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Andrew [12]
3 years ago
7

Science fair ideas??? please help

Physics
2 answers:
Makovka662 [10]3 years ago
7 0
Volcano xD it was pretty cool and easy if that's what you want or a rocket using pesticidE as the rocket fuel. or search for more online cx
Rasek [7]3 years ago
5 0
Just put coins or something like that into different liquids and examine the corrosion between them. Hope this helped ;)
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<span>A. frustration-aggression theory.
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3 years ago
A 4.00 kg block is suspended from a spring with k 500 N/m. A 50.0 g bullet is fired into the block from directly below with a sp
Yanka [14]

Answer:

a. A = 0.1656 m

b. % E = 1.219

Explanation:

Given

mB = 4.0 kg , mb = 50.0 g = 0.05 kg , u₁ = 150  m/s , k = 500 N / m

a.

To find the amplitude of the resulting SHM using conserver energy

ΔKe + ΔUg + ΔUs = 0

¹/₂ * m * v²  -  ¹/₂ * k * A² = 0

A = √ mB * vₓ² / k

vₓ = mb * u₁ / mb + mB

vₓ = 0.05 kg * 150 m / s / [0.050 + 4.0 ] kg = 1.8518

A = √ 4.0 kg * (1.852 m/s)²   /   (500 N / m)

A = 0.1656 m

b.

The percentage of kinetic energy

%E = Es / Ek

Es = ¹/₂ * k * A² = 500 N / m * 0.1656²m = 13.72 N*0.5

Ek = ¹/₂ * mb * v² = 0.05 kg * 150² m/s = 1125 N

% E = 13.72 / 1125 = 0.01219 *100

% E = 1.219

6 0
3 years ago
How does the thermoflask prevent heat loss​
riadik2000 [5.3K]

Answer:

The way that the flask is built it has 3 protective layers.... the inside layer to keep the heat in, the outside layer to reflective the cold, and a vacuum layer, which is an empty layer that limits conduction and convection

Explanation:

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A natural atom can be negatively charged by
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Answer:

By Gaining Electrons

Explanation:

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4 0
2 years ago
Read 2 more answers
ASAP
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Answer:

A

Explanation:

Hooke's law! F(spring)=-kx

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5 0
3 years ago
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