Calculate the efficiency of a heat engine which takes in 7 million Joules of energy into the hot reservoir and transfers 4 million Joules of energy to the cold reservoir.

Q: During a thunderstorm the electric field at a certain point in the earth's atmosphere is 1.09 105…

A: Given Data:-  The Electric field E = 1.09 x 105 N/C  The mass of the ice piece is m = 1.10 x 10-4 g…

Q: A boxcar without a front or a back is moving toward the right. Two electrons move through the…

A: Answer: The electron going from back to front.

Q: EXPLAIN WHY I1 IS EQUALS TO CURRENT X

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Q: des the funker, whose velocity versus time graph is shown in the Figure, travel in the first 6.5 s?…

A: Average velocity (v) of an object is equal to its final velocity (v) plus initial velocity (u),…

Q: Suppose you want to make a 1.00-F capacitor using two square sheets of aluminum foil. If the sheets…

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Q: Find charge Current=1 A Time=16 s

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Q: Q3/A particle moving along a straight line is subjected to a deceleration a = (- V) m/s², where is V…

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Q: 1. Martha is pulling a 2 kg box upward by a cord. The tension on the rope is 24 N. What is the…

A:

Q: An has a multistrand Car is is out, and at Just lifting the first floor electric elavator a motor at…

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Q: Calculate the mass of a van that drives at 40 m/s and has 500000 J of energy.

A: Given: The kinetic energy of the van is 500000 J. The speed of the van is 40 m/s.

Q: The motion of particle is defined by the relation -t-lot² +8+ +12, where X and t are expressed in…

A:

Q: A beam of light, in air, is incident at an angle of 66° with respect to the surface of a certain…

A: angle of incidence = 660 speed of light in liquid = 2.3 x 108 m/s

Q: In a physics laboratory experiment, a coil with 200 turns enclosing an area of 11.4 cm² is rotated…

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Q: A uniform meter stick has a 45.0 g mass placed at the 20 cm mark. If a pivot is placed at the 42.5…

A: Given: The mass of the object is 45 g. The length of the stick is 100 cm.

Q: If you add 400 J of heat to a system so that the final temperature of the system is 200 K, what is…

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Q: Question 3/ Calculate the density of the nuclear substance of the nucleus of the Carbon-12 atom, if…

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Q: A person is falling from a certain height. Which of the following is likely to happen?   if he…

A: If he falls on concrete floor then there's sudden change in his momentum resulting in higher…

Q: A 2.12 x 10-9 C charge has coordinates x = 0, y = -2.00; a 3.03 x 10-9 C charge has coordinates x =…

A: Electric field due to point charge is given as E =kQr3r→

Q: 50.0⁰ 37.0⁰ A (12.0 m) 40.0⁰ -X

A: A = 12 m angle = 37 degrees

Q: A particle is dropped from height h under gravity; the force of air resistance is proportional to…

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Q: The linear speed of an object swinging in a circular path of radius 2 m with a frequency of 5 rev/s…

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Q: gold foil. He unexpectedly with then current models of atomic In 1910 Rutherford performed a classic…

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Q: A bicycle wheel of radius r = 1.5 m starts from rest and rolls 10 m without slipping in 30 sec.…

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Q: A wave is modeled by the wave function y(x,t) = (0.31m) sin[(2π/4.68m)(x-(14.03m/s)t)]. What is the…

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Q: Current might flow in two different manners. what are they?

A: Electrical current exists in two types: alternating current (AC) and direct current (DC). DC current…

Q: How many nodes are shown in the wave below?

A: Given  waves are shown in the figure We have to find how many node is present.

Q: In the given figure below, a 3.0 -kg block is sliding down a 60 degrees-rough incline. The speed of…

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Q: If a 15C charged particle is traveling perpendicularly to a magnetic field of 8T at a speed of 2…

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Q: Diffraction Using the small angle approximation, the locations of maxima is given by Ld Xm Y yL Xm d…

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Q: An object is placed 12cm from a converging lens and the image appears at 24cm on the opposite side…

A: Given: The distance of the object from the lens is 12 cm. The distance of the image from the lens is…

Q: timate the distance between Venus and Earth in km and AU. Express your answer using two significant…

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Q: Determine acceleration Initial velocity=4.65 m/s Final velocity=2 m/s Time=2 s

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Q: In a boat race, boat A is leading boat 8 by 50 m and both boats are traveling at a constant speed of…

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Q: Calculate the value of force Pressure=10 N/m2 Area=2 m2

A: Given : Pressure (P) = 10 N/m2 Area (A) = 2 m2

Q: An airplane used to drop water on brushfires is flying horizontally in a straight line at 180 mi/h…

A: The horizontal component of the initial velocity,vix=180 mi/h  Vertical displacement,yt-y0= 300 ft…

Q: Determine the moment of the force F about point A.

A:

Q: A piece of wire of length 1.00 m is cut into two parts, one of which is bent into a shape of a…

A: GivenA piece of wire of length 1.00 m is cut into two parts

Q: to stretch it to 45cm. What is the spring constant? How much work is required to extend it from 34…

A: If the spring is extended or stretched to x length then the force F=-kx....................(1) this…

Q: A vertical 27-cmcm-long spring has its bottom end attached to the tabletop. If a 3.0 kgkg box is put…

A: Given Length of the spring is l0=27 cm=0.27 m Mass of the box is m1=3.0 kg The spring compresses to…

Q: he red light emitted by a helium-neon laser has a wavelength of 632.8 mm. What is the frequency of…

A: Given: The wavelength of red light is 632.8 nm.

Q: How many coils must a loop have with a cross-sectional area of 0.50m? that is pulled through a…

A:

Q: Determine acceleration

A: Given data : Initial velocity=U Final velocity=V Time=t   To find : Acceleration

Q: Two blocks are released from the positions shown in the diagram. Block 1 has a mass of 4.28 kg and…

A: From conservation of total energy Sum of kinetic energy + Potential energy is constant

Q: Problem 1. Consider the "Lightning Plasma Ball" pictured below. The diameter of the central sphere…

A: Plasma is a good conductor of electricity. Therefore, the central sphere and outer sphere can be…

Q: Which of the following statements best describes the wave below. Select all that apply. A. small…

A: Trough is a  channel used to convey a liquid. And here not showing any trough so there is no…

Q: Khufra works at a spring factory and he was assigned to test a certain spring, whose constant is 50…

A: Given  Data:-  The mass of the object is m = 50 kg  The spring  constant k = 50 N/m  The…

Q: Find the man of object Density - 300 kg/m3 Valime = 0-2m³ 3

A: Given data : Density=ρ Volume=V   Required : Mass

Q: Part C After the switch has been closed a long time, it is opened again. Just after it is opened,…

A: Current through the L-R circuit is given by the expression i =VR2(1-e-RtL)After a long time, t =∞i…

Q: 5. James and Mark are pushing a 100 kg box to the right direction, but the box doesn't move. Mark is…

A:

Q: If a bus travelling at 34 m/s is subjected to a steady deceleration of 8 m/s², how long will it take…

A: Given data:  Initial velocity (Vi) = 34 m/s Acceleration (a) = -8 m/s2  Final velocity (Vf) = 0 m/s…

First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.