Question

In viscosity experiment, if the liquid density is 1.26 gm /
cm3

The ball density is 2.75 gm / cm3

The radius of the sphere is 0.25 cm r =

Speed of ball cm / s 1.61 v =

Answer #1

Estimate the terminal speed of a wooden sphere (density 0.850
g/cm3) falling through air, if its radius is 8.50 cm and its drag
coefficient is 0.500. (The density of air is 1.20 kg/m3.)

(The experiment is to find the viscosity of the fluid by
dropping the steel ball into the fluid. The steel ball will reach
the terminal velocity and the total time taken to travel in the
fluid was recorded. )
Consider a method of changing the falling velocity of a
steel ball for the same fluid and the same diameter and density
from the viewpoint of drag force.

In addition to the buoyant force, an object moving in a liquid
experiences a linear drag force Fdrag = (bv, direction opposite the
motion), where b is a constant. For a sphere of radius R, the drag
constant can be shown to be b = 6πηR, where η is the viscosity of
the liquid. Consider a sphere of radius R and density ρ that is
released from rest at the surface of a liquid with density ρf.
a. Find an...

A cylindrical tank of radius R is filled with a liquid of
density to a height H above its bottom. It has a small hole of
radius r in the mantle at distance h above its bottom. Air pressure
equals p0. You are to use Bernoulli’s equation to compute the flow
velocity of the fluid as it exits the hole. a) Prepare a diagram.
Indicate the location of the two points that you choose when
applying Bernoulli’s equation. What...

93.
A spherical particle falling at a
terminal speed in a liquid must have the gravitational force
balanced by the drag force and the buoyant force. The buoyant force
is equal to the weight of the displaced fluid, while the drag force
is assumed to be given by Stokes Law,
?s=6????.Fs=6πrηv.
Show that the terminal speed is given by
?=2?2?9?(?s−?1)v=2R2g9η(ρs−ρ1)R
is the radius of the sphere,
?sρs
is its density, and
?1ρ1
is the density of the fluid, and
?η

As part of an experiment in physics lab, small metal ball of
radius r = 2.1 cm rolls without slipping down a ramp and around a
loop-the-loop of radius R = 3.7 m. The ball is solid with a uniform
density and a mass M = 336 g.
1)
How high above the top of the loop must it be released in order
that the ball just makes it around the loop?
m
2)
Now instead of a sphere, what...

You place a sphere of radius R=1.54 m and of density ρ =
0.75g/cm3 in a pool of clean water. The sphere begins to float and
a portion of the sphere begins to show. (a) What is the height of
the portion that shows above the water? What minimum force should
you press on the sphere to make it sink completely in the pool?
Show your complete work step by step.

A ball has a diameter of 3.90 cm and average density of 0.0838
g/cm3. What force is required to hold it completely submerged under
water? magnitude N direction

A ball floats in a tank filled with pure water
(ρwater = 1 g/cm3). The ball has a mass of
0.56 kg and a radius of 12 cm. What is the buoyant force on the
ball?
The buoyant force on the ball, FB =
Find the volume of the water displaced by the ball.
The volume of the displaced water, V =
How much force is needed to apply to the ball to completely
submerged it under the water? What...

The surface area of a ball is measured to be A = 45
cm2.
A) Write an equation for the radius of the ball, r,
treating it as a sphere, in terms of its surface area. ( I tried
square root of A/4pi, didn't work)
B) The mass is measured to be M = 125 g.
Calculate its density ρ in g/cm3.
C)What is the density ρkg/m3 in
kg/m3?

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