a satellite of mass 180 kg is placed into earth orbit at a height of 150 km above the surface. (a) assuming a circular orbit, how long does the satellite take to complete one orbit? h (b) what is the satellite's speed? m/s (c) starting from the satellite on the earth's surface at the equator, what is the minimum energy input necessary to place this satellite in orbit? ignore air resistance but include the effect of the planet's daily rotation. j

Answer: the answer is 50

Explanation:

Wind speeds of above 56 kilometers per hour (35 miles per hour) are common during blizzards. These winds reduce visibility by causing a lot of snow to blow around in the air and close to the ground.

To learn more about Blizzards refer to:

https://brainly.com/question/18091660

#SPJ1

The correct answer is (c) to recrystallize strain-hardened metals. Annealing is a heat treatment process performed on metals to relieve internal stresses and recrystallize the material.

It is commonly used to restore the ductility and toughness of a metal after it has undergone plastic deformation or strain hardening. During plastic deformation processes like rolling, forging, or cold working, metals can become hardened and develop internal stresses. This can result in decreased ductility, increased hardness, and reduced workability. Annealing involves heating the metal to a specific temperature and holding it there for a certain period of time, followed by controlled cooling. This process allows the metal's internal structure to undergo recrystallization, where new, strain-free grains form and replace the deformed structure.

learn more about metals here:

https://brainly.com/question/15723396

#SPJ11

Answer:

Newtons

Explanation:

Its units are newtons because force has both magnitude and direction.

The true direction of the jet is approximately 4.8 degrees north of east.

To determine the true direction of the jet, we need to calculate the resultant velocity vector. We can start by representing the velocity of the jet and the wind as vectors using the i and j components.
The velocity vector of the jet is 475i (since it is heading due east) and the velocity vector of the wind is 40j (since it is blowing due north).
To find the resultant vector, we can add these two vectors using vector addition.
Resultant velocity vector = 475i + 40j
To find the direction of this vector, we need to use trigonometry. We can calculate the angle that this vector makes with the east using the arctangent function.
Angle = arctan(40/475)
Angle ≈ 4.8 degrees north of east

To learn more about velocity click here https://brainly.com/question/17127206

#SPJ11

charge conservation, in physics, constancy of the total electric charge in the universe or in any specific chemical or nuclear reaction. The total charge in any closed system never changes, at least within the limits of the most precise observation. In classical terms, this law implies that the appearance of a given amount of positive charge in one part of a system is always accompanied by the appearance of an equal amount of negative charge somewhere else in the system; for example, when a plastic ruler is rubbed with a cloth, it becomes negatively charged and the cloth becomes positively charged by an equal amount.

The Answer is B because primary consumers need to get their food from plants.

Answer:

The Answer is B because primary consumers need to get their food from plants

Explanation:

When a basketball player makes a jump shot, the ball goes through the net. The given information is as follows: Mass of the ball, m = 0.590 kgInitial height of the ball, h = 1.90 mInitial velocity of the ball, u = 7.04 m/sFinal height of the ball, h’ = 3.02 mFinal velocity of the ball, v = 4.28 m/sForce acting on the ball by air resistance is a nonconservative force.

According to the law of conservation of energy, energy can neither be created nor destroyed, but it can be transformed from one form to another. The ball has gravitational potential energy at the initial height and kinetic energy when it reaches the net.

The energy lost due to nonconservative forces such as air resistance is transformed into other forms of energy such as thermal energy. The work done by nonconservative forces is defined as the difference in mechanical energy from the beginning of the path to the end of the path. In other words, the work done by air resistance is equal to the difference between the mechanical energies at the beginning and at the end of the path.

To know more about jump visit:

https://brainly.com/question/11874611

#SPJ11

The speed of the wind is 17 mph and the speed of the plane in still air is 119 mph.

Let the speed of the plane be x and the speed of the wind be y. Then, the speed of the plane with the wind becomes x + y, while the speed of the plane against the wind is x - y.

The distance traveled with the wind in 3 hours is 408 miles.

Therefore, we can write the equation as:

3(x + y) = 408

Divide both sides by 3:

x + y = 136  .... (1)

The distance traveled against the wind in 4 hours is also 408 miles.

Therefore, the equation can be written as:

4(x - y) = 408

Divide both sides by 4:

x - y = 102  .... (2)

Now we can solve these two equations using the elimination method.

