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
Papessa [141]
3 years ago
6

Hi please help with this question! Need the workings.

Physics
1 answer:
andreyandreev [35.5K]3 years ago
6 0
<span>Mass of the copper penny m = 2.6 g Atomic mass of copper = 63.55, Atomic number = 29, So the number of neutrons = Atomic mass - Atomic number = 63 - 29 = 34 a. Neutron mass = 34 x (2.6 / 63.55) = 1.4 grams Copper atoms per mole = 6.040 x 10^23 atoms/mol moles of copper = 2.6 / 63.06 = 0.04123 mol Total atoms in the copper = 6.040 x 10^23 atoms/mol x 0.04123 mol = 0.25 x 10^23 atoms Number of electrons in the copper = 29 per atom Mass of the electron = 9.085 x 10^-28 g b. Electron mass = 0.25 x 10^23 x 29 x 9.085 x 10^-28 = 65.86 x 10^-5 g</span>
You might be interested in
Two cars are traveling on a desert road between three consecutive poles, as shown in the figure. After 5.1 s, they are side by s
Ksenya-84 [330]
There's no info about the cars starting off differently, so as far as we know they have been side by side all the way. 
<span>So from the last telephone pole: </span>
<span>(a) and (b): the displacement of both cars is 65.5m
the average speed for both car is 65.5m/5.0s = 13.1m/s</span>
7 0
3 years ago
A p-wave arrives at 3:00:00 and the s-wave arrives at 3:07:20, what is the exact distance that the seismic station is away from
maxonik [38]

The exact distance from the seismic station to the epicenter is 6000 km.

<h3>Epicenter of earthquake</h3>

The earthquake's epicenter is the point above the fault location on the earth's surface.

Given that:

A p-wave arrives at 3:00:00 and the s-wave arrives at 3:07:20.

Difference in arrival time = 3:07:20 - 3:00:00 = 7 minutes 20 seconds

From the earthquake time travel graph, a time difference of 7 min 20 sec is at x = 6

The exact distance from the seismic station to the epicenter is 6000 km.

Find out more on Epicenter of earthquake at: brainly.com/question/1969968

4 0
2 years ago
Can you talk in space?
klio [65]
Astronauts in space<span> do </span>talk<span> to each other. In the spacecraft, there is plenty of air, so they just </span>talk<span> normally. When they are spacewalking, they </span>talk<span> by means of radios in their helmets. The radio waves, again, have no problem in </span>space<span>, but they're not sound.</span>
5 0
4 years ago
Un ascensor sube con una velocidad constante de 2 m/s. Un niño que va en el ascensor lanza una piedra de 0.6 kg hacia arriba con
Natasha_Volkova [10]

Answer:

W = 7.5 J

Explanation:

W = KE

W = ½mv² = ½0.6(5²) = 7.5 J

Niño, piedra y ascensor están todos en el mismo marco de referencia inercial.

los 2 m / s no son importantes.

6 0
3 years ago
Which of the following surfaces reflects the most light?
Lunna [17]
Aluminum foil reflects more light
3 0
4 years ago
Read 2 more answers
Other questions:
  • Energy is what makes matter do
    9·1 answer
  • The change of motion of a body is proportional to the applied force, and it takes place in the direction of a straight line in w
    7·2 answers
  • In the rectangle to the left, if
    6·1 answer
  • Tita= 55°<br>Answer and proper explanation pls in English​
    6·1 answer
  • Two long straight wires are separated by a distance of d = 0.40 m. The currents are I1 = 1.0 A to the right in the upper wire an
    5·2 answers
  • ANSWER ASAP Which factor determines the amount of gas that can dissolve in ocean water? (A) the motion of the air above the ocea
    5·2 answers
  • if 2 magnets were forced together vertically on the same poles and suddenly released, how high would the top magnet travel? The
    11·1 answer
  • Which car has the most momentum? A. 1820 kg car that is traveling east at 30 m/s
    11·1 answer
  • A cube of wood 20 cm on each side is placed in a tub of water and is found to sink so that only 6 cm of the block is above the w
    5·1 answer
  • What is the period of oscillation for a pendulum that completes 3.00 cycles every 2.00 s?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!