A person of mass 55 kg swings on a rope length 4 m from rest (when the rope makes an angle of 30 degrees with the vertical) and collides perfectly inelastically with a 70 kg person on the ground when the rope is exactly vertical. Determine the maximum angle the rope makes with the vertical after the 55 kg person picks up the 70 kg person.

The phenomenon is the term that best describes the phrase "something that happens", therefore the correct answer is option D.

The deliberate, scientifically justified quest and utilization of knowledge and comprehending of the natural and improvements in living standards are what is known as science.

As given in the problem,

Which term best describes the phrase "something that happens"?

A. Experiment

B. Observation

C. Hypothesis

D. Phenomenon

The phenomenon is the term used to define the process of happening things that may be natural or anthropologic.

Thus, The phrase "something that happens" is best described by the word "phenomenon," hence option D is the appropriate response.

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Answer:

B

Explanation:

Laboratories are usually controlled: however, in public places, there are way too many factors that could change an experiment

Answer:

Velocity has both speed and direction. Speed is constant. ... Speed is measured over time.

Explanation:

Answer:

Speed is a scalar quantity – it is the rate of change in the distance travelled by an object, while velocity is a vector quantity – it is the speed of an object in a particular direction.

Answer:

A. Particles in air move in circles as the wave moves forward.

B. Particles in air move forward but not backward as the wave moves

forward.

C. Particles in air move up and down as the wave moves forward.

✔ D. Particles in air move forward and backward as the wave moves

forward.

Explanation:

The waves transfer energy from the source of the sound, e.g. a drum, to its surroundings. Your ear detects sound waves when vibrating air particles cause your ear drum to vibrate. The bigger the vibrations the louder the sound.

Answer:

Sound waves travel at 342 m/s through the air and faster through liquids and solids. The waves transfer energy from the source of the sound, e.g. a drum, to its surroundings. your ear detects sound waves when vibrating air particles cause your eardrum to vibrate. The bigger vibrations the louder the sound.

Explanation:

Answer:

The sum of momenta of each object before and after collision is equal . Thus when they collide , their momentum will change but its sum will be sane as the sum of the momentum before collision

Answer:

1.It allows for movement.

2.t controls the breathing rate.

4. It controls the heart rate.

Explanation:

Answer:

1. Following the recoil principle, rockets use combustion (a controlled explosion) to work against earth's gravitational attraction.

2. A force is a push or a pull that acts upon an object as a results of its interaction with another object. ... These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction.

(via physicsclassroom.com)

3. The combustion throws out material with very high momentum and is, physically speaking, the action. In reaction to that that, the rocket moves away from it (upward when in starts and has the action underneath it)

4. To show the world that commercial manned space missions are safely possible. Some may also like the fact that the US can now do, or rather order, manned flights into space without the help of the russian space agency (Roskosmos).

5. Robert Behnken and Douglas Hurley

6. The international space station (ISS)

7. Yes, Stage 1 of the rocket landed on the drone ship. The crew opened the hatch to enter the space station after 21 hours and 39 minutes after the launch from Cape Canaveral.

8. To have private contractors such as SpaceX actively in the field, there are now more interest groups that participate in space travel. And they can interact with other companies as well.

Also, due to Musks dream and efforts of SpaceX, space travel seems to get a lot cheaper.

That might indeed open the way back to the moon and further to the Mars for human space flight.

Governments such as the US planned on such things for decades, but changed plans ever since, and routinely changed leadership and the opinion on what's important.

Now Spaceflights can become less politically motivated and more commercially. That seems to be a more stable way over long periods of time.

(wrote most of it for you myself, even tough I'm not a native English speaker. would really appreciate the brainliest if you appreciate the work)

Answer:

yhgfty

Explanation:

cdfgv

The concept that must be used to solve this problem is linked to Newton's laws of gravitation. Newton defined the gravitational attraction force as the product between the universal constant of gravitation, by the masses of each object, all this because of the change in the squared distance that separates them, mathematically it can be expressed as,

[tex]F_G = \frac{G m_1 m_2}{r^2}[/tex]

Here,

G = Gravitational Universal Constant

[tex]m_{1,2}[/tex] = Mass of each object

r = Radius

Our values are,

[tex]G = 6.67*10^{-11}N\cdot m^2/kg^2[/tex]

[tex]m_1 = 300kg[/tex]

[tex]m_2 = 140kg[/tex]

[tex]r = 1.7m[/tex]

Replacing,

[tex]F_G = \frac{(6.67*10^{-11}N\cdot m^2/kg^2 )(300kg)(140kg )}{(1.7m)^2}[/tex]

[tex]F_G = 9.7*10^{-7} N[/tex]

Answer:

It helps us to be aware of some things that guide us and laws or theories to help us learn further

Answer: RIGHT angles

Explanation:

The pressure of gas produces a net force, i.e., the sum of all the forces at right angles to the wall of a container.

A key idea in physics is pressure, which is measured as the amount of force per unit area acting perpendicular to a surface.

Imagine holding a tack between your forefinger and thumb, with the head on your forefinger and the pointy end on your thumb, and lightly pressing it there to comprehend pressure. The forefinger will not experience discomfort, but the thumb will feel it right away. The thumb is under the same amount of pressure as the forefinger due to the tack's limited surface area, but the pressure on the thumb is significantly greater.

A net force pressing on the container walls is created as a result of collisions with the container. Gas pressure is a result of this force acting perpendicular to the container walls. A pressure gauge can be used to measure this pressure.

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Answer:

C. Electromagnetic waves are longitudinal waves

Explanation:

Answer:

the answer is c

Explanation:

Answer:

can you please translate to english?

Explanation:

Explanation:

A) 1 kg = 1000g

2500kg = 2500000g

B 1 hour = 3600 sec

335 hour = 1206000sec

C 1day = 24 hours

1 hour = 3600 sec

24 hours = 86400sec

Answers:

a. 2500000 grams

B. 1206000 seconds

c. 86400 seconds.

Look at the attached picture

Hope it will help you

Good luck on your assignment

Answer:

like repel unlike attract

Explanation:

mmwwwwwww

Answer:

here is the answer

Explanation:

a) since displacement is given as a negative value, object must travelling i the negative direction (with respect to a cartesian plane).

b) after 1 second

v = u + at

v = -4 + 3× 1

v = -4 + 3

v = -1 m/s

after 2 seconds

v = -4 + 3×2

v = -4 + 6

v = 2 m/s

after 3 seconds

v = -4 + 3×3

v = -4 + 9

v = 5 m/s

c) we need to find the position after three seconds

initial velocity= u= -4m/s

final velocity = v= 5 m/s  ( as previously calculated)

acceleration=3m/s²

s = ut + 1/2 × at²

s = -4×3 + 1/2 × 3×(3)²

s = -12 + 1/2 × 27

s = -12 + 27/2

s = 1.5 meters   ( in the positive direction; as time has increased and acceleration in positive)

position = -2 + 1.5 = -0.5 meters

(s indicates distance travelled)

Answer:

final speed is (3.5 + 1.5) = 5 m/s

Explanation:

If it accelerates for 3 seconds with 0.5m/s² What will be the new speed?

An acceptation of 0.5 m/s² means that every second the speed increases by 0.5 m/s. After 3 * seconds you gain in speed by 3 * 0.5 = 1.5 m/s So the final speed is 3.5 + 1.5 = 5 m/ s

Here is another method:

u =3.5m/s

Make use of

a = (v-u) / t

where:

a is acceleration in m/s² =0.5

v is final velocity in m/s = ?

u is initial velocity in m/s = 3.5

t is time in s = 3

Rewrite so it starts with v =....

a = (v)/t - (u) / t

v/t = u/t + a

multiply left and right of the = sign by t

v = u + a * t

Substitutie the known numbers

v = 3.5 + 0.5 * 3

final speed is (3.5 + 1.5) = 5 m/s

Answer:

cell

Explanation:

here are all the symbols-

hope this helps, take care and stay safe

Answer:

The centripetal force on body 2 is 8 times of the centripetal force in body 1.

Explanation:

Body 1 has a mass m, and its moving in a circle with a radius r at a speed v. The centripetal force acting on it is given by :

[tex]F=\dfrac{mv^2}{r}[/tex]

Body 2 has a mass 2m and its moving in a circle of radius 4r at a speed 4v. The centripetal force on body 2 is :

[tex]F'=\dfrac{2m\times (4v)^2}{4r}\\\\F'=\dfrac{2m\times 16v^2}{4r}\\\\F'=8\dfrac{mv^2}{r}\\\\F'=8F[/tex]

So, the centripetal force on body 2 is 8 times of the centripetal force in body 1.

Answer: The law of conservation of linear momentum helps to understand the behavior of a Newton's cradle In a closed system. This law is nothing more than action and reaction.it can be used to predict the resulting direction and speed of motion of objects after they collide.

Explanation: Just as an example, when you play pool/8ball, the white play exerts force on the other balls causing them to break away.

hope this helps.

Answer:

Michael Faraday

Explanation:

Electromagnetic Induction was first discovered way back in the 1830's by Micahel Faraday. Faraday noticed that when he moved a permanent magnet in and out of a coil or a single loop of wire it induced an ElectroMotive Force or emf, in other words a Voltage, and therefore a current was produced.

Answer:

the mental and physical activities carried out by using energy are generally termed as work

Answer:

Option C is correct.

The resistance of the TV = 68.6 ohms.

Explanation:

According to Ohm's law, the voltage across a device is equal to the product of the current through the device and the resistance across the device.

Since electrical appliances are setup in parallel connection, the voltage across the TV and the PlayStation is the same and is 120 V.

V = IR (From Ohm's law)

V = voltage across the TV = 120 V

I = current flowing through the TV = 1.75 A

R = Resistance of the TV = ?

120 = 1.75 × R

R = (120/1.75) = 68.57 ohms = 68.6 ohms.

Hope this Helps!!!

3m/s²

5m/s²

I hope it helps

Answer:

Compound-Complex sentence

Explanation:

compound-complex sentence is a type of sentence that is comprised of atleast two independent clauses also it is characterised by having one or more dependent clauses.

Among all types of sentences, compound-complex sentences are usually the most complicated as well as the longest. This is usually the point because it is made up of two sentence structures; compound and complex sentence structure.

An example of a compound complex sentence below;

Though Mike prefers watching high school films, he rented the latest spy thriller, and he enjoyed it very much.

Answer:

All the gravitational energy is converted mostly to the kinetic energy of the debris of the asteroid as they scatter everywhere. Also, some of it is converted to the sound energy of the impact that will be heard and heat energy.

A. The amount of water. 50/50