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
Svetach [21]
3 years ago
15

Pls help meh Kdjdjeidjndiejdididjdjjdidjdjdiejd

Physics
2 answers:
Nadya [2.5K]3 years ago
6 0

Answer:

i think b

Explanation:

i'm not sure

REY [17]3 years ago
5 0

Answer:

I think both pure substance and an element .

hope it is helpful to you ☺️☺️

You might be interested in
A Ferris wheel with a radius of 5 m is rotating at a rate of one revolution every 2 minutes. How fast is a rider rising when the
Olenka [21]

Explanation:

Below is an attachment containing the solution.

5 0
3 years ago
A TV satellite dish is designed to receive radio waves of wavelength
Verizon [17]

Answer:

4.7 GHz

Explanation:

Applying,

v = λf................. Equation 1

Where v = velocity of the radio wave, λ = wavelength, f = frequency

make f the subject of the equation

f = v/λ.............. Equation 2

Note: A radio wave is an electromagnetic wave, as such it moves with a velocity of 3.00 x 10⁸ m/s

From the question,

Given: λ = 0.0644 meters

Constant: v = <em>3.00 x 10⁸ m/s</em>

Substitute these values into equation 2

f = (3.00 x 10⁸)/0.0644

f = 4.66×10⁹ Hz

f = 4.7 GHz

3 0
3 years ago
Suppose an object is moving in a straight line at 50 miles/hr. According to Newton's first law of motion, the object will ______
Setler [38]

Answer:

B

Explanation:

Newton's first law of motion states that a body will remain in its state of rest or if its in motion will continue to move in a straight line, unless its acted upon by an external force.The ability of an object to stay at rest or in motion if its in motion is known as inertia.

Hence the correct option is B.

8 0
3 years ago
) each plate of a parallel-plate air-filled capacitor has an area of 0.0020 , and the separation of the plates is an electric fi
Dvinal [7]
I attached the full question.
We know that for a parallel-plate capacitor the surface charge density is given by the following formula:
\sigma=\varepsilon_0 \frac{V}{d}
Where V is the voltage between the plates and d is separation.
Voltage is by definition:
V=Ed
Voltage is analog to the mechanical work done by the force.
Above formula is correct only If the field is constant, and we can assume that it is since no function has been given.
The charge density would then be:
\sigma=\varepsilon_0 \frac{Ed}{d}=\varepsilon_0E\\&#10;\sigma= 8.85\cdot10^{-12}\cdot 2.1\cdot 10^6= 0.0000185\frac{c}{m^2}
Please note that elecric permittivity of air is very close to  elecric permittivity of vacum, it is common to use them <span>interchangeably</span>.

6 0
4 years ago
Astronomers use many different pieces of equipment to study space: optical telescopes on Earth, space telescopes, and space prob
Kobotan [32]
Then it would be C if D has been eliminated
8 0
3 years ago
Read 2 more answers
Other questions:
  • Compared to its weight on Earth, a 5kg object on the moon will weigh
    5·1 answer
  • The electrons of photosystem ii are excited and transferred to electron carriers. From which molecule or structure do the photos
    14·1 answer
  • Newton’s law of cooling states that dx dt = −k(x−A) where x is the temperature,t is time, A is the ambient temperature, and k &g
    10·1 answer
  • In 1996, NASA performed an experiment called the Tethered Satellite experiment. In this experiment a 2.30 104-m length of wire w
    10·1 answer
  • The velocity versus time graph of particle A is tangent to the velocity versus time graph for particle B at point O. What is the
    11·1 answer
  • A potter's wheel is rotating around a vertical axis through its center at a frequency of 2.0 rev/s . The wheel can be considered
    8·1 answer
  • Which is a group pragram acoholics recover in
    5·1 answer
  • The fact that desert sand is very hot in the day and very cold at night is evidence that sand has
    7·2 answers
  • It's velocity changes, but its speed remains the same.<br> The<br> true or false
    8·1 answer
  • Two people stand facing each other at a roller skating rink then push off each other. a). What is the momentum of the system bef
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!