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4 years ago

Describe three clues that tell you that you are o serving a chemical change. Give an Example of each clues you described.

Physics

1 answer:

sergiy2304 [10]4 years ago

3 0

1) the object would change color (start to rust or just chnage color)

2) The new substance is ireversable (cant chnage back to original form)

3)theres gas formations (its can change into a gas property)

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If you carry out an experiment measuring the weight and mass of objects in one particular location on the earth, what relation w

Elina [12.6K]

The answer is letter C.

Weight (on Earth) is the force due to the mass of Earth attracting whatever mass is subject of discussion.

The force of attraction between any two masses is called Newton's Law of Universal Gravitation:

$G \frac{m_1m_2}{d^2}$

$G$ is simply a given constant.

If we're at the surface of Eath, $m_1$ refers to the mass of the Earth, $m_2$ to the mass of whatever is on the surface of Earth, and $d$ to the radius of Earth.

Normally, we define a constant $g$ to be equal to $G \frac{M}{r^2}$ ; in which $M$ is the mass of Earth and $r$ the radius of earth; $g$ happens to be around 9.8.

By that, we adapt the Law of Universal Gravitation to objects on the surface of Earth, we call that force Weight.

$W=mg$

As you can see, weight is directly proportional to mass, more mass implies more weight.

8 0

4 years ago

Research indicates many adults experience emotional turmoil during their 40s. T or F

kondaur [170]

In a person's forties, they are in the middle of stagnation vs. identity, so they are having an identity crisis.

7 0

4 years ago

Read 2 more answers

Does the charge that flows into the capacitor during the charging go all the way through the capacitor and back to the battery,

snow_lady [41]

The capacitor is used to store electric charge.That is what makes capacitors special. 
The charge that flows into the capacitor is stored on the plate of the capacitor that the source voltage is connected to. When current flows into a capacitor, the charges get “stuck” on the plates because they can’t get past the insulating dielectric. One plate is positively charged and the other negatively The stationary charges on these plates create an electric field. When charges group together on a capacitor like this, the cap is storing electric energy just as a battery might store chemical energy.

8 0

4 years ago

In the unsaturated zone, the pores of the soil are totally filled with water. T or F

creativ13 [48]

the answer is clearly false

6 0

3 years ago

For a projectile with no air resistance, at the peak of its path, _______________.

3241004551 [841]

Answer: "For a projectile with no air resistance, at the peak of its path, it's velocity is equal to zero"

Explanation:

Suppose that you throw an object up. The initial vertical velocity will be positive, and the acceleration (the gravitational acceleration) will point downwards, meaning that it opposes to the initial direction of the velocity, and that decreases the velocity as the time goes by.

There will be a point where the velocity ( that was positive until now, so until now the height of the object was increasing), is equal to zero, this means that at this moment the object stops moving, and after, because we still have negative acceleration, the velocity will start become negative, and the object will fall down.

Then that point where the velocity was zero is the peak of its path, then we can conclude that:

"For a projectile with no air resistance, at the peak of its path, it's velocity is equal to zero"

4 0

3 years ago