Please help with number 24

It will take the quarter 0.151 seconds to reach the ground.

Given the following data:

We know that acceleration due to gravity (a) for an object is equal to 9.8 meter per seconds square.

To find how much time it will take the quarter to reach the ground, we  would use the second equation of motion.

Mathematically, the second equation of motion is given by the formula;

[tex]S = ut + \frac{1}{2} at^2[/tex]

Where:

Substituting the values into the formula, we have;

[tex]1.45 = 10.32(t) + \frac{1}{2} (9.8)t^2\\\\1.45 = 10.32t + 4.9t^2\\\\4.9t^2 + 10.32t - 1.45 = 0[/tex]

The standard form of a quadratic equation is:

[tex]ax^2 + bx + c = 0[/tex]

a = 4.9, b = 10.32 and c = 1.45

We would solve the above quadratic equation by using the quadratic equation formula;

[tex]x = \frac{-b\; \pm \;\sqrt{b^2 - 4ac}}{2a}[/tex]

Substituting the values, we have;

[tex]t = \frac{-10.32\; \pm \;\sqrt{10.32^2\; - \;4(4.9)(1.45)}}{2(4.9)}\\\\t = \frac{-10.32\; \pm \;\sqrt{106.5024\; - \;28.42}}{9.8}\\\\t = \frac{-10.32\; \pm \;\sqrt{78.0824}}{9.8}\\\\t = \frac{-10.32\; \pm \;8.84}{9.8}\\\\t = \frac{-10.32\; + \;8.84}{9.8}\\\\t = \frac{1.48}{9.8}[/tex]

Time, t = 0.151 seconds.

Therefore, it will take the quarter 0.151 seconds to reach the ground.

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Answer:

I think it is 1,200.

Explanation:

In the research I found, It says in a paragraph it is 1,200. I don't know if this is wrong or correct. I hope this helps!!!

Answer:

These layers are the troposphere, the stratosphere, the mesosphere and the thermosphere.

A further region, beginning about 500 km above the Earth's surface, is called the exosphere.

Explanation:

Hope this helps you. Have a nice day. Please mark as brainliest. It helps a lot.^_^

Answer:

c

Explanation:

because if a tennis ball hit a tennis racket still it would not go anywhere. with the tennis ball hitting the moving racket it will go further

One that is in motion because both the ball and the racquet will contribute momentum.

Thus, option (c) is correct.

Newton's third law of motion states that for every action, there is an equal and opposite reaction.

When the tennis ball hits a tennis racquet in motion, both the ball and the racquet will exert forces on each other in opposite directions.

This interaction will result in a transfer of momentum from the racquet to the ball and vice versa, potentially giving the ball a greater momentum and therefore potentially causing it to go farther.

Thus, option (c) is correct.

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Answer:

Electron, proton and neutron

Explanation:

In each and every atom they are consist of electron, proton and neutron.

Answer:

you just calculate the time in the two cases then add. I decided to convert into minutes and seconds

Answer:

A. Millimeters

Explanation:

C. is a unit of weight-wrong

D. is a unit of volume-wrong

B .kilometers are too large

Answer: A. Millimeters

Explanation:

Because it is more reasonable

Answer:

Control variable

Random variable

If two objects are dropped, they both hit the ground at the same time.

Answer:

atoms

Explanation:

i dont know

im  pretty sure it atoms

Answer: ΔPEg = mgh

Explanation: Increases in height and the acceleration due to gravity. The gravitational potential energy of an object near Earth's surface is due to its position in the mass-Earth system.

Answer:

The answer is A: Electron

Because they are loosely bounded and can be easily transferred. The protons are bounded to the nucleus so they cant be transferred.

It cant be an atom or a molecule.

Explanation:

Answer:

An element is a pure substance and is made of only one type of atom.

Explanation:

It cannot be broken down into a simpler substance.

Answer:

Each of the joints represents a degree of freedom in the manipulator system and allows translation and rotary motion :) Hope this helps

Answer:

An electron's mass is only 1/1,836 the mass of a proton. An electron is therefore considered nearly massless in comparison with a proton or a neutron.

