A woman throws her keys straight
up at 8.49 m/s. Her friend catches
them 2.89 m higher. How long were
the keys in the air?​

Answer:

D) Weed whacker full of grass

Explanation: Its D) because the weed wacker full of grass is stil and not moving therefore making it potential energy.

Answer:

5*10^25 atoms of carbon

Explanation:

Check from the periodic table:

M(carbon) = 12.01 g/mol

Convert kg into g:

1 kg = 1000 g

Calculate the number of moles of carbon:

n(carbon) = (1000 g) ÷ (12.01 g/mol) = 83.26 mol

Convert moles into number of particles:

#(carbon) = n × NA = 83.26 mol × 6*10^23

= 5*10^25 particles

Note: NA represents the Avogadro's Number, which has the value 6.02*10^23 particles/mol.

Answer:

0.018kg

Explanation:

Q=mlf

m=?,Lf=334000J/kg,Q=5848J

5848=mx334000

5848=334000m

divide both sides by 334000

334000m/334000=5848/334000

m=0.018kg

Answer:

B. Bend away from each other

Explanation:

Answer: optical telescope.

For this case we have that by definition, the frequency is given by the number of cycles that are formed in a second.

According to the statement we have:

Cycles: 30

Time: 1 minute = 60 seconds

Thus, the frequency is:

[tex]f = \frac {30} {60} = \frac {3} {6} = \frac {1} {2} = 0.5[/tex]

Thus, the frequency of the pendulum is[tex]0.5 \ Hz[/tex]

Answer:

[tex]0.5 \ Hz[/tex]

Answer:

Gold

mica

halite

gypsum

copper

Explanation:

Gold:it is used in dentistry

mica: its is used in putting sparkle in rock

halite:its used in seasoning food and softening water

gypsum: it is used as fertilizer and road construction

copper: it is used for jewelry and currency

Answer: your welcome

Explanation:

Answer:

a: river

B: tributary

Explanation:

Answer:

it goes down

Explanation:

Answer:

The kinetic energy of the particles are being reduced.

Answer:

1000 N

Explanation:

The Electric Force between two charged particles with charges q1 and q2 respectively, separated by a distance, d, is given as:

F = (k * q1 * q2) / d²

Where k = Coulombs constant

From the question:

Charge of first particle = charge of second particle = q = +1 C

Distance between both particles, d = 3000 m

Therefore, Electric Force is:

F = (9 * 10^9 * 1 * 1) / (3000²)

F = (9 * 10^9) / (9 * 10^6)

F = 1 * 10^3 N = 1000 N

The electric force between both charges is 1000 N.

Answer:

1000 N

Explanation:

The electric force between two charges is given as

F = kq'q/r²......................... Equation 1

Where F = electric force between the charges, q' = magnitude of the first charge, q = magnitude of the second charge, r = distance between the charges, k = coulombs constant

Given: q' = q = 1 C, r = 3000 m, k = 9×10⁹ Nm²/kg²

Substitute into equation 2

F = 1²×(9×10⁹)/3000²

F = 1000 N.

Hence the magnitude of the electric force between them = 1000 N

Answer:

True!

Explanation:

Apples, potatoes and onions will all taste the same if somehow you were to block your sense of smell (plug your nose).

The wavelength of the first order bright band light light is 714 nm .

Explanation:

We have to find the wavelength of the first order brightness of a light. Here we are using Huygen's principle of light.

The formula is

nλ =d sinθ

where, n is the order of maximum

            λ is the wavelength of light

            d is the distance between the lines on diffraction grating.

            θ is the angle.

For the given equation n is 1 because the problem states that the light forms 1st order bright band

  λ  is unknown.

d = [tex]\frac{1}{700,000}[/tex] or 0.0000014 m

sin (30) = 0.5

so,

1(λ) = (0.0000014)(0.5)

     = 0.0000000714

     = 714 nm

Thus, The wavelength of the first order bright band light light is 714 nm .

Answer:

Your answer is SOMATIC :)

The somatic nervous system is the part of the peripheral nervous system associated with the voluntary control of body movements and skeletal muscles.

The voluntary skeletal muscles that should be controlled represent the function of the somatic nervous system.

The somatic nervous system refers to the system where it is the portion of the nervous system i.e. peripheral and should be associated with the controlling of the movement of the bonds through the skeletal muscles usage. Therefore, we can say that the option b is correct.

And, the rest of the options are wrong.

Learn more about muscles here: https://brainly.com/question/2687783

Answer:

A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium. While waves can move over long distances, the movement of the medium of transmission—the material—is limited. Therefore, the oscillating material does not move far from its initial equilibrium position.

Explanation:

All of the following are common symptoms of all dissociative disorders except wandering away from home.

Dissociative disorder, or dissociative identity disorder, is a psychological disorder in which a person has changes in consciousness, memory, identity, emotion, perception of the environment, control of movements and behavior, which can happen after traumatic or high-stress events.

Overview of dissociative disorders.

