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3 years ago

A cell membrane is semi permeable what does it mean

Physics

1 answer:

timurjin [86]3 years ago

7 0

Meaning some particles can cross the membrane, and some things can not.

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Determine the ratio of the electrostatic force to the gravitational force between a proton and an electron, FE/FG. Note: k = 8.9

Paraphin [41]

Answer:

$\frac{F_e}{F_g} = 2.3 \times 10^{18}$

Explanation:

The gravitational force is given by Newton's Law of Gravity:

$F_g = \frac{Gm_1m_2}{r^2}$

The electrostatic force is given by Coulomb's Law:

$F_e = \frac{kq_1q_2}{r^2}$

The ratio between these two forces is

$\frac{F_e}{F_g} = \frac{\frac{kq_1q_2}{r^2}}{\frac{Gm_1m_2}{r^2}} = \frac{kq_1q_2}{Gm_1m_2} = \frac{(8.99\times 10^{-12})(1.6\times 10^{-19})(1.6 \times 10^{-19})}{(6.67\times 10^{-11})(9.1 \times 10^{-31})(1.6 \times 10^{-27})} = 2.3 \times 10^{18}$

7 0

4 years ago

Read 2 more answers

Newspapers used as covers to keep out the cold were called _________.

Nata [24]

The answer is hoover blankets♥️

5 0

4 years ago

NBAのバスケットボールコートのサイズは

Marysya12 [62]

28.65m x 15.24m

Explanation:

The size of a basketball court in the NBA is usually 28.65m x 15.24m giving a total court area of 436.62m².

The NBA is the acronym for National Basketball Association. It comprises of several teams from across United states and Canada in basketball league.

The game is played by hand with a target basket.
For each successive throw into the basket, 1 or 2 or 3 points can be awarded.
In feets the dimensions are 94 by 50 feet
From the dimension we can accurately say that a basketball court is rectangular in shape.
James Naismith is credited with the invention of the game of basketball

learn more:

Basketball jump brainly.com/question/11222255

#learnwithBrainly

6 0

3 years ago

A musician in a group plays a wrong note. would this note disrupt the harmony of the rhythm of the song being played? explain yo

Eddi Din [679]

If a musician plays a wrong note, he will disrupt the harmony of rhythm of the song. This is because, he will be able to produce a sound of different wavelength which will cause a possible destructive interference with the waves being produced by his groupmates.

8 0

3 years ago

What regulatory requirements must be met prior to a pilot acting as PIC of an aircraft towing a glider?

Klio2033 [76]

Answer:

According to the federal aviation regulation for tow pilot, there are three regulatory requirements to be met.

Explanation:

1. The Pilot must hold at least a private pilot certificate with a category rating for powered aircraft.

2. The Pilot must have logged at least 100 hours of pilot-in-command time in the aircraft category.

3. The Pilot must have a logbook endorsed by an authorized instructor who certifies that the person has received ground and flight training in gliders and is proficient in the following;

a. Procedures and techniques of safe towing of gliders.

b. Signal use.

c. Bank maximum angles.

d. Emergency procedures.

4 0

4 years ago