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Marrrta [24]
3 years ago
8

Scientific laws and theories did not begin as questions and hypothesis? True or false

Physics
1 answer:
Nesterboy [21]3 years ago
8 0

False. That's exactly how scientific theories begin

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How many neutrons does element X if it’s atomic number is 28 and its mass number is 87
Sergeeva-Olga [200]

the answer is 59 neutrons


7 0
3 years ago
2) A swinging motion of a Pendulum of clock is _______
VashaNatasha [74]

Oscillatory motion.(also known as Periodic motion)

Hope it helps...

Regards,

Leukonov/Olegion.

3 0
3 years ago
a 10 kg solid disk of radius 0.5 m is rotated about an axis through its center.the disk accelerates from rest to angular speed o
mezya [45]

Answer:

τ ≈ 0.90 N•m

F =

Explanation:

I = ½mR² = ½(10)0.5² = 1.25 kg•m²

α = ω²/2θ = 3.0² / 4π = 0.716... rad/s²

τ = Iα = 1.25(0.716) = 0.8952... ≈ 0.90 N•m

τ = FR

Now we have the unanswered question of reference frame.

80° from what?

If it's 80° from the radial

F = τ/Rsinθ = 0.90/0.5sin80 = 1.818...  ≈ 1.8 N

If it's If it's 80° from the tangential

F = τ/Rcosθ = 0.90/0.5cos80 = 10.311...  ≈ 10 N

There are an infinite number of other potential solutions

7 0
3 years ago
6. Name two ways in which Faraday's work affects your own life in the twenty-first century.<br><br>​
Gekata [30.6K]

He discovered electromagnetic induction

He found a way to cause an electric current, and that discovery was later applied to many devices we use today.

His inventions transformed the home, farm, and factory

. Electricity eliminated manual labor like pumping water, so that rural families no longer spent hours of their day hauling water to livestock or to the house. Automated systems for tasks like milking cows kept farmers from crippling their hands, and the threat of barn fires from knocked over oil lamps during early-morning milking decreased.

3 0
4 years ago
A 1400 kg car moving +13.7 m/s makes an elastic collision with a 3200 kg truck, initially at rest. What is the velocity of the c
marishachu [46]

Answer:

-13.7m/s

Explanation:

If the car has a mass of 1400kg with a speed of +13.7m/s -> hits [email protected] rest and bounces with an elastic collision:

fm = -fm

Therefore, the speed the car will possess will be at a negative state.

= -13.7m/s

6 0
3 years ago
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