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3 years ago

Which wave has a higher frequency than microwaves but lower frequency than UV waves?

Physics

1 answer:

Effectus [21]3 years ago

3 0

Answer:

Infrared

Visible light

Explanation:

Electromagnetic waves are waves consisting of oscillations of the electric and the magnetic field in a plane perpendicular to the direction of motion of the wave.

Electromagnetic waves travel in a vacuum at the speed of light, which is a constant value:

$c=3.00\cdot 10^8 m/s$

Also, electromagnetic waves are classified into 7 different types, depending on their wavelength and frequency. From highest to lowest frequency, we have:

gamma-rays $10^{20}-10^{24} Hz$

x-rays $10^{17}-10^{20}Hz$

ultraviolet $10^{15}-10^{17} Hz$

visible $[4-7.5]\cdot 10^{14} Hz$

infrared $10^{14} Hz$

microwaves $10^{11}-10^{13} Hz$

radio waves

Therefore, from the table we see that both infrared and visible light have higher frequency than microwaves, but lower frequency than UV (ultraviolet).

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A car is traveling at 114 m/s and changes its velocity to 77 m/s in 9 sec.

suter [353]

Answer:

Given -

Initial Velocity, u = 114 m/s
Final velocity, v = 77 m/s.
Time taken, t = 9 sec.

To find - 

Acceleration of the car.

Solution -

Here, using the equation of motion v = u + at we can find the acceleration easily.

★ Here,

V = Final velocity
U = Initial Velocity
A = Acceleration
T = Time.

Substituting the values -

→ 77 = 114 + a(9)

→ 9a = 114 - 77

→ 9a = 37

→ a = 37/9

→ a = 4.1 m/s

Therefore, the acceleration of the car will be 4.1 m/s.

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3 years ago

Which statement about ocean surface currents is false?

Leno4ka [110]

"Ocean surface currents are beautifully depicted in the drawing that accompanies this question."

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3 years ago

When throwing a baseball overhand, what should you avoid?

daser333 [38]

when throwing a baseball overhand the muscles you use are

deltoids.

triceps.

latissimus dorsi.

abdominal muscles.

hips.

glutes.

so you should stretch and make sure you dont pull or hurt these muscles but you dont have to throw overhand Pitching underhand wasn't a gimmick for Gheen, it was his preferred style. He was mentioned in newspapers across the country for his unorthodox technique. An MLB umpire confirmed pitching underhand is allowed. also a good exercise to work out your arm would be A baseball push-up is meant to increase the power of your arms and core, and to increase the coordination between the two. This exercise also promotes good posture because it forces you to flex the muscles of the core in order to keep the lower back from bending.

and i'll leve you with a quick fact: Softball pitchers use an underhand motion that is not as stressful to the shoulder joint as the overhand pitch used in baseball. Softball pitchers can often pitch several games in one day, and often have an extended career of many years due to the lower stress levels on the shoulder joint.

good luck on your throwing!!

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3 years ago

Which phrase describes an atom?

kiruha [24]

You haven't included the list of choices that goes with the question, so it's
impossible for me to choose the correct one, or to help you choose it.

Regarding my ability to answer the question and collect the 5-point bounty,
I'm free to make up any phrase of my own that correctly describes an atom.

-- very very very very very very very tiny

-- includes even tinier particles, with electric charges
both positive and negative

-- smaller than the wavelength of visible light

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3 years ago

Displacement vector of 4 km north, 2 km south, 5 km north, and 5km south combine to a total displacement of ? A 2 km South b 16

Andrews [41]

It is C. 16 km north.

3 0

4 years ago