How to find initial velocity, when the acceleration is slowing down.

When antimatter interacts with an equal mass of ordinary matter, both matter and antimatter are converted completely into energy

Ilya [14]

Answer:

v = 5.88 10⁷ m / s

Explanation:

For this exercise we use the relation

E = m c²

also indicate that all energy is converted into kinetic energy

E = K = ½ (M-2m) v²

where m is the mass of antimatter and M is the mass of the ship's mass. Factor two is due to the fact that equal amounts of matter and antimatter must be combined

we substitute

m c² = ½ (M-2m) v²

v² = $2 \frac{m}{M+2m} \ c^2$

let's calculate

v = $\sqrt{2 \ \frac{4 \ 10^4 }{2 \ 10^6 + 2 \ 4 \ 10^4} \ (3 \ 10^8)^2}$

v = $\sqrt{ 34.615 \ 10^{14}}$

v = 5.88 10⁷ m / s

8 0

3 years ago

A rope is vibrating in such a manner that three equal-length segments are found to be vibrating up and down with 321 complete cy

kolbaska11 [484]

Answer:

2.48 m is the length of the rope.

Explanation:

Cycle period is 321

Time is 20 second

Wave travels at speeds = 26.4 m/s

We know that,

$\text { Frequency }=\frac{1}{T} \text { (For one cycle) }$

Frequency required for 321 complete cycle in 20 seconds is

$\text { Frequency }(f)=\frac{321}{20}$

Frequency = 16.05 hz

We know that,

$\text { Wavelength }=\frac{\text { wave velocity }}{\text { frequency }}$

$\lambda=\frac{v}{f}$

λ = wavelength, the distance between "wave crests" (m)

v = wave velocity, the "speed" that waves are moving in a direction (m/s)

f = frequency, (cycles/ or Hz)

$\lambda=\frac{26,4}{16.05}$

λ = 1.65 m

As per given question "length of the rope has three equal length segment"

$\mathrm{Length of the rope}=\frac{3}{2} \lambda$

$\mathrm{Length of the rope }=\frac{3}{2} \times 1.65$

$\mathrm{Length of the rope}=1.5 \times 1.65$

Length of the rope = 2.48 m

Therefore, length of the rope is 2.48 m.

7 0

3 years ago

¿Qué información se puede obtener de un gráfico rapidez versus tiempo?

yaroslaw [1]

Answer:

la velocidad se mide con el tiempo del tiempo que tarda el tiempo se mide por la hora del día y el reloj

Explanation:

5 0

3 years ago

Read 2 more answers

For the electric power transmission system shown in the figure above, what is the ratio ns/np for the step-up transformer? assum

Ann [662]

I am attaching the missing figure

If we assume 100% efficiency, this means that the input power of the transformer must be equal to the output power

We divide output/input

240,000/12,000 = 20

This means that the transformer has a turns ratio of 1:20

ns/np = 20/1 = 20

The voltage is amplified 20 times by the transformer, but this also means that the current decreases by a factor of 20, so the total power remains the same.