A penny has a mass of 9.4g, a radius of 2cm, and a thickness/height of h=0.2cm....
A penny has a mass of 9.4g, a radius of 2cm, and a thickness/height of h=0.2cm. What is the density of the metal of which it is made?
Hint: ρ=mV
Hint 2: V(cyl)=π⋅r2⋅h
A) 1.8gcm3;
B) 5.9gcm3;
C) 3.2gcm3;
D) 3.7gcm3;
Homework Answers
Here, for the density
density = mass/volume
density = mass/(pi * r^2 * h)
density = 9.4/(pi * 2^2 * 0.20)
density = 3.7 gm/cm^3
the density of the metal is D) 3.7 g/cm^3
Add Answer to:
A penny has a mass of 9.4g, a radius of 2cm, and a
thickness/height of h=0.2cm....
1. A cylinder of mass m, height h and radius r floats partially submerged in a...
1. A cylinder of mass m, height h and radius r floats partially submerged in a liquid of density ρ. One third of the height of the cylinder is above the surface of the water. Johnny pushes the cylinder down by a small distance x<h/3, then he releases it from rest. A) prove that the resulting motion of the cylinder is a simple harmonic motion. B) Find the period of the small oscillations in terms of the given quantities (m,r,h,ρ)
A satellite of mass m is in a circular orbit of radius R2 around a spherical planet of radius R1 made of a material with density ρ. ( R2 is measured from the center of the planet, not its surface.) Use G for the universal gravitational constant.
A satellite of mass m is in a circular orbit of radius R2 around a spherical planet of radius R1 made of a material with density ρ. ( R2 is measured from the center of the planet, not its surface.) Use G for the universal gravitational constant.A) Find the kinetic energy of this satellite, KExpress the satellite's kinetic energy in terms of G, m, π, R1, R2, and ρ.B) Find U, the gravitational potential energy of the satellite. Take the gravitational potential...
A solid metal sphere has a radius of 3.39 cm c m and a mass of...
A solid metal sphere has a radius of 3.39 cm c m and a mass of 1.877 kg k g . What is the density of the metal in g/cm3 g / c m 3 ? (The volume of sphere is V=43πr3 V = 4 3 π r 3 .)
1. A cylinder of mass m, height h and radius r floats partially submerged in a...
1. A cylinder of mass m, height h and radius r floats partially submerged in a liquid of density ρ. One third of the height of the cylinder is above the surface of the water. Johnny pushes the cylinder down by a small distance x<h/3, then he releases it from rest. A) prove that the resulting motion of the cylinder is a simple harmonic motion. B) Find the period of the small oscillations in terms of the given quantities (m,r,h,ρ)...
A conducting disk of a radius a and a small height h is made of a...
A conducting disk of a radius a and a small height h is made of
a material
of a finite conductivity σ and a permeability o μ . It is placed on
the xyplane
in the presence of a uniform, time-varying, magnetic flux
density
B = azBo cos ωt as shown in Fig. 6.14. Ignoring time-delay of emf
at
different points on the disk, and neglecting the magnetic field
induced by
the current in the disk, compute
(a) induced emf...
The escape velocity is a function of a planet’s radius and mass. We also know that...
The escape velocity is a function of a planet’s radius and mass. We also know that the mass of an object is M = ρV where ρ is the mass density and V is the volume. The volume of a sphere is V = (4/3) π R3 a.) combine the formula for the escape velocity with the additional relationships given above and find an expression for the escape velocity as a function of the mass density and radius of a...
A solid, homogeneous sphere with a mass of m0, a radius of r0 and a density...
A solid, homogeneous sphere with a mass of m0, a radius of r0 and a density of ρ0 is placed in a container of water. Initially the sphere floats and the water level is marked on the side of the container. What happens to the water level, when the original sphere is replaced with a new sphere which has different physical parameters? Notation: r means the water level rises in the container, f means falls, s means stays the same....
