correct answer choice??


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Answer: True

Explanation: Oxygen is important to every cell in your body. Without it, your cells can't make energy, and their metabolism is less effective.

Explanation:

true. your red blood cells need energy to process through your blood and body. your lungs need oxygen to breathe. the oxygen travels through your lungs into your blood to the organs and tissues which all help the body function

Hi there!

To find the final velocity of an object dropped from rest, we can used the simplified equation:

vf = √2gh

Plug in the given values: (g = 9.8 m/s²)

vf = √2(9.8)(100) ≈ 44.272 m/s

How To:

How do you add two vectors?  

To add or subtract two vectors, add or subtract the corresponding components. Let →u=⟨u1,u2⟩ and →v=⟨v1,v2⟩ be two vectors. The sum of two or more vectors is called the resultant. The resultant of two vectors can be found using either the parallelogram method or the triangle method .

Answer:

8 meters

Explanation:

40/ 5 = 8

Answer:

2120000m^2

Explanation:

1300* 1660 and there is 3 significant figures, so the 9 would make the  round to a 2.

Answer:

The water acts like a lubricant therefore has a smooth motion over the ice.

Hello!

4.07x10^16

The number of significant figures is [tex]3[/tex], because all the zeroes are not significant.

Hope this helps!

~Just a joyful teen

[tex]GraceRosalia[/tex]

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The required number is :

[tex]4.14 \times 10 {}^{3} [/tex]

The number of significant figures = 3

Refer to attachment for solution ~

Answer:

Contact time—or “wet time”—is how long a disinfectant needs to stay wet on a surface in order to be effective

Explanation:

Contact times can range from as little as 15 seconds for common hand sanitizer, to as long as 30 minutes for chlorine oxides used in laboratories.

We want to see why electromagnets are more useful in modern technologies.

We will see that the correct option is D:

"By controlling the current, electromagnets can be turned on and  off."

An electromagnet is, as the name implies, a magnet that works with a power supply.

Why these are more useful than normal magnets?

Because you have more control over them. By controlling the current, you not only can turn it on and off, but you also could regulate the strength of the magnetic field.

This extra control is what makes the electromagnet a better option than a permanent magnet.

So the correct option is D: "By controlling the current, electromagnets can be turned on and off"

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Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 36 g

volume = 6 cm³

We have

[tex]density = \frac{36}{6} = 6 \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

Explanation:

Answer:

ExplaMeasurements of the height of various plants in an experiment are called (Data).nation:

To convert 15 gallons of gasoline to chemical energy in joule, multiply the figure above by 15 which is 1,800,000,000 Joules. Answer to b part is 60KWhrs

a.) A gallon of gasoline in most countries contain about 120 millions joule of chemical energy.

To convert 15 gallons of gasoline to chemical energy in joule, multiply the figure above by 15. That is,

Chemical energy = 15 x 120000000 = 1,800,000,000 Joules

b.) Also, the amount of energy cost per gallon of gasoline produced in most countries is equivalent to about 4 kilowatt hours. The capacity that would be equal to the energy in 15 gallons of  gasoline that a battery should have will be

Capacity = 4 x 15 = 60 KWhrs

Therefore, the capacity a battery will have to be equal to the energy in 15 gallons of gasoline will be 60 KWhrs.

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Answer:

1) writing homework

2) Helping homeless people

3) Teaching

Explanation:

1)You can finish your homework by your skill.

2)You can help homeless people buy your working skill.

3) You can teach people by your educative skill.

Please give Brainliest

Answer:

(1)lower frequency

(2)lower amplitude

(3)higher frequency

(4)higher amplitude

Mr. lyall wanter to hear a music (lower frequency and lower amplitude) but, the student was playing a noise (higher frequency and higher amplitude)

Explanation:

brainliest plz

Hi there!

Since the string is light and there is no friction in the pulley, the acceleration of the system is equal to the acceleration of both blocks.

