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3 years ago

Do gamma rays have lower or higher frequency than microwaves

Physics

1 answer:

Sidana [21]3 years ago

3 0

Gamma rays have <em>extremely</em> shorter wavelengths than microwaves and therefore have higher frequencies.

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The micrometer (1 μm) is often called the micron. (a) How many microns make up 3.0 km? (b) How many centimeters equal 3.0 μm? (c

Tomtit [17]

Answer:

3 x 10⁻⁹km

3 x 10⁻⁴cm

2.73 x 10⁶μm

Explanation:

A micron is a subunit of measurement usually for length dimensions.

1μm = 1 x 10⁻⁶m

a. How many microns make up 3km;

Now convert to meter first;

1000m = 1km

So, 3km will be made up of 3000m

So;

1 x 10⁻⁶m = 1μm

3000m = $\frac{3000}{1 x 10^{-6} }$ = $\frac{3 x 10^{3} }{ 1 x 10^{-6} }$ = 3 x 10⁻⁹km

b. How many centimeters equal 3.0 μm?

Since;

1μm = 1 x 10⁻⁶m

3μm = 3 x 1 x 10⁻⁶ = 3 x 10⁻⁶m

So;

100cm = 1m;

1m = 100cm

3 x 10⁻⁶m = 3 x 10⁻⁶ x 10² = 3 x 10⁻⁴cm

c. How many microns are in 3.0 yd?

1yd = 0.91m

3yd = 3 x 0.91 = 2.73m

So;

1 x 10⁻⁶m = 1μm

2.73m will give $\frac{2.73}{1 x 10^{-6} }$ = 2.73 x 10⁶μm

3 0

3 years ago

Does gravity increase or decrease with greater distance?

Karo-lina-s [1.5K]

Decrease. Gravity is stronger here on earth than on the moon.

3 0

3 years ago

An 84.0 kg sprinter starts a race with an acceleration of 1.76 m/s2. If the sprinter accelerates at that rate for 11 m, and then

gulaghasi [49]

Answer:

t=17.838s

Explanation:

The displacement is divided in two sections, the first is a section with constant acceleration, and the second one with constant velocity. Let's consider the first:

The acceleration is, by definition:

$a=\frac{dv}{dt}=1.76$

So, the velocity can be obtained by integrating this expression:

$v=1.76t$

The velocity is, by definition: $v=\frac{dx}{dt}$ , so

$dx=1.76tdt\\x=1.76\frac{t^{2}}{2}$ .

Do x=11 in order to find the time spent.

$11=1.76\frac{t^2}{2}\\ t^2=\frac{2*11}{76} \\t=\sqrt{12.5}=3.5355s$

At this time the velocity is: $v=1.76t=1.76*3.5355s=6.2225\frac{m}{s}$

This velocity remains constant in the section 2, so for that section the movement equation is:

$x=v*t\\t=\frac{x}{v}$

The left distance is 89 meters, and the velocity is $6.2225\frac{m}{s}$ , so:

$t=\frac{89}{6.2225}=14.303s$

So, the total time is 14.303+3.5355s=17.838s

7 0

3 years ago

Look at the diagram provided. What would be the mechanical energy at Point #4?

goblinko [34]

Answer:

18000 J

Explanation:

From the question given above, the following data were obtained:

At point 4:

Mass of cart = 600 Kg

Velocity of cart (v) = 7.745 m/s

Kinetic energy (KE) =?

KE = ½mv²

KE = ½ × 600 × 7.745²

KE = 300 × 7.745²

KE ≈ 18000 J

Therefore, the mechanical energy of the cart at point 4 is 18000 J

6 0

3 years ago

Explain what is meant by the term “good mother dinosaurs.”

Anna007 [38]

The term “good mother dinosaurs” is a term given to a type of dinosaur called Maiasaura which lived in the Upper Cretaceous Period, about 76.7 million years ago. This term is given<span> to the Maiasaura because of the meaning of its name "Maia". This name means "good mother" because this type of dinosaur found near of the nest of eggs and embryos.</span>

4 0

4 years ago

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