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3 years ago

Which of the following account for the difference between radio waves , infrared waves, and ultraviolet rays?

Physics

2 answers:

gayaneshka [121]3 years ago

5 0

Answer: B

The only difference between these different types of radiation is their wavelength or frequency

Explanation:

vaieri [72.5K]3 years ago

4 0

Answer:

The answer is B. frequency and D. wavelength for APX.

Explanation:

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According to ohms law if you don't change the value of the resistor and you double the voltage in a circuit the amount of curren

padilas [110]

Answer: D (doubled)

According to ohm's law

I = V/R ,

V = IR ; R = constant and V is doubled

From the equation

V is directly proportional to the current, and it is given that R is constant ;

2V = 2I. R since R = constant

Hence I is doubled.

5 0

4 years ago

Consider a particle with initial velocity v⃗ that has magnitude 12.0 m/s and is directed 60.0 degrees above the negative x axis.

lina2011 [118]

Answer:

-6.0 m/s, 10.4 m/s

Explanation:

To find the x- and y- components, we have to apply the formulas:

$v_x = v cos \theta$

$v_y = v sin \theta$

where

v = 12.0 m/s is the magnitude of the vector

$\theta$ is the angle between the direction of the vector and the positive x-axis

Here, the angle given is the angle above the negative x-axis; this means that the angle with respect to the positive x-axis is

$\theta=180^{\circ} - 60^{\circ} = 120^{\circ}$

So, the two components are:

$v_x = (12.0 m/s) cos 120^{\circ}=-6.0 m/s$

$v_y = (12.0 m/s) sin 120^{\circ}=10.4 m/s$

5 0

3 years ago

Even at such low fractions of the speed of light these stars are moving quite quickly (thousands of kilometers a second) compare

yulyashka [42]

According to Doppler Effect, an observer at rest will perceive a shift in the wavelength or frequency of the radiation emitted by a source in movement.This shift is given by the formula:
$\frac{ \lambda - \lambda_{0} }{ \lambda_{0} } = \frac{-v}{c}$

where:
$\lambda$ = observed wavelength
$\lambda_{0}$ = wavelength at rest
v = speed of source (positive if towards the observer, negative if away from the observer)
c = speed of light

Therefore, we can solve for the observed wavelength:
$\lambda = \lambda_{0} (\frac{-v}{c}) + \lambda_{0} \\ \lambda = \lambda_{0} (1 - \frac{v}{c})$

Substituting the given data:
$\lambda = 656.46 (1 - \frac{300}{299792})$
= 655.80 nm

Hence, the observed wavelength of the line would be 655.80 nm. Note that this value is smaller than the one at rest, which means that we have a blue-shift, as expected for an approaching source.

5 0

3 years ago

a force of 20 n is directed at an angle of 609 above the x-avis. a second force of 20 n is directed at an angle of 60 below the

rosijanka [135]

20 N , in +x direction is the vector sum of these Toro forces.

<h3>What is force?</h3>

The word "force" has a specific meaning in science.
At this level, calling a force a push or a pull is entirely appropriate.
A force is not something an object "has in it" or that it "contains."
One thing experiences a force from another.
There are both living things and non-living objects in the concept of a force.
Force is used to describe a body's tendency to modify or change its state as a result of an external cause.
When force is applied, the body can also alter its size, shape, and direction. kicking a ball, pushing and pulling on the door, or kneading dough are a few examples.
The newton, abbreviated N, is the SI unit of force.