Which elements together make up seven percent of the earths crust? calcium and iron calcium and sodium potassium and magnesium potassium and sodium

Answer:

A teaspoon

Explanation:

As we know that the capacity of hold something by a standard teaspoon is related with milliliters as,

1 teaspoon is equivalent to 4.92892 milliliters

From this it can be see that the 1 teaspoon is equivalent to approximately 5 milliliters.

Therefore, the water hold by 1 teaspoon is more than the water hold by a milliliter.

Joe will take approximately 738.33 seconds to climb from street level to the roof of the Sears Tower.

To calculate the time it will take Joe to climb from street level to the roof of the Sears Tower, we can use the formula:

Time = Distance/Speed

Joe is climbing a distance of 443 m at an average speed of 0.60 m/s, so we can substitute these values into the formula:

Time = 443 m / 0.60 m/s = 738.33 s

Therefore, it will take Joe approximately 738.33 seconds to climb from street level to the roof of the Sears Tower.

Answer:

Two essential measurements to calculating average speed are distance and time.

There is a simple pattern for determining if a binary number is odd. This is when the number ends in 1. This pattern occured because they are defined by an odd word.

The binary number is a number that expressed in the base-2 numeral system or binary numeral system, that uses only two symbols, typically "0" and "1".

If the number ends in 1, it will be odd, whereas if the number ends in 0, it's even. Because the first digit can only be 0 or 1, the rest of the digits are multiplied by two.  To convert a binary number to base 2k, split it into groups of k digits by adding leading 0s if necessary, then convert each group to base 2k.

Example:

This pattern odd occured because they are defined by an odd word.They are numbers, that are by definition is too many things that they become odd, and also because they look odd again even when split into two

Grade:  9

Subject:  physics

Chapter:  Computer Science

Keywords: binary number, pattern, odd binary number, even binary number, Computer Science

Answer:

Mathematically, the acceleration of a body at any time is the second derivative of the position:

[tex]a=\frac{d^2x}{dt^2}[/tex]

In addition, it can be obtained by deriving the speed of the body:

[tex]a=\frac{dv}{dt}[/tex]

Explanation:

In classical mechanics acceleration is defined as the variation of speed with respect to time:

[tex]a=\frac{dv}{dt}[/tex]

In Newtonian mechanics, for a body with constant mass, the acceleration of the body measured by an inertial observer is proportional to the force acting on it:

[tex]F=ma\\\\a=\frac{F}{m}[/tex]

If 500 thousand BTUs of energy are available to raise the temperature of a water boiler from 20°F to 100°F, then the amount of water that can be added to the boiler is 750 gallons.

The subject of this question is physics, specifically the application of thermodynamics in heating water. Given that 1 BTU is the amount of energy needed to heat one pound of water by one degree Fahrenheit, first we need to convert the weight of water from gallons to pounds (since 1 gallon of water weighs about 8.34 pounds). Then, if we are to increase the temperature of the water from 20°F to 100°F, that's a 80°F difference. Hence, the energy required to heat one pound of water from 20°F to 100°F is 80 BTU.

So, if there are 500 thousand BTUs available, the amount of water (in pounds) that can be heated will be 500,000 BTUs divided by 80 BTU per pound, equating to 6250 pounds. Converting this weight back to gallons (since 1 pound of water is approximately 0.12 gallons), the amount of water that can be added to the boiler is 750 gallons.

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Using 500,000 BTUs of energy, you can raise the temperature of approximately 781.25 gallons of water from 20°F to 100°F, given the specific heat capacity of water and its density. This calculation is based on the energy required to heat each pound of water and converting that to gallons.

To determine how many gallons of water can be heated from 20°F to 100°F using 500,000 BTUs of energy, we need to use the specific heat capacity of water. The specific heat capacity of water is 1 BTU per pound per degree Fahrenheit.

First, calculate the total temperature change:

ΔT = 100°F - 20°F = 80°F

Next, we use the formula:

Energy = mass * specific heat capacity * ΔT

Rearrange to solve for mass (in pounds):

mass = Energy / (specific heat capacity * ΔT)

Insert the known values:

mass = 500,000 BTU / (1 BTU/lb/°F * 80°F) = 6,250 pounds

Since the density of water is approximately 8 pounds per gallon, convert the mass of water to gallons:

gallons = mass / density = 6,250 pounds / 8 pounds/gallon = 781.25 gallons

So, you can add approximately 781.25 gallons of water to the boiler.

Answer: 7.35 Joules

Explanation:

i got it right in my exam

For light or ultraviolet, the formula for energy can be calculated using Planck’s equation. That is:

E =  h c / ʎ

where,

h is the Planck’s constant = 6.626 * 10^-34 m^2 kg / s

c is the speed of light = 3 * 10^8 m/s

ʎ is the wavelength of light = 110 nm = 110 x 10^-9 m

So calculating for energy E:

E = (6.626 * 10^-34 m^2 kg / s) * (3 * 10^8 m/s) / (110 x 10^-9 m)

E = 1.807 x 10^-18 J

A car is traveling with constant velocity. this means that its position changes with time at constant rate at same direction.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.

