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lana66690 [7]
2 years ago
10

Which scientist first proposed physical laws to mathematically describe the effect of forces on the motions of bodies?

Physics
2 answers:
Basile [38]2 years ago
6 0

Answer:

Issac Newton!

Explanation:

Hope this helps.

vodomira [7]2 years ago
3 0

Answer: Isaac Newton

Explanation:

Isaac NewtonThe three laws of motion were first compiled by Isaac Newton in his Philosophiæ Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), first published in 1687. Newtonused them to explain and investigate the motion of many physical objects and systems.Feb 21, 2017

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A vacuum cleaner produces sound with a measured sound level of 75.0 dB. (a) What is the intensity of this sound in W/m2? W/m2 (b
jonny [76]

Answer:

Part a)

I = 3.16 \times 10^{-5} W/m^2

Part b)

P_o = 0.162 Pa

Explanation:

Part a)

Level of sound = 75 dB

now we know that

L = 10 Log\frac{I}{I_0}

here we know that

I_0 = 10^{-12} W/m^2

now we have

75 = 10 Log(\frac{I}{10^{-12}})

I = 3.16 \times 10^{-5} W/m^2

Part b)

Intensity of sound wave is given as

I = \frac{1}{2}\rho A^2\omega^2 c

here we know that

A = \frac{P_o}{Bk}

so we have

I = \frac{1}{2}\rho(\frac{P_o}{Bk})^2\omega^2 c

I = \frac{1}{2}\rho P_o^2 \frac{c^3}{B^2}

now we know

\rho = 1.2 kg/m^3

c = 340 m/s

B = 1.4 \times 10^5 Pa

now we have

3.16 \times 10^{-5} = \frac{1}{2}(1.2)P_o^2\frac{340^3}{(1.4\times 10^5)^2}

P_o = 0.162 Pa

5 0
3 years ago
The particles in an object move in (many/ two directions)
pentagon [3]

Answer:

They are negitive

Explanation:

Im pretty sure

8 0
3 years ago
This table shows four examples of experiments.
yarga [219]

Answer

32000

Explanation:

120394

5 0
3 years ago
Read 2 more answers
Where does the energy that is used to ride a bicycle up a hill come from and how is it classified?
MariettaO [177]
Well when you eat you get energy and then you use it to ride up the hill sorry I don't know how it is classified
7 0
3 years ago
Read 2 more answers
The Jensens dccided to spend their family vaeation white water rafting. During one segment of their trip down the river, the raf
torisob [31]

Answer:

24,187.04 J ≈ 24,200 J

Explanation:

mass (m) = 544 kg

initial speed (u) = 6.75 m/s

final speed (v) = 15.2 m/s

change in height (Δh) = -14 m (negative sign is because there is a decrease in height )

acceleration due to gravity (g) = 9.8 m/s^{2}

How much work was done on the raft by non conservative forces?

work done = change in energy of the system = change in kinetic energy + change in potential energy

work done = (0.5m(v^{2} -u^{2} )) + (mgΔh)

work done = (0.5x544x(15.2^{2} -6.75^{2} )) + (544 x 9.8 x (-14))

work done = 50449.76 - 74,636.8

work done = 24,187.04 J ≈ 24,200 J

7 0
3 years ago
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