Explain why background radiation is a mixture of contamination and irradiation

Answer:

V = d/t

V = 55m/1.75s

V = 31.43 m/s

Here are 3 alkali metals with physical and chemical similarity.

What is alkali metals?

Alkali metals are come from the fact that when these metals or their oxides dissolved in water.a basic solution results.

Three alkali metals -

1- hydrogen(H)

2-lithium(Li)

3-potassium(K)

Physical and chemical similarity of hydrogen -

-it is colourless and tasteless in nature.

-it is a combustible gas but not a supporter of combustion.

Physical and chemical similarity of lithium -

-it have a melting point of 180.54

-it is the lightest of all metals,with a density approximately half that of water.

Physical and chemical similarity of pottasium -

- this metal is soft and white with a silver lustre.

-it imparts a lavender colour to a flame, and it's vapour is green.

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Answer and Explanation: The geosphere interacts with the cryosphere when glaciers and sheets of ice from the cryosphere erode the rocks located on the geosphere. This happens as ice passes over the land and carries eroded rocks to new locations. The cryosphere can also cause soil to become icy and take hold of greenhouse gases from the atmosphere. The geosphere is the part of the Earth that has rocks, minerals, sand, and lava. The cryosphere has frozen water, ice, and glaciers. The cryosphere also interacts frequently with the hydrosphere because it draws water from the hydrosphere and freezes it during cold temperatures. Warmer temperatures cause the cryosphere to melt and release water back to the hydrosphere.

Answer:

It got transferred to kinetic energy

Explanation:

Answer:

The energy changed from kinetic energy to heat energy. Friction causes heating.

The length of an air column in a pipe closed at one end can be found by using the formula L = (n * λ) / 4, where n is the harmonic number and λ is the wavelength of the sound wave. In this case, the harmonic number is 1 since the pipe is closed at one end, and the frequency of the tuning fork is 264 Hz.

For a pipe closed at one end, only odd harmonics of the fundamental frequency can be produced. This means that the fundamental frequency of the pipe is given by f = v / (4L), where v is the speed of sound in air and L is the length of the pipe. Since the pipe is in resonance with the tuning fork, we have f = 264 Hz.

Substituting the values of f and v in the above equation, we get L = v / (4f) = (343 m/s) / (4 * 264 Hz) = 0.819 m. However, this value corresponds to the length of the air column for the fundamental frequency. Since the pipe is in resonance with the first harmonic of the tuning fork, the length of the air column is equal to one-fourth of the wavelength of the sound wave at that frequency. Therefore, we can find the wavelength of the sound wave as λ = v / f = 1.3 m, and the length of the air column as L = (n * λ) / 4 = 0.325 m, where n = 1.

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The barge floats 0.088 meters deeper.

To solve this problem, we need to use Archimedes' principle, which states that the buoyant force on an object in a fluid is equal to the weight of the fluid displaced by the object.

First, let's calculate the volume of the barge:

Volume = length x width x height
Height of the barge is not given, but we know that it floats in fresh water, which has a density of 1000 kg/m³. Therefore, the weight of the water displaced by the barge is equal to its weight (excluding the crate) and we can calculate the height using the formula:

Weight of barge (excluding crate) = weight of water displaced
density of water x volume of water displaced = density of barge x volume of barge

We know that the density of the barge is less than the density of water, otherwise it would sink. Let's assume that the barge is made of wood, which has a density of about 500 kg/m³. Then we can calculate the volume of water displaced by the barge:

Volume of water displaced = weight of barge (excluding crate) / density of water
Volume of water displaced = (4.8 m x 2.4 m x h) x 500 kg/m³ / 1000 kg/m³
Volume of water displaced = 5.76 h m³

where h is the height of the barge in meters.

Now let's add the weight of the crate to the barge. The total weight of the barge and the crate is:

Weight of barge and crate = weight of barge (excluding crate) + weight of crate
Weight of barge and crate = density of barge x volume of barge + 450 kg
Weight of barge and crate = 500 kg/m³ x (4.8 m x 2.4 m x h) + 450 kg
Weight of barge and crate = 5760 h + 450 kg

The weight of the water displaced by the barge and the crate is:

Weight of water displaced = density of water x volume of water displaced
Weight of water displaced = 1000 kg/m³ x (4.8 m x 2.4 m x h + V)

where V is the volume of the crate in cubic meters. We don't know the volume of the crate, but we can calculate it using its weight and the density of steel, which is about 7850 kg/m³:

Volume of crate = weight of crate / density of steel
Volume of crate = 450 kg / 7850 kg/m³
Volume of crate = 0.057 m³

Now we can set the buoyant force equal to the weight of the barge and the crate:

Weight of water displaced = Weight of barge and crate
1000 kg/m³ x (4.8 m x 2.4 m x h + 0.057 m³) = 5760 h + 450 kg
11.52 h + 0.057 = 5.76 h + 0.45
5.76 h = 0.507
h = 0.088 m

Therefore, the barge floats 0.088 meters deeper with the crate loaded onto it.

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Answer:

I prefer online because I get social anxiety and I have seizures and ptsd episodes, so I'd just much rather be online

Answer:

tie hair back

only burn the amount of chemicals as

directed by the lab procedure

Explanation:

The correct safety precautions for Amelia to take from the options would be to tie her hair back and to only burn the amount of chemicals recommended by the lab procedure.

With her hair left flowing freely, Amelia runs the risk of the hair catching flame while trying to burn the chemicals according to the procedure. Hence, tying her hair up into one neat bunch will limit the risk of it catching fire while working in the lab.

