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Bas_tet [7]
3 years ago
7

Use the worked example above to help you solve this problem. If a car is traveling at a speed of 28.4 m/s, what is its speed in

miles per hour
Physics
1 answer:
dolphi86 [110]3 years ago
7 0

Answer:

The correct answer is - 63.61 miles/hour.

Explanation:

Meter and miles both are the measuring units of distance and speed units are meter per second and miles per hour. The numerical relation between these two units are as follows:

1 meter per second = 2.24 miles per hour

The car travels 28.4 m/s so in miles per hour it would be:

So, 28.4 meters per second = 28.4 * 2.24 miles per hour

28.4 meters per second = 63.61 miles per hour.

Thus, the correct answer is - 63.61 miles per hour.

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A jet airplane is in level flight. The mass of the airplane is m=9010kg. The airplane travels at a constant speed around a circu
Lyrx [107]

Answer:

The magnitude of the lift force L = 92.12 kN

The required angle is ≅ 16.35°

Explanation:

From the given information:

mass of the airplane = 9010 kg

radius of the airplane R = 9.77 mi

period T = 0.129 hours = (0.129 × 3600) secs

= 464.4 secs

The angular speed can be determined by using the expression:

ω = 2π / T

ω = 2 π/ 464.4

ω = 0.01353 rad/sec

The direction \theta = tan^{-1} ( \dfrac{\omega ^2 R}{g})

\theta = tan^{-1} ( \dfrac{0.01353 ^2 \times (9.77\times 1609)}{9.81})

θ = 16.35°

The magnitude of the lift force  L = mg ÷ Cos(θ)

L = (9010 × 9.81) ÷ Cos(16.35)

L = 88388.1  ÷ 0.9596

L = 92109.32 N

L = 92.12 kN

3 0
3 years ago
Speed of light in air is 3 x 10 m/s, determine the speed of light in the glass fibre.
Dafna11 [192]
30 speed of light in the glass
4 0
3 years ago
In an inelastic collision involving an isolated system, the final total momentum isA) more than the initial momentum.B) exactly
damaskus [11]

I think that the answer is C

5 0
3 years ago
Un libro del peso di 12 N è in equilibrio su un tavolo. Sapendo che il coefficiente di attrito statico vale 0,5, la forza di att
Tanzania [10]

Answer:

60

Explanation:

Translation -

A book weighing 12 N is balanced on a table. Knowing that the static friction coefficient is 0.5, how much is the friction force worth?

Friction force is

f = u * n

f = 0.5 * 12N

f = 60

4 0
4 years ago
Which of the following is a true statement? A. Electromagnetic waves consist of only changing electric fields. B. Electromagneti
just olya [345]
C. Electromagnetic waves don't always need a medium to travel. Note that they do vary in wavelength and frequency however their speed is fixed. Also, EM waves are always transverse and they consist of vibrating electric and magnetic fields.
7 0
4 years ago
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