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Afina-wow [57]
2 years ago
14

A wave that can travel through empty space?

Physics
2 answers:
Gelneren [198K]2 years ago
7 0
B hope this helps (I can be wrong)
timurjin [86]2 years ago
5 0

Answer: B. Mechanical Waves

Explanation:

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A ball moving at positive 3.0 m per s along a table rolls off a table and lands on the ground 2.0 m away. How high was the table
MA_775_DIABLO [31]

consider the motion along the horizontal direction :

v₀ = initial velocity in horizontal direction as the ball rolls off the table = 3.0 m/s

X = horizontal displacement of the ball = 2.0 m

a = acceleration along the horizontal direction = 0 m/s²

t = time taken to land = ?

using the kinematics equation

X = v₀ t + (0.5) a t²

2.0 = 3.0 t + (0.5) (0) t²

t = 2/3


consider the motion of the ball along the vertical direction

v₀ = initial velocity in vertical direction as the ball rolls off the table = 0 m/s

Y = vertical displacement of the ball = height of the table = h

a = acceleration along the vertical direction = 9.8 m/s²

t = time taken to land = 2/3

using the kinematics equation

Y = v₀ t + (0.5) a t²

h = 0 t + (0.5) (9.8) (2/3)²

h = 2.2 m


C 2.2 m

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3 years ago
What inflammatory molecule aids with muscle building and is released when muscles experience microscopic damage?
Reika [66]

Answer:

Cytokines

Explanation:

Cytokines are known as inflammatory molecules which are also proteinous and aid signaling of certain processes and conditions in the body.

They are also normally involved in aiding muscle building and are released when muscles experience microscopic damage which may lead to the muscles being sore.

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Write the percent as a fraction or a mixed number in simplest form. <br><br><br> 7%
svetlana [45]
The actual answer is 7/100
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Raising 100 grams of water from 40 to 60 °C (the specific heat capacity of water is 1
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C. 2000 calories.

Explanation/calculation:

Specific heat capacity = calories / mass * (final temperature - initial temperature)

1 = calories / 100 * (60 - 40)
1 = calories / 100 * 20
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2000 = calories
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3 years ago
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