Also, burning less or more than the amount of chemicals recommended by the procedure may be dangerous or hinder Amelia from getting the right result.

Answer:

1,3

Explanation:

just did it

Take into account that any conversion factor can be written as a fraction in which you have the equivalence in the numerator and denominator.

b. 1 mile = 1.61 kilometer

By using the abbreviated form mi as mile and km as kiometer, you can write:

c. 4 cups = 1 quart

Answer:

Completion between two organism is when they fight over resources inadvertently causing the use and destruction of recourses making it more scares. if they don't adapt they die out.

Answer:Sample Response: In any ecosystem, the availability of resources is often limited due to competition. Competition results when two organisms require the same limited resource, such as food, water, shelter, or sunlight.

Explanation:

Go with this

The angular speed of the wheels is approximately 403.47 rad/min, and the wheels make approximately 387.68 revolutions per minute (rpm).

To find the angular speed of the wheels in rad/min, we need to convert the linear speed of the truck to angular speed. The linear speed of the truck is given as 55 mi/h. We know that the distance traveled on the circumference of a circle is equal to the product of the radius and the angle in radians subtended by the arc. In this case, the distance traveled on the circumference of the wheels is equal to the linear speed multiplied by the time taken.

We can calculate the radius of the wheels by dividing the diameter by 2, which gives us 15 inches. Converting the linear speed from miles per hour to inches per minute, we get (55 mi/h) * (5280 ft/mi) * (12 in/ft) / (60 min/h) ≈ 58080 in/min.

The angular speed is then obtained by dividing the linear speed by the radius of the wheels. So, the angular speed of the wheels in rad/min is approximately 58080 in/min / 15 in ≈ 3872 rad/min.

To find the number of revolutions per minute (rpm), we divide the angular speed by 2π, as one revolution is equal to 2π radians. Therefore, the wheels make approximately 3872 rad/min / (2π) ≈ 616.29 rpm.

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the answer is definitely A.

Answer:

D

Explanation:

Answer:

D

Explanation:

Light from other galaxies appears shifted toward the red end of

the spectrum, which shows that the galaxies are moving away

from Earth

According to the Skygazer's Almanac for 2022 at 40 degrees, Venus and Saturn will be in opposite parts of the sky on December 17, 2022.

The Skygazer's Almanac provides astronomical information for a specific location and year. In this case, at a latitude of 40 degrees, the almanac indicates that Venus and Saturn will be in opposite parts of the sky on December 17, 2022. This means that Venus and Saturn will appear at opposite sides of the celestial sphere as observed from Earth. However, it's important to note that the almanac's predictions are approximate and can be influenced by various factors, including atmospheric conditions and the observer's specific location. To obtain the most accurate and up-to-date information, it is recommended to consult more recent astronomical sources or use specialized software that can provide precise positions and dates for celestial events.

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The true velocity of the wind which is the resultant velocity of the wind is determined as 43.1 km/h.

The true velocity of the wind is the resultant velocity of the wind when it collides with the motor cyclist and it is calculated as follows;

R² = 50² + 60² - 2(50 x 60)cos(45)

R² = 1857.36

R = √1857.36

R = 43.1 km/h

Thus, the true velocity of the wind which is the resultant velocity of the wind is determined as 43.1 km/h.

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About 400.00 Meters per second.

(Think i may have gotten my decimal in the wrong place. If not then 4)

Answer:

14.40 km/h (kilometers per hour)

240.00 m/min (meters per minute)

Best answer: 4.00 m/s (meters per second)

Explanation:

Scientists  who won a Nobel Prize for pioneering work in the study of fiber optics is Charles Kuen Kao. Hence, option C is correct.

Fiber optics is the study of technologies that transmit information as light pulses along a plastic or glass fiber. Thin glass fibers or filaments have been used to view inside the body since the 1930s, but they have long been deemed unsuitable for transmitting information over long distances because too much light is wasted in the process.

Charles Kao offered a solution in the 1960s: highly pure glass fibers could convey enough light. His invention has made optical fiber telecommunication practicable when combined with laser technology.

Charles Kao won the Nobel price in physics in 2009 for the groundbreaking achievements concerning the transmission of light in fibers for optical communication.

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Answer:

temporary change, in which ice ❄ turns to water

Answer:

em waves do so because they require no medium to travel...space =vacuum)))

while sound waves that are longitudinal waves...require medium to travel......so in space it has vacuum.....it can't travel..

The diffraction pattern of the hair appears in the horizontal direction that it does because the diffraction pattern of the hair appears in the horizontal direction due to the bending and spreading of light waves around the hair.

1. When light encounters an obstacle, such as a hair, diffraction occurs. Diffraction is the bending and spreading of light waves around the obstacle.
2. The hair acts as a single slit, allowing light to pass through the narrow gap around it.
3. As the light waves pass through this gap, they interfere with each other, causing constructive and destructive interference.
4. This interference results in a diffraction pattern that appears in the horizontal direction, which is perpendicular to the direction of the hair.
5. The pattern is characterized by a series of bright and dark bands, with the bright bands representing areas of constructive interference and the dark bands representing areas of destructive interference.
In conclusion, the diffraction pattern of the hair appears in the horizontal direction due to the bending and spreading of light waves around the hair, which causes interference patterns to form perpendicular to the direction of the hair.

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Answer:

Impulse = Force × Time

Explanation:

Answer:

The Moment of Impact Quick Check

1. B. Impulse = Force × Time

2. A. The momentum of each ball changes, and the total momentum stays the same

3. D. -55 kg·m/s

4. B. 3.5 kg

5. C. 6.3 m/s

Explanation:

I got a 100. You're Welcome.