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jek_recluse [69]
4 years ago
13

If the faster stone takes 12.0 s to return to the ground, how long will it take the slower stone to return?

Physics
1 answer:
iren [92.7K]4 years ago
5 0
Same speed, because mass is neglected. The things that affect the speed are the distance and speed of the rock.
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Calculate the wavelength when the frequency of 40,000 Hz travelling at 1450 m/s in fatty tissue.
dybincka [34]

Answer:

0.036m

Explanation:

Given parameters:

Frequency  = 40000Hz

Speed  = 1450m/s

Unknown:

Wavelength = ?

Solution:

To solve this problem, we use the wave velocity equation:

            V  = F ∧  

V is the velocity

F is the frequency

∧ is the wavelength

  Now insert the parameters and solve;

             1450  = 40000 x ∧

                 ∧ = 0.036m

4 0
3 years ago
A cyclist accelerates from 0 m/s [S] to be 15 m/s [S] in 4 s. What is his acceleration?
kotegsom [21]
15/4 = 3.75 m/s2. Do not try this formula all the time. This is an exception
6 0
3 years ago
In a series RCL circuit the generator is set to a frequency that is not the resonant frequency.
Pani-rosa [81]

Answer: 624 Hz

Explanation:

If the ratio of the inductive reactance to the capacitive reactance, is 6.72, this means that it must be satified the following expression:

ωL / 1/ωC = 6.72

ω2 LC = 6.72 (1)

Now, at resonance, the inductive reactance and the capacitive reactance are equal each other in magnitude, as follows:

ωo L = 1/ωoC → ωo2 = 1/LC

So, as we know the resonance frequency, we can replace LC in (1) as follows:

ω2 / ωo2  = 6.72  

Converting the angular frequencies to frequencies, we have:

4π2 f2 / 4π2 fo2  = 6.72

Simplifying and solving for f, we have:

f = 240 Hz  . √6.72 = 624 Hz

As the circuit is inductive, f must be larger than the resonance frequency.

8 0
4 years ago
Give your answer with solution(Easy Question)
Furkat [3]

Volume of any rectangular prism is (length) x (width) x (height).

The box in the picture is definitely a rectangular prism, so its volume is

(length) x (width) x (height) .

That's (4.0 cm) x (6.0 cm) x (2.0 cm) = 48 cm³ .

So the volume of the box is 48 cm³ fer sher, but that's NOT the preferred answer to this question.  If you take your time and read all the fine print carefully, you'll see that this sneaky question wants the answer in units of meter³ .  In order to produce the answer that it's fishing for, YOU have to be sneaky too.  You have to convert units, either before you start doing the calculating, or else convert the units of your result before you choose the answer from the list.

Before you calculate: Convert the given dimensions to (meters).  Then

Volume = (0.04 m) x (0.06 m) x (0.02 m)

Volume = 0.000048 m³

<em>Volume = 4.8 x 10⁻⁵ m³</em>


After calculating but before picking the answer:

Volume = (4.0 cm) x (6.0 cm) x (2.0 cm)

Volume = (48 cm³)

Convert:

Volume = (48 cm³) x (1 meter / 100 cm)³

Volume = (48 cm³) x (1 meter³ / 10⁶ cm³)

Volume = (48 cm³ meter³ / 10⁶ cm³)

Volume = 48 x 10⁻⁶ m³

or

<em>Volume = 4.8 x 10⁻⁵ m³</em>

This is exactly the same number as 48 cm³, but this is the way they want to see it, and 48 cm³ isn't.  So you have to select choice - <em>D .</em>


5 0
3 years ago
Charlie is investigating friction. She will use the same amount of force to push two wooden balls across two level surfaces. The
Zanzabum
D the distance for trial 3 will be greater than trial 4
4 0
3 years ago
Read 2 more answers
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