Answer:
0.3376 mm
Explanation:
The computation of the spacing in mm between the slits is shown below:
As we know that
where,
= wavelength
L = distance from the scrren
= spanning distance
As there are 11 bright fingers seen so m would be
= 11 - 1
= 10
Now placing these values to the above formula
So, the spacing is
= 0.3376 mm
We simply applied the above formula.
Most geologists accept radiometric dating techniques as valid because radioactive elements decay at a constant and measurable rate.
Answer: Option C
<u>Explanation:</u>
Scientists prefer radioactive dating to carbon dating because it is more accurate in measuring. The analysis depends upon the radioactive decay of radioactive isotopes of any matter in a given rock or soil.
The parent atoms and daughter atoms are compared while studying, and hence age can be calculated easily. Radioactive decay depends upon the given half-life of the atom, which is a constant and is known. So, it would be very easy to calculate the number of progeny atoms and parent atoms and find out their age.
Answer:
0.011 m.
Explanation:
Energy stored in the spring = Energy of the projectile.
1/2ke² = mgh ................ Equation 1
Where k = spring constant, e = extension or compression, m = mass of the projectile, g = acceleration due to gravity, h = height.
make e the subject of the equation
e = √(2mgh/k)............................. Equation 2
Given: k = 12 N/cm = 1200 N/m, m = 15 g = 0.015 kg, h = 5.0 m
Constant: g = 9.8 m/s²
Substitute into equation 2
e = √(2×0.015×5/1200)
e = √(0.15/1200)
e = √(0.000125)
e = 0.011 m.
This question involves the concepts of charge and potential difference.
The net charge on the balloon is "2.6 x 10⁻⁸ C".
<h3>Net Charge on Balloon</h3>
The balloon has a shape of a sphere. Therefore, the formula for the charge on the surface of a sphere can be used here, as follows:
where,
- Q = net charge = ?
- r = radius of balloon = 15 cm = 0.15 m
- V = potential difference = 1560 V
- = permittivity of free space = 8.85 x 10⁻¹² C²/N.m²
Therefore,
Q = (4π)(8.85 x 10⁻¹² C²/N.m²)(0.15 m)(1560 V)
Q = 2.6 x 10⁻⁸ C = 26 nC
Learn more about charge here:
brainly.com/question/19886264
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