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4 years ago

How has technology helped to reduce the spread of infectious disease?

1 answer:

6 0

Technology is a wide spread human resource that many people use today, technology helps us cure fatal diseases or just the start of symptoms or getting sick. Technology has also helped us learn more about the world and what is
T was like before our time has come.

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. Where are gamma rays on the electromagnetic spectrum in terms of energy and frequency? Describe relative to other EM waves.

elena-14-01-66 [18.8K]

Explanation:

Gamma rays are the electromagnetic waves that have the highest frequency and the lowest wavelength compared to all other electromagnetic waves.

f = 300 EHz

$\lambda=1\ pm$

In terms of frequency the order of frequency is

Gamma rays > X rays > Ultraviolet > Visible > Infrared > high frequency > low frequency > Extremely low frequency

In terms of wavelength the order is the opposite of the frequency

Gamma rays < X rays < Ultraviolet < Visible < Infrared < high frequency < low frequency < Extremely low frequency

7 0

3 years ago

Beryllium forms a compound with chlorine that has the empirical formula becl2. the compound does not dissolve in water. how woul

nevsk [136]

To determine if the compound is an ionic compound, heat it up until the compound reaches its melting point and become molten. Use the molten form to set up an electric circuit and see if the compound will conduct electricity. If the compound conduct electricity then it is an ionic compound. If it does not conduct electricity, it is not an ionic compound. Ionic compounds usually conduct electricity in their molten forms.

3 0

4 years ago

In the laboratory a student determines the specific heat of a metal. He heats 19.5 grams of copper to 98.27 °C and then drops it

siniylev [52]

Answer:

The specific heat of copper is 0.37 J/g°C

Explanation:

Step 1: Data given

Mass of copper = 19.5 grams

Initial temperature of copper = 98.27 °C

Mass of water = 76.3 grams

Initial temperature of water = 24.05 °C

Final temperature of water and copper = 25.69 °C

Step 2: Calculate specific heat of copper

Qgained = -Qlost

Q = m*c*ΔT

Qwater = -Qcopper

m(water) * c(water) * ΔT(water) = - m(copper) * c(copper) *ΔT(copper)

⇒ with m(water) = 76.3 grams

⇒ with c(water) = 4.184 J/g°C

⇒ with ΔT(water) = T2-T1 = 25.69 - 24.05 = 1.64

⇒ with m(copper) = 19.5 grams

⇒ with c(copper) = TO BE DETERMINED

⇒ with ΔT(copper) = T2-T1 = 25.69 - 98.27 = -72.58

76.3 * 4.184 * 1.64 = - 19.5 * c(copper) * -72.58

523.552 = 1415.31 * c(copper)

c(copper) = 0.37 J/g°C

The specific heat of copper is 0.37 J/g°C

3 0

4 years ago

You have 200 g of a substance with a molar mass of 150 g/mol. How many moles of the substance do you have? 0.75 mol 1.00 mol 1.3

tigry1 [53]

Answer:

Explanation:

200 g/150 g/mol = 1.33 mol

7 0

3 years ago

Which describes the role of carbon dioxide in photosynthesis?

jeka57 [31]

Answer:

It is a reactant, so it enters the plant.

Explanation:

Hello,

Photosynthesis is the natural process occurring when plants produce sugar and oxygen by using the visible light as the catalyst to undergo the following chemical reaction:

$6CO_2+6H_2O-->C_6H_{12}O_6+6O_2$

In such a way, it is seen that the carbon dioxide has the role of reactant as it is used by the plant, that is, it enters the plant to allow the photosynthesis to be carried out.

Best regards.

6 0

3 years ago

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