An Carnot engine absorbs heat at high temperature 800 Kelvin and efficiency of the Carnot engine is 50%. What is the high temperature to increase efficiency to 80% if the low temperature kept constant. answer: High Teamp = 2000k

Q: Liquid 57.0 Question : A ray of light passes from glass into a liquid, as shown in the figure. What…

A:

Q: An elevator car of mass 815 kg falls from rest 2.80 m, hits a buffer spring, and then travels an…

A:

Q: Objects with Masses of 210 Ky and a 510 kg are separated by o. 32m @ Find the aet gravitational…

A:

Q: Light in vacuum is incident on the surface of a slab of transparent material. In the vacuum the beam…

A:

Q: A motorcyclist starts from rest and reaches a speed of 28 m/s after travelling with uniform…

A: Given data :     Initial  Velocity   =   u    Final  velocity   =   v      Time   =   t          To…

Q: An irregularly shaped object weighs 10.50 N in air. When immersed in water, the object has an…

A: In this question we have to find out the density of the object with the help of the above…

Q: Determine the value of force applied if work done is 202 J and value of displacement is 2.5 m

A: Given W= 202 J S= 2.5 m

Q: A particle was subjected to a force Fx that varies with position as described by the Fx vs. graph…

A:

Q: 2. In a vacuum, light with a frequency of 5.0 x 1014 hertz has a wavelength of (1) 6.0 × 10-21 m (2)…

A:

Q: A car is moving on a straight road 23 m/s. It is acceleration at 30 m/s2. What will be it's velocity…

A: Given that, Initial velocity of car, u = 23 m/s Acceleration of car, a = 30 m/s2 Time taken, t = 6…

Q: 9. When a load of 10 kg is hung from the wire, then extension of 2 m is produced. Then work done by…

A:

Q: A sample of silver contains 5.00 micrograms of Ag-105.  Determine the activity of the sample in…

A:

Q: The lens and mirror in the figure below are separated by 1.00 m and have focal lengths of +80.9 cm…

A:

Q: 3. A 5.00 cm tall light bulb is placed at a distance of 43.7 cm from a concave mirror having a focal…

A: Given data as per question height of object   =   5cm object distance  =   43.7cm focal length  =…

Q: A small ferryboat is 4.50 m wide and 6.10 m long. When a loaded truck pulls onto it, the boat sinks…

A:

Q: A block with mass m =6.5 kg is hung from a vertical spring. When the mass hangs in equilibrium, the…

A:

Q: A 195-kg load is hung on a wire of length of 3.40 m, cross-sectional area 2.00 x 10 5 m2, and…

A: Mass hung =195kg Length of wire =3.4m Cross section =2×10-5 m2 Young's moduls = 8×1010 N/m2

Q: A rigid rod of length L= 1 m and mass M = 2.5 kg is attached to a pivot mounted d = 0.17 m from one…

A:

Q: Ceiling M 7) If M = 20 kg what is the F; equal to? a) 196 N b) 20 N c) ON d) 98 N Rope

A:

Q: The lens and mirror in the figure below are separated by 1.00 m and have focal lengths of +80.9 cm…

A:

Q: 'f there is a net nonzero force on a moving object, can the total work done on the object be zero?…

A: Given that- A net non zero force on a moving object   To determine that- Can the total work done on…

Q: A 220V 600-watt electric coffee maker is used to make a total of 10 cups of coffee in 45 minutes.…

A: Given: The supply voltage is 220 V. The electric power is 600 W. The time is 45 min. The number of…

Q: An earthquake has an amplitude of 7,000 micrometers and a period of 0.07 second. Find its measure on…

A:

Q: Which of the following are true?   I. In a ferromagnet, permanent atomic magnetic moments tend to…

A: In a ferromagnet, permanent atomic magnetic moments tend to align parallel to each other even in…

Q: your answers legibly, co sheet of paper, What is its average acceleration? to a ston in 3 0s

A: Activity-3.4 Part (1): Given:The intial velocity is 4 m/s. The final velocity is 36 m/s. The time…

