Which statements about the kinetic energy of a moving object are true?​

Answer:

Iodine is most similar  to the other non- metals in the Halogen Family, such as Fluorine, Chlorine, Bromine, Astatine .

Explanation:

Answer:

1. Initial vertical velocity its 0m/s

2. 2.47 seconds

3. 10.12 m/s

4.10.12 m/s

Explanation:

Remember that we have here two parts of a problem, first we know that the ball made a free fall of 30 meters, since the ball was hit horizontally and doesn't state otherwise the vertical velocity is 0. To calculate the time we just use 30 m as our Height and use the formula for vertical distance on free fall:

[tex]H=\frac{g*t^{2} }{2} \\[/tex]

Now we just solve for time:

[tex]t=\sqrt{\frac{2H}{g} }[/tex]

With this we just insert the values we know:

[tex]t=\sqrt{\frac{2H}{g} }\\t=\sqrt{\frac{2*30}{9.81} }\\t=2.47[/tex]

Now we know that the ball was 2.47 seconds in the air, so the ball hti the ground at the second 2.47.

To calculate the velocity of the ball we just need to divide the horizontal distance covered by the time it spent on air:

[tex]v=\frac{d}{t} \\v=\frac{25}{2.47} \\v=10.12[/tex]

The final and initial horizontal velocity of the ball would be the same since nothing states otherwise, of course the hitting of the ground would decrease its velocity but since nothing is said in the problem it is not considered.

1. The initial-vertical velocity of the golf ball is equal to zero because the ball would start its motion from a stationary position (at rest).

2. The time it took the golf ball to hit the ground is 2.47 seconds.

3. The initial-horizontal velocity of the golf ball is 10.12 m/s.

4. The final-horizontal velocity of the golf ball is 10.12 m/s.

Given the following data:

1. The initial-vertical velocity of the golf ball is equal to zero because the ball would start its motion from a stationary position (at rest).

2. To determine the time it took the golf ball to hit the ground:

At maximum height, time is given by the formula:

[tex]Time = \sqrt{\frac{2H}{g} }[/tex]

Where:

Substituting the given parameters into the formula, we have;

[tex]Time = \sqrt{\frac{2\times 30}{9.8} }\\\\Time = \sqrt{\frac{60}{9.8} }\\\\Time =\sqrt{6.12}[/tex]

Time = 2.47 seconds.

3. To determine the initial-horizontal velocity of the golf ball:

[tex]Horizontal\;velocity = \frac{Horizontal\;distance}{Time} \\\\Horizontal\;velocity = \frac{25}{2.47}[/tex]

Initial horizontal velocity = 10.12 m/s.

4. To determine the final-horizontal velocity of the golf ball:

The initial-horizontal velocity and final-horizontal velocity of the golf ball would be the same.

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Answer:

transmission:  the act or process by which something is spread or passed from one person or thing to another

reflection: when light from an object is reflected by a surface, it changes direction. It bounces off the surface at the same angle as it hits it. Smooth, shiny surfaces such as mirrors and polished metals reflect light well.

refraction: change in direction of a wave passing from one medium to another or from a gradual change in the medium

diffraction: various phenomena that occur when a wave encounters an obstacle or opening

Answer:

It is toward the center

Explanation:

Answer:

True

Explanation:

Assuming no wind resistance, there will be no horizontal acceleration, because there will be no forces acting on it.

Answer:

its Force 1  is a contact force and Force 2 is a non-contact force.

Explanation:

I took the test!

Answer:

Force 1 is a contact force, Force 2 is a non-contact force :)

Explanation:

Because Force 1 is an object touching something and Force 2 is a force that is not touching something (hope this helps)

Answer:a

Explanation:

The formation of salt takes place by the sharing of positive ions from a base and negative ions from an acid. Hence, option (a) is correct.

The given problem is based on the concept and fundamentals of Neutralization. The process of neutralization is the name given to the chemical reaction between that takes place between the acid and base.

Thus, we can conclude that the formation of salt takes place by the sharing of positive ions from a base and negative ions from an acid. Hence, option (a) is correct.

Learn more about the Neutralization reaction here:

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Answer:

122.5m.

Explanation:

I think it's right..

The velocity of the nitrogen molecule immediately after the collision (in km/s) is -0.5064 km/s.

When there is no external force acting on the system, the initial momentum before collision is equal to the final momentum after collision.

According to the momentum conservation principle,

m₁u₁ +m₂u₂ =m₁v₁ +m₂v₂

here, u represents the initial velocities, v represents final velocities and m represents the masses.

Given is the mass of nitrogen molecule, m₁ =28u =28 x 1.66×10⁻²⁷kg = 46.48 x 10⁻²⁷kg

the mass of water molecule, m₂ =18u =18 x 1.66×10⁻²⁷kg = 29.88 x 10⁻²⁷kg

initial velocity of nitrogen molecule u₁ = 0.4390 km/s

initial velocity of water molecule u₂ = -0.7690 km/s

final velocity of water molecule v₂ = 0.7016 km/s

Substituting the values into the above expression, we get the final velocity of the nitrogen molecule

46.48 x 10⁻²⁷kg x 0.4390 km/s + 29.88 x 10⁻²⁷kg x (-0.7690 km/s) = 46.48 x 10⁻²⁷kg x v₁ +  29.88 x 10⁻²⁷kg x  0.7016 km/s

v₁ = -0.5064 km/s

Thus, the final velocity of nitrogen molecule is -0.5064 km/s (to left).

