I have done an example to calculate the actual max efficiency of a power plant given the temperatures of both the hot and cold reservoirs. My book, however, tells me nothing about how to calculate any of the following questions. A power plant produces 1 GW of electricity, at an efficiency of 40%. (a) At what rate does th
Put these prefixes in order of increasing size. Put 1 for the smallest, 2 for the next largest, etc. 1. tera- 2. centi- 3. nano- 4. giga- 5. milli- 6. mega- 7. micro- 8. kilo-
Where the General Solution Can Be Written As An Infinite Sum Of Radial Power Law Functions In Combination With Polar Angle Legendre Polynomial.
Where the General Solution Can Be Written As An Infinite Sum Of Radial Power Law Functions In Combination With Polar Angle Legendre Polynomial. See attached file for full problem description.
An old analog hand-held cellular telephone operates in the 860 to 900 MHz band and has a power output of 0.600 W from an antenna 10.0 cm long. a. Find the average magnitude of the Poynting vector 4.00 cm from the antenna, at the location of a typical person's head. Assume that the antenna emits energy with cylindrical wave
Problems on deflation of electron in a Thomson's e/m apparatus, diffraction grating, radiation and Compton effect.
(See attached file for full problem description with diagrams) --- 1. An electron entering Thomson's e/m apparatus (Figure 3.2 and 3.3) has an initial velocity (in horizontal direction only) of 0.7 107 m/s. Lying around the lab is a permanent horseshoe magnet of strength 1.3 10-2 T, which you would like to use. Figu
1. An object of mass 0.23 kg is initially at the origin and is acted on by the sole force F=(0.50 N)i. After a certain amount of time, the object is at a position r=(0.80 m)i. What is the changed in the object's kinetic energy? 2. 74 gram ball is tossed straight up in the air, rises to a maximum point, then falls back until
When a mass of 25.0 grams is suspended from a certain spring and lowered slowly until the spring stops stretching, the spring stretches 2.00 cm. What is the spring constant of the spring? a. 1.25 N/m b. 0.800 N/m c. 7.85 N/m d. 12.3 N/m A mass of 40.0 grams is attached to a vertical spring with a spring constant k = 2
The engine of a model rocket is rated with a total impulse of 5.00 N seconds and a thrust duration of 1.20 seconds. What is the average force exerted by the engine? I believe the answer is 4.17 N. I need to see each step and formula to solve this question.
1. Three resistors have values 5 ohms, 2 ohms, and 1 ohms. The first one is followed by the last two wired in parallel. When this arrangement is connected to a battery, which resistor(s) has a) the largest current, b) the largest voltage, and c) the largest power output? Please explain using a diagram and equations f
A passenger bus in Zurich, Switzerland derived its motive power from the energy stored in a large flywheel.
A passenger bus in Zurich, Switzerland derived its motive power from the energy stored in a large flywheel. The wheel was brought up to speed periodically, when the bus stopped at a station, by an electric motor, which could then be attached to the electric power lines. The flywheel was a solid cylinder with a mass of m and a di
Four resistors are connected to a battery with a terminal voltage of 15 V, as shown in attached figure. Determine the power delivered to R2. (R1 = 20 ohm;, R2 = 45 ohm)
A portable CD player uses a current of 7.2 mA at a potential difference of 3.5 V. Suppose the player has a mass of 0.47 kg. How long could the player operate (in minutes) on the energy required to lift it through a height of 1 m?
Calculate power of periodic signal for: s(t) = 0.2sin(31*pi*t)+0.5sin(62*pi*t)+0.1sin(124*pi*t)
Derive an equation for the relationship between electric field in a homogeneous volume of tissue and specific absorption rate (SAR) of radiofrequency power.
Derive an equation for the relationship between electric field in a homogeneous volume of tissue and specific absorption rate (SAR) of radiofrequency power. Assuming a conductivity of the tissue of 1S/m, what electric field corresponds to an SAR of 1W/kg?
1. Wavelength of particles a. Consider a dust particle of diameter d =1 micron, mass m= 10^-15 kg, and speed v = 1 mm/s. Calculate the de Broglie wavelength of the particle and compare with the particle's size. b. Now consider a thermal neutron, i.e, a neutron (m=1.67 x 10^-27 kg) with a speed corresponding to the average the
I need help with the following two problems in the attachment. How do I tell if velocity and acceleration are positive, negative or zero? Please see the attached file. Thanks
Please see instructions on attachment. Please solve each and give a complete detailed step by step solution to solving each problem no matter how easy. I am trying to learn and not an expert. Give answer and way to solve. Adult student trying to make my way through all this and need your help! 1) A flat circular plate o
The vertical displacement of a string is given by y(x,t) = (6.00mm) cos[(3.25m to the power of (-1)) x - (7.22 s to the power of (-1))t]. What is the wavelength of the wave?
The position of a mass that is oscillating on a spring is given by x=(18.3 cm) cos[(2.35s to the power of -1)t]. What is the freqency of this motion?
An X-ray machine operates from a 220V supply. The machine power is 800W and the supply must also supply six 24W, 220V indicator lights. Please answer all questions with full explanations thankyou 1) What is the total power required? 2) What is the current drawn from the 220V supply? 3) A transformer with 250 turns in
What properties of a laser beam are used in: (a)holography- (b)punching holes in baby bottle (c)monitoring location of the crater of a dormant volcano by interferometry- (d)laying straight railroad tracks-
The intensity of a particular earthquake wave is measured to be 2.09à?106 W/m2 at a distance of 123 km from the source. What was the intensity when is passed a point only 4.39 km from the source? Give answer in W/m2.
Find the equivalent resistance between points a and b? Find the power dissipated by the resistor identified with a star.
Refer to attached picture file. Each resistor in the following circuit is 6.00 ohms. What is the equivalent resistance between points a and b? Find the equivalent resistance of the resistors between points a and b. Find the power dissipated by the resistor identified with a star.
The noise from a helicopter rotor is distributed equally in all directions. If the rotor generates 70 watts of sound power, find the intensity level of the sound in dB on the ground directly beneath the helicopter when its altitude is 120 m. Also find the altitude in meters for the sound to be reduced to 60 dB at the same locati
It was stated that around the turn of the 20th century some researchers discovered that radium generated heat. Assuming that you have a pure 1 Ci sample of Ra-226, what is the maximum potential power (in Watts) that you could recover (at 100% efficiency) from this sample.
What is the power of a sound wave (B = 32 dB) passing through an area of 12.5 cm ^2? Suppose the same sound wave passes through an area of 25 cm^2. What is its intensity level?
Hi. Can someone please show me how to do the following problem? "The medium-powered objective lens in a laboratory microscope has a focal length f-objective = 4.00 mm. (a) If this lens produces a lateral magnification of -40.0, whiat is the distance from the object to the objective lens? (b) What is the focal length of an ey
A wire 1.2 m long and 0.4 mm diameter has a resistance of 4.9. Calculate the resistance of another wire of the same material whose length is 0.8 m and diameter is 0.24 mm.
Please see attached for diagram. If points A and B in the figure below are connected to a 10 V battery, what is the power dissipated in each of the resistors assuming that R = 65 ohms. 12 ohms resistor : 55 ohms resistor : 65 ohms resistor :
A turboprop producing 1000 kW drives a propeller operating at 85% propulsive efficiency. If the fuel flow to the engine is 0.07 kg/s, determine the overall thermal efficiency of the engine.