Q: A car of mass 1000kg travelling at 36 km/h is brought to rest over a distance of 20m. Find a)…

A: Given Mass of car = 1000 kg Initial velocity = u = 36 km/h  Final velocity = 0 Distance moved = 20 m…

Q: A billiard ball moving at a speed of 2.2 m/s strikes an identical stationary ball a glancing blow.…

A:

Q: Thank you! The fundamental frequency of an organ pipe, closed at one end, is 258.3 Hz. a) What…

A:

Q: simple pendulum is suspended from the ceiling by means of a string of length 2.23 m. Assume that…

A:

Q: A person looking into an empty container of depth h = 16 cm can see up to a distance d = 14 cm as…

A:

Q: A girl with a mass of 55.9 kg is wearing high heeled shoes and standing balanced on one foot. The…

A:

Q: 1. The total charge entering a terminal is given by q = 2e3 cos (6rt), in µC. Determine the current…

A:

Q: If a bus travelling at 18 m/s is subjected to a steady deceleration of 3 m/s?, how long will it take…

A:

Q: Given below are the distance graphs of a large ball made of entangled rubber bands and a man dropped…

A: We generally calculate two types of velocities. One is average velocity and other is instantaneous…

Q: Refraction causes objects submerged in water to appear less deep than they actually are. The fish in…

A:

Q: n ideal gas with energy E = NKBT is subjected to a cyclic, quasi-static (i he figure. What is the…

A: An ideal gas with energy E = 52NkBT is subjected to a cyclic, quasi-static (i.e. reversible) process…

Q: A car is moving on a straight road 23 m/s. It is acceleration at 30 m/s2. What will be it's velocity…

A: Given data :        Acceleration   =   a       Initial velocity   =   u        Time    =    t…

Q: Mass of a body is 3 kg What is it's weight ?

A: Given data :     Acceleration  due to gravity   =   g      Mass  of  the  body    =   m        To…

Q: An athlete puts a​ 16-lb shot at an angle of 60° to the horizontal from 6 ft above the ground at…

A: Clearly throwing ball is a case of projectile moton . And thus the question is to find the time of…

Q: Consider a see-saw with a total length of 8 m. A child with a mass of 31 kg sits on the very end of…

A: The free-body diagram of the see-saw is shown below.

Q: In the circuit shown, the potential difference R, VA = V8 = 16.0 V and the resistance R = R2 = R3 =…

A:

Q: Question 2: Two current-carrying wires are oriented parallel to each other, as shown in the diagram…

A: Given data:  Two current carrying wires Parallel to each other The direction of current in both…

Q: Metal sphere A is initially neutral, It is connected by a metal wire to the ground. A positively…

A: Introduction :- Here it is given that a metal sphere A is neutral and connected by a metal wire to…

Q: Standing waves from on a 0.4 m long string (both ends fixed) when it is plucked. The string is 800 N…

A: Given: The length of the string is 0.4 m. The tension in the string is 800 N. The density of the…

Q: (8c12p13) Forces F1, F2, and F3 act on the structure depicted in the figure, shown in an overhead…

A: Given  a = 1.9 m, b = 2.7 m, C = 1.05 m, F1 = 24.10 N, F2 = 12.85 N, and F3 = 4.65 N. To Find Fh,…

Q: train upon passing point A at a speed of 72 kph accelerates at 0.75 m/s2 for 1 minute along a…

A:

Q: 2 Te ? lc000 N Find TA, TB

A:

Q: OK, once again we have a pendulum, this time of length 1.49 m, which you release from rest at an…

A: GIVEN The length of the pendulum = 1.49 m pendulum release from rest at an angle of 41.6 degrees to…

Q: Determine the acceleration of a dinosaur that starts from rest and runs 79.2m in 8.1 seconds.

A:

Q: What is the speed of sound in benzene, which has a bulk modulus of 1.05 x 10^9 Pa and a density of…

A: Given data:  Bulk modulus (β) = 1.05×109 Pa Density (ρ) = 8.76×102 kg/m3 Required: The speed of…