Someone please help me figure this out

Answer:

The third one

Explanation:

That's how reflections work.

Answer:

The vibrational frequency of the rope is 5 Hz.

Explanation:

Given;

number of complete oscillation of the rope, n = 20

time taken to make the oscillations, t = 4.00 s

The vibrational frequency of the rope is calculated as follows;

[tex]Frequency = \frac{number \ of \ complete \ vibrations}{time \ taken} \\\\Frequency = \frac{20 }{4 \ s} \\\\Frequency = 5 \ Hz[/tex]

Therefore, the vibrational frequency of the rope is 5 Hz.

Answer:

B

Explanation:

Answer:

Bromine is heavier than air in terms of its atomic weight. Look at the periodic table bromine is lower than oxygen, nitrogen, etc. bromine in its gaseous phase will still float in air. This is due to the fact that gaseous bromine takes up a wide volume of space while having little mass.

Answer:

C.

Jupiter because of its strong gravitational force

Explanation:

Jupiter planet has the most important role in changing the direction of a comet's path. The correct option is C.

Gravity is a fundamental force in the universe that causes objects with mass or energy to attract one another. It is a force of attraction between any two objects in the universe that have mass. The force of gravity is directly proportional to the masses of the objects and inversely proportional to the distance between them.

Mathematically,

F=G×m1×m2/r²

The gravitational force is the force of attraction between two objects due to their masses. It is the force that causes objects to be drawn toward one another.

The strength of the gravitational force between two objects is determined by the mass of each object and the distance between them. The larger the mass of an object, the greater its gravitational force, and the closer two objects are, the greater their gravitational force.

Gravitational force is responsible for keeping the planets in orbit around the sun, for the tides on Earth, and for many other natural phenomena. The gravitational force is one of the four fundamental forces of nature, along with the strong nuclear force, the weak nuclear force, and the electromagnetic force.

Here in the question

Jupiter's strong gravitational force can significantly influence the trajectory of a comet, causing it to change direction or even collide with the planet. This is due to Jupiter's massive size, which creates a powerful gravitational pull that can affect objects within its vicinity. In fact, Jupiter is often referred to as the "vacuum cleaner of the solar system" because it has such a strong gravitational pull that it can attract and capture comets and asteroids.

Hence C. Jupiter because of its strong gravitational force, plays a most important role in changing the direction of a comet's path.

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Answer:

p=6000W

Explanation:

p=w/t

w=f*d=7800*5=39000 J

therefore,

p=39000/6.5=6000 W

Answer:

p=6000W

Explanation:

Answer:

A)    I_total = 16 m, B)   I_total = 8 m,  C)   I_total = 8 m, D)  I_total = 8 m

Explanation:

The moment of inertia is a scalar quantity, therefore the total moment of inertia

          I_total = I₁ + I₂ + I₃ + I₄

the moment of inertia of a point mass with respect to an axis of rotation

         I = m r²

Let's apply this to our case

A) Rotation axis at the origin

     I₁ = m 0 = 0

for the second masses, we find the distance using the Pythagorean theorem

     r = [tex]\sqrt{2^2 + 2^2}[/tex]

     r = 2 √2

     I₂ = m (2 √2) ²

     I₂ = 8 m  

     I₃ = m 2² = 4 m

     I₄ = m 2² = 4 m

we substitute

     I_total = 0 + 8m + 4m + 4m

     I_total = 16 m

B) axis of rotation in the center of the square

let's find the distance to any mass

     r = [tex]\sqrt{1^2+ 1^2}[/tex]

     r = √2

     I₁ = m 2

     I₂ = m 2

     i₃ = m 3

     I₄ = m 4

we substitute

    I_total = 4 (2m)

    I_total = 8 m

C) axis of rotation is the x axis

       I₁ = 0

       I₂ = m 2² = 4 m

       I₃ = m 2² = 4 m

       I₄ = 0

       I_total = 8 m

D) axis of rotation is the y-axis

       I₁ = 0

       I₂ = 4m

       I₃ = 0

       I₄ = 4 m

       I_total = 8 m

Answer:

3a, 2b,4c,1d

Explanation:

what do I need to explain just something you know

Answer:

F = 0.0112 N

Explanation:

Given that,

Masses, [tex]m_1=m_2=6500\ kg[/tex]

The distance between masses, d = 0.5 m

We need to find the gravitational force between two large trucks. The formula for the gravitational forces is given by :

[tex]F=G\dfrac{m^2}{r^2}\\\\F=6.67\times 10^{-11}\times \dfrac{6500^2}{(0.5)^2}\\\\F=0.0112\ N[/tex]

So, the required force between masses is equal to 0.0112 N.

Answer: the answer is c (think bc im on that too)

Explanation:

The interference is a  type of wave interaction shown in the photo. Option A is correct.

The result of two or more wave trains flowing in opposite directions on a crossing or coinciding pathways. This phenomenon is known as the interference of waves.

The effect is the sum of the individual wave amplitudes at each site where more than one wave is present.