Add equations (1) and (2):

x + y + x - y = 136 + 1022x = 238x = 119 mph

Therefore, the speed of the plane in still air is 119 mph.

Now, substitute this value of x in equation (1):

119 + y = 136y = 17 mph

Therefore, the speed of the wind is 17 mph.

Learn more about the speed at https://brainly.com/question/13943409

#SPJ11

The correct question is:

A plane flies 408 mi with the wind in 3 hr. The return trip takes 4 hr. What is the speed of the wind and the speed of the plane in still air?

Answer:

The length of the third side is

     \(c =8.82 \  m \)

The tangent of the angle for which 6.9 m is the opposite side is

\(k = 1.256\)

Explanation:

From the question we are told that

The first side is a = 6.9 m

The second side is b = 5.5 m

Generally apply Pythagoras theorem

\(c^2 = a^2 + b^2\)

=> \(c = \sqrt{a^2 + b^2 }\)

=> \(c = \sqrt{6.9^2 + 5.5^2 }\)

=> \(c =8.82 \ m \)

From sin rule we have that

\(\frac{c}{sin(\theta )} = \frac{a}{sin (\beta )}\)

Generally from a right triangle the angle \(\theta = 90\)

So

\(\frac{8.82}{sin(90 )} = \frac{6.9}{sin (\beta )}\)

=> \(\beta = sin ^{-1}[\frac{6.9}{8.82} ]\)

=> \(\beta =51.47^o\)

Generally the tangent of the angle for which 6.9 m is the opposite side is mathematically represented as

\(k = tan (\beta )\)

       \(k  =  tan (51.47 )\)

       \(k  = 1.256\)

The focal length (f) of the corrective lens should be 8 cm.

The term nearsightedness, or myopia, refers to a condition where a person can see nearby objects clearly, but distant objects appear blurry. This occurs because the lens of a nearsighted person focuses light in front of the retina instead of on it. On the other hand, farsightedness, or hyperopia, refers to a condition where a person has difficulty seeing nearby objects because the lens focuses light behind the retina.

To solve the given problems:

Problem 1:

For a nearsighted person, the image of an object at infinity is formed 2 cm behind their eye's lens. However, the problem states that the image falls 0.5 cm short of their retina. We need to find the focal length (f) of a corrective lens that makes the image appear perfectly 2.5 cm behind the lens.

The distance from the lens to the retina is 2.5 cm. The distance from the lens to the image is 2 cm, but we want it to be 2.5 cm behind the lens, so we add 0.5 cm. Therefore, the distance from the lens to the object is 2.5 + 2 = 4.5 cm.

Using the lens equation, 1/f = 1/do + 1/di, where f is the focal length, do is the distance from the lens to the object, and di is the distance from the lens to the image, we can rearrange and substitute the values:

1/f = 1/4.5 - 1/2.5

f = -6.43 cm

Hence, the focal length (f) of the corrective lens should be -6.43 cm.

Problem 2:

In this problem, we have a similar scenario as the previous one, but for a farsighted person. The uncorrected image forms 0.5 cm behind their retina, and we need to find the focal length (f) of a corrective lens that makes the image form perfectly on the retina, 2.5 cm behind the lens.

For a farsighted person, the uncorrected image forms behind the retina. We want the image to form on the retina. Therefore, the distance from the lens to the image is 2.5 cm, and the distance from the lens to the retina is 2.5 cm - 0.5 cm = 2 cm.

Using the lens equation, 1/f = 1/do + 1/di, where f is the focal length, do is the distance from the lens to the object, and di is the distance from the lens to the image, we can rearrange and substitute the values:

1/f = 1/oo - 1/2

f = 8 cm

Learn more about  focal length

https://brainly.com/question/2194024

#SPJ11

When a refrigeration system that produces low or no cooling has low suction pressure, high head pressure, and high evaporator pressure, it probably an undercharge of refrigerant. Correct answer: letter D.

An undercharge of refrigerant in a refrigeration system is one of the most common causes of low or no cooling. When refrigerant is undercharged, the system is unable to produce the necessary cooling effect, resulting in:

Additionally, an undercharge of refrigerant can be caused by a leak in the system or by improper charging during installation.

