Answer:
7.5 × 10¹⁵ Hz
Explanation:
Given data
- Wavelength of the radio waves (λ): 40 nm = 40 × 10⁻⁹ m = 4.0 × 10⁻⁸ m
- Frequency of the radio waves (ν): ?
- Speed of light (c): 3.00 × 10⁸ m/s
We can determine the frequency of the radio waves using the following expression.
c = λ × ν
ν = c/λ
ν = (3.00 × 10⁸ m/s)/4.0 × 10⁻⁸ m
ν = 7.5 × 10¹⁵ s⁻¹ = 7.5 × 10¹⁵ Hz
The answer is B photosynthesis
Answer: Mechanical waves can be Longitudinal or Transverse.
Explanation: So... a mechanical wave is a kind of wave that is a oscillation of matter. Mechanical waves can also transfer energy. However, while it still can transfer over long distances, the wave is limited. it means that the oscillation material is limited. A mechanical wave can be a transverse wave or a longitudinal wave or a surface wave. but since there is only Longitudinal or Transverse that should be your answer.
A transverse wave, its a wave that particles move up and down.
A Longitudinal wave is a wave that moves back and forth.
Answer: 6
Explanation:
Because it's 6 after the decimal
Given parameters:
Density of the rock = 2.2g/cm³
Volume of rock = 66.5mL
Unknown:
Mass of the rock = ?
Solution:
Density is the mass per unit volume of a body. It is mathematically expressed as shown below;
Density = 
So;
Mass = Density x Volume
We need to take the given parameters to the same unit before we solve;
convert mL to cm³
1mL = 1cm³; 66.5mL is the same as 66.5cm³
Now solve;
Mass = 2.2 x 66.5 = <u>146.3g</u>
<u></u>
<u>The mass of the rock is 146.3g</u>
