10.

Physics

1 answer:

Ronch [10]3 years ago

8 0

Answer is D not A! If there was no friction, an object would never decelerate, it would continue moving forever

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An unnamed professor is walking to class when an office chair (travelling in the same direction) collides with them. The profess

ololo11 [35]

Answer: 1.96 m/s

Explanation:

Given

Mass of Professor $m_1=113\ kg$

Velocity of professor $u_1=1.56\ m/s$

mass of chair $m_2=10\ kg$

velocity of chair $u_2=6.5\ m/s$

Suppose after the collision, v is the common velocity

Conserving momentum

$\Rightarrow m_1u_1+m_2u_2=(m_1+m_2)v\\\\\Rightarrow v=\dfrac{113\times 1.56+10\times 6.5}{113+10}=\dfrac{241.28}{123}\\\\\Rightarrow v=1.96\ m/s$

5 0

3 years ago

What is carnot engine.express the relation for its efficiency?

patriot [66]

Answer:

Explanation:

The Carnot cycle is a special case of a thermodynamic cycle that produces an ideal gas and consists of two isothermal processes and two adiabatic processes. This cycle is a theoretical solution given by Sadi Karnot to refine heat engines for their efficient use.

The formula for the coefficient of efficiency is:

η = (Q₁ - Q₂) / Q₁ = (T₁ - T₂) / T₁

Where Q₁ is is the amount of heat of the heater supplied to the working body and Q₂ is the amount of heat that the working body transfers to the refrigerator according to this T₁ is the temperature of the heater T₂ is the temperature of the refrigerator.

This formula provides a theoretical limit for the maximum value of the coefficient of efficiency of heat engines.

God is with you!!!

6 0

4 years ago

Read 2 more answers

Through what angle in degrees does a 33 rpm record turn in 0.32 s?<br> 63°<br> 35°<br> 46°<br> 74°

Darina [25.2K]

Answer:

1 rev = 2(pi) rad pi(rad) = 180 degrees

so 33 rev/min * 1 min/60s * (2*pi)rad/1 rev *180 deg/ pi rad * .32 s = 63.36 degrees

Explanation:

63.36 estimated to 63 so 63