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4 years ago

State whether the light from an object moving towards us will be red shifted or blue shifted and explain why.

Physics

1 answer:

denis23 [38]4 years ago

3 0

Answer:

The light from an object which is coming towards us will be blue shifted.

Explanation:

According to the Doppler effect the movement of the source towards the observer will lead to increase in thew apparent frequency by the Doppler formula,

$f'=\frac{c+v_{o} }{c-v_{s} }f$

Now when the there is increase in frequency then the wavelength is decrease because it is inversely related to frequency.

The wavelength of blue shift is lies in the range of 450-490 nm and the wavelength of red shift lies in the region of 635-700 nm.

Therefore, decrease in the wavelength will lead to blue shift.

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What variables affect density weight,conductivity,color,volume, or mass

tatiyna

Answer:

Density is affected by volume and mass.

Explanation:

Density is defined as the quantity of mass per unit of volume, or expressed mathematically, d = m/v.

6 0

3 years ago

How does energy travel? Where is the initial source of energy in our solar system? What is the process that gives off energy fro

olasank [31]

Answer:

How does energy travel?

One way the energy can travel is through radiation. An object can radiate energy in the form of electromagnetic waves, for example when a strong light is turned on and you can feel some heat coming from it, or when you walk under the sunlight and you can feel the heat in your skin.

Where is the initial source of energy in our solar system?

In the solar system, the source of energy comes from the Sun, and the sun irradiates that energy to all the nearby objects.

What is the process that gives off energy from the sun called?

The process is called radiation, this is all the energy that comes from the sun in the form of different electromagnetic waves (light in the visible range, UV rays, etc...)

4 0

3 years ago

A student rides her bicycle to school, which is 6 km north of her home. After school, she rides to the grocery store that is 2 k

Free_Kalibri [48]

The total distance traveled from home to the grocery store would be 8km.

Because both distances she traveled were in the same direction, north, both displacement and distance travel were equal.

If the student traveled in two different directions, such as north to the school and south to the grocery store, her distance traveled would be 8km but her displacement would only be 6km.

3 0

3 years ago

Find the distance along an arc on the surface of the earth that subtends a central angle of 1 minutes (1 minute = 1/60 degree).

-Dominant- [34]

Answer:

1.152 miles

Explanation:

Given: central angle = 1 minute = $(\frac{1}{60}) ^{o}$

radius of the earth = 3960 miles

The length of an arc = $\frac{\alpha }{360^{o} }$ 2 $\pi$ r

where: $\alpha$ is the central angle, and r is the radius.

Thus,

Distance along the arc = $\frac{\alpha }{360^{o} }$ 2 $\pi$ r

Distance along the arc = $\frac{(\frac{1}{60}) ^{o} }{360^{o} }$ x 2 x $\frac{22}{7}$ x 3960

= $\frac{(\frac{1}{60}) ^{o} }{360^{o} }$ x 24891.4286

= 1.1524

The required distance along an arc is 1.152 miles.

4 0

4 years ago

The force between two objects, each of charge +Q is measured as +F when the objects are separated a distance d apart. If the cha

dybincka [34]

Answer:

$F'=4F$

Explanation:

According to Coulomb's law, the magnitude of the force (F) between two objects with the same charge(+Q), separated a distance (d) apart, is defined as:

$F=\frac{kQ^2}{d^2}$

Here k is the Coulomb constant. The charge on each object is doubled, that is $Q'=2Q$ :

$F'=\frac{kQ'^2}{d^2}\\F'=\frac{k(2Q)^2}{d^2}\\F'=4\frac{kQ^2}{d^2}\\F'=4F$

5 0

4 years ago