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3 years ago

List 5 signs of a chemical change?

Physics

1 answer:

iris [78.8K]3 years ago

4 0

Answer:

Color, formation, gas, odor,

Explanation:

change are a change in color
formation of a precipitate
formation of a gas
odor change
temperature change

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Jose was out drinking with his friends for nearly the whole night. The next morning he was confused and vomiting, and had a low

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Answer:

He has a hangover.

Explanation:

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2 years ago

_____ is the frictional force needed to slow an object in motion

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Answer:

<u>Drag force</u> is the frictional force needed to slow an object in motion

Explanation:

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3 years ago

Read 2 more answers

In the figure, a weightlifter's barbell consists of two identical small but dense spherical weights, each of mass 50 kg. These w

kondaur [170]

The moment of inertia is $24.8 kg m^2$

Explanation:

The total moment of inertia of the system is the sum of the moment of inertia of the rod + the moment of inertia of the two balls.

The moment of inertia of the rod about its centre is given by

$I_r = \frac{1}{12}ML^2$

where

M = 24 kg is the mass of the rod

L = 0.96 m is the length of the rod

Substituting,

$I_r = \frac{1}{12}(24)(0.96)^2=1.84 kg m^2$

The moment of inertia of one ball is given by

$I_b = mr^2$

where

m = 50 kg is the mass of the ball

$r=\frac{L}{2}=\frac{0.96}{2}=0.48 m$ is the distance of each ball from the axis of rotation

So we have

$I_b = (50)(0.48)^2=11.5 kg m^2$

Therefore, the total moment of inertia of the system is

$I=I_r + 2I_b = 1.84+ 2(11.5)=24.8 kg m^2$

Learn more about inertia:

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3 years ago

Colors seen on the cover of our physics book result from color Group of answer choices addition. subtraction. either of these ne

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Colors seen on the cover of our physics book result from color is due to Subtraction.

What is physics of color subtraction?

Some visible spectrum wavelengths are intentionally removed during the subtraction procedure.
For instance, the yellow filter transmits the green and red colors while blocking the blue.
Red and blue are transmitted while the green is blocked by the magenta filter.
Blue and green are transmitted while red is blocked by the cyan filter.
Subtractive mixing gets its name from the fact that when colors are mixed, wavelengths are removed from what we see because each paint absorbs some of the wavelengths that the other paint reflects, leaving us with less wavelengths afterward.

Learn more about Subtractive mixing with the help of the given link:

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1 year ago

When approaching an intersection, bridge, or railroad crossing, you should never drive (pass on the left half of the roadway whe

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You should not go into the left side of the roadway when within 100 feet of the crossing. Moreover, you should also turn on your turn signal when within 100 of a turn. These precautions prevent accidents as it makes clear to other drivers what your intentions are and drivers making turns are not endangered.

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3 years ago