PHYSICS HIGH SCHOOL

Generally , people water their plants with 100% H2o--- no solutes added. What sort of environment does this create around the roots of the plant? (Hypotonic, hypertonic or isotonic ) EXPLAIN!!

Answers

Answer 1
Answer: This is difficult to explain, but it's hypotonic. HypERtonic is where there is where the cells shrivel up because there is more solute (salt is an example of a solute) on the outside, so the water rushes outward towards it and shrivels the cell. Plants like lots of water so they like to be hypotonic, and since you're adding pure H2O, there is no solute being added, so the solute is in the cell, causing the water to rush in. Isotonic is equal throughout the solution.

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Choose the correct description, of what happens to the electron speeds in a more massive white dwarf. Choose the correct description, of what happens to the electron speeds in a more massive white dwarf. As the mass of a white dwarf increases, the pressure must increase to resist gravity. To do this, the electrons must move faster. As the mass of a white dwarf increases, the pressure must decrease to resist gravity. To do this, the electrons must move faster. As the mass of a white dwarf increases, the pressure must decrease to resist gravity. To do this, the electrons must move slower. As the mass of a white dwarf increases, the pressure must increase to resist gravity. To do this, the electrons must move slower.

Answers

Answer:

As the mass of a white dwarf increases, the pressure must increase to resist gravity. To do this, the electrons must move faster.

Explanation:

A white dwarf also known as degenerate dwarf is a star or an electron degenerate matter and is as massive as the Sun but only about as large in size as planet Earth.

The maximum mass of a white dwarf is about 1.4 times the mass of the Sun.

Also, as the mass of a white dwarf increases, the pressure must increase to resist gravity and to do this, the electrons must move faster.

Which one of the following types of electromagnetic radiation causes certain substances to fluoresce? A. Ultraviolet rays
B. Infrared waves
C. X rays
D. Cosmic rays

Answers

It is Ultra-Violet rays

The temperature of a balloon is lowered with liquid nitrogen. The balloon appears to deflate because the A. nitrogen has burst the balloon. B. nitrogen is now inside the balloon. C. balloon has lost energy and condensed. D. gas in the balloon lost energy and condensed.

Answers

The temperature of a balloon is lowered with liquid nitrogen. The balloon appears to deflate because the gas in the balloon lost energy and condensed. The answer is letter D.

How many Btu per hour are lost through a 100-square foot wall that is made up of a 12-inch thick concrete block wall with an R value of 1.89 and 4 inches of fiberglass insulation with an R value of 14.8? The inside temperature is 65 degrees F and the outside temperature is 15 degrees F.

Answers

Answer:

300 Btu per hour

Explanation:

given data

area = 100-square foot

thick = 12 inch

R value at 12 = 1.89

R value at 4 = 14.8

inside temperature = 65 degrees F

outside temperature = 15 degrees F

to find out

How many Btu per hour

solution

we get here How many Btu per hour that is express as

Btu per hour = (area*temp\ difference)/(r\ value\ 12 + r\ value\ 4)   ............1

put here value we get

Btu per hour = (100(65-15))/(1.89+14.8)

Btu per hour = 299.580

so Btu per hour is 300 Btu per hour

A bicyclist is in a 50-km race. He says he had an average velocity of 35. What is missing in the cyclist’s velocity? A. units only B. units and distance C. direction only D. units and direction

Answers

Answer: (D). The unit and direction is missing.

Explanation:

Velocity:  Velocity is the speed of the object with direction and it is the vector quantity. The unit of velocity is m/s.

Average velocity: Average velocity is defined as the total distance divided by the total time.

\Delta v=(D)/(T)

Here,

D = Total distance

T = Total time

According to the question:

The unit and the direction is missing in the cyclist's velocity.

Hence, The unit and direction is missing.
ACTUALLY... The answer is units and direction.

What instrument uses a magnetic field to magnify imags up to 100000000?

Answers

transmission electron microscope
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