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Ksju [112]
3 years ago
15

What does reflection mean?

Chemistry
2 answers:
kenny6666 [7]3 years ago
7 0

Answer:

the throwing back by a body or surface of light, heat, or sound without absorbing it.

"the reflection of light"

Explanation:

i hope this helps

zhannawk [14.2K]3 years ago
7 0

Answer:

Reflection is like a mirror, you see yourself in the mirror thats your reflection, or you see yourself in a puddle. Basically a reflection just absorbed light.

Explanation:

Hope this helps. sorry if wrong. also change i up so ur teacher doesnt see that u copied it.

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if you administering an oral acetaminophen dose of 320.mg from a bottle of 32.0 mg/ ml, how many mililitters of the solution do
Yuri [45]
10 milliliters are needed
7 0
2 years ago
Density is considered what type of property
Taya2010 [7]
Density is a physical property. It's measured and doesn't change the object chemically.
4 0
3 years ago
What can occur in physical change ?
Alexandra [31]

Within a physical change, an element can change forms, such as going from solid to a liquid through melting. Color change can also occur during a physical change. Physical changes are very different from chemical changes. In a chemical change the element itself changes into something else within a reaction, such as combustion (burning).


Hope this helped

5 0
3 years ago
It has been suggested that the surface melting of ice plays a role in enabling speed skaters to achieve peak performance. Carry
Fittoniya [83]

Answer:

a) Pf = 689.4 bar

b) P = 226.6 bar

c) T = 269.99 K

Explanation:

a)

The molar volume of ice is equal to:

Vi = m/p = (18.02x10^-3 kg H2O/1 mol H2O)*(1 m^3/920 kg) = 1.96x10^-5 m^3 mol^-1

The molar volume of liquid water is equal to:

Vl = (18.02x10^-3 kg/1 mol)*(1 m^3/997 kg) = 1.8x10^-5 m^3 mol^-1

The change in volume is equal to:

ΔVchange = Vi-Vl = 1.96x10^-5 - 1.8x10^-5 = 1.5x10^-6 m^3 mol^-1

using the Clapeyron equation:

Pf = Pi + ((ΔHf*ΔT)/(ΔVf*Ti)) = 1.013x10^5 Pa + ((6010 J mol^-1 * 4.7 K)/(1.5x10^-6 * 273.15 K)) = 6.89x10^7 Pa = 689.4 bar

b)

For the pressure we will use the equation:

P = (m*g)/A, where m is the mass, g is the acceleration of gravity and A is the area. Replacing values:

P = (79 kg * 9.81 m s^-2)/(1.9x10^-4 m * 0.18 m) = 2.26x10^7 Pa = 226.6 bar

c)

From Clapeyron´s expression we need to clear ΔT:

ΔT = ((Pf-Pi)*ΔV*Ti)/ΔHf = ((2.26x10^7 - 6.89x10^7)*1.5x10^-6*273.15)/6010 = -3.16 K

you can evaluate the new melting point of ice:

T = Ti + ΔT = 273.15 K - 3.16 K = 269.99 K

4 0
3 years ago
If an atom has an atomic mass of 16 and it has 8 neutrons what is it's atomic number
Lana71 [14]
The atomic number is 8.
7 0
2 years ago
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