2 years ago

The frequency of an FM radio station is 89.3 MHz. Calculate its period.

1 answer:

5 0

The period of any wave is 1 / (its frequency).

89.3 MHz means 89.3 million per second

1 / (89.3 million per second) = 1.12 x 10⁻⁸ second.

That's 0.0000000112 second.

0.0112 microsecond

11.2 nanoseconds

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A ball is thrown at 60 degrees and lands in 18.5 seconds what is the velocity of the ball at the start

n200080 [17]

Answer:

the initial velocity of the ball is 104.67 m/s.

Explanation:

Given;

angle of projection, θ = 60⁰

time of flight, T = 18.5 s

let the initial velocity of the ball, = u

The time of flight is given as;

$T = \frac{2u\times sin(\theta)}{g} \\\\2u\times sin(\theta) = Tg\\\\u = \frac{Tg}{2\times sin(\theta)} \\\\u = \frac{18.5 \times 9.8}{2\times sin(60^0)} \\\\u = 104.67 \ m/s$

Therefore, the initial velocity of the ball is 104.67 m/s.

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2 years ago

A friend waves & yells at you. If the sound took 3.20 seconds to reach you and the speed of sound is 340 m/s,

xeze [42]

Answer:

1088 m

Explanation:

3.00 seconds times by 340 =1020+68=1088

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2 years ago

Calculate the kinetic energy of a 2.2kg brick when it has a speed of 4.9m/s

Alborosie

Answer:

Kinetic energy of the brick is 26.4 Joule

3 0

2 years ago

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See how a block and tackle system can increase your mechanical advantage. You will need two broomsticks, a rope, and two helpers

Lisa [10]

Answer:

You are the one who will answer that because you will experiment

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2 years ago

Jason applies a force of 4.00 newtons to a sled at an angle 62.0 degrees from the ground. What is the component of force effecti

Andreas93 [3]

Answer: 1.88 N

Explanation:

Data:

Force = 4.00N
angle = 62°
horizontal force = ?

Solution:

The trigonometric ratio that relates horizontal - leg to hypotenuse is the cosine.

That ratio is:

                        horizontal - leg
cos(angle) = -------------------------
                          hypotenuse

So, applied to the force, that is:

                             horizontal force
cos (angle) = -----------------------------------
                                 total force

So, clearing the horizontal component you get:

horizontal force = force * cos (angle)

Substitute the data given:

horizontal force = 4.00N * cos(62°) = 4.00N * 0.4695 = 1.88 N

Answer: 1.88N

7 0

2 years ago

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