When a refrigeration system producing low to normal refrigeration operates continuously without stopping and has  high suction pressure and high head pressure, the probable cause is ______.  

a.  An inefficient compressor.

b.  A low-side restriction.

c.  Noncondensables trapped in the condenser.

d.  An undercharge of refrigerant.

Learn more about undercharge of refrigerant:

https://brainly.com/question/14255586

#SPJ4

I'm not sure what you were trying to put here

The sign of q, or the heat transfer, for the process of compressing the air in a bicycle pump, is positive. This means that heat is being transferred into the system, in this case, the air in the pump.

When a gas is compressed, the molecules collide more frequently and with greater force, which increases the temperature of the gas. This increase in temperature is due to the transfer of heat from the surroundings (in this case, the body of the pump) into the gas.

The sign of q can be determined using the first law of thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system.

If heat is added to the system, q is positive, and if heat is removed from the system, q is negative. In the case of compressing the air in a bicycle pump, the internal energy of the system (the air in the pump) increases, which means that q is positive.

Learn more about the air at

https://brainly.com/question/17551490?referrer=searchResults

#SPJ4

The question is -

You may have noticed that when you compress the air in a bicycle pump, the body of the pump gets warmer. What is the sign of q for this process?

The amount of energy (in joules) required to warm 4.37 g of silver by ΔT degrees Celsius can be calculated using the equation Q = 1.0488 * ΔT.

The specific heat capacity (C) of a substance is the amount of energy required to raise the temperature of 1 gram of that substance by 1 degree Celsius. In this case, the specific heat capacity of silver is 0.24 J/g°C.

To calculate the energy required to warm 4.37 g of silver, we need to multiply the mass (m) by the specific heat capacity (C) and the change in temperature (ΔT). The change in temperature is not provided in the question, so we'll assume it is given.

Let's assume the change in temperature is ΔT°C. The formula to calculate the energy (Q) is:

Q = m * C * ΔT

Substituting the given values:

Q = 4.37 g * 0.24 J/g°C * ΔT

The units of grams cancel out, and we are left with:

Q = 1.0488 J/°C * ΔT

So, the amount of energy (in joules) required to warm 4.37 g of silver by ΔT degrees Celsius can be calculated using the equation Q = 1.0488 * ΔT.

learn more about specific heat capacity Refer: https://brainly.com/question/1105305

#SPJ11

Answer:

true

Explanation:

Answer:its true i think im sorry if you get wrong

Explanation:

Electromagnetic Wave - oscillating electric charge

Radar - tracking storms

c            - Velocity of light

Photon - behaves as a particle

infrared waves - TV remote control

Frequency - Wavelength

ultraviolet waves - sun burn

Microwaves - Cooking Food

CRT - Television

pager - unique identification number

moving electric field - moving magnetic field

carrier wave - frequency modulation

In physics, electromagnetic radiation (EMR) is made up of electromagnetic (EM) field waves that travel across space carrying velocity and electromagnetic radiant energy. Radio waves, microwaves, infrared, (visible) light, ultraviolet, X-rays, and gamma rays are all examples of electromagnetic radiation.

To know more about microwave :

https://brainly.com/question/15708046

#SPJ1.

The process of science followed my initial ideas e because it  involved experiments.

The process of science or the scientific method refers to the process which scientists follow in their discovery and explanation of natural phenomena.

The scientific method is given below:

The process of science follows my initial ideas about the process of science because I always thought science involved experiments.

In conclusion, the process of science involves making hypothesis and conducting research.

Learn more about process of science at: https://brainly.com/question/17216882

#SPJ1

James Watt devised the unit of power called the horsepower

Answer:

A lightbulb has 25 W stamped on it. What does this mean?:

These labels mean that each lightbulb has Its respective power delivered to It when It Is connected to a constant

Explanation:

Answer:

The initial velocity of the pooper off the table is approximately 9.264 m/s

Explanation:

The mass of the popper, m = 0.1 kg

The height the popper reaches, h = 2.0 meters

The initial velocity of the popper, 'u', is given by the following kinematic relation;

v² = u² - 2·g·h

Where;

h = The height the popper reaches = 2.0 m

v = The final velocity of the popper at the height it reached = 0 m/s

u = The initial velocity of the pooper off the table

g = The acceleration du to gravity, g ≈ 9.81 m/s²

Plugging in the values gives;

0² = u² - 2 × 9.81 × 2.0

∴ u - √(2 × 9.81 × 2.0) ≈ 9.264

The initial velocity of the pooper off the table, u ≈ 9.264 m/s.

