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nignag [31]
3 years ago
12

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

Physics
1 answer:
Solnce55 [7]3 years ago
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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Spaceship 1 and Spaceship 2 have equal masses of 300kg. They collide. Spaceship 1's final speed is 3 m/s, and Spaceship 2's fina
fiasKO [112]

Answer:

B. 1500 kg*m/s

Explanation:

Momentum p = m* v

In any type of collision, the total momentum is preserved!

The total momentum before and the total momentum after the collision is the same. We know the mass and speed after the collision so we can calculate the total momentum.

p1 + p2 =

m1*v1 + m2*v2

m1 = me = 300 kg

v1 = 3 m/s

v2 = 2 m/s

Substitute the given numbers:

300*3 + 300+2

900 + 600

1500 kg*m/s, which is answer B.

3 0
3 years ago
2. A 0.8 kg tetherball hangs on the end of a cord. It is hit by a child and rises 2.1 m above the ground. a. What is the maximum
skad [1K]

Answer:

E = 16.464 J

Explanation:

Given that,

Mass of tetherball, m = 0.8 kg

It is hit by a child and rises 2.1 m above the ground, h = 21. m

We need to find the maximum gravitational potential energy of the ball. The formula for the gravitational potential energy is given by :

E = mgh

g is acceleration due to gravity

E = 0.8 kg × 9.8 m/s² × 2.1 m

= 16.464 J

So, the maximum potential energy of the ball is 16.464 J.

3 0
3 years ago
The speed of light is the fastest in which medium
wlad13 [49]

In vacuum, going at 2.99×10^8 m/s.

3 0
3 years ago
Read 2 more answers
Two atoms that are isotopes of one another must have the same number of what?
fredd [130]

Answer:

B

Explanation:

Two atoms which are isotopes of one another must have a different number of neutrons.

Isotopes are defined as atoms of the same element which have the same numbers of protons i.e. atomic number remains the same, but has different numbers of neutrons. It is observed that they have same chemical properties due to the same electronic configuration but physical properties differs.

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3 years ago
The height of the mercury column in a barometer is 756 mm Hg on
notsponge [240]

Answer:

    p = 1.0076 10⁵ Pa

Explanation:

Atmospheric pressure is given by the relation

         P = rho g h

In this case they indicate that the height of the column of mercury is h = 756 mm Hg

let's reduce the height to the SI system

          h = 756 mm (1m / 1000 mm)

          h = 0.756 m

let's calculate

        P = 13600 9.8 0.756

        p = 1.0076 10⁵ Pa

7 0
2 years ago
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