When two wave pulses are traveling along a string toward each other. They meet and the phenomenon is occur known as interference.

The interference is a  type of wave interaction shown in the photo

Hence option A is correct.

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Answer:

Forces, Gravity, Friction, Direction, Acceleration.

The answers for the fill-in-the-blanks would be  Force, gravity friction

direction and acceleration respectively.

It can be defined as the force by which a body attracts another body towards its center as the result of the gravitational pull of one body and another,

There are a few ways that moving objects are impacted. Pushes and pulls, or force, have an impact on how an object moves.

The force of gravity drags items toward the Earth.

Friction is a force that causes objects to move more slowly or even come to a stop.

It also applies to an item that is reversing course or slowing down. Since acceleration is a change in velocity, it can also be a change in speed or direction.

Thus, Force, gravity friction direction, and acceleration are the answers respectively.

Learn more about gravity from here,

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Answer:

KE = 1/2 M V^2      Equation to express kinetic energy

Since the result depends linearly on M and to the second power on V,

V has greater effect on the result.

Answer:

can you ask clear questions I did not understand your question

Answer:

energy that is stagnant and cannot be changed

Answer:

Potential energy is a form of mechanical energy in which an object is at rest or it's not moving

Answer:

Eat vegetables and make the stairs

Explanation:

because when the stairs are less deep you use less forced to go up them.

A Carnot heat engine is a theoretical engine that operates on the Carnot cycle. The basic model for this engine was developed by Nicolas Léonard Sadi Carnot in 1824. ... In the process of going through this cycle, the system may perform work on its surroundings, thereby acting as a heat engine.

Mass of the bird(m) = 150 g = 0.15 kg

Speed (v) = 10 m/s

Kinetic Energy = [tex]\frac{1}{2}m v^{2} = \frac{1}{2} 0.15 (10)^{2}[/tex] = 7.5 J

Altitude (h) = 15 m

Gravitational Potential Energy = (0.15)(9.81)(15) = 22.0725 J

Mechanical Energy = Kinetic Energy + Potential Energy = 7.5 + 22.0725

= 29.5725 J

Answer:

"0.758315 sec" is the appropriate choice.

Explanation:

The given values are:

Angular speed,

= 29 rad/s

or,

= [tex]\frac{29}{2 \pi} \ rps[/tex]

Tire rotates,

= 3.5 times

Now,

The time interval will be:

⇒  [tex]\Delta t=\frac{3.5}{\frac{29}{2 \pi} }[/tex]

⇒       [tex]=\frac{2 \pi\times 3.5}{29}[/tex]

⇒       [tex]=\frac{21.99}{29}[/tex]

⇒       [tex]=0.758315 \ sec[/tex]

Answer: 0.25 m/s

Explanation:  Speed = wavelengt · frequency  

v = λf   and frequency is 1/period  f = 1/T

Then v = λ/T = 5 m / 20 s = 0.25 m/s

Answer:

Try a Cold Pack. Use a Heating Pad or Hot Compress. Ease Pressure on Your Scalp or Head. Dim the Lights. Try Not to Chew. Hydrate. Get Some Caffeine. Practice Relaxation.

Answer:

Listen to calming music

Explanation:

Thats what I do. You could also sleep ;)

The carbon cycle refers to the processes by which carbon in the biosphere is recycled. Photosynthesis sucks carbon dioxide out of the atmosphere, while cellular respiration releases it into the environment. Photosynthesis is the process by which solar energy reaches a plant and is converted into glucose.

How photosynthesis and cellular respiration are similar:

Photosynthesis is a method by which plants and other organisms transform light energy into chemical energy, which is then released to fuel the organism's metabolic activities through cellular respiration.

Answer:

true

Explanation:

b/c anaerobic exercis helps type 2 diabetes

Answer:

Javelin Throw (My favorite event)

Explanation:

Javelin Throw is a spear about 8 feet long and is used to throw for maximum distance.The participant runs first within a predetermined area and then throws the javelin.

If you have any questions revolving around this this topic,feel free to ask me and I will be happy to help,Good luck! :)

Answer:

100 joules (J).

Explanation:

Converting Units - 36 km/h = 10 m/s

                               72 km/h = 20 m/s ( 1 km/h =  5/18 m/s)

Change in speed = 20 - 10 = 10 m/s

Applying the Work-Energy theorem,

[tex]Work done = \frac{1}{2} 2 (10)^2[/tex]

                 = 100 J.

Answer:

the answer is 1500 because of the internet

Explanation:

use the diagram^

horizontal velocity of the object nvr changes, it'll stay 50m/s till it hits the ground

initial vertical velocity = 0

to find the final vertical velocity, use the formula:

[tex]v {}^{2} = u {}^{2} + 2as[/tex]

where u = 0m/s, a = 9.8m/s², and s = 2000m

solve for v.

for time taken to reach ground, use the formula:

[tex]v = u + at[/tex]

where v = the value for v u calculated above, u = 0 m/s, a = 9.8m/s² and solve for t.