Electromagnetic radiation that has a high frequency will have a _______

The speed of light is around 3.000E5 km/s. It takes approximately 9.221 seconds for light reflected from the moon Vega to reach

laila [671]

Answer:

$d=2.77\cdot 10^6\ Km$

Explanation:

Speed

The speed is calculated as the ratio of the distance d by the time t:

$\displaystyle v=\frac{d}{t}$

If we need to calculate the distance, the equation is solved for d:

d=v*t

The speed of light is

$v=3\cdot 10^5\ Km/s$

It takes t=9.221 seconds for light reflected from the moon Vega to reach planet Xartan.

We can calculate the average distance the light traveled:

$d=3\cdot 10^5\ Km/s*9.221$

$d=2,766,300\ Km$

Or, in scientific notation:

$\mathbf{d=2.77\cdot 10^6\ Km}$

6 0

3 years ago

A 58.4-kg person, running horizontally with a velocity of +3.97 m/s, jumps onto a 14.8-kg sled that is initially at rest. (a) Ig

AURORKA [14]

Answer:0.017

Explanation:

Given

mass of person $m_1=58.4 kg$

mass of sled $m_2=14.8 kg$

velocity of person $v_1=3.97 m/s$

let u be the combined velocity of person and sled

conserving momentum

$m_1v_1=(m_1+m_2)u$

$u=\frac{m_1}{m_1+m_2}\times v_1$

$u=\frac{58.4}{58.4+14.8}\times 3.97$

$u=3.16 m/s$

(b)Total distance traveled by sled and man is 30 m

deceleration Provided by surface is $\mu _k\cdot g$

where $\mu _k$ is coefficient of kinetic friction

using $v^2-u^2=2as$

$0-3.16^2=2(-\mu _k\cdot 9.8)\cdot 30$

$\mu _k=0.0169$

6 0

3 years ago

What does a mass extinction look like in the fossil record?

IrinaK [193]

Answer:

the answer is D

Explanation:

Mass extinctions were first identified by the obvious traces they left in the fossil record. ... Such dramatic changes in adjacent rock layers make it clear that mass extinctions were geologically rapid and suggest that they were caused by catastrophic events (e.g., a period of intense volcanic activity).

8 0

3 years ago

Read 2 more answers

On land, coal is transported primarily by train. A typical large coal train may be about 1.5 km long and may consist of 120 cars

WINSTONCH [101]

Answer:

equivalent power = 6.60 × $10^{12}$ W