A shark accelerates uniformly from 2.8 km/h to
32.0 km/h in 1.5 s. How large is its acceleration!

Answer:

b and f

Explanation:

Following are examples of projectile motion: a. A tennis ball lobbed over a net c. A plastic disk sailing across a lawn d. A hawk diving to catch a mouse e. A parachutist drifting to Earth. The correct options are A, C, D and E.

Projectile motion refers to the motion of an object that is launched into the air and moves along a curved trajectory under the influence of gravity alone, with no other forces acting horizontally. In projectile motion, the object follows a path called a parabola.

In the given options, a tennis ball being lobbed over a net, a plastic disk sailing across a lawn, a hawk diving to catch a mouse, and a parachutist drifting to Earth all demonstrate projectile motion. In each case, the objects are initially launched or propelled into the air and subsequently follow a curved path influenced primarily by gravity. The trajectory of these objects can be described by a parabolic shape, which is a characteristic of projectile motion.

The correct options are A, C, D and E.

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Explanation:

One of the interesting things about projectile motion is that the horizontal motion is independent of the vertical motion. Recall that in freefall, an object continually experiences a downward acceleration of 9.80ms2 but has no horizontal acceleration.

Answer:

O: girl- aww your so sweeet thanks for that!!!!! like fr ive

been feeling so sad):

Answer:

SUN

Explanation:

EARTH

Answer:

A cleaning product that contains a base.

Explanation:

Ren should use a cleaning product that contains a base. This is because bases readily react with lipids (fats), the kind of compound that makes up grease. A base would break down the grease, forming soap, which would then easily wash away.

Answer: C

Explanation: after reading it over and over shes the most reasonable. But I could be wrong so be cautious.

According to the question, Maria would be best classified as being in identity diffusion. So, option (C) is correct answer.

People who are experiencing identity diffusion haven't chosen an ideological or occupational route for the future and aren't making any effort to do so. Identity diffusion occurs during adolescence, a time when individuals are attempting to define their identities, but it can also last into adulthood.

In the question, Maria has adopted her parents’ identification as Protestant without considering other options. She   haven't chosen an ideological or occupational route for the future and aren't making any effort to do so.  So, Maria  would be best classified as being in identity diffusion.

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I think it would be, D. Warm air in a hot air balloon rises and heats air at the top of the  balloon.

The scenario that represents an example of the transfer of thermal energy by convection is the warm air in a hot air balloon rises and heats air at the top of the balloon. Thus, the correct option for this question is D.

Convection may be defined as a type of process through which heat is significantly transferred by the movement of a heated fluid such as air or water. It involves the transfer of heat by the movement of a fluid (liquid or gas) between areas of different temperatures.

Thermal energy refers to the energy which is contained within a system that is responsible for its temperature. Heat is the flow of thermal energy.

This thermal energy gets transferred through the process of convection from the top of the balloon in an example of a hot air balloon. The concept of this works on the warm air that is filled in a balloon and this warm air rises and heats air at the top of the balloon.

Therefore, the correct option for this question is D.

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The given condition satisfies the Newton's First Law of motion. Hence, option (C) is correct.

Given data:

A boy slides down and friction causes him to slow down and stop.

In the given problem, when boy was sliding down, then he was in the state of motion, such that the when the he reaches at the bottom of hill, the friction plays the role of external agent to stop its motion.

This shows that the first law of motion is clearly followed which says that, "If an object is in motion, then it will be in motion until and unless any external force is applied on it". This is also known as law of inertia.

Thus, we can conclude that the given condition satisfies the Newton's First Law of motion. Hence, option (C) is correct.

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Answer:

D. if it is dark, then an owl will find a mouse by the sound the mouse makes

Answer:

mechanical energy is in a windmill

Answer:

A: speed and direction

Answer:

v?

Explanation:

v = ∆s / ∆t

v =?

∆s = 236 - 218 = 18km

=t = 10: 30 - 10:15 = 15 minutes to hour 15/60 = 0.25h

v = 18 / 0.25

v = 72km / h

speed of 72km / h

Answer:

From a sound standpoint, higher tracking force reduces all other things being equal which might reduce the top end a bit and increase bass.

