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
Sidana [21]
3 years ago
7

How do i explain to kids how much water on earth is drinkable?

Physics
1 answer:
Sergio [31]3 years ago
5 0
3% of water on earth is fresh water and 2.4% of that is permanently frozen in glaciers 
You might be interested in
A 4.0 kg object will have a weight of approximately 14.8 N on Mars. What is the gravitational field strength on Mars?
zhannawk [14.2K]
Field strength =force/unit mass
= 14.8N/ 4kg = 3.7N/kg
8 0
3 years ago
Read 2 more answers
The annoying sound from a mosquito is produced when it beats its wings at the average rate of 600 wingbeats per second. What is
podryga [215]
Frequency is given by the formula cycles÷seconds

So if the mosquito can complete 600 cycles in one second, our formula will be

f=600÷1
f=600!

The frequency is 600 Hz
6 0
3 years ago
A wheelbarrow is a good example of a second-class lever. True or False
olganol [36]

Answer:

true

Explanation:

a wheelbarrow has its load situated between the fulcrum and the force the wheel Barrow is 2nd class because of its resistance between the force and the axis

3 0
3 years ago
What is meant by heat energys​
ad-work [718]

Answer:

heat energy is the form of energy produced by heat

when we burn heat a type of enery is came

4 0
2 years ago
Estimate how far apart the rays of deepest red and deepest violet light are as they exit the bottom surface. assume nred = 1.57
Harlamova29_29 [7]
We begin by noting that the angle of incidence is the one that's taken with respect to the normal to the surface in question. In this case the angle of incidence is 30. The material is Flint Glass according to the original question. The refractive indez of air n1=1, the refractive index of red in flint glass is nred=1.57, finally for violet in the glass medium is nviolet=1.60. Snell's Law dictates:
n_1sin(\theta_1)=n_2sin(\theta_2)
Where \theta_2 differs for each wavelenght, that means violet and red will have different refractive indices in the glass.
In the second figure provided details are given on which are the angles in question, \Delta x is the distance between both rays.
\theta_{2red}=Asin(\frac{sin(30)}{1.57})\approx 18.5705
\theta_{2violet}=Asin(\frac{sin(30)}{1.60})\approx 18.21
At what distance d from the incidence normal will the beams land at the bottom?
For violet we have:
d_{violet}=h.tan(\theta_{2violet})\approx 0.0132m
For red we have:
d_{red}=h.tan(\theta_{2red})\approx 0.0134m
We finally have:
\Delta x=d_{red}-d_{violet}\approx2.8\times10^{-4}m


6 0
3 years ago
Other questions:
  • Gizmo force and fan cart
    5·1 answer
  • It is necessary to develop alternative sources of energy because _____.
    11·1 answer
  • Describe the relationship between temperature and energy
    5·1 answer
  • Alex, a rescue piot drops a survival kit while her plane is flying horizontally at an altitude of 1800.0 m with a forward veloci
    7·1 answer
  • Define electric field intensity​
    8·1 answer
  • Turn this scentence to repirted speach.<br><br>i ate icecream<br>She said that..........​
    9·2 answers
  • 1:04 here dims its too short write at least 20 characters
    12·1 answer
  • A power plant burns coal to generate electricity. Suppose that 1000 J of heat (Q) from the coal fire enters a boiler, which is k
    7·1 answer
  • Ilang ektarya ang lawak na itinakda ni llda na maaaring gawin palaisdaan​
    5·1 answer
  • Difference between text-talk novel and flash fiction?​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!