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Travka [436]
3 years ago
6

The fourth harmonic on a string fixed at both ends shows

Physics
1 answer:
Charra [1.4K]3 years ago
8 0

Answer:

I believe the answer is B) Two wavelengths

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A 80 kg block starts from rest at the top of a 15m frictionless ramp. The block slides down the frictionless ramp onto a rough h
Nadusha1986 [10]

Answer:

W(fric) = -12000 J

Explanation:

Given that

mass ,m= 80 kg

Initial speed ,u= 0 m/s

Height ,h= 15 m

Final speed ,v= 0 m/s

We know that

Work done by all the forces = Change in the kinetic energy

W_{gravity}+W_{fric}=\dfrac{1}{2}mv^2-\dfrac{1}{2}mu^2

W_{gravity}+W_{fric}=\dfrac{1}{2}m\times 0^2-\dfrac{1}{2}m\times 0^2

W_{gravity}+W_{fric}=0

W(fric)= - m g h

W(fric) = - 80 x 10 x 15     ( g=10 m/s²)

W(fric) = -12000 J

negative sign indicates that force and displacement is in opposite direction.

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3 years ago
A star's life is a battle between what two forces?
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A solid cylinder with radius 0.160 m is mounted on a frictionless, stationary axle that lies along the cylinder axis. The cylind
agasfer [191]

Answer:

we have τ = I * α as the rotational equation of motion

and we also have τ = F * r

so the torque τ = 5* 0.16 Nm = 0.8 Nm

from your plot of θ vs T^2  , calculate the slope of the line

this slope will be angular acceleration α.

Then you get I = τ/α

Explanation:

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3 years ago
Can someone please give me the answers to this? ... please ...
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3. 2 meters per second 4. i think object 7. i’ll try to figure it out 8. .77 9. 25km 10. 10m each second
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A woman can lift barrels a vertical distance of 1 meter or can roll them up a 2-meter long ramp to the same elevation. If she us
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answer is 1/2 as much force required

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