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
bezimeni [28]
3 years ago
6

1. A certain atom has 20 electrons, 21 neutrons, and 20 protons. What is

Physics
1 answer:
Flauer [41]3 years ago
5 0

Answer:

41

Explanation:

An atom that contains 20 protons, 21 neutrons, and 20 electrons has an atomic mass of 41.

You might be interested in
The vibrations along a transverse wave move in a direction _________.
GrogVix [38]

Answer: perpendicular to it oscillations.

Explanation: A transverse wave is a wave whose oscillations is perpendicular to the direction of the wave.

By perpendicular, we mean that the wave is oscillating on the vertical axis (y) of a Cartesian plane and the vibration is along the horizontal axis (x) of the plane.

Examples of transverse waves includes wave in a string, water wave and light.

Let us take a wave in a string for example, you tie one end of a string to a fixed point and the other end is free with you holding it.

If you move the rope vertically ( that's up and down) you will notice a kind of wave traveling away from you ( horizontally) to the fixed point.

Since the oscillations is perpendicular to the direction of wave, it is a transverse wave

5 0
3 years ago
Can something have energy without having momentum? explain. can something have momentum without having energy? defend your answe
marta [7]
Momentum  is a product mass and velocity. If a certain object posses a kinetic energy, then it should have a momentum since it is moving which has a velocity. However, if the object is at rest and only has potential energy, then it would not have momentum. So, for the first question the answer would be yes, an object can have energy without having any momentum. For the second question, every object whether it is moving or at rest, possess some energy, potential for an object at rest and kinetic for an object that is moving. Thus, the answer would be no, an object having momentum would always have energy.
8 0
3 years ago
Birds sitting on a single power line don't get shocked. But if they were to place one foot on each of two lines, ___________ wou
Natalka [10]
Current would flow between them and they would receive a terrible shock.
5 0
3 years ago
Read 2 more answers
While playing a scavenger hunt game, Anthony walks 48.0 m to the south and then walks 12.0 m to the west. What single straight-l
Alenkasestr [34]
As these are distances created by moving in a straight line, using a trigonometric analysis can solve the missing single straight-line displacement. Looking at the 48m and 12m movements as legs of a triangle, obtaining the hypotenuse using the pythagorean theorem will yield us the correct answer.
This is shown below:

c^2 = 48^2 + 12^2
c = sqrt(2304 + 144)
c = sqrt(2448)
c = 49.48 m

To obtain the angle at which Anthony walks 49.48, we obtain the arc tangent of (12/48). This is shown below:

arc tan (12/48) =14.04 degrees.

Therefore, Anthony could have walked 49.48 m towards the S 14.04 W direction.
4 0
3 years ago
Select the correct answer.
Liono4ka [1.6K]

Answer: The electromagnetic waves reach Earth, while the mechanical waves do not.

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • During a testing process, a worker in a factory mounts a bicycle wheel on a stationary stand and applies a tangential resistive
    6·1 answer
  • What effect does Earth’s spherical shape have on the amount of sunlight that reaches the equator?
    14·1 answer
  • It is estimated that 26 large pizzas are about right to serve 66 students of a physics club meeting. How many pizzas would be re
    11·1 answer
  • True or false: We still use the republican calendar created by the French.​
    5·1 answer
  • What are four main ways weathering can happen
    13·1 answer
  • Light with a wavelength of 612 nm incident on a double slit produces a second-order maximum at an angle of 25 degree. What is th
    15·1 answer
  • The radio waves of a particular AM radio station vibrate 680,000 times per second. What is the wavelength of the wave?
    6·1 answer
  • A brass road is 2cm long at instance to what is the lense for a temperature rise of 100k, If the expansivity of brass is 18x10^-
    10·1 answer
  • The standard kilogram is a platinum-iridium cylinder 39.0 mm in height and 39.0 mm in diameter. What is the density of the mater
    7·1 answer
  • A rightward force of 4.0 N is exerted upon an object for a distance of 3.0 meters.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!