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2 years ago

Select the correct answer

Physics

1 answer:

DiKsa [7]2 years ago

7 0

Answer:

C or 3

Explanation:

A: no they are called sources of sound. A is incorrect.

B: It does. Many people attest to this. But this is not a property of physics.

C: A media is required is the correct answer.

D: Dogs might. In general we don't.

I would pick C

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What three sources does the human body use to provide energy for moderate physical activities

Mazyrski [523]

Answer:

Carbohydrate, Fat and Protein

Explanation:

3 0

3 years ago

A snail crawls at a speed of 0.0004 m/s. How long will ot take to climb a garden stick 1.6m high?

tekilochka [14]

4000 seconds

Explanation:

speed = distance / time

0.0004m/s = 1.6m / time

Subject time

time = 1.6 / 0.0004

time = 4000 seconds.

Hope this helps. Mark as brainliest if possible. tks

5 0

3 years ago

An ideal transformer has 60 turns in its primary coil and 360 turns in its secondary coil. If the input rms voltage for the 60-t

notka56 [123]

Answer:

720 V

Explanation:

Given that,

The number of turns in primary coil, N₁ = 60

The number of turns in secondary coil, N₂ = 360

The input rms voltage, V₁ = 120 V

We need to find the output rms voltage of the secondary coil . The relation between number of turns in primary coil - secondary coil to the input rms voltage to the output rms voltage is given by :

$\dfrac{N_1}{N_2}=\dfrac{V_1}{V_2}\\\\V_2=\dfrac{N_2V_1}{N_2}\\\\V_2=\dfrac{360\times 120}{60}\\\\V_2=720\ V$

<h3>So, the output rms voltage of the secondary coil is 720 V. Hence, the correct option is (b).</h3>

7 0

2 years ago

If there was a natural disaster and the people that were in this disaster were supposed to be there. There were 3 people in the

Bond [772]

A thunder bolt and lightning strike wouldn't do anyone any favours and might well account for the mess and the broken windows ...

4 0

3 years ago

A hot rod can accelerate from 0 to 60 km/h in 5.4 s.

mylen [45]

Answer:

<h2>a) Acceleration is 3.09 m/s²</h2><h2>b) Distance traveled is 45.05 m</h2><h2>c) Time taken to travel 250 m is 12.72 s</h2>

Explanation:

a) We have equation of motion v = u + at

Initial velocity, u = 0 km/hr = 0 m/s

Final velocity, v = 60 km/hr = 16.67 m/s

Time, t = 5.4 s

Substituting

v = u + at

16.67 = 0 + a x 5.4

a = 3.09 m/s²

Acceleration is 3.09 m/s²

b) We have equation of motion s = ut + 0.5 at²

Initial velocity, u = 0 m/s

Acceleration, a = 3.09 m/s²

Time, t = 5.4 s

Substituting

s = ut + 0.5 at²

s = 0 x 5.4 + 0.5 x 3.09 x 5.4²

s = 45.05 m

Distance traveled is 45.05 m

c) We have equation of motion s = ut + 0.5 at²

Initial velocity, u = 0 m/s

Acceleration, a = 3.09 m/s²

Displacement, s = 0.25 km = 250 m

Substituting

s = ut + 0.5 at²

250 = 0 x t + 0.5 x 3.09 xt²

t = 12.72 s

Time taken to travel 250 m is 12.72 s

6 0

3 years ago