Answer:

thermosphere!!

Explanation:

thermosphere has the lowest air pressure!!

Answer:

firts divide then multiply divide again and your and your answer should d

[tex]\\ \sf\longmapsto s=ut+\dfrac{1}{2}at^2[/tex]

[tex]\\ \sf\longmapsto 163=0(6.92)+\dfrac{1}{2}a(6.92)[/tex]

[tex]\\ \sf\longmapsto 163=3.46a[/tex]

[tex]\\ \sf\longmapsto a=\dfrac{163}{3.46}[/tex]

[tex]\\ \sf\longmapsto a=47.1m/s^2[/tex]

Answer:

1) 1kg

2) 9.81kg

4) 5N

5) 4N

6) 0N

7) 0N

8) 13

Explanation:

Given the time, the final velocity and the acceleration, we can calculate the initial velocity using the kinematic equation A:

[tex]v = v_o + a \Delta t[/tex]

A skateboarder flies horizontally off a cement planter. After a time of 3 seconds (Δt), he lands with a final velocity (v) of −4.5 m/s. Assuming the acceleration is -9.8 m/s² (a), we can calculate the initial velocity of the skateboarder (v₀) using the kinematic equation A.

[tex]v = v_o + a \Delta t\\\\v_o = v - a \Delta t = (-4.5 m/s) - (-9.8 m/s^{2} ) \times 3 s = 24.9 m/s[/tex]

Given the time, the final velocity and the acceleration, we can calculate the initial velocity using the kinematic equation A:

[tex]v = v_o + a \Delta t[/tex]

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Answer:

A

Explanation:

A situation that involves the transfer of heat by means of convection must involve the exchange of fluid currents such as land and sea breezes.

Heat transfer by convection is a method of heat transfer by which heat is transferred between two bodies through through currents of moving fluids or gases.

The following are examples of heat transfer by convection;

Thus, a situation that involves the transfer of heat by means of convection must involve the exchange of fluid currents such as land and sea breezes.

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Answer: 4 times

Explanation:

KE1 = (1/2)mv^2

KE2 = (1/2)m(2v)^2 or (1/2)m*4v^2

KE2/KE1 = ((1/2)m*4v^2)/((1/2)mv^2) = 4 times

Answer:

6.86g/mL

Explanation:

The density of the metal would be approximately 6.859 grams per milliliter (g/mL).

Given that the mass (m) is 78.2 g and the volume (V) is 11.4 mL, we can plug these values into the formula:

Density is a physical property that quantitatively expresses how much mass is contained within a given volume of a substance. In other words, it is a measure of how tightly packed the particles or molecules of a material are. Mathematically, density is defined as the mass of an object (or substance) divided by its volume. It is often denoted by the Greek letter "ρ" (rho).

Density is defined as mass per unit volume. The formula for density is:

Density (ρ) = Mass (m) / Volume (V)

Density (ρ) = 78.2 g / 11.4 mL

Now, let's calculate the density:

Density (ρ) = 6.859 g/mL

So, the density of the metal is approximately 6.859 grams per milliliter (g/mL).

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Explanation:

→ Uses of Convex Mirror

• Convex mirrors are often used in the hallways of buildings including stores, schools, hospitals, hotels and apartment buildings.

• They are used in driveways, roads, and alleys to provide safety to all the bikers and motorists at curves and turns and other places where there is a lack of visibility.

• They are also used in some automated teller machines as a handy security feature that allow user to see what all is happening behind them.

• They are used in passenger side mirror on a car and somewhere it is labelled as “objects in mirror are closer than they appear” to warn the driver.

→ Uses of concave mirror :

• Head mirrors

• Shaving mirrors

• Headlights

• Ophthalmoscope (optical instrument)

• Solar furnaces

• Astronomical telescopes

Answer:

the answer is b

Explanation:

Explanation:

Because water has no uniform rate of expansion and it vaporizes easy when temperature increases that makes it difficult to read.