We can begin by summing the forces of each block:

Block on incline:

- Force of gravity (in the negative direction away from the acceleration)

- Force of Tension

∑F = -M₁gsinФ + T

Block hanging:

- Force of gravity (Positive, in direction of acceleration)

- Force of Tension (Negative, opposite from acceleration)

∑F = M₂g - T

Sum both of these net forces for each block:

∑Fт = -M₁gsinФ + T - T + M₂g

∑Fт = -M₁gsinФ + M₂g

Divide by the mass to solve for acceleration:

[tex]a = \frac{-M_1gsin\theta+M_2g}{M_1+M_2}[/tex]

Plug in the given values:

[tex]a = \frac{-(15)(9.81)(sin20)+19(9.81)}{15+19} = 4.002 m/s^2[/tex]

The magnitude of the acceleration of the 19-kg block is 4.0 m/[tex]s^{2}[/tex].

The 15-kg block is accelerating down the ramp, and the 19-kg block is accelerating up. The string connecting the two blocks is taut, so it must be applying a force to both blocks. The force of the string on the 15-kg block is equal to the force of the string on the 19-kg block.

Let's call the force of the string on the 15-kg block T. We can use Newton's second law to write two equations for the acceleration of the two blocks:

For the 15-kg block: T - mg sin(θ) = 15a

For the 19-kg block: T = 19a

where:

m is the mass of the block

g is the acceleration due to gravity

θ is the angle of the ramp

a is the acceleration of the block

Plugging the second equation into the first equation, we get:

19a - mg sin(θ) = 15a

Solving for a, we get:

a = (mg sin(θ)) / (4m)

= (15 kg * 9.8  m/[tex]s^{2}[/tex] * sin(20°)) / (4 * 15 kg)

= 4.0 m/[tex]s^{2}[/tex]

Therefore, the magnitude of the acceleration of the 19-kg block is 4.0  m/[tex]s^{2}[/tex].

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When designing running shoes, the most useful bio metric is the average weight of a runner.

Usually, running shoes are designed with the particular concerns of the user in mind. A very useful biometric when designing running shoes is the average weight of the runner.

This is important because a heavier runner, for instance, will hit the ground with a greater force leading to greater impact. It is necessary that these runner have shoes that help to cushion this higher impact.

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Answer:

Describe the process of boiling

Answer:

i think it might be 5

sry if im wrong

The displacement of the object during these 2.0seconds is; 32 meters west

According to the question;

However, since the acceleration of the object is in the opposite direction; the equation of motion that can be used to find the Displacement is;

By substituting values as given in the question; we have;

S = 32m west

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The voyager program was a space exploration program created to be the first to travel and explore the outer reaches of our solar system and beyond.

The voyager space probes were launched in 1977 and are still functional to this day, making them the longest running space exploration mission. The purpose of the voyager space probes is to relay information back to earth on the various planets and interplanetary objects they fly by.

Through these missions, NASA has received information regarding:

and much more, making it already an extremely successful mission.

The voyager spacecrafts were designed and built by the United States of America with government funding and contributions from other renowned space agencies.

As of 2021, voyager 1 is moving with a velocity of 61 thousand km per hour , with voyager 2 moving at roughly 55 thousand km per hour putting them beyond the outer reaches of the inner solar system. This along with the many important finds they are responsible for make them worth the 890 million dollars they cost to build.

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Given terms :

As we know, Distance covered is equal to :

Answer:

No Time

Schedule activities into your day and use an exercise log so you can see how little time it takes.

Build activities into everyday tasks no matter where you are: Bike to work. Use the stairs. Take walk breaks at work. Garden. ...

Find an activity you enjoy that works for your schedule

Answer:

The total distance covered by the student is 35 meters because -15+ 0 + 20 = 35.

Answer: D

Explanation: The weather is making the Bits of rock and the glaciers are moving it so that is weathering.

Answer:

at the top of the ramp before dropping in

Explanation:

Potential energy is basically the build up of energy before it's released.