How fast they are falling
Answer:
a) Initial angular speed = 30 rad/s
b) Final angular speed = 70 rad/s
Explanation:
a) We have equation of motion s = ut + 0.5at²
Here s = 400 radians
t = 8 s
a = 5 rad/s²
Substituting
400 = u x 8 + 0.5 x 5 x 8²
u = 30 rad/s
Initial angular speed = 30 rad/s
b) We have equation of motion v = u + at
Here u = 30 rad/s
t = 8 s
a = 5 rad/s²
Substituting
v = 30 + 5 x 8 = 70 rad/s
Final angular speed = 70 rad/s
To make a base line mark to know where she started measuring the snails movement, at the end of the day she can measure from her first line to her last to see how far the snail went.
Hope this helped!
<span />
The energy of light for a single photon that has a wavelength of 347 nm is 5.698 × 10-¹⁹ J
HOW TO CALCULATE ENERGY:
- The energy of a photon of light can be calculated by using the following formula:
E = hf
Where;
- E = energy of photon (J)
- h = Planck's constant (6.626 × 10-³⁴J/s)
- f = frequency (Hz)
- However, the frequency must first be calculated using the formula as follows:
λ = v/f
Where;
- λ = wavelength
- v = speed of light (3 × 10⁸m/s)
- f = frequency
- E = 6.626 × 10-³⁴ × 8.6 × 10¹⁴
- Therefore, the energy of light for a single photon that has a wavelength of 347 nm is 5.698 × 10-¹⁹ J.
Learn more at: brainly.com/question/13407202?referrer=searchResults
Fine, so we have the equation
S = So + Vo.t + at²/2
We have the final height = 0 and since its dropped, Vo = 0, our a will be the gravity, negative since its falling
0 = So + 0.t - gt²/2
0 = So - gt²/2
Since So is our h, lets change the letter
0 = h - gt²/2
gt²/2 = h
gt² = 2h
t² = 2h/g
t = 
