Explain what causes a satellite to stay in orbit and what happens to gravity at large heights​

The approximate centripetal force on an astronaut of mass 80Kg if the centrifuge rotates once every 2s is 3.94 KN

ac = v² / r

v = 2 π r / T

ac = Centripetal acceleration

v = Linear / Tangential velocity

T = Time period

r = Radius

r = 5 m

T = 2 s

v = 2 * 3.14 * 5 / 2

v = 15.7 m / s

ac = 15.7 * 15.7 / 5

ac = 49.298 m / s²

Fc = m ac

m = Mass

m = 80 kg

Fc = 80 * 49.298

Fc = 3943.8 N

Fc = 3.94 KN

Therefore, the approximate centripetal force on the astronaut is 3.94 KN

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Answer:

-76.44 J

Explanation:

The force due to gravity is conservative, it means that no matter the path, the work done from A to B will be always the same and it depends on the vertical distance between A and B which in this case is 2.0 m.

So, the work done by the gravity is

W = Fdcosθ

Where the force is the weight so, F = mg = (3.9 kg)(9.8 m/s²) = 38.22 N

d is the vertical distance, so , d = 2.0 m

And θ is the angle between the displacement and the weight, so, θ = 180

Then,

W = (38.22N)(2.0 m)cos(180)

W = -76.44 J

Therefore, the work done by gravity along paths 1, 2, and 3 was -76.44 J

The SI unit is agreed internationally through an agreement known as convention of the meter.

SI unit stands for International System Of Units (SI) - which is the metric system that is used universally as a standard for measurements.

The SI unit is agreed internationally through an agreement known as convention of the meter, which describes the measurement of fundamental quantities such as mass, time, and length.

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Answer:

C, water vapor is less dense than liquid water

Explanation:

Answer:

C water vapor is less dense than liquid water.

Answer:

Acceleration

Explanation:

The most appropriate method to study the potential impacts of oil drilling on coastal California would be design a computer simulation of an oil spill in the area to determine the environmental impact design a computer simulation of an oil spill in the area to determine the environmental impact. The correct option to this question is C.

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The height the two balls will collide at 5.1 m above the ground after travelling for 1 second

Let's assume that the upward direction is positive, and the downward direction is negative. We can use the kinematic equations of motion to solve the problem.

For the ball that is dropped, we can use the equation:

y = y₀ + v₀t + 1/2 at²

Where:

Therefore, the equation becomes:

y = 10 + 0t - 1/2 (9.8)t²

For the ball that is thrown upward, we can use the equation:

y = y₀ + v₀t + 1/2 at²

where:

Therefore, the equation becomes:

y = 0 + 10t - 1/2 (9.8) t²

Since both balls will collide at the same height, we can equate the two equations to solve for t and y.

10 - 1/2 (9.8) t² = 10t - 1/2 (9.8) t²

Simplifying the equation, we get:

10t = 10

t = 1 second

Substituting t = 1 second into either equation, we get:

y = 10 * (1) - 1/2 (9.8) * (1)²

y = 5.1 meters

Therefore, the two balls will collide at a height of 5.1 meters above the ground.

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The Kinetic energy possessed by the cycle with a mass of 100 kg and velocity 40 m/s is 80 kJ.

Kinetic energy is the energy of an object when the object is in motion. It is obtained by the product of the mass of the object and the velocity of the object. The unit of kinetic energy is the joule (J).

From the given,

mass of the motorcycle (m) = 100 kg

velocity (v) = 40 m/s

K.E =?

K.E = (mv²) / 2

     = (100×40×40) / 2

    = 160,000 / 2

   = 80,000 J

Thus, the kinetic energy of the motorcycle is 80kJ.

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Answer:

D. It must have mass and volume

Explanation:

In science, matter is referred to as any substance that has weight and occupies space. This means that the substance must have a MASS of its own when weighed and also a VOLUME.

Matter include elements, molecules, humans, etc. In fact, almost every substance on Earth is considered MATTER. Therefore, the fact that a substance must "have mass and volume" is true for all matter.

Videos can be streamed from the cloud to a computer with no loss in quality because Digital signals are used to transmit data to and from the cloud.

How do digital signals work?

An established or one that represents data as a step made up of discrete values is known as a digital signal. There is no noise produced by digital signals. Electronic signals sent as pulses are used to transmit digital signals to computers. These signals can be found in things like digital phones and computers.

Because digital signals are used to transport data to and from the cloud, it should be noted that videos are said to stream from the cloud to a computer without quality degradation.

Videos can be streamed from the cloud to a computer with no loss in quality because Digital signals are used to transmit data to and from the cloud.

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Answer:

Unbalanced

Explanation:

Answer:

c. The incident light must have at least as much energy as the electron work function

Explanation:

In photoelectric effect, electrons are emitted from a metal surface when a light ray or photon strikes it. An electron either absorbs one whole photon or it absorbs none. After absorbing a photon, an electron either leaves the surface of metal or dissipate its energy within the metal in such a short time  interval that it has almost no chance to absorb a second photon. An increase in intensity of light source  simply increase the number of photons and thus, the number of electrons, but the energy of electron  remains same. However, increase in frequency of light increases the energy of photons and hence, the

energy of electrons too.