Learn more about conservation of linear momentum.

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#SPJ2

Explanation:

25.61 cm * 1 Gm

100000000000 cm = 2.561e-10 Gm

1 Gm = 10^9 m =10^11 cm

then 10^11 cm = 1Gm

25.61 cm = 25.61 /10^11

=25.61 * 10^-11 Gm

Answer:

resistance = (resistivity.(l/A))

so for the 2 materials we get

r1 = resistivity.(l/r)

r2=resistivity.(2l/(r/2))

so ratio r1/r2=1/4

Explanation:

The resistance is proportional to the length and inversely proportional to the area (which is proportional to the square of the radius). Thus if we are just comparing the two (so the constants will cancel out).

r1 = l/r^2 (r squared).

r2 = (2l)/(1/2r)^2

r2 = 2l/(1/4)r^2

dividing by 1/4 is the same as multiplying to 4, so you are multiplying by 2 and then by 4, thus by 8.

Thus R2 is 8 times more than R1.

Answer:

i like trains 45654

Explanation:

Answer:

i believe it is c

Explanation:

hope this helps and plz mark brainliest

Answer:

Example:

A car applying brake.

A player catching a bowl.

Answer:

the beakers measure in milliliters (ml)

the skinny one measures 1 ml per tick mark

the wider one measures 25 ml per tick mark

Answer:

it acceleration 7.2m/s²

Explanation:

mass of object = 50kg

force of object = 360N

acceleration = ?

Force= mass × acceleration

acceleration = force/mass

acceleration = 360N/50Kg

acceleration = 7.2m/s²

it accelerate 7.2 m/s²

Answer:

It will be cut in half

Explanation:

The diffraction of a slit is given by the formula

a sin θ = m where

a = width of the slit,

λ = wavelength and

m = integer that determines the order of diffraction.

Next we divide both sides by a, we have

sin θ = m λ / a

Also, recall that

a’ = 2 a

Then we substitute in the previous equation

2asin θ' = m λ, if divide by 2a, we have

sin θ' = (m λ / 2a).

Now again, from the first equation, we said that sin θ = m λ / a, so we substitute

sin θ ’= sin θ / 2

Then we use trigonometry to find the width, we say

tan θ = y / L

Since the angle is small, we then have

tan θ = sin θ / cos θ

tan θ = sin θ, this then means that

sin θ = y / L

we will then substitute

y’ / L = y/L 1/2

y' = y / 2

this means that when the slit width is doubled the pattern width will then be halved

Answer:

a

Explanation:

Answer:

A

Explanation:

Answer:

Sound Waves

Light Waves

Explanation:

Answer: The answer is 40.

Explanation: There is a typo, they mean 5 minutes. Five minutes is the line between zero and 10, and the dot matches up at 5 and 200. 200 divided by 5= 40.

Answer:

R∠          is  152,3 ∠ 246,8

Explanation:

We need to add (vectorially)  these two velocities. We can choose the coordinates system just that speed of the airplane is the negative part of the y-axis, and negative region of the x-axis, for wind speed, according to

this, the module of the resultant velocity R is:

R =√ (60)² + (140)²

R = √( 3600) + ( 19600)

R =√ 23200

R = 152,315 mph

The tangent of the angle (α )  between R and the y-axis is:

tan α = 60/140

tan α = 0,4286

From tangent tables, we get arctan 0.4286  

α = 23,2⁰

Then R∠    is  152,3 ∠ 246,8

Answer:

R∠          is  152,3 ∠ 246,8

Answer:

Giardia lamblia, a microorganism, invades the cells of the small intestine in humans,

absorbs nutrients, and causes diarrhea in its host is an example of parasitism

Explanation:

Ants protect aphids from their predators, ladybugs, in return for honeydew.is an example of mutualism

Two species of grass in an ecosystem require water and the same nutrients is an example of competition

A barnacle attaches to a whale for transport, but does not affect the whale is an example of commensalism.

Interactions or relationships between organisms can occur where one or both organisms derive benefits from each other.

Ecological relationships are relationships between two or more organisms on how they obtain their food as well as other requirements for survival.

Some feeding relationships include:

Examples of the relationships above are:

Therefore, relationships between organisms can occur where one or both organisms derive benefits from each other.

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#SPJ 2

The observation of his parents swinging and practicing what he saw mainly involved sensory neurons.

There are five senses in the human body, they are;

Information is passed to the central nervous system (CNS) from each of these senses.

The neurons that convey sensory information of sight, smell, touch, taste and hearing to the brain are called sensory neurons.

Thus, the observation of his parents swinging and practicing what he saw mainly involved  sensory neurons.

Learn more: https://brainly.com/question/9911075

Answer:

the reaction force on the box

Explanation:

In order to push or pull an object, an external force is needed to overcome the weight of that object. This force is called ACTION FORCE. However, according to 3rd law of Newton, which states that for every action, there is an equal and opposite reaction, an opposite force counters the object in an opposite direction. This force is called REACTION FORCE.

According to this question, Lien is pushing a box across a table. She used a force of 100 N to get the box moving. This means that she had to overcome an opposite force called REACTION FORCE, with an ACTION FORCE of 100N

Answer:

C. the reaction force on the box

Explanation:

i literally just finished the quiz

Answer:

Newtons third law states, "The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object."

Explanation:

an illustration of this would probably be a missile.

Answer: C. “More mass is added to a wheelbarrow remains, and larger forces required to move it”

Answer:

TRUE

Explanation:

Answer:

True

Explanation: