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4 years ago

What types of waves make up the smallest part of the electromagnetic spectrum?

2 answers:

8 0

it's visible light :)

hope this helps, and if you have any more questions feel free to message me!

HAVE A BEAUTIFUL DAY!!!

soldier1979 [14.2K]4 years ago

6 0

The answer is Microwaves I'm pretty sure

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A 5.00-kg box slides 5.50 m across the floor before coming to rest. What is the coefficient of kinetic friction between the floo

Stels [109]

Answer:

μk = 0.08

Explanation:

Applying the work-energy theorem, we know that the change in kinetic energy of the box, is equal to the total work done on it.
The only force acting on the box capable of doing work, is the dynamic friction force.
This force is just the product of the coefficient of kinetic friction, and the normal force.
In this case, if the floor is level, the normal force is equal and opposite to the gravity force, Fg.
So we can write the following expression:

$\Delta K = -\frac{1}{2} * m* v_{0} ^{2} = \mu_{k} *m*g* cos (180\º)$

Replacing by the givens, we can solve for μk, as follows:

$\mu_{k} = \frac{v_{0}^{2} }{2*g*d} = \frac{9 (m/s)2}{2*9.8 m/s2*5.50m} = 0.08$

5 0

3 years ago

a football is kicked toward a goal keeper with an initial speed of 20m/s at an angle of 45 degrees with the horizontal .at the m

algol [13]

Answer:

3.18 m/s

Explanation:

Given that

Initial speed of the ball, u = 20 m/s

Angle of inclination, θ = 45°

Distance from the ball, h = 50 m

Using equations of projectile to solve this, we have

We start by finding the time of flight, T

T = 2Usinθ/g

T = (2 * 20 * sin45)/9.8

T = (40 * 0.7071) / 9.8

T = 28.284/9.8

T = 2.89 s

Next we find the Range, R

R = u²sin2θ/g

R = (20² * sin 90) / 9.8

R = (400 * 1) / 9.8

R = 400/9.8 = 40.82 m

Distance the gk must cover

40.82 - 50 m

-9.18 m or 9.18 m in the opposite direction.

Speed of the GK = d/t

9.18 / 2.89 = 3.18 m/s

5 0

4 years ago

the sun on average is 93 billion miles from earth.how many meters is this? express it using power of ten and using a metric pref

Aleksandr [31]

Answer:

1.4966862 x 10^14 meters

1.55 x 10^11 km

3 0

3 years ago

After watching a video about submarines, Jamil wants to learn more about the ocean. which question could be answered through sci

SOVA2 [1]

<span>Submarines are equipped with water tanks called ballast tanks that fill up to submerge the vessel. Emptying the tanks and filling them with air causes the submarine to surface.</span>

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3 years ago

QUICK: A circular loop of radius r is rotated through a magnetic field B, which of the following would increase the magnetic flu

WITCHER [35]

Doubling B and quadrupling r

6 0

3 years ago

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