Therefore, the energy of photon decides whether the electron shall be emitted or not. The minimum energy required to eject an electron from the metal surface, i.e. to overcome the  binding force of the nucleus is called ‘Work Function’

Hence, the correct option is:

c. The incident light must have at least as much energy as the electron work function

Answer:

As in chemical formula? It's CH4.

Answer:

Because psychology helps you understand the mind of someone else. It can teach you about traits people may have based on what you see, or a likely personality of someone based on their history, and so many other things. Psychology helps you understand a whole other person, and understanding people is a big part in many things such as medicine, STEM, nursing, teaching, and many other things. Understanding people and the things around you is a necessary skill.

The area of Mrs. Turner's apartment is approximately 0.05304 square feet.

To find the area of Mrs. Turner's apartment, we need to convert the measurements from the scale drawing to the actual measurements in feet, using the given scale factor of 1 inch/18 feet.

Length of apartment in feet = 6.25 inches × (1 foot/18 inches) = 0.34722 feet

Width of apartment in feet = 2.75 inches × (1 foot/18 inches) = 0.15278 feet

Now, we can calculate the area of the apartment in square feet by multiplying the length and width:

Area of apartment in square feet = Length × Width = 0.34722 feet × 0.15278 feet = 0.05304 square feet

Therefore, the area of Mrs. Turner's apartment is approximately 0.05304 square feet.

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The changes that would increase the total energy of a system is an addition of 500 J of kinetic energy and a loss of 450 J of thermal energy.

The term conservation of energy means that energy can not be created nor destroyed.

In this case, the changes that would increase the total energy of a system is an addition of 500 J of kinetic energy and a loss of 450 J of thermal energy.

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Answer:

Endurance, or aerobic

Strength, or resistance training

Balance

Flexibility

Explanation:

Answer:

Walking. Walking is simple, yet powerful. It can help you stay trim, improve cholesterol levels, strengthen bones, keep blood pressure in check, lift your mood, and lower your risk for a number of diseases (diabetes and heart disease, for example).

The distance of the image formed by the lens is at 10.7 cm on the ruler.

option C.

The distance of the image is calculated by applying lens formula as shown below;

1/f = -1/u + 1/v'

where;

From the diagram, the focal length of the lens = 8.5 cm

the object distance = 3 cm

The image distance is calculated as follows;

1/v' = 1/f + 1/u

1/v' = 1/8.5 + 1/3

1/v' = 0.45

v' = 1/0.45

v' = 2.21 cm

The position of the image on the rule is calculated as follows;

v = v'  +  8.5 cm

v = 2.21 cm + 8.5 cm

v = 10.71 cm

Thus, the ray - diagram shows the position or distance of the image formed.

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The statement best describes the primary difference between scientific investigation and technological design is Scientific investigation involves experiments, and technological design involves products. Option D

It can be said that both scientific investigation and technolgical design require problem-solving, creativity, and rigorous methods.

However, both of them have different objectives. While Scientific investigation seeks to expand knowledge and understanding of the natural world. Research involvs hypothesis testing and different experiments;

on the other hand, Technological design, wants to create or improve products, processes, or systems to meet specific needs or solve particular problems.

It can then be defined as the application of scientific knowledge for practical purposes.

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The total work done on the ball by the soccer player is 50,200 J.

The work done by the applied force is the product of the applied of the applied force and the displacement of the object.

The work done on the ball is calculated as follows;

W = Fd

W = 1000 x (0.2 + 50)

W = 50,200 J

Thus, the total work done on the ball by the soccer player is 50,200 J.

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It is not a good idea to drink hot cocoa out of a tin cup since metal is a good conductor of heat and the hot cocoa's high temperature will cause the metal cup to quickly transfer heat to your hand and mouth, perhaps resulting in burns or pain.

When particles of warmer matter collide with particles of cooler matter, some of the thermal energy from the warmer particles is transferred to the cooler particles. Certain solids and liquids typically conduct electricity more quickly than gases do.

Conduction is the mechanism by which the hot chocolate transmits heat to the mug. As the molecules of the hot chocolate clash with those of the mug, energy is transferred to both of them as well as to the surrounding air.

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Speed of second car  will be 15.35 m/s

The Doppler effect is the apparent change in frequency of a wave when the observer and the source of the wave move relative to each other.

f0= observed frequency = 1920 Hz

v = speed of source = 343 m/s

v0 = speed of observer = ?

fs = frequency of source = 2010 Hz

from Doppler effect

f0 = (v -v0 / v) * fs

1920 / 2010 = (343 - v0)/ 343

(192/ 201) * 343 = 343 - v0

v0 = (343 * 9) / 201 = 15.35 m/s

Speed of second car  will be 15.35 m/s

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Answer:

 U = 4 U₀

we see that the gecko must use 4 times more energy to double the force

Explanation:

For this exercise they indicate that we can approximate the situation to a charged capacitor, so the stored energy is

            U = Q² / 2C

where C is the capacitance that does not change since it is the same gecko and Q is the stored charge.  In the initial state

          U₀ = Q₀² /2C

They tell us that the load is doubled

         Q = 2Q₀

where Qo is the initial charge; the new energy is

         U = (2Q₀)² / 2C

         U = 4 Q₀² / 2C

         U = 4 U₀

where U₀ is the initial energy

Therefore we see that the gecko must use 4 times more energy to double the force

Answer: a . it decreases

Explanation: