How do you calculate the change in speed?

Physics

2 answers:

Dennis_Churaev [7]3 years ago

8 0

v = d/t

d = distance

t = time

the change in speed (Δv)

$\tt \Delta v=\dfrac{d_2-d_1}{t_2-t_1}$

marta [7]3 years ago

3 0

Multiply the acceleration by time to obtain the velocity change: velocity change = 6.95 * 4 = 27.8 m/s . Since the initial velocity was zero, the final velocity is equal to the change of speed. You can convert units to km/h by multiplying the result by 3.6: 27.8 * 3.6 ≈ 100 km/h .

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Light with a wavelength of 494 nm in vacuo travels from vacuum to water. Find the wavelength of the light inside the water in nm

Mamont248 [21]

Answer:

370.6 nm

Explanation:

wavelength in vacuum = 494 nm

refractive index of water with respect to air = 1.333

Let the wavelength of light in water is λ.

The frequency of the light remains same but the speed and the wavelength is changed as the light passes from one medium to another.

By using the definition of refractive index

$n = \frac{wavelength in air}{wavelength in water}$