

Explanation:
We see any object because of reflection of light. When light, strikes a body, get reflected and received by human eye, the image formed in retina is what brain process and tells you that there is an object there.
D
Boiling and melting are both physical changes so do not involve the formation or breakage of chemical bonds.
Answer:
6.11 J/g°C
Explanation:
We need to use the heat equation: q = mCΔT, where q is the amount of heat required in Joules, m is the mass in grams, C is the heat capacity, and ΔT is the change in temperature.
Here, we know q = 23,200 Joules, m = 28 grams, and the ΔT is just the difference of the temperatures: 150 - 14.4 = 135.6°C. Substitute these values to find C:
q = mCΔT
23,200 = 28 * C * 135.6
C = 6.11
Thus, the specific heat is 6.11 J/g°C.
Answer:
Wavelength of electromagnetic wave = 4.0 × 10³
Explanation:
Given:
Wavelength of electromagnetic wave = 4000 meter
Find:
Write, Wavelength of electromagnetic wave into scientific notation
Computation:
Wavelength of electromagnetic wave = 4000 meter
Wavelength of electromagnetic wave = 4.0 × 1,000 meter
Wavelength of electromagnetic wave = 4.0 × 10³
So,
Option "B" is the correct answer to the following question.
Explanation:
sodium element with 11 electrons,11protons and 12 neutrons