1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Doss [256]
3 years ago
5

About 3% of the water on Earth is freshwater. Only about 40% of that freshwater is available for human use. Why is so much fresh

water unavailable for human use?
A) It is frozen.
B) It is polluted.
Eliminate
C) It is salt water.
D) It is in aquifers.
Physics
2 answers:
Pie3 years ago
7 0
A) it is frozen i think
hjlf3 years ago
7 0
The answer is B: Polluted
You might be interested in
How much work is done by a force of 20N while moving an object through distance 10 m of the force ​
tatiyna

Answer:

  200 J

Explanation:

Work = Force × Distance

Work = (20 N)(10 m) = 200 N·m = 200 J

200 joules of work are done by a force of 20 N over a distance of 10 m.

8 0
3 years ago
Describe the effect of an increase in temperature on the average speed of the air molecules
AVprozaik [17]
Increasing temperature increasing the amount of energy in the system causing the average speed to increase.

think giving a 3 yr old a 6 pack of Reese's Cups. that os what would happen of you increase the temperature of a system
3 0
3 years ago
The mysterious visitor that appears in the enchanting story The Little Prince was said to come from a planet that "was scarcely
FromTheMoon [43]

Answer:

Part a)

g = 1 \times 10^{-5} m/s^2

Part b)

v = 0.011 m/s

Explanation:

Part a)

As we know that the acceleration due to gravity is given as

g = \frac{GM}{R^2}

g = \frac{G(\frac{4}{3}\pi R^3 \rho)}{R^2}

g = \frac{4}{3}\pi \rho G R

now we know that

\rho = \frac{M}{\frac{4}{3}\pi R^3}

\rho = \frac{5.98 \times 10^{24}}{\frac{4}{3}\pi (6.37 \times 10^6)^3}

\rho = 5523.2 kg/m^3

now we have

g = \frac{4}{3}\pi (5523.2) (6.67 \times 10^{-11})(6.5)

g = 1 \times 10^{-5} m/s^2

Part b)

As we know that the escape speed is given as

v = \sqrt{\frac{2GM}{R}}

v = \sqrt{2gR}

v = \sqrt{2(1\times 10^{-5})(6.5)}

v = 0.011 m/s

8 0
3 years ago
A Describe and explain what
melomori [17]

Answer:

The extension is directly proportional to the force applied.

ex: if the force is doubled, the extension doubles. This works until the limit of proportionality is exceeded.

Hope this helped~

Explanation:

3 0
2 years ago
Read 2 more answers
Air pressure is 1.0 · 105 N/m2, air density is 1.3 kg/m3, and the density of soft drinks is 1.0 · 103 kg/m3. If one blows carefu
natita [175]

Answer:

v = 27.456 m/s

Explanation:

The support pressure needed of the water in the straw can be calculated by the formula

Given that,

P = r*g*h

= 1000*9.8*0.05 Pa.= 490 Pa

This pressure is compensated by 0.5*r*v^2 of the air,

Hence,

0.5*1.3*v^2 = 490

velocity of air blown into the straw =

v = 27.456 m/s

8 0
3 years ago
Other questions:
  • You start driving north for 9 miles, turn right , and drive East for another 40 miles. At the end of driving, what is your staig
    6·1 answer
  • every object that has mass attracts every other object with a gravitational force. it has been proven that the size of the gravi
    10·2 answers
  • Which type of wave would actually slow down when moving from the air into the ocean?
    12·2 answers
  • Ohms law in symbols is
    9·1 answer
  • 1) Beth rode the Flying Saucer ride at her favorite amusement park. The ride hung from a rod and swung back and forth while simu
    13·2 answers
  • A bowling ball encounters a 0.760-m vertical rise on
    9·1 answer
  • When a surface is submerged in a fluid, the resultant pressure force on the body acts in what manner? Assume no shear forces are
    6·1 answer
  • What is the wave speed of a wave that has a frequency of 20 Hz and a wavelength of 30 m?
    13·1 answer
  • Explain the expression “light travels at a speed”.
    12·1 answer
  • This problem, a squid at rest suddenly sees a predator coming toward it and needs to escape. Assume the following:______.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!