter spot20.6cm behind the lens. What focal length lens would you use?
Two converging lenses with focal lengths 2cm and 12cm, respectively, are placed 30 cm apart. An object of height= 5 cm is placed15cm to the left of the 2-cm lens. What will be the position and heigh
A model train moves along a horizontal circular track with a radius of 0.5 m. Starting from rest, the train accelerates at 0.2 m/s2. What is the angular acceleration (in rad/s2) of the train?
The top of the hill can be approximated by an arc length of a circle with a radius of 370 m. What is the weight (in N) of the car at the top of the hill?
A 5 cm by 5 cm square loop of wire is rotating at 30 rpm in a uniform magnetic field of strength 3.0T. The direction of the field is perpendicular to the axis of rotation of the loop. What is the em
Estimate the electrical energy stored in the atmosphere, if the earth's electric field extends upward for 1700 m. and has an average magnitude of 170 V./m.
If the transformer wee connected backwards, secondary coil to power source, what would be the output voltage of the device?
The sound level measured 5.2 m away from a jet engine is 140 dB. (A) What is the intensity of the sound at 5.2 m?
A cyclotron designed to accelerate protons has a magnetic field of magnitude 0.260T over a region of radius 2.40m. (a) What is the cyclotron frequency?
A 8.0 uf (uf means microfarad) capacitor and a 6.0 uf capacitor are connected in series, and the combination is connected in parallel with a 4.0 uf capacitor. What is the equivalent capacitance (i
Question: An electron is accelerated through 2.45103V from rest and then enters a uniform 2.80-T magnetic field. (a) What is the maximum magnitude of the magnetic force this particle can experience
A proton travels with a speed of4.90106m/s at an angle of 65°with the direction of a magnetic field of magnitude 0.240T in the positivex-direction. What is the magnitude of the magnetic force on
You have 15 m of wire, a constant magnetic field of 0.35 T, and a device that can rotate a coil at a fixed frequency of 300 Hz. A circular coil of what radius will produce an AC emf of maximum vo
Citizens band (CB) radio uses radio waves with frequencies near 27 MHz. What are the wavelengths of these waves, and how long should a quarter-wavelength CB antenna be?
Determine the capacitance of a Teflon-filled parallel-plate capacitor having a plate area of 1.90 cm2 and insulation thickness of 0.0500 mm.
In an ideal Rankine Cycle, condensate/feedwater enters a pump at temperature of 102 degrees F and exits at a temperature of 106 degrees F.
Two capacitors C1 = 4.00µF and C2 = 14.0µF are connected in series to a 9.00 V battery. (a) Find the equivalent capacitance of the combination.
The depth of the water does not change as it flows into the four channels. What is the speed of the water in one of the smaller channels?
A monochromatic point source of light emits 5.5 W of electromagnetic power uniformly in all directions. Find the (magnitude of the) Poynting vector at a point situated at each of the following locat
An inductor of 219 mH with a resistance of 6 O is connected to a power supply with a maximum voltage of 219 V and a frequency of 69 Hz. Find the power loss in the inductor. Answer in units of W.
Why is the spectrum from a black body source continuous while a spectrum for a gas discharge source of the same apparent color temperature has sharp peaks? How is the energy distributed in each of
An inductor of 219 mH with a resistance of 6 O is connected to a power supply with a maximum voltage of 219 V and a frequency of 69 Hz. Find the phase angle between the current and applied voltage.
Why is it that a grow-lamp tube has an apparent color temperature of 5500 K and is cool to the touch. However, the much dimmer tungsten lamp burns on touch? What would the blackbody spectrum of the