Answer:
Explanation:
The energy of a photon is given by:
where
is the Planck constant
is the frequency of the photon
Substituting the numbers into the equation, we find:
Answer:
e = 0.0898m
v = 2.07m/s
Explanation:
a) According to Hooke's law
F = ke
e is the extension
k is the spring constant
Since F = mg
mg = ke
e = mg/k
Substitute the given value
e = 1.1(9.8)/120
e = 10.78/120
e = 0.0898m
Hence it is stretched by 0.0898m from its unstrained length
2) Total Energy = PE+KE+Elastic potential
Total Energy = mgh +1/2mv²+1/2ke²
Substitute the given value
5.0= 1.1(9.8)(0.2)+1/2(1.1)v²+1/2(120)(0.0898)²
Solve for v
5.0 = 2.156+0.55v²+0.48338
5.0-2.156-0.48338= 0.55v²
2.36 =0.55v²
v² = 2.36/0.55
v² = 4.29
v ,= √4.29
v = 2.07m/s
Hence the required velocity is 9.28m/s
Wavelength is defined as distance between two troughs or two crests !!
so in this wavelength is 4 metres !!
Answer:
Please mark as Brainliest!!
Explanation:
Explanation:
In a chemical formula, the symbols for each element in the compound are followed by subscripts that tell us how many of that element are in the compound.
For an example, let's look at the the formula for compound glucose:
C
6 H
12 O
6
________
The subscripts that follow each element's symbol indicate how many of that element are in the compound.
Answer:
Newton's second law
Explanation:
The relationship between mass and acceleration is described in Newton's Second Law of Motion. His Second Law states that the more mass an object has, more force is necessary for it to accelerate.
