Please help with number 24

Answer:

static electricity

Helicopter rescue winch-men must dangle a metal wire below them so that it always touches the ground or water surface first. This discharges static electricity that may have built upon the helicopter.

Static electricity is a familiar electric phenomenon in which charged particles are transferred from one body to another. For example, if two objects are rubbed together, especially if the objects are insulators and the surrounding air is dry, the objects acquire equal and opposite charges.

Static electricity is generated by friction between two insulating materials. When the materials are rubbed together, electrons are removed from atoms within the materials, giving rise to a static electric charge.

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The final velocity ([tex]v_1_f[/tex]) of the first astronaut will be greater than the final velocity of the second astronaut ([tex]v_2_f[/tex]) to ensure that the total initial momentum of both astronauts is equal to the total final momentum of both astronauts after throwing the ball.

The given parameters;

The final velocity of the first astronaut relative to the second astronaut after throwing the ball is determined by applying the principle of conservation of linear momentum.

[tex]m_1v_1 + m_2v_2 = m_2v_2_f + m_1v_1_f[/tex]

if v₂ > v₁, then [tex]v_1_f > v_2_f[/tex], to conserve the linear momentum.

Thus, the final velocity ([tex]v_1_f[/tex]) of the first astronaut will be greater than the final velocity of the second astronaut ([tex]v_2_f[/tex]) to ensure that the total initial momentum of both astronauts is equal to the total final momentum of both astronauts after throwing the ball.

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Answer:

D. 3.6m/s

Explanation:

The equation for wave speed can be used to calculate the speed of a wave when both wavelength and wave frequency are known. Consider an ocean wave with a wavelength of 1.2 meters and a frequency of 3 hertz. The speed of the wave is: Speed = 1.2m x 3wave/s = 3.6 m/s

Answer:

twice more but I have to make it 20 characters so h8 how u doing I hear yelling outside my room and exstasional dread in my head

If the mass of the truck is doubled, the force of friction is doubled, and the skidding distance is doubled.

Hence, the correct option is C.

The skidding distance is proportional to the mass of the truck. If the truck is heavily loaded so it has twice the total mass, the skidding distance will be twice as far.

This is because the force of friction is proportional to the normal force, which is in turn proportional to the mass of the truck. The greater the mass of the truck, the greater the force of friction, and the longer the skidding distance.

In equation form, the skidding distance is given by:

s = μ * d / f

where:

s is the skidding distance

μ is the coefficient of friction

d is the distance traveled before the truck stops

f is the force of friction

The force of friction is given by:

f = μ * mg

where:

m is the mass of the truck

g is the acceleration due to gravity

Therefore, If the mass of the truck is doubled, the force of friction is doubled, and the skidding distance is doubled.

Hence, the correct option is C.

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Answer:

2

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:

1.02s

Explanation:

In this situation the following equation will be useful:



Where:

 is Marissa's car  final velocity

 is Marissa's car initial velocity

 is Marissa's car constant acceleration  (assuming this is the acceleration, since 1269 m/s^{2} does not make sense)

 is the time  it takes to accelerato from  to 

Answer:

I am pretty sure that it is A. The Sun and all the planets revolve around Earth. Hope this helps!!!!!

Explanation:

Answer:

5s

Explanation:

initial distance: 0 m

distance: ? (we don't know)

initial velocity: 0 m/s

velocity: 30 m/s

acceleration: 6 [tex]m/s^{2}[/tex]

time: ? (we are looking for)

v = v0 + at

plug the numbers in:

30 = 0 + 6(t)

= 30 = 6t

= t = 5

5s

This question involves the concepts of Pythagora's Theorem and derivatives.

The plane's distance is increasing at a rate of "105.6 ft/" (OR) "72 mph".

First, we will write an expression for the distance between the person and the plane in terms of time. For that purpose, we will use Pythagora's Theorem. Here, the altitude will act as perpendicular, the horizontal distance on the ground will be the base, and the straight line distance between the plane and the person will be the hypotenuse.

