Answer:
A wave
Explanation:
A wave is a disturbance that carries energy from one place to another. Matter is not carried with the wave but instead a wave can move through matter.
The answer is B. darker; cooler the dark spots give off less energy then the rest of the sun.
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Answer:
E = 29.7× 10⁻²⁰ j
Explanation:
Given data;
Frequency of light = 4.48 × 10¹⁴ Hz
Energy of photon = ?
Solution:
Formula:
E = h.f
E = energy of photon
h = planck's constant
f = frequency
E = h.f
E = 6.63 × 10⁻³⁴ Kg.m² /s × 4.48 × 10¹⁴ s⁻¹
E = 29.7× 10⁻²⁰ Kg.m²/s²
Kg.m²/s² = j
E = 29.7× 10⁻²⁰ j
Given data:
Concentration of stock solution which is the initial solution = M1 = 1.00 * 10^3 mg/L
Concentration of prepared solution i.e final solution = M2 = 6.250 mg/L
Volume of final solution, V2 = 5.000 * 10^2 ml
To determine:
The initial volume i.e. volume of the stock solution required = V1
Calculation:
Use the relation
M1V1 = M2V2
V1 = M2V2/M1 = 6.250 mg.L-1 * 5.000*10^2 ml/1.00 * 10^3 mg.L-1
V1 = 3.125 *10^3 ml
The volume of stock solution required is 3.125 *10^3 ml