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rjkz [21]
3 years ago
8

Different wavelengths of light are seen as different. A. Atoms B. Sounds C. Colors D. Speeds

Physics
1 answer:
attashe74 [19]3 years ago
7 0
Different wavelengths of light are seen as colors
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A minivan sells for 33,200 dollars. Give the price of the minivan in a) kilodollars and megadollars
amm1812
The prefix of a unit could give you a hint on its extent with respect to the base unit. In this case, the base unit is money in terms of dollars. When you say kilodollars, that would be 1,000 times as large as a dollar. Hence,

33,200 dollars * 1 kilodollar/ 1,000 dollars =  33.2 kilodollars

When you say megadollars, that would be a million times as large as a dollar. Hence,

33,200 dollars * 1 megadollar/1,000,000 dollars = 0.0332 megadollars

6 0
4 years ago
1. Which has more kinetic energy, a 40 kg cheetah running at 25 m/s or a 4,000 kg elephant moving at 2 m/s? How much more energy
s2008m [1.1K]

Answer:

1. The elephant has more kinetic energy at this speed and mass. It has 4,500 J more KE.

2. The elephant would have to go at a speed of 2.5 m/s to reach the same KE as the cheetah.

Explanation:

You would use the formula KE=1/2mv^2.

This formula would be filled in and completed twice, once for the elephant and once for the cheetah.

Cheetah:

KE = 1/2 (40) (25) ^2

KE = 12,500 J

Elephant:

KE = 1/2 (4,000) (2) ^2

KE = 8,000 J

This shows that the cheetah has more KE.

Then you would subtract the elephants amount of J from the cheetahs to find the difference.

Difference = 12,500 J - 8,000 J

Difference = 4,500 J

I hoped this helped with the first part :)

For the second part:

To find the speed the elephant would have to run you would fill in and complete the equation once more with different distance results.

KE = 1/2 (4,000) (2.5) ^2

KE= 12,500 J

7 0
3 years ago
Two ladders of uniform density and equal mass m are propped up against
-BARSIC- [3]

Answer:

i need some more coins LMAI

7 0
4 years ago
A supply plane needs to drop a package of food to scientists working on a glacier in Greenland. The plane flies 110 m above the
zysi [14]

Answer:

The distance is 709.5 m.

Explanation:

Given that,

Speed = 150 m/s

Distance = 110 m

Suppose, How far short of the target should it drop the package?

We need to calculate the time

Using equation of motion

s=ut+\dfrac{1}{2}gt^2

t^2=\dfrac{2s}{g}

Where, g = acceleration due to gravity

t = time

Put the value into the formula

t=\sqrt{\dfrac{2\times110}{9.8}}

t=4.73\ sec

We need to calculate the distance

Using formula of distance

d= vt

Put the value into the formula

d=150\times4.73

d=709.5\ m

Hence, The distance is 709.5 m.

8 0
3 years ago
Why is electric magnet a temporary magnet
PtichkaEL [24]
The electric magnet (Electromagnetic) is temporary because you can turn it on and off.  When it's power source is gone, the magnet becomes useless.  Usually it's power source is a battery, but it could be solar with a switch.  Hope this helps.  Please give me brainliest is this helps you.
6 0
3 years ago
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