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4vir4ik [10]
3 years ago
12

Show your workikkkkkkkk

Physics
1 answer:
Svet_ta [14]3 years ago
6 0

Answer:

Explanation:

F = ma

<u>Assuming</u> the 20° is angle θ measured to the horizontal

mgsinθ - μmgcosθ = ma

g(sinθ - μcosθ) = a

at constant velocity, a = 0

g(sinθ - μcosθ) = 0

   sinθ - μcosθ = 0

                 sinθ = μcosθ

μ = sinθ/cosθ

μ = tanθ

μ = tan20

μ = 0.3639702342...

μ = 0.36

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The law of combining volumes only applies under these conditions EXCEPT :_________.
kenny6666 [7]

Answer:

measured at constant temperature and pressure

Hope this helps :)

3 0
2 years ago
Distance
34kurt

I honestly dont know

8 0
3 years ago
3. The largest asteroid in the solar system is 1 Ceres. It has a mass of 9.3835
Ira Lisetskai [31]

Answer:

2.8351×10^7 N/kg

Explanation:

We know that,

W = mg -------(1)

where W = weight, m = mass, g = gravitational acceleration

Also from Newton's law of gravitation we know that,

F = GMm/r²

Where,

F = gravitational force,

G = universal gravitational constant

M,m = masses of object under gravitational influence

r = distance between the two center of masses.

Here we get

F = (Gm/r²)M -------(2)

From 1 and 2

The acceleration due to gravity = gravitational field intensity

So if you consider the gravitational field intensity at the surface of the asteroid,it is equal to the acceleration due to gravity at the same place.

So we get,

g = (6.67×10^-11)×9.3835×10^20/(47²) = 2.8351×10^7 N/kg

3 0
4 years ago
A 17.3 eV electron has a 0.295 nm wavelength. If such electrons are passed through a double slit and have their first maximum at
4vir4ik [10]

Answer:

0.541 nm

Explanation:

The condition for maxima is,

dsin\theta=m\lambda

Here, m=0,1,2,.....

And d is the slit separation, m is the order of maxima, \lambda is the wavelength.

Given that, the 17.3 eV electron posses a wavelength of

\lambda=0.295 nm\\\\\lambda=0.295\times 10^{-9}m

And the order of maxima is m=1.

And the angle at which first order maxima occur is,  \theta=33^{\circ}.

Put these values in maxima condition while solving for d.

d=\frac{1\times 0.295\times 10^{-9}m}{sin33^{\circ}} \\d=\frac{0.295\times 10^{-9}m}{0.545} \\d=0.541\times 10^{-9}m}\\d=0.541 nm

Therefore, the slit separation is 0.541 nm.

7 0
3 years ago
A satellite is spinning at 0.01 rev/s. The moment of inertia of the satellite about the spin axis is 2000 kg · m2. Paired thrust
enyata [817]

Answer:

Explanation:

Angular velocity of satellite

= 2π x .01

= .02 π rad /s

Initial angular momentum

Moment of inertia x angular velocity

= 2000 x .02 π

= 125.6 unit

Linear impulse produced by each thruster

= 15 N.s

Angular impulse

= 15 x 1.5 = 22.5 unit

Total angular impulse in 30 pulses

= 22.5 x 2 x 30

1350

This angular impulse will add total angular momentum of

1350 unit

So total angular momentum after 30 pulses

= 1350 + 22.5

= 1372.5 unit

So  final angular  velocity

= final  angular momentum / moment of inertia

= 1372.5 / 2000

=   0 .686 rad /s

3 0
3 years ago
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