Velocity informs us about the rate of change of your position, or how quickly your position changes per unit time. Velocity is described in physics as displacement divided by time, where displacement is the difference between your final and initial positions. Furthermore, an object is considered to be moving with constant velocity if it travels the same distance every second. This means that both the amount and direction of the velocity (or speed) stay constant.

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Coaxial cables offer a potential data transfer rate of 80 times quicker than twisted pair connections, which have a maximum of 10 Mbps. High-speed data transport occurs using optical fiber lines. About 69% of the speed of light is used to describe the transfer speed.

An assemblage of one or more wires running parallel to one another or bundled together that is used to transport electric current is known as an electrical cable.

A cable assembly, which is not always appropriate for connecting two devices but can be a partial product, can be made up of one or more electrical cables and the necessary connectors. A cable tree or cable harness are other examples of cable assemblies that can be utilized to link numerous terminals.

One or more optical fibers are used to carry data using fiber optic cables, also known as optical fiber cables, a type of Ethernet cable. As light pulses pass through small glass tubes, fiber optic cable transfers data. Twisted pair cable's transmission capacity is 26,000 times lower than optical fiber cable's transmission capacity.

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Final answer:

Fiber optic cables, twisted pair cables, and coaxial cables are different types of cables used in telecommunications. Fiber optic cables use light signals for data transmission, while twisted pair and coaxial cables use electrical signals. Each cable has its own advantages and is used for different purposes.

Explanation:

Fiber optic cables, twisted pair cables, and coaxial cables are all types of cables used for transmitting signals in telecommunications. Here are the differences:

Overall, the choice of cable depends on the specific application and requirements.

Final answer:

One water molecule is lost for every glycosidic bond formed in the polysaccharide chain, meaning for N monosaccharides joined, N-1 water molecules are lost.

Explanation:

Rule for Water Molecules Lost in Polysaccharide Formation;

During the formation of polysaccharides from monosaccharides, a dehydration reaction occurs. This means for every glycosidic bond formed, one water molecule is released. Therefore, a simple rule to determine the number of water molecules lost is as follows: for N monosaccharides joined to form a polysaccharide, the number of water molecules lost would be N-1. If two monosaccharides join to form a disaccharide, one water molecule is lost; if three join to form a trisaccharide, two are lost, and so on.

To illustrate, if you have 10 monosaccharides combining, you would lose 9 water molecules in the process, as 10-1=9. This reaction can be reversed through hydrolysis, where adding water can break the glycosidic bonds, converting the polysaccharide back into individual monosaccharides.

Answer:

Acceleration, [tex]a=-83.33\ m/s^2[/tex]

Explanation:

It is given that,

Initial speed of the satellite, u = 10000 m/s

Final speed of the satellite, v = 5000 m/s

Time taken, t = 1 min = 60 seconds

Acceleration of the satellite is given by :

[tex]a=\dfrac{v-u}{t}[/tex]

[tex]a=\dfrac{5000-10000}{60}[/tex]

[tex]a=-83.33\ m/s^2[/tex]

So, the acceleration of the pumpkin is [tex]-83.33\ m/s^2[/tex]. Hence, this is the required solution.

Final answer:

Work involves a force causing a displacement, and power is the rate at which work is done over time. The correct answer is A. work involves force and distance while power involves force and velocity.

Explanation:

Work and power are different concepts within physics. The difference between them is that work involves a force causing a displacement, while power is the rate at which work is done over time. Specifically, work done (W) is calculated as the product of force (F) and displacement (d) in the direction of the force: W = Fd. Power (P) is the rate at which this work is done, which is work divided by the time (t) it takes to do the work: P = W/t.

Therefore, the correct answer to the student's question is:

A. work involves force and distance while power involves force and velocity.

it is B.

Yes, the force applied is parallel to the direction of motion

Answer:

The answer is: "Yes, the force applied is parallel to the direction of motion" Hope this helps :)

Explanation:

Answer:

C is the answer

Answer: d. all of the above

Methane is a powerful greenhouse gas that contributes to the phenomena of global warming. One mole of methane is 10 times more powerful than one mole of CO₂. It is a dominant greenhouse gas. In Artic region the methane is released from the sea bed and the permafrost soil.  The methane is released as natural gas reserve from these sources as a outcome of the process of methanogeneisis. It involves the partial or uncomplete degradation of dead remains of animals and plants and rapid heating and thawing conditions.

The gas releases in the atmosphere because of all the four options.

A SULFATE  IS THE CORRECT ANSWER

In Carl's experiment, the independent variable is the depth of the lake, which is being manipulated. The dependent variable is the temperature of the water, which may change based on the depth of measurement.

In this lake temperature measurement experiment, the independent variable is the depth of the lake. This is because Carl is manipulating or changing the depth where he is taking water temperature measurements. The dependent variable, on the other hand, is the temperature of the water. The temperature is dependent because its value can possibly change based on the depth of the lake where the temperature measurement is taken.

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