Question

You make a cubic hole with sides of length d in the center of one of the sides of a homogeneous cube wih sides of length L

a) Find the center of mass of the cube with the hole.

Answer #1

A 7.24 ?C point charge is at the center of a cube with sides of
length 0.450 m .
a) What is the electric flux through one of the six faces of the
cube??
b)How would your answer to part A change if the sides were of
length 0.250 m ?
c) Explain

Imagine that one drilled a very small hole with smooth sides
straight through the center of a charged sphere with total charge
Q, radius R and uniform charge density p. A charge −? with mass ?
is dropped into one end. Ignore effects from friction and
gravity.
a. (10 points) The Coulomb force on an object of charge −?
located inside the sphere a distance ? < ? from the center is
due only to the charge that lies within...

Find H ⃑ in the center of a rectangular loop whose sides have
length L, if a current I flows in the counter-clockwise direction
through the loop. The loop has its center at the origin of a
Cartesian coordinate system

The U.S.S. Enterprise (NCC‑1701) approaches an unknown system with
a Black Hole at the center. One of the planets in this system is
observed to have an orbit with a radius of R1 = 2.6 AU
and a period of T1 = 0.4 years. What is the mass of the
Black Hole compared to the mass of the Sun?
The mass 109.81 solar mass
Another planet in the system is observed to have an
orbital radius of R2 = 6.6...

A cube with a side length of 2 meters was placed at the origin
point (Center of the cube at the origin). There is also a point
load at the 8 corners of the cube. Q, which is the value of point
loads, is equal to the sum of the coordinate values of that point.
(Q = x + y + z)
a) Find the electric field and coulomb potential at the origin
and at any point in space.
b)...

A copper cube has a mass of 87.2g. Find the length of
one edge of the cube.

1.
what is singularity
a. place where you could leave universe
b. center of black hole , infinite density
c. we dont know
2. summarize the varios ways stars (law mass and high mass )
could die and describe them .

A steel and aluminum wire, each of length L and diameter d, are
joined to make a single wire of length 2L and diameter d. The wire
is attached to fixed supports so that it is straight but with
negligible tension. After being cooled by a change in T, the
aluminum is found to have increased in length by 0.0140% (and the
steel decreased in length by the same percentage.) If d = 1.00 mm,
find: (a) the difference in...

Problem 8.3. Cube Floating in Water
A block of unknown material is floating in a bucket of water so
that exactly one third of the block is above the water line and the
remainder is below. The block is a cube with sides of length L.
a.) Without calculation, what can you say about the density of
the block compared to the density of the water, i.e, is it greater
than or less than?
b.) What is the volume of...

A uniform rod of mass M and length L is pivoted at one
end. The rod is left to freely rotate under the influence of its
own weight. Find its angular acceleration α when it makes
an angle 30° with the vertical axis. Solve for M=1 Kg, L=1 m,
take g=10 m s-2. Hint: Find the center of mass for the rod, and
calculate the torque, then apply Newton as τ= Ι·α

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