I need help as fast as possible please
Will mark BRAINLIST and will give thanks only to correct answers
Thank you so much!

Answer:

that is which produces Sound

Answer:

The right answer is "stores"

Explanation:

All objects that are moving will have some energy in their kinetic energy store.

Answer:

To start something moving, a push force must be greater than resisting forces such a friction.

Explanation:

The force of resistance, for example friction, slows things down, so the push force must be greater in order to increase the speed or to start something moving.

Answer:

Answer:

True

Explanation:

Modulation waves(schemes) can be analog or digital. An analog modulation scheme has an input wave that varies continuously like a sine wave.

Answer:

Home run

Explanation:

i play

the answer is definitely A.

Answer:

The net force is 21 N, and the bag will go to the right.

Explanation:

You can find the net force by adding both values of the boy and the girl, and then subtracting four from it. You can also figure out which direction its moving by looking at which side is exerting the most force, which would be the right side.

Hope it helps!

Answer:

The mass of the boulder remains constant, while its weight decreases with respect to the value of gravitational force on the moon.

Explanation:

The mass of the boulder = 15 kg

On the earth, its mass remains 15 kg. But its weight is;

weight = m x g

           = 15 x 9.8

           = 147 N

The boulder's weight on the earth is 147 N.

When transferred to the moon, the mass remains constant i.e 15 kg. But its weight decreases due to a change in the value of acceleration due to gravity on the moon. Thus, the boulder becomes lighter in weight.

Answer:

b

Explanation:

The correct choices, sequentially and respectively, are c.,  d.,  d.,  a.,  d.

Answer:

He should report his findings to a reputable science journal.

Answer:

Directly Proportional

Explanation:

Gravitational force can be calculated with the equation F = g(m1 * m2)/ r^2

So if we increase mass, force will also increase because mass is in the numerator.

The basic reason is that before 2007 their were not enough energy in the liquid methane molecules to break the bond between them after 2007 the energy of the molecules increases which breaks the bond and the liquid methane changes phase.

It had been summer since 2002, but the lake didn’t evaporate until  2007.

The molecular attraction between methane molecules is stronger the amount of energy absorbed by liquid methane was not enough to break the inter molecular forces until 2007.

After 2007, the sun had transferred enough energy so that the kinetic energy of the methane molecules increased enough to overcome the attraction between them.

The liquid methane evaporated and the molecules started moving away from each other.

Thus the liquid methane starts to change phase after 2007 by getting enough energy from the sun.

To know more about the phase change follow

https://brainly.com/question/25664350

Answer:

Violations. A violation occurs when a player violates the rules in a manner which does not result in physical contact ( e.g. throwing a pass during an approach to the goal line; illegal guarding position by the marker; not establishing a pivot foot after carrying the disc in from out-of-bounds, etc.)

The object of Ultimate Frisbee is to gain points by scoring goals. The disc may only be passed, and a goal is scored when a player successfully passes the disc to a teammate in the end zone which that team is attacking. The team with the most points at the end of the game is declared the winner.

Explanation:

Vert (Vertical) Stack – The most common offensive play in Ultimate Frisbee. The Mailman – An intense offensive tactical maneuver to guarantee a gain of at least 70% of the field. TurboDisc – Can be added to almost any play to ensure max effectiveness.

If contact occurs and the thrower drops the disc, the count stops until the thrower picks up the disc and continues with play. The defensive player will have to back up 5 yards (15 feet) to allow a free throw from the offensive player.

Answer:

[tex]a=\frac{v^2}{r}[/tex]

[tex]v=\sqrt{a*r}[/tex]

[tex]r=\frac{v^2}{a}[/tex]

Explanation:

This is the formula for centripetal acceleration in terms of the tangential velocity (v) and the radius of the circular motion (r).  The expression for the acceleration is already given, so simply type it as shown:

[tex]a=\frac{v^2}{r}[/tex]

For the velocity (v) multiply by "r" both sides and then use the square root to solve for v:

[tex]a*r=v^2\\v=\sqrt{a*r}[/tex]

For the radius multiply both sides by r and then divide both sides by the acceleration (a) in order to isolate r completely:

[tex]a*r=v^2\\r=\frac{v^2}{a}[/tex]

Answer:

Mass = 25 kg

Height = 5 m

Acceleration due to gravity = 10 m/s

Work done

We know that

W = mgh

W = 25 × 5 × 10

W = 250 × 5

W = 1250 J

[tex] \\ \\ \\ [/tex]

Answer:

momentum= mass× velocity

=350kg (30-20) m/s

=3500kgm/s

Answer:

talking and we can make our own sound

Explanation:

Sound could be an element for detecting people or entities, This is very useful for blind people. Sounds could also heal your chakra or make you feel like dancing.

Hope I helped. :)

- Valenteer

At 30 degrees C, when 90 grams of NaNO3 is dissolved in 100  grams of water, the solution becomes UNSATURATED.

A saturated solution is a solution that doesn't completely dissolve the solute.

An unsaturated solution is a solution that has a lesser amount of solute than the saturated solution in which it is being dissolved. Thus, the solute will be completely dissolved in the solution at the end of the reaction process.

From the given information:

Since the mass of the solute is lesser than the solvent. It implies that the solute will dissolve completely in the solvent.

Therefore, the solution becomes unsaturated.

Learn more about  unsaturated solutions here:

https://brainly.com/question/11440974?referrer=searchResults

Answer:

 E_g = m 392 J,      Ek = m 392

Explanation:

Mechanical energy is a very important concept since if the system does not have friction it remains constant

the potential energy of a system is

          E_g = U = m g (y2 - i)

          E_g = m 9.8 (40 -0)

          E_g = m 392 J

The kinetic energy for this system assuming it started from rest

          E_k = K = ½ m v2

how mechanical energy is conserved

         E_g = E_k

         Ek = m 392

Explanation:

The local action of a battery is the deterioration of the battery due to currents that are flowing from and to the same electrode. ... Polarization is a defect that occurs in simple electric cells due to the accumulation of hydrogen gas around the positive electrode.

Answer:

chris gets 960 and molly gets 1440

Explanation:

add the ratio up and divide

2+3=5

2400/5=480

480x2=960

480x3=1440

960+1440= 2400

Answer:

Ear pain is the most common complaint from scuba divers. Some divers call it "ear squeeze." As a diver goes deeper under water and the outer environment pressure increases, the pressure in the middle ear (the part behind the ear drum) is "squeezed" by the increasing pressure of the water from outside