BRAINLIST IF ITS CORRECT PLEASE HELP ME!!
You will need a magnifying glass and a small piece of scrap paper for this demonstration.
a. Go outside on a sunny day and put the piece of paper on a patch of asphalt, concrete, or a large flat rock. Make sure there is no other combustible material or debris in the vicinity.
b. Hold the magnifying glass so it is close to the paper, with rays of sunlight shining through it. Move the magnifying glass side to side and close or away from the paper until the most concentrated ray of light is shining on the paper. This is the focal point for that magnifying glass.
c. Measure the distance between the focal point and magnifying glass. This is the focal length for that magnifying glass. (Be careful; if you hold the magnifying glass in that place for long enough, the paper will catch fire. Do not ever do this on your skin or clothing, as it can cause serious burns.)d. Now take the magnifying glass inside and use it to look at the words in a book. What is the focal length now?

Answer:

4m

Explanation:

you divide 20m/s by 5 seconds

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when it is at rest.

because,

kinetic energy occurs when object in motion.

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An object has no kinetic energy when it is at rest (Option A).

Kinetic energy is the measure of the work that an object does by virtue of its motion. Simple activities like walking, jumping, throwing, and falling involve kinetic energy. In this article, let us familiarize ourselves with the concept of kinetic energy.

Kinetic energy is the energy an object possesses due to its motion. The formula for kinetic energy is

KE = 1/2mv²,

Where m is the mass of the object and

v is its velocity.

When an object is at rest, it has zero velocity, which means that its kinetic energy is also zero.

Option B is not correct because even if an object is moving very slowly, it still has some kinetic energy. The amount of kinetic energy it has will depend on its mass and velocity.

Option C is not correct because the force acting on an object does not affect its kinetic energy directly.

Kinetic energy is related to an object's motion, not its forces.

Option D is not correct because an object's electrical charge does not affect its kinetic energy directly. The amount of kinetic energy an object has is determined solely by its motion.

Learn more about kinetic energy here:

https://brainly.com/question/15764612

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So, the final velocity of the ball when it is 2.101 above the ground is 13.99 m/s or can be rounded to 14 m/s.

Hi ! In this question, I will help you. This question will addopt the principle of final velocity in free fall. Free fall is vertical downward movement that occurs when any object dropped without initial velocity. In othee word, the object that falls is only affected by the presence of gravity and its initial high. In general, the final velocity in free fall can be expressed by this equation :

[tex] \boxed{\sf{\bold{v = \sqrt{2 \times g \times h}}}} [/tex]

With the following condition :

We know that :

Note :

At this point (2.101 m above the ground), the object can still complete its movement up to exactly 0 m above the ground.

What was asked :

Step by Step

[tex] \sf{v = \sqrt{2 \times g \times \Delta h}} [/tex]

[tex] \sf{v = \sqrt{2 \times g \times (h_1 - h_2)}} [/tex]

[tex] \sf{v = \sqrt{2 \times 9.8 \times (12.09 - 2.101)}} [/tex]

[tex] \sf{v = \sqrt{19.6 \times 9,989}} [/tex]

[tex] \sf{v \approx \sqrt{195.78}} [/tex]

[tex] \boxed{\sf{v = 13.99 \: m/s \approx 14 \: m/s}} [/tex]

So, the final velocity of the ball when it is 2.101 above the ground is 13.99 m/s or can be rounded to 14 m/s.

Answer:

to the left

Explanation:

The gravitational force exerted between two objects is given by

were

G is the gravitational constant

m1, m2 are the masses of the two objects

r is their separation

And the force is always attractive.

Let's call

the mass on which we are calculating the net force.

The mass on the left is

and it is a distance of

r = 0.500 m

So, the gravitational force exerted by this mass on the 10.0 kg mass is

And the direction is to the left.

The other mass is

and its distance is

r = 1.25 m

to the right, so the force exerted by this other mass on the 10.0 kg mass is

And the direction is to the right.

Now, to find the net force, we just have to calculate the algebraic sum, taking into account that the two forces have different directions; taking right as a positive direction, the net force is:

And the negative sign means the direction of the net force is to the left.

Answer:

1/2 m v2^2 = 1/2 m v1^2 - G M m / R      conservation of energy

v1^2 - v2^2 = 2 G M / R      rearranging terms

2 G M / R = 2 * 6.67 * 5.98 / 6.37 E7 = 1.25E8

v1^2 - v2^2 = 1.25E8

v2^2 = v1^2 - 1.25E8 = (1.5^2 - 1.25) * E8

v2 = 1.00E4 = 10,000 m/s

Answer:

They are different sizes.

Explanation:

Because electrons are what take up space in atoms, the result is that the size of the biggest filled orbital determines the size of the atom or ion. As you go down the periodic table, usually atoms get bigger because n gets bigger (there are electrons in higher shells).

Increasing the current in the filament.

Decreasing the potential difference between the cathode and anode.

Decreasing the current in the filament.

Increasing the potential difference between the cathode and the anode.