Which of these is one of six most common elements found in the human body??

Height,h= 20m

"gently dropped" means initial velocity, u, =0m/s

Uniform acceleration, g=10m/s²

using the formula v²=u²+2gs

Substituting, v²=0²+2*10*20

v²=400

v=

[tex] \sqrt{400} [/tex]

v=20m/s

Time, t at which is strike the ground

using the formula v=u+at

Substituting, 20=0+10t

20=10t

t=2s

This means that the bank strike the ground with a velocity of 20m/s in 2s.

A metal ball and a wooden ball

hope it helps

Answer:

the answer is true Induction charging is a method used to charge an object without actually touching the object to any other charged object.

Explanation:

Answer:8.2N

Explanation:I did the quiz on k12 and that’s the answer i got :)

Answer:

The given Device is a :

Since at the left corner, The MFL (Magnetic field lines) are entering the solenoid OR terminating at this end, This end turns out to be the SOUTH POLE.

According to the arrows, The current is always in the direction of the magnetic field. So, The current is leaving the Solenoid at the top right corner.

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

Answer:

The name of the device is Solenoid. Left end represents South Pole. The current ( I ) is leaving the wire coil at the top right corner.

Explanation:

Hope you understand....

Answer:

3a^5 - (-a^5) = 3a^5 + a^5 = 4a^5

6a^7 - 2a^7 = 4a^7

-3a^5 - (-2a^5) = -3a^5 + 2a^5 = -a^5

7a^7 - 8a^7 = -a^7

Answer:

here ya go

Explanation:

Answer:

10 Pascal

Explanation:

[tex]pressure =\frac{force}{area}[/tex]

[tex]pressure= \frac{200}{20}[/tex]

pressure = 10 Pa

Answer:

large

Explanation:

the harder you pluck the louder it gets

If you pluck the guitar string hard, the sound waves it gives off will have larger amplitudes

We know that, for soundwaves, the amplitude is related to the intensity of the sound.

If you pluck the guitar string hard, you will notice that the intensity of the sound increases. So we can conclude that the amplitude of the soundwaves will be larger than if you plucked the guitar string softer.

Then the complete statement would be:

"The sound waves it gives off will have larger amplitudes."

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Answer:

[tex]V_a =1.4285m/s[/tex]

Explanation:

From the question we are told that

70 kg astronaut

5 kg ball

A velocity of 20 m/s east

Generally with Law of conservation of momentum in place for a body in space

initial and final momentum must be equal

Therefore

[tex]M_b*V_b=M_a*V_a[/tex]

[tex]M_b=Mass of ball \\V_b=Ball velocity \\M_a= Mass of astronaut \\V_a= Astronaut velocity[/tex]

Mathematically solving for[tex]V_a[/tex]

[tex]V_a =\frac{5*20}{70}[/tex]

[tex]V_a =1.4285m/s[/tex]

Therefore the Astronauts velocity relative to his mass is given to be

[tex]V_a =1.4285m/s[/tex]

The velocity of the astronaut is 1.43 m/s.

From Newton's third law of motion,

To get the velocity of the astronaut, we use the formula below.

Formula:

Where:

make V the subject of the equation

From the question,

Given:

Substitute these values into equation 2.

Hence, the velocity of the astronaut is 1.43 m/s.

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Answer:

kinetic energy to electrical energy.

Answer: The tile floor.

Explanation:

We can think of this as follows:

By the second Newton's law, we know that:

F = m*a

force is equal to mass times acceleration.

Now, as the egg hits the ground, we can think that there is a force that is applied in a very short period of time.

(similar to the case of a bat hitting a baseball)

Ok, the total energy of the impact will be the same for any surface in which the egg falls.

But suppose that the egg falls in a carpet, in this case, the carpet has a kinda large collision time (the time that the force is applied to the egg), this means that we will have a smaller force, acting for a long period of time. Now if the egg falls on something harder, like the tile floor, the collision time will be a lot shorter, then the force must be a lot stronger to compensate, this force is so large, that breaks the shell of the egg.

the tile floor is then the correct answer.

Answer:

400 kg-m/s

Explanation:

Given that,

Mass of the woman, m = 50 kg

Initial velocity, u = 8 m/s

Final velocity, v = 0 m/s

We need to find the change in momentum of the woman. It can be given by :

[tex]\Delta p=m(v-u)\\\\=50\times (8-0)\\\\=400\ kg-m/s[/tex]

So, the change in momentum is 400 kg-m/s.

Answer:

The new force of attraction between the two objects will be remain the same.

