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3 years ago

In the problem below, what is the student showing?

Physics

1 answer:

Phantasy [73]3 years ago

6 0

Answer:

S<em>tudent showing the volume of cube</em>

V = a³

if a = 3 cm

Then volume is a³ = 3 ×3 × 3

= 27 cm³

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Use Eq. cosϕ=R/Z to show that the average power delivered by the source in an L−R−C series circuit is given by Pav = I^2rmsR .

Evgen [1.6K]

Answer:

Explanation:

In a L C R circuit, the average power is given by

$P_{av}=V_{rms}I_{rms}Cos\phi$

As given in the question

CosФ = R / Z

And we know that

$V_{rms}=I_{rms}\times Z$

$P_{av}=I_{rms}\times Z\times I_{rms}\times \frac{R}{Z}$

$P_{av}=I_{rms}^{2}\times R$

6 0

3 years ago

The beginning of the Phanerozoic is marked by what occurrence

Sergio039 [100]

The beginning of the Phanerozoic is marked by the development of hard body parts, such as shells and bones.

3 0

4 years ago

What is the density of a substance that has a mass of 20 g and a volume of 10mL

jenyasd209 [6]

Answer:

Density =mass/volume 20/10=2

4 0

3 years ago

A car of mass 487 kg travels around a flat, circular race track of radius 53.3 m. The coefficient of static friction between the

aleksklad [387]

Answer:

9.96 m/s

Explanation:

mass of car, m = 487 kg

radius of track, R = 53.3 m

coefficient of static friction, μ = 0.19

acceleration due to gravity, g = 9.8 m/s^2

let v be the maximum speed so that the car can go without flying off the track.

The formula for the maximum speed is given by

$v_{max}=\sqrt{\mu Rg}$

$v_{max}=\sqrt{0.19\times53.3\times9.8$

vmax = 9.96 m/s

8 0

3 years ago

kiruha [24]

Answer:

The given figure shows two men M and N facing two flat and hard walls, wall 1 and wall 2. Man N fires a gun. Man M hears two echoes, one from wall 1 and second from wall 2. The speed of sound in

air is given to be 325 m/s. After the firing of the gun by the man N, the man M will hear the first echo in how many seconds?

5 0

2 years ago