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3 years ago

What type of wave is produced when the frequency of a visible light wave is increased

1 answer:

7 0

-- If the frequency of a wave is too high for our eyes to detect it ... but not too too high ... we call it an ultraviolet wave.

-- If the wave's frequency is even higher than that, we call it an X-ray wave.

-- If the wave's frequency is even higher than that, we call it a Gamma Ray wave.

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When riding a 10-speed bicycle up a hill, a cyclist shifts the chain to a larger-diameter gear attached to the back wheel. Why i

dimaraw [331]

To solve this problem we will use the concepts of the moment of rotational inertia, angular acceleration and the expression of angular velocity.

The rotational inertia is expressed as follows:

$I = \sum mr^2$

Here,

m = Mass of the object

r = Distance from the rotational axis

The rotational acceleration in terms of translational acceleration is

$\alpha = \frac{a}{R}$

Here,

a = Acceleration

R = Radius of the circular path of the object

The expression for the rotational speed of the object is

$\omega = \frac{\Delta \theta}{\Delta t}$

Here,

$\Delta \theta$ is the angular displacement of the object

The explanation by which when climbing a mountain uphill is changed to a larger pinion, is because it produces a greater torque but it is necessary to make more pedaling to be able to travel the same distance. Basically every turn results in less rotations of the rear wheel. Said energy that was previously used to move the rotation of the wheel is now distributed in more turns of the pedal. Therefore option a and c are correct.

This would indicate that the correct option is D.

8 0

4 years ago

MacGyver is riding on a skateboard and moving west of the velocity of 7 m/s. Macgyver has a mass of 92 kg and the skateboard has

ivann1987 [24]

Answer:

64.5

Explanation:

(m1 + m2) v initial = (m1 * v1 final) + (m2 * v2 final)

(92 + 8)(-7) = (92 x 2) + (8 x v2 final)

(100)(-7) = (184) + (8 x v2 final)

-700 = (184) + (8 x v2 final)

-516 = (8 x v2 final)

-516/8 = v2 final

-64.5 = v2 final

8 0

3 years ago

Hair color is a trait that’s controlled by many genes working together. Each gene contributes to this trait only in a small prop

Anna35 [415]

The correct answer should be polygenic inheritance

Most genes that affect the way a human being looks have been inherited in this way. Not only hair but also things like height and weight, eye color, and similar.

5 0

4 years ago

Read 2 more answers

A child bounces a 51 g superball on the sidewalk. The velocity change of the super bowl is from 22 m/s downward to 14 m/s upward

noname [10]

Answer:

$F=1.02x10^{-3} N$

Explanation:

From the exercise we know:

$m=51g*\frac{1kg}{1000g}=0.051kg$

$v_{1}=-22m/s$

$v_{2}=14m/s$

$t_{2}-t_{1}=1800s$

So, the average acceleration is:

$a=\frac{v_{2}-v_{1}}{t_{2}-t_{1}}=\frac{(14-(-22))m/s}{1800s}=0.02m/s^2$

The average force is:

$F=m*a=(0.051kg)(0.02m/s^2)=1.02x10^{-3} N$

8 0

3 years ago

Assuming a nearly frictionless ride, what can you say about a roller coaster’s potential and kinetic energy from the top to the

ArbitrLikvidat [17]

The mechanical energy of the roller coaster is sum of kinetic energy K and gravitational potential energy U:
$E=K+U$
where
$K= \frac{1}{2}mv^2$ is the kinetic energy
$U=mgh$ is the gravitational potential energy

Since the ride is frictionless, the total mechanical energy E is conserved during the ride. Therefore, at the top of the hill, the potential energy is maximum, because h (the height) is maximum, and this means the kinetic energy is minimum (because the sum of K and U is constant), so the velocity will be minimum. Viceversa, at the bottom of the hill, the potential energy will be minimum (because h is minimum), so the kinetic energy K will be maximum, and the velocity v of the roller coaster will be maximum.

4 0

3 years ago