See more about dissociative disorders at brainly.com/question/4566966

Sample C has the lowest kinetic energy value and, assuming the same conditions for all samples, it would also have the lowest temperature. Therefore, option C is correct

The image contains a list of samples with their corresponding average kinetic energies of molecules in joules. To determine which sample has the lowest temperature, we would need to apply the principle that, at a given temperature, the average kinetic energy of molecules is proportional to the temperature itself. This is described by the equation:

[tex]\[ KE_{avg} = \frac{3}{2} k T \][/tex]

where [tex]\( KE_{avg} \)[/tex] is the average kinetic energy, [tex]\( k \)[/tex] is the Boltzmann constant [tex](\(1.38 \times 10^{-23} \text{ J/K} \))[/tex], and [tex]\( T \)[/tex] is the temperature in kelvins.

However, without additional information about the specific gases or the number of molecules involved, we cannot calculate the exact temperature from the average kinetic energy. Typically, the kinetic energy of a sample is directly proportional to its temperature (in an ideal gas scenario). Therefore, the sample with the lowest average kinetic energy would also have the lowest temperature.

Based on the average kinetic energy values provided in the image, we can conclude that:

- Sample A has [tex]\( 1.50 \times 10^4 \)[/tex] J

- Sample B has [tex]\( 1.73 \times 10^5 \)[/tex] J

- Sample C has [tex]\( 2.73 \times 10^3 \)[/tex] J

- Sample D has [tex]\( 5.06 \times 10^4 \)[/tex] J

Sample C has the lowest kinetic energy value and, assuming the same conditions for all samples, it would also have the lowest temperature.

Answer: D

Explanation:

Answer:

the answer is b

Explanation:

when there going against each other it would have to break, I hope this helps.

Answer:

The left to right motion causes a pulse in the coils and it doesn't look like the wave is moving but it is a longitudinal wave. Moving it side to side causes a "snake like" motion of the slinky, which is a transverse wave

Explanation:

Answer:

Check below for the answers and explanations.

Explanation:

Note: You did not provide the diagram you mentioned but I will explain to you the sequence of events that take place as a fluid cools. I believe you can apply this to the particular diagram that you have.

Sequence of events that take place as a fluid cools down:

The sequence of events that occur when a fluid cools down are;

The temperature of the liquid will drop

We have to note that according to the kinetic theory of matter, the molecules of a liquid are in constant random motion. The kinetic energy of these molecules depend on the temperature of the liquid.

The five sequence of event that happens as liquid molecules cool down are;

Learn more about liquid molecules: https://brainly.com/question/25667812

Answer:

The answer is A

Explanation:

The school bus has the most mass so it would need the most energy and force to set it into motion

hope this helps ;)

A. a school bus is the object that would require the most amount of energy, or force, to set it into motion.

Hence, A. school bus is the correct option.

Learn more about force:

https://brainly.com/question/13191643

the answer is 3.75 kgm/s

Momentum= mass x distance

1.31 x 2.86= 0.375kgm/s

Answer:

The slope of the graph is what you need. That tells you the speed not the velocity. In order to find the velocity you would also need to know the direction of the motion.

Answer:

Slope

Explanation:

Rise over Run

The option which is not practical application of gravity is The moon has no gravity because it has no atmosphere. The correct option is option B.

Practical Application of gravity is the use of gravity in ways that beneficial to man and earth. Gravity is one of the most important physical features of the earth and major contribution to our existence.

Examples of practical application of gravity

Learn more about importance of gravity here

https://brainly.in/question/5046226

#SPJ1

Answer:

Light includes ALL of these answers: Radio/Microwaves. Visible light and X-rays/Gamma rays.

Answer: Positive acceleration means increase in velocity with time. Negative acceleration means the speed reduces with the time.

Answer:

I think its transverse

Explanation:

The magnitude would be 10-9m

Based on scientific information and records, the magnitude of a nanometer is equal to: C. 10⁻⁹ m.

Measurement refers to a process through which the size, magnitude or other physical quantities associated with an object is taken, especially for the purpose of a scientific research (experiment).

In the metric system, a nanometer can be defined as a measure of length such as:

In conclusion, a nanometer is one billionth (10⁻⁹ m) of a meter.

Read more on a nanometer here: https://brainly.com/question/5753030

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Answer: Refracrion

Explanation: it is the bending of light

Answer:

Explanation:

Weight of the ladder is 355N

WL = 355N

The weight of the ladder acts at center of the ladder I.e at 4m from the bottom

Weight of firefighters is 870N

Wf = 870N

The fire fighter is at 6.3m from the bottom of the ladder.

N1 is the normal force exerted  by the wall

N2 is the normal force exerted  by the ground

Using Newton law

Check attachment

ΣFy = 0, since body is in equilibrium

N₂ - WL - Wf = 0

N₂ = WL + Wf

N₂ = 870 + 355

N₂ = 1225 N

This the normal force exerted by the ground on the wall.

Now to get N₁, let take moment about point A

So, before we take the moment we need to make sure that the forces are perpendicular to the plane(ladder), we need to resolve the weight of the ladder, firefighter and the normal of the wall to be perpendicular to the plane.

ΣMa = 0

Clockwise moment is equal to anti-clockwise moment

Moment Is the produce of force and perpendicular distance.

M = F×r

So,

WL•Cos50 × 4 + Wf•Cos50 × 6.3 —N₁•Sin50 × 8 = 0

355•Cos50 × 4 + 870•Cos50 × 6.3 =

N₁•Sin50 × 8

1825.52 + 3523.12 = 6.13N₁

6.13N₁ = 5348.64

N₁ = 5348.64/6.13

N₁ = 872.54 N.

The normal force exerted by the wall is 872.54N