2. A ring of negligible thickness has a radius R and mass density 1. Find expressions...
2. A ring of negligible thickness has a radius R and mass density 1. Find expressions for the moment of inertia about an axis perpendicular to the plane of the ring: a) through the center of the ring. b) through the edge of the ring.
Eo z-h/2 The cylinder in the figure has radius a, height h and lies along the z axis with the ori...
Eo z-h/2 The cylinder in the figure has radius a, height h and lies along the z axis with the origin in the middle. The cylinder is made by a perfect dielectric material and is polarized. The polarization vector is P Poay with (a) Find the density of all polarization charge distributions that may exist within or on t he cylinder. [4 points] (b) Without doing calculations, determine the direction of the electric field E at the origin. Briefly justify...
Consider a solid sphere of mass m and radius r being released from a height h...
Consider a solid sphere of mass m and radius r being released
from a height h (i.e., its center of mass is initially a height h
above the ground). It rolls without slipping and passes through a
vertical loop of radius R.
a. Use energy conservation to determine the tangential and
angular velocities of the sphere when it reaches the top of the
loop.
b. Draw a force diagram for the sphere at the top of the loop
and write...
A conducting disk of a radius a and a small height h is made of
a material
of a finite conductivity σ and a permeability o μ . It is placed on
the xyplane
in the presence of a uniform, time-varying, magnetic flux
density
B = azBo cos ωt as shown in Fig. 6.14. Ignoring time-delay of emf
at
different points on the disk, and neglecting the magnetic field
induced by
the current in the disk, compute
(a) induced emf...
2. A ring of negligible thickness has a radius R and mass density 1. Find expressions for the moment of inertia about an axis perpendicular to the plane of the ring: a) through the center of the ring. b) through the edge of the ring.
Eo z-h/2 The cylinder in the figure has radius a, height h and lies along the z axis with the origin in the middle. The cylinder is made by a perfect dielectric material and is polarized. The polarization vector is P Poay with (a) Find the density of all polarization charge distributions that may exist within or on t he cylinder. [4 points] (b) Without doing calculations, determine the direction of the electric field E at the origin. Briefly justify...
Consider a solid sphere of mass m and radius r being released
from a height h (i.e., its center of mass is initially a height h
above the ground). It rolls without slipping and passes through a
vertical loop of radius R.
a. Use energy conservation to determine the tangential and
angular velocities of the sphere when it reaches the top of the
loop.
b. Draw a force diagram for the sphere at the top of the loop
and write...
Most questions answered within 3 hours.
-
While rotating the tires on your car you notice a rock [mass =
0.1 Kg] stuck...
asked 17 minutes ago -
Using MARS simulator, write MIPS programs according to
the following scenarios: Receive a positive integer number...
asked 2 hours ago -
An object in front of a concave mirror has a real image that is
11.5 cm...
asked 2 hours ago -
Consider the reaction, C3 H8 + O2 --> CO2 + H2O. How many
moles of O2...
asked 4 hours ago -
You and your opponent both roll a fair die. If you both roll the
same number,...
asked 4 hours ago -
In a study of the accuracy of fast food drive-through orders,
Restaurant A had 257 accurate...
asked 4 hours ago -
Identify and describe in detail the four categories of
institutions that could be included in a...
asked 4 hours ago -
In python
class Customer:
def __init__(self, customer_id, last_name, first_name, phone_number, address):
self._customer_id = int(customer_id)
self._last_name =...
asked 4 hours ago -
What is an example of a limitation in implementing a new
ERP system and how it...
asked 4 hours ago -
In a section of 9.7cm of an artery with a radius of 2.6mm there
is a...
asked 4 hours ago -
the two carboxylic acid groups of aspartic acid have different
acidities with pKa values of 2.1...
asked 4 hours ago -
Would CuCO3 aqueous salt combined with calcium chloride
form a solid precipitate? If so, what would...
asked 4 hours ago