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
s344n2d4d5 [400]
2 years ago
7

Scientists study how the continents move. Why might scientists use a model

Physics
1 answer:
tigry1 [53]2 years ago
3 0

Answer:

B. It is too slow to observe directly

Explanation:

They move too slow to be able to observe how they move.


I hope it helps! Have a great day!
bren~

You might be interested in
Which statement about the atomic nucleus is correct? a. The nucleus is made of protons and neutrons and has a negative charge. b
Anon25 [30]
"b. The nucleus is made of protons and neutrons and has a positive charge" is the only option that is true about the atomic nucleus. The protons give it a positive charge.
5 0
3 years ago
A lemon with mass 0.3 kg falls out of a tree from a height of 1.8 m. How much mechanical energy does the lemon have just before
Zina [86]
Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. It can either be kinetics or potential. In this problem you know it starting position so you can calculate it's potential energy (PE):

<span>PE=mass∗gravity∗height=0.3kg∗9.8m/s2∗1.8m=?

</span>The answer will typically be given in joules:

1J=kg∗m2s2 Could be wrong...  But I believe it is 5.3...? as a final product.
3 0
3 years ago
Read 2 more answers
If the period of a wave is 0.05 s, then what is its frequency?
yKpoI14uk [10]
Frequency = 1/time period = 1/0.05 = 20s^-1. 
8 0
3 years ago
Read 2 more answers
Find the kinetic energy of an electron whose de broglie wavelength is 34.0 nm.
dezoksy [38]
The De Broglie wavelength of the electron is
\lambda=34.0 nm=34 \cdot 10^{-9} m
And we can use De Broglie's relationship to find its momentum:
p= \frac{h}{\lambda}= \frac{6.6 \cdot 10^{-34} Js}{34 \cdot 10^{-9} m}=1.94 \cdot 10^{-26} kg m/s

Given p=mv, with m being the electron mass and v its velocity, we can find the electron's velocity:
v= \frac{p}{m}= \frac{1.94 \cdot 10^{-26} kgm/s}{9.1 \cdot 10^{-31} kg}=  2.13 \cdot 10^4 m/s

This velocity is quite small compared to the speed of light, so the electron is non-relativistic and we can find its kinetic energy by using the non-relativistic formula:
K= \frac{1}{2}mv^2= \frac{1}{2}(9.1 \cdot 10^{-31} kg)(2.13 \cdot 10^4 m/s)^2=2.06 \cdot 10^{-22} J
3 0
3 years ago
How is the independent variable affected by the dependent variable
stiv31 [10]

Answer:

A dependent variable is a variable that is tested in an experiment. An independent variable is that can be modified. Depending on what you are testing, the dependent variable will change accordingly to the dependent variable.

- I'm reading this back and it doesn't make much sense, if you want me to reword this I can

5 0
3 years ago
Other questions:
  • In an effort to protect a rhino, volunteers are following its steps with air monitoring and ground cameras. The rhino starts on
    8·1 answer
  • To hoist himself into a tree, a 72.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch
    5·1 answer
  • A temperature inversion can adversely affect air quality and is characterized by ________
    5·1 answer
  • If you double the net force on an object what is the result of the acceleration
    11·1 answer
  • As a 2-kg ball rolls down a ramp, the net force on it is 10 N. What is the acceleration?
    9·1 answer
  • A deer walking at 3.29 m/s speeds up to 13.38 m/s, covering a distance of 63.5 meters during this acceleration. How much time di
    6·1 answer
  • It would not be economical to connect the houses to the National Grid.Give one reason why.
    11·1 answer
  • An inclined plane creates a mechanical advantage of 5. What would the input force need to be to create an output force of 20 N?
    12·1 answer
  • A football player kicks a football, from ground level, with an initial velocity of 27.0 m/s at an angle 30° above the horizontal
    11·1 answer
  • How fast is an object going if it travels from San Diego to Anaheim in 1.25 hours (hr)? The distance from San Diego to Anaheim i
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!