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
Mkey [24]
3 years ago
5

What is the density of a roll of pennies containing 50 pennies?

Physics
1 answer:
ololo11 [35]3 years ago
4 0

Answer:

Density is defined as:

Density = Mass/Volume

Now, density is an intensive property, this means that if you have 10 grams of a given material or 1000 grams of the same material, in both cases you will find the same density.

Then a roll of 50 pennies has the same density that a single penny.

The measures of a single penny are:

Mass = 2.5 g

Thickness = 1.52 mm

Radius = 9.525 mm

The coin is a cylinder, and the volume of a cylinder is:

V = pi*r^2*h

where:

pi = 3.14

r = radius = 9.525mm

h = thikness = 1.52mm

The volume is:

V = 3.14*(9.525mm)^2*1.52mm = 433.015 mm^3

The density will be:

D = 2.5g/433.015mm^3 = 0.00577 g/mm^3

You might be interested in
What is one way we can use agriscience to affect photosynthesis and increase plant growth?
pochemuha

Answer:

casa. Completa las oraciones con el pronombre de objeto directo correcto, según el contexto.

1. Tu ropa está sucia. ¿Por qué no ____ lavas?

2. Ellos tienen muchos libros. ____ tienen en la estantería del despacho.

3. La casa de mi mamá tiene muchas ventanas, pero no ______ abre todos los días.

4. Profesora, Ud. debe usar la cochera. ¿ ______ve allí?

5. ¿Quieres ir al cine con nosotros? _____ llamamos antes de salir.

6 0
2 years ago
Sarah, who has a mass of 55 kg, is riding in a car at 20 m/s. She sees a cat crossing the street and slams on the brakes! Her se
avanturin [10]

Answer:

-2200 N

Explanation:

The change in momentum of Sarah is equal to the impulse, which is the product between the force exerted by the seatbelt on Sarah and the time during which the force is applied:

\Delta p=I\\m \Delta v = F \Delta t

where

m is the mass

\Delta v is the change in velocity

F is the average force

\Delta t is the duration of the collision

In this problem:, we have:

m = 55 kg is Sarah's mass

\Delta v = 0-20 = -20 m/s  is the change in velocity

\Delta t = 0.5 s  is the duration of the collision

Solving for F, we find the force exerted by the seatbelt on Sarah:

F=\frac{m\Delta v}{\Delta t}=\frac{(55)(-20)}{0.5}=-2200 N

Where the negative sign indicates that the direction of the force is opposite to that of Sarah's initial velocity.

5 0
3 years ago
The greater the mass of an object
lesya [120]

Answer:

The greater the velocity, the greater the Force needs to be, and the greater the fiction is

Explanation:

I don't know what you are working on so here are a few responses

7 0
3 years ago
A ball is thrown in the air with a vertical velocity of 12 m/s.
melamori03 [73]
The answer to the question is gonna be A
4 0
3 years ago
Read 2 more answers
How does the energy possessed by a ball bearing change as it travels along an incline ramp?
ruslelena [56]
Kinetic energy increases, potencial energy decreases,
kinetic energy + potential energy = energy, energy can not be destroyed, just transformed


7 0
3 years ago
Other questions:
  • How can a negative ion form from an atom ?
    15·1 answer
  • Use the following terms in the same sentence: proton, neutron, and isotope.
    6·1 answer
  • ) A skier starts down a frictionless 32° slope. After a vertical drop of 25 m, the slope temporarily levels out and then slopes
    9·1 answer
  • the lever in the figure below accomplishes 5.0 newtons-meters of work raising a 25 newton weight. How far,in meters is the weigh
    7·1 answer
  • "A pendulum is pulled back from its equilibrium (center) position and then released. When the pendulum bob is halfway between th
    11·1 answer
  • At its peak, a tornado is 53.0 m in diameter and carries 465-km/h winds. What is its angular velocity in revolutions per second?
    10·1 answer
  • Consider the air moving over the top of the light bulb. The streamlines near the bulb will be squeezed together as the air goes
    10·1 answer
  • The negatively charged particle in an atom is a(n):
    12·1 answer
  • ممكن حل بسرعة <br>please help ​
    6·2 answers
  • Calculate the total momentum of the three-sphere system if the three spheres are swung at −1.0 msto the left.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!