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3 years ago

. A falling object in the air possess______ *

Chemistry

1 answer:

atroni [7]3 years ago

7 0

Answer:

The answer is B

B) gravitational potential energy only

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Given 16.2 grams of substance Y, if the substance absorbs 2722 joules of energy and the specific heat of the substance is 9.22 J

snow_tiger [21]

Since the substance absorbs heat, it is expected that the temperature will rise. The formula for the internal energy of a substance is given by the equation:

ΔU = mCpΔT

where:

ΔU = internal energy
m = mass of substance
Cp = specific heat capacity of substance
ΔT = change in temperature

ΔU = 2722 Joules = 16.2 grams (9.22 J/g-°C) (Tf - 26°C)

This gives a final temperature of Tf = 44.22 °C

4 0

3 years ago

Describe how phospholipids form a barrier between water inside the cell and water outside the cell.

marusya05 [52]

The head of the phospholipids molecule is attracted to water, the tail repels water

3 0

3 years ago

Read 2 more answers

When a compound containing cesium ions is heated in a Bunsen burner flame, photons with an energy of 4.30 x 10-19 J are emitted.

inessss [21]

<u>Answer:</u> The wavelength of the flame is 462 nm and color of cesium flame is blue.

<u>Explanation:</u>

To calculate the wavelength, we use Planck's equation, which is:

$E=\frac{hc}{\lambda}$

where,

E = Energy of 1 photon = $4.30\times 10^{-19}J$

h = Planck's constant = $6.625\times 10^{-34}J.s$

c = speed of light = $3\times 10^8m/s$

$\lambda$ = wavelength = ?

Putting values in above equation, we get:

$4.30\times 10^{-19}=\frac{6.625\times 10^{-34}J.s\times 3\times 10^8m/s}{\lambda }\\\\\lambda=\frac{6.625\times 10^{-34}J.s\times 3\times 10^8m/s}{4.30\times 10^{-19}}=4.62\times 10^{-7}m=462nm$

The range of wavelength of blue light lies in range of 500 nm - 435 nm

The calculated wavelength lies in the above range. So, the color of the cesium flame is 462 nm

Hence, the wavelength of the flame is 462 nm and color of cesium flame is blue.

6 0

3 years ago

A solution of 49.5% H₂SO₄ by mass has a density of 1.39 g/cm³ at 293 K. A 26.0 cm³ sample of this solution is mixed with enough

likoan [24]

I believe the answer would be 1.74 M

7 0

3 years ago

What chemicals has 7 h 2 c and 1 n

inn [45]

Explanation:

Dimethylamine

Dimethylamine is a colorless liquid or gas with a fishy or Ammonia-like odor. It is used as a solvent and in making rubber, textiles, drugs, and other chemicals.

8 0

3 years ago