The gravitational law states that the gravitation force is the ratio of the product of the masses and the square of the distance between them.

Let the masses be m and M and the distance between them is r. Then the force is given as,

F = GmM / r²

Suppose that two objects attract each other with a gravitational force of 16 units.

F = 16

GmM / r² = 16 units

If the mass of both objects was doubled, and if the distance between the objects was doubled. Then we have

F' = G(2m)*(2M) / (2r)²

F' = 4GmM / 4r²

F' = GmM / r²

F' = 16 units

The new force of attraction between the two objects will be remain the same.

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Answer:

B. Increases

Explanation:

Momentum is given as [tex]p=mv[/tex]. Since [tex]m[/tex] is maintained, as the velocity decreases, the momentum decreases, and similarly, as the velocity increases, the momentum increases.

Answer:

Gravitational potential energy is greatest at the highest point of a roller coaster and least at the lowest point.

Answer:

13950kg

Explanation:

If we make the system both railroad cars, we know that the momentum of the whole system doesn't change because the forces are internal.

Let a be the mass of the second car.

The original momentum is 9300*15 kg*m/s+ a*0 kg*m/s = 139500 kg*m/s

After sticking together, the momentum is (9300+a)kg*6m/s, which should be equal to 139500 kg*m/s

Therefore (9300+a)*6 = 139500

9300+a = 23250

a = 13950 kg

Answer:

eeeeeeeeeeeeeeeeeeeeeeeeeeeee

Explanation:

Answer:

[tex]\boxed {\boxed {\sf 95,795 \ Joules}}[/tex]

Explanation:

Gravitational potential energy is found using the following formula.

[tex]E_p=m*g*h[/tex]

where m is the mass, g is the gravitational acceleration, and h is the height.

1. Define Variables

We know the anvil's mass is 115 kilograms and it's 85.0 meters above the coyote. Assuming this is on Earth, the acceleration due to gravity is 9.8 m/s²

[tex]m=115 \ kg \\h= 85.0 \ m \\g= 9.8 \ m.s^2[/tex]

2. Calculate Potential Energy

Substitute the values into the formula.

[tex]E_p=(115 \ kg)*(9.8 \ m/s^2)*(85.0 \ m)[/tex]

Multiply the first two numbers together.

[tex]E_p=1127 \ kg*m/s^2*(85.0 \ m)[/tex]

Multiply again.

[tex]E_p=95795 \ kg*m^2/s^2[/tex]

[tex]E_p=95795 \ J[/tex]

The anvil has 95,795 Joules of gravitational potential energy.

speed speed scalar quantity is the rate of at which an object covers distance on the other hand velocity is a vector quantity it is direction aware.velocity is the rate at which the position changes.the average velocity is the displacement or position change Per time ratio.so velocity is a vector quantity but speed is a scalar quantity

Answer:

i disagree because if you throw a ball in the air gravity will bring it down so only the force that moved it was needed.

Explanation:

Answer:

600J

Explanation:

w=f×s

=120×5

600J

therefore the work by a force applied to a box that moves 5m is 600J

Answer:

Friction is a resistive force to motion. When two bodies move against each other some of the kinetic energy is converted to heat energy due to friction. This reduces the total kinetic energy in the system.

Explanation:

Answer:

aww that's simple! its B can i get brainliest? i really need some points rn <3

Explanation:

Answer:

B

Explanation:

Answer:

The total kinetic and potential energies of its particles

The thermal energy of an object is the:

D. the total kinetic and potential energies of its particles

Thermal energy is the sum of the kinetic and potential energy of all the particles in an object.

Examples are Exothermic chemical reactions, such as oxidation, which convert the potential energy of the materials into thermal kinetic energy, thus increasing the resulting temperature.

Thus, option D is correct.

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Answer:

once the parachute is opened, the air resistance overwhelms the downward force of gravity. The net force and the acceleration on the falling skydiver is upward. ... The skydiver thus slows down. As the speed decreases, the amount of air resistance also decreases until once more the skydiver reaches a terminal velocity.

Explanation:

As the parachute is opened the air and due to the downward force of gravity the resource is upwards hence the skydiver falls slowly.

A parachutist is one who uses a parachute when making a skydive. Once the parachute is opened the air offers some resistance and due to the downward force of gravity.

The net force and force of acceleration are on the skydiver and a, as a result, he falls slowly. As the speed gets decreased the amount of air resistance will also decrease.

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Answer:

d= m/v

density is mass per unit volume.

Density describes how tightly packed particles are so if something is more dense the particles are going to be packed closely together and if something is less dense they will be looser and not as tightly packed.