Answer:

False

Explanation:

Answer:

C

i just took the test!

Answer:

Solids have definite shapes, and liquids fill their containers.

Explanation:

The ACTUAL answer

Answer:

1. A) Reducing the thickness of the conductor would result in increased resistance to the flow of electric current

2. D) Induced magnetism produces magnetism by placing a body within a magnetic field.

3.  C)  For an electric current to be produced, an electric potential between two bodies and a conducting path joining the bodies.

4. YOU REPEATED QUESTION 1&4.

5. C) 1/R= 1/r1 + 1/r2 + 1/r3

6. A) Silicon, commonly used in electronic devices, is classified as a semiconductor

7. B) Electrons from your hair jump to the balloon, causing it to become negatively charged on one side.

Explanation:

7. The balloon “steals” electrons from your hair, which causes one side of the balloon to become negatively charged. Since your hair lost electrons, it now has a partial positive charge. Opposite charges of static electric attract, causing them to stick together.

6. For a material to be considered a semiconductor, it must have a resistance to electric current that's too high to be considered a conductor but too low to be considered an insulator. Three common semiconductors used in electronic devices are silicon, germanium, and selenium.

5. If three components are arranged to form a parallel circuit, and the individual resistance of these components are r1, r2, and r3 respectively, the formula for finding the total resistance R is: 1/R= 1/r1 + 1/r2 + 1/r3.

4. YOU REPEATED QUESTIONS 1 & 4.

3. For an electric current to be produced, there must be an electric potential between two bodies and a conducting path joining the bodies. Two oppositely charged bodies won't produce a current unless there's a conduction path for the electrons to travel through.

2. Placing a piece of metal such as an iron bar into a magnetic field, thereby causing the bar to become magnetized, is known as induced magnetism. Typically, an object that has been magnetized in this manner will lose its magnetic properties quickly when removed from the magnetic field.

1.  The resistance to electric current increases as the cross-section of the conductor is reduced, as the conductor is lengthened, and as the conductor is heated. Replacing the conductor with a less-conductive material increases the resistance as well.

1 & 4. A) Reducing the thickness of the conductor would result in increased resistance to the flow of electric current.

2. D) Induced magnetism produces magnetism by placing a body within a magnetic field.

3. C)  The two things must exist for an electric current to be produced is an electric potential between two bodies and a conducting path joining the bodies.

5. C) The formula used to determine the total resistance of the circuit is 1/R= 1/r1 + 1/r2 + 1/r3

6. A) Silicon, commonly used in electronic devices, is classified as a semiconductor

7. B) Electrons from your hair jump to the balloon, causing it to become negatively charged on one side.

The stream of positive charges which flow from the positive terminal to the negative terminal of the battery attached in a circuit.

1 & 4. An electric potential between two bodies and a conducting path joining the bodies is required to produce current.  If all other things remain equal, changes to a closed circuit that would result in increased resistance to the flow of electric current is reducing the thickness of the conductor.

The correct option is A.

2. If an iron bar placed into a magnetic field, it become magnetized, also known as induced magnetism. The term refers to producing magnetism by placing a body within a magnetic field is induced magnetism.

The correct option is D.

3. The two things must exist for an electric current to be produced is an electric potential between two bodies and a conducting path joining the bodies.

The correct option is C.

5. If three components are arranged to form a parallel circuit, and the individual resistance of these components are r1, r2, and r3 respectively, the formula for finding the equivalent resistance R is: 1/R= 1/r1 + 1/r2 + 1/r3.

The correct option is C.

6. A semiconductor must have a resistance to electric current . Three common semiconductors used in electronic devices are silicon, germanium, and selenium.

The correct option is A.

7. The balloon transfers electrons from your hair, which causes one side to become negatively charged. Hair lost electrons, it has a partial positive charge. Opposite charges of static electric attract, causing it to stick together. So, hair stands on end when you rub it with a balloon because electrons from your hair jump to the balloon, causing it to become negatively charged on one side.

The correct option is B.