[tex]Hyp^2 = Base^2+Perp^2\\s^2 = (vt)^2+(32000\ ft)^2\\s=\sqrt{(vt)^2+(32000)^2}[/tex]

where,

s = plane's distance from the person

v = horizontal speedof the plane = [tex](120\ mph)(\frac{1.47\ ft/s}{1\ mph})[/tex] = 176 ft/s

t = time

Therefore,

[tex]s=\sqrt{(176t)^2+(32000)^2}[/tex]

Taking the derivative with respect to time:

[tex]\\\\\frac{ds}{dt} = \frac{1}{2}\frac{(2t)(176)^2}{\sqrt{(176t)^2+(32000)^2}}\\\\\frac{ds}{dt} = \frac{61952\ t}{2s}[/tex]

where,

[tex]\frac{ds}{dt}[/tex] = rate at which plane's distance is increasing from the person = ?

s = distance = [tex]\sqrt{(24000\ ft)^2+(32000\ ft)^2} = 40000\ ft[/tex]

t = time = [tex]\frac{horizontal\ distance}{v} = \frac{24000\ ft}{176\ ft/s} = 136.36\ s[/tex]

Substituting these values in the equation, we get:

[tex]\frac{ds}{dt}=\frac{(61952)(136.36)}{(2)(40000)}[/tex]

[tex]\frac{ds}{dt}=105.6\ ft/s = 72\ mph[/tex]

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The attahced picture illustrates Pythagora's Theorem.

Answer:

ligma

Explanation:

sugondese

Explanation:

Answer:

the blue bumper car

Explanation:

because the yellow bumper car is coming in with much more force

and according to Newton, actions and reactions are equal and opposite, so the yellow bumper car will five out 300N while the blue car will give out only 100N

then it almost because a fight between 300N vs 100N

and obviously, the 300N will win and the 100N will be pushed back

Answer:

Option A can be correct because when the meat is kept the rump settles down and the meat is prevented from being messy everywhere.

Explanation:

Answer

float is the answer

Explanation:

- by nævis

Answer:

characteristics of electromagnetic waves:-

A characteristics Feature of electromagnetic waves that make them useful for transmitting signal is that they are easily transmitted through

In physics, electromagnetic radiation is defined as  waves created as a result of the electromagnetic field vibratons moving through space, carrying electromagnetic  energy. The waves produced  includes radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays.

The character of an electromagnetic wave is dependent on its frequency or wavelength making each electromagnetic spectrum having their own range of uses.

For transmitting signals, Radio waves as well as  Microwaves is useful , while the former help transmit  Information through radio and TV stations the later is used in satellite communications, this is because

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Answer:

F=ma

a= acceleration

F= force

m= mass

16N = 8m/s² x m

m= 16N/ 8m/s²

m= 2kg

Answer:

A. transverse waves

vote me brainliest?? 5/5

thanks:)

Answer:

32.5/s squared

Explanation:

Answer:

Stars create new elements in their cores by squeezing elements together in a process called nuclear fusion. First, stars fuse hydrogen atoms into helium. Helium atoms then fuse to create beryllium, and so on, until fusion in the star's core has created every element up to iron.

Explanation:

Hope this helps.

Answer:

hahahahahaha hahahahaha hahah

Answer:

kinetic mechanical energy

Answer:

Those sound waves are called kinetic mechanical energy

Explanation:

Sound energy is the result when a force, either sound or pressure, makes an object or substance vibrate. That energy moves through the substance in waves. Those sound waves are called kinetic mechanical energy.

Answer:

they are still keeping the physical componets justbin a different shape

Explanation:

Answer:

As an ice cube melts, its shape changes as it acquires the ability to flow. However, its composition does not change. Melting is an example of a physical change .

Answer:

8.2 mm / day * 1 m / 1000 mm = .00082 m / day    distance in 1 day

365 day / 1 yr * .00082 m / day = .30 m / yr

Made of rocks,metal and ice.

Answer:

Explanation:

Some objects have energy as a result of their shapes or positions. Energy that results from the position or shape of an object is called potential energy. Gravitational Potential Energy – potential energy related to an object's height.