Answer:
Explanation:
Let the cross sectional area be a cm .
volume of hydrometer inside liquid = 12 x a = 12 a
weight of liquid displaced = 12a x .8 x g = 9.6 a g
For free floatation of liquid
weight of hydrometer = weight of displaced liquid
9.6 a g = 100 g
a = 10.41 cm²
cross sectional area = 10.41 cm².
Answer:
Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
Explanation:
Hospitals are interested in ocean research because:the ocean floor is rich with oil and natural gas oysters are a valuable source of copper powerful anesthetics are found in marine organisms fish are a valuable source if protein
Answer: F = 3.28 × 10^-7 N
Explanation:
Alpha particle charge (q)= 2e
e = 1.6 × 10^-19
q = 2e = 2 × (1.6 *10^-19) = 3.2 × 10^-19
1/4πEo = 9 × 10^9
Distance(r) = 5.3 × 10^-11m
The force of attraction between the two particles is given by:
F = (1/4πEo) (q1q2 / r^2)
F = [(9 × 10^9) (3.2 × 10^-19) (3.2 × 10^-19)] / (5.3 × 10^-11)^2
F = (92.16 × 10^(9 - 19 - 19)) / 28.09 × 10^-22
F = (92.16 × 10^-29) / 28.09 × 10^-22
F = 3.28 × 10^(-29 + 22)
F = 3.28 × 10^-7 N
Answer:
- The emission wavelength for λ(3,4) is 1875.24 nm
- The emission wavelength for λ(4,6) is 2625.34 nm
- The emission wavelength for λ(4,7) is 2165.69 nm
- The emission wavelength for λ(4,8) is 1944.70 nm
- The emission wavelength for λ(4,9) is 1817.54 nm
Explanation:
Using Rydberg equation
where;
R is Rydberg equation = 1.097 x 10⁷ m⁻¹
For λ(3,4)
For λ(4,6)
For λ(4,7)
For λ(4,8)
For λ(4,9)