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ddd [48]
3 years ago
8

"A simple heat engine works by extracting heat from the hot reservoir, which is then converted into mechanical work, then unconv

erted heat is exhausted to the atmosphere"
True or false​
Physics
1 answer:
Elanso [62]3 years ago
6 0
Umm no se nada perón
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The Earth orbiting the Sun is an example of circular motion. What is the name of the force involved?
Fiesta28 [93]
The force involved in the orbiting of the earth is gravity!
5 0
4 years ago
A small grinding wheel has a moment of inertia of 4.0*10-5kgm2. What net torque must be applied to the wheel for its angular acc
kvv77 [185]

Hi there!

We can use the rotational equivalent of Newton's Second Law:

\huge\boxed{\Sigma \tau = I \alpha}

Στ = Net Torque (Nm)

I = Moment of inertia (kgm²)

α = Angular acceleration (rad/sec²)

We can plug in the given values to solve.

\Sigma \tau = (4 * 10^{-5})(150) = \boxed{0.006 Nm}

4 0
3 years ago
Find the de broglie wavelength of an electron in the ground state of the hydrogen atom.
HACTEHA [7]

de Broglie wavelength (λ) is given by the equation

λ = h/p

where h=Planck’s constant whose value is 6.62 x 10^(−34) joule-seconds and

p = momentum of the particle(here electron)

In terms of kinetic energy(E) momentum(p) can be written as,

p=(2mE)^1/2

where m=mass of the particle.

Hence λ becomes

1 λ = h(2mE)^-1/2

Given here, E = 13.6 eV = 13.6×1.6×10^-19 joule

m(mass of electron)= 9.1×10^-31 kg

Putting these values in equation (1) we get ,

λ =0.332×10^(-9) meter

=3.32×10^(-10) meter

=3.32 Å

5 0
3 years ago
Read 2 more answers
The position x of a particle moving along x axis varies with time t as x = Asin(wt) , where A and w are constants . The accelera
Elodia [21]

Let's see

\\ \rm\Rrightarrow x=Asin(\omega t)\dots(1)

Now we know the formula of acceleration

\\ \rm\Rrightarrow \alpha=-A\omega^2sin(\omega t)

\\ \rm\Rrightarrow \alpha=-Asin(\omega t)\times \omega^2

  • From eq(1)

\\ \rm\Rrightarrow \alpha=-x\omega^2

Or

\\ \rm\Rrightarrow \alpha=-\omega^2x

6 0
2 years ago
Read 2 more answers
Does the size of the magnetic field change with the size of the magnet?
mestny [16]

Answer:

Not all of the time, it can also depend on the strength of the magnet.

Explanation:

say you have a small very strong magnet, that might work just as well as a large but week magnet.

4 0
3 years ago
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