Answer:

X: Absorbs energy from the core.

Y: Releases energy to the photosphere.

Explanation:

Convection is a mode of heat transfer through fluids (liquids or gas), and it requires material medium for its propagation.

The energy absorbed from the core of the Sun, is transferred through X (convection zone) by convectional process, and it flows to Y (radiative zone). Since the regions X and Y have different functions, the heat propagates from X causing photons to traverse through Y where it get released into the photosphere or the Sun's surface.

Therefore;

X: Absorbs energy from the core.

Y: Releases energy to the photosphere.

Answer:

X: Takes longer for photons to move through

Y: Releases energy to the photosphere

Explanation:

A 1Msun star in a closed binary system with a 2Msun star.

Systems in which the two stars are close to each other are called close binary star system.

The most massive stars have the shortest lifespans. The reason is that they have most fuel, they burn it so enormously that their lifetimes are very short. As a 1Msun star in a closed binary system with a 2Msun star becomes the massive star so it has the shortest life expectancy.

a. No, an isolated 1Msun star has not the shortest life expectancy.

b. No, a 1Msun star in a closed binary system with a 0.8Msun star has not the shortest life expectancy.

c. Yes, A 1Msun star in a closed binary system with a 2Msun star has the shortest life expectancy.

Learn more about star from:

https://brainly.com/question/21521087

#SPJ4

Crane 1 uses 10 kj of energy to lift a 50 kg box to the roof of the building. Crane 2 uses 20 kj to life a 100 kg box the same distance. Which crane is more efficient both use the same efficiency. Hence option C is correct.

In physics, energy (from the Ancient Greek v (enérgeia) 'activity') is a quantitative attribute that is imparted to a body or a physical system and is visible in the execution of work as well as in the form of heat and light. The law of conservation of energy holds that energy can be transformed in form but cannot be generated or destroyed. The joule (J) is the International System of Units (SI) unit of measurement for energy. Work is force times distance.

Given,

for crane 1,

Energy E = 10 kJ

mass = 50 kg

For Crane, 2

Energy E = 20 kJ

mass m = 100 kg

Suppose the distance is  10 m

Crane 1,

Output energy - Fs

Output energy = 50×9.8×10

Output energy = 4900 J

efficiency of crane 1 is 4900/10000 × 100 = 49 %

Crane 2-,

Output energy - Fs

Output energy = 100×9.8×10

Output energy = 9800 J

efficiency of crane 1 is 9800/20000 × 100 = 49 %

Both canes have same efficiency,

Hence option C is correct.

To know more about efficiency :

https://brainly.com/question/30861596

#SPJ4.

Heat energy is also called thermal energy.

Understanding what a black hole is holds immense importance in unraveling the mysteries of the universe. A black hole can be defined as a region in space where gravity is so strong that nothing, not even light, can escape its gravitational pull.

Black hole is a region in space with a very strong gravitational field, which makes it difficult for anything, even light, to escape. It is essential for us to understand what a black hole is, as it is a fascinating concept that scientists have been researching for decades.

There are numerous reasons why it is important to understand black holes. Here are some of the reasons why:

1. It can assist us in comprehending the universe:Black holes can tell us a lot about the universe's origins, as well as how it functions. By studying black holes, we can learn more about how galaxies form and evolve, as well as the fundamental properties of the universe.

2. To learn more about physics:We can learn a lot about physics by examining black holes. For example, we can learn more about the properties of gravity and the behavior of matter under intense conditions by examining black holes.

3. To detect gravitational waves:The detection of gravitational waves is one of the most significant recent achievements in physics. By learning more about black holes, scientists can improve their ability to detect gravitational waves, which can provide important information about the universe.

4. For Space exploration:If humanity intends to travel beyond our solar system, we will need to learn how to navigate black holes. By studying black holes, we can learn more about the properties of space-time, which will be essential for future space exploration.

5. For developing new technologies:Scientific studies frequently lead to technological advancements. By studying black holes, scientists can learn about new technologies that may have a variety of applications, including space exploration and energy production.

Know more about  gravitational waves   here:

https://brainly.com/question/32321933

#SPJ8

Answer:

(B)

Explanation:

Because what ever angle the surface is, the light will reflect of of it perpendicular.