<span>Wilhelm Conrad Roentgen discovered the x-ray
</span>
Answer:
A) 30 N upward
Explanation:
There are two forces on the block: buoyant force up and weight down. The net force is 5 N up, so:
5 N = B − W
The weight is 25 N so:
5 N = B − 25 N
B = 30 N
The buoyant force is 30 N up.
If both containers are pushed with equal force, the one moving faster would have less mass
Answer: The temperature increases on the stratosphere with the altitude, given that absorption of the ultraviolet rays by the ozone.
Explanation: On the stratosphere, the water vapor and the umidity are almost nonexistents and, in view of the absorption of ultraviolet rays by the ozon, the temperature increases, reaching 35,6º Fahrenheit.
The ozone is a unusual type of oxygen molecule. In the stratosphere, the ozone appears on a large scale and warms it up by the absorption of the ultraviolet rays energy.
I think the correct answer would be one half the wavelength. Waves would "feel bottom" when the water is at the depth of 0.5 of the wavelength. "Feel bottom" is a term used to describe that the depth of water affects the wave properties. Hope this answers the question.