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Answer:

Answer is a force liquid that cannot be compresed

on edgenuity

Explanation:

Answer:

The observable universe is still huge, but it has limits. because it's most likely like an plane all round.

Explanation:

Answer:

Yes

Explanation:

the universe is constanlty expanding at a rate of 74.3 plus or minus 2.1 kilometers (46.2 plus or minus 1.3 miles) per second per megaparsec (a megaparsec being about 3 million light-years).

Answer B. the direction of force is the same

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

[tex]acceleration = \frac{force}{mass} \\[/tex]

From the question

force = 172 N

mass = 51 kg

We have

[tex]acceleration = \frac{172}{51} \\ = 3.372549019...[/tex]

We have the final answer as

Hope this helps you

Answer: Explanation:

Blastocyst, a distinctive stage of a mammalian embryo. It is a form of blastula that develops from a berrylike cluster of cells, the morula. A cavity appears in the morula between the cells of the inner cell mass and the enveloping layer.

Answer:

Tiny particles in solids, liquids and gases are always in motion. It is the motion of particles that creates a form of energy called thermal (heat) energy that is present in all matter. The particles in solids are tightly packed and can only vibrate. Matter in its solid state has the lowest amount of thermal energy (for that type of matter). Because solids have less thermal energy than liquids or gasses, the atoms in their solid state move very little.

Explanation:

So yes, chocolate has VERY low thermal energy

Answer:

The true statement is;

(b) The rock takes about the same time to hit the water in each case

Explanation:

The given information are;

The direction in which the rock is kicked = Horizontally

The number of different initial horizontal with which the rock as kicked =  different horizontal velocity

The time taken for the rock to hit the water is given by the following equation for projectile motion;

y = y₀ + v₀× sin(θ₀)×t - 1/2×g×t²

Where;

θ = The angle the rock makes with the horizontal when it was kicked = 0

y = The height through which the rock drops

y₀ = The initial height of the rock

t = The time taken for the ball to hit the water

g = The acceleration due to gravity ≈ 9.81 m/s²

For the different speeds, v₁, v₂, and v₃, we have;

y = y₀ + v₁× sin(0)×t - 1/2×g×t² = y₀ - 1/2×g×t²

y = y₀ + v₂× sin(0)×t - 1/2×g×t² = y₀ - 1/2×g×t²

y = y₀ + v₃× sin(0)×t - 1/2×g×t² = y₀ - 1/2×g×t²

Therefore, the time it takes for the ball to hit the water is given as follows;

[tex]t = \sqrt{\dfrac{(y_0 - y) \times 2}{g} }[/tex]

Which is the same for each case

However, the speed, v, with which the rock hits the water is given by the following equation;

[tex]v = \sqrt{v_x^2 + v_y^2}[/tex]

[tex]v_y[/tex] = The vertical velocity = v₀ × sin(θ₀) - g×t = v₀ × sin(0) - g×t = -g×t

[tex]v_y[/tex] = -g×t

Therefore, [tex]v_y[/tex], is the same for all three times

While vₓ = v₁, v₂, and v₃, for each of the three times.

Therefore, [tex]v = \sqrt{v_x^2 + v_y^2}[/tex]  the speed with which the rock hits the water is different for all three times.

Answer: A: electron shells outside a central nucleus

B: hard, indivisible sphere

C: mostly empty space

Which list of atomic model descriptions represents

the order of historical development from the earliest

to most recent?

Explanation:

3

Atomic models have been proposed throughout history describing the possible arrangements of different particles inside the atoms.

Thus, the correct order of atom model is B C A. Hence, the correct answer is option C.

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Answer:

[tex]the \: net \: force = \: 50 - 15 = 35.[/tex]

Answer:

Net force is going to be GREATER FORCE - LESS FORCE if they are working in opposite direction

so,

         50N - 15N = 35N

Answer:

waves

Explanation:

ocean

Answer:

1200 watts

-hope this helps

Answer:

0.4 Kilograms of flour

Explanation:

If you convert 400 grams into kilograms (400 ÷ 1,000), you would get 0.4 kilograms.