An airplane is traveling at a speed of 200 km/h. Compute the speed of the airplane in m/s.

Mathematics

2 answers:

Nady [450]3 years ago

8 0

Given the speed is 200 km /hr

use 1 km = 1000 meter

1 hr = 3600 seconds

$200 km/hr = \frac{200*1000}{1*3600} m/s$

simplifies to

$\frac{5000}{9} m/s$

$55.6 m/s$

so option C

Harrizon [31]3 years ago

6 0

Answer: C) 55.6 m/s

Step-by-step explanation: 200km/1hr x 1000m/1km x 1hr/60min x 1min/60s = 55.6 m/s

If the conversion factors are properly set up and all numbers are correct, the unwanted units cancel out leaving the units of the final answer.

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garri49 [273]

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Electrons execute 1.4*10^6 revolutions per sec in a magnetic field of flux density

seropon [69]

The charge of the electrons is $8.02 \times 10^{-19} \ C$ .

The given parameters:

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Mass of electron, m = 9.11 x 10⁻³¹ kg

The angular speed of the electron is calculated as follows;

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The charge of the electrons is calculated as follows;

$F_c= m\omega ^2 r\\\\F_{B}= qvB = q\omega r B \\\\F_c = F_B\\\\m\omega ^2 r = q\omega r B \\\\q = \frac{m\omega ^2 r}{\omega r B} \\\\q = \frac{m \omega }{B} \\\\q = \frac{9.11 \times 10^{-31} \times 8.798 \times 10^6}{10^{-5}} \\\\q = 8.02 \times 10^{-19} \ C$