A train rolls to a stop along a horizontal track without the conductor applying the brakes. What answer choice BEST
explains why this occurred?
A)
The train ran out of momentum.
The opposing force of friction stopped the train.
The natural state of the train is not to be in motion.
D)
The force of gravity slowed the train until it stopped.

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

graph b

step-by-step explanation:

one solution- graph a (clear intercepting point.)

no solution- graph b (they're parallel, there will never be a point of interception.)

infinite solutions- graph c (all points intercept.)

27 +27 or 27times 2=54

the diffrence is 0