What does it ​mean​ to go 20 m/s?

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

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Actually Welcome to the Concept of the Force and power.

Let's draw a free body diagram and solve it.

we get as,

====> Normal Force = 2.566 N

and

===> Frictional Force = 0.635 N

The net force depends on the magnitudes of the frictional force and the applied force.

The question is incomplete but I will try to help you the much I can. An inclined surface has to do with the use of an inclined plane. The static friction acts in opposition to the force that seeks to move the object up or down the plane.

The image of the question is missing hence numerical values can not be calculated. However, the net force depends on the magnitudes of the frictional force and the applied force.

Learn more about inclined surface: https://brainly.com/question/9904853?

Answer:

force pushed the object = 10 × 5 = 50N

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

the answer is definitely A.

Answer:

p = -8 kg-m/s

Explanation:

Given that,

Initial speed of the rock, u = 8 m/s

Mass of the rock, m = 1 kg

The ball travels up  to a maximum height, then returns to the ground.

We need to find the rock's momentum as it strikes the  ground. Let v be the final speed of the rock. Its final speed is as same as initial speed i.e. 8 m/s but in negative direction. So

p = mv

p = 1 kg × (-8 m/s)

= -8 kg-m/s

So, the rock's momentum as it strikes the  ground is (-8 kg-m/s).

Answer:

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.

Violin string E

!!!!!!!!!!!!!!

This question involves the concepts of the time period, orbital radius, and gravitational constant.  

The distance of Hailey's comet above the Earth's Surface is "3.19 x 10⁴ km".

The theoretical time period of the comet around the earth can be found using the following formula:

[tex]\frac{T^2}{R^3}=\frac{4\pi^2}{GM}[/tex]

where,

T = Time Period of Satellite = 75 years[tex](\frac{365\ days}{1\ year})(\frac{24\ h}{1\ day})(\frac{3600\ s}{1\ h})[/tex] = 2.36 x 10⁹ s

R = Orbital Radius = ?

G = Gravitational Constant = 6.67 x 10⁻¹¹ N.m²/kg²

M = Mass of Earth = 5.97 x 10²⁴ kg

Therefore,

[tex]\frac{(2.36\ x\ 10^9\ s)^2}{R^3}= \frac{4\pi^2}{(6.67\ x\ 10{-11}\ N.m^2/kg^2)(5.97\ x\ 10^{24}\ kg)}\\\\R=\sqrt[3]{\frac{(6.67\ x\ 10{-11}\ N.m^2/kg^2)(5.97\ x\ 10^{24}\ kg)(2.36\ x\ 10^9\ s)^2}{4\pi^2}}[/tex]

R = 3.83 x 10⁷ m = 3.83 x 10⁴ km

Now, this orbital radius is the sum of the radius of the earth (r) and the distance of comet above earth's (h) surface:

R = r + h

3.83 x 10⁴ km = 0.64 x 10⁴ km + h

h = 3.83 x 10⁴ km - 0.64 x 10⁴ km

h = 3.19 x 10⁴ km = 31900 km

Learn more about the orbital time period here:

brainly.com/question/14494804?referrer=searchResults

The attached picture shows the derivation of the formula for orbital speed.

Answer:

The final position made with the vertical is 2.77 m.

Explanation:

Given;

initial velocity of the ball, V = 17 m/s

angle of projection, θ = 30⁰

time of motion, t = 1.3 s

The vertical component of the velocity is calculated as;

[tex]V_y = Vsin \theta\\\\V_y = 17 \times sin(30)\\\\V_y = 8.5 \ m/s[/tex]

The final position made with the vertical (Yf) after 1.3 seconds is calculated as;

[tex]Y_f = V_yt - \frac{1}{2}g t^2\\\\Y_f = (8.5 \times 1.3 ) - (\frac{1}{2} \times 9.8 \times 1.3^2)\\\\Y_f = 11.05 \ - \ 8.281\\\\Y_f = 2.77 \ m[/tex]

Therefore, the final position made with the vertical is 2.77 m.

Answer:

Home run

Explanation:

i play

Answer:

momentum= mass× velocity

=350kg (30-20) m/s

=3500kgm/s

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:

 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

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:

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:

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

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:

v = 0.25 m/s

Explanation:

Given that,

The wavelength of a wave, [tex]\lambda=0.02\ m[/tex]

Time period of the wave, [tex]T=8\times 10^{-2}\ s[/tex]

We need to find the speed of a wave. The speed of wave is given by :

[tex]v=\dfrac{\lambda}{T}\\\\v=\dfrac{0.02}{8\times 10^{-2}}\\\\v=0.25\ m/s[/tex]

So, the speed of the wave is 0.25 m/s.

The factors that affect efficiency are //

Conductor content – load dependent.

Magnetic steel -mainly constant.

Thermal design – mainly load dependent.

Aerodynamic design – constant.

Manufacture and quality control – constant

Answer:

He should report his findings to a reputable science journal.

Answer:

b

Explanation:

Explanation:

ob 1 day

1day is the answer

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:

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

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