An object has a weight of 7.2 N in air. However, it apparently
weighs only 3.9...
An object has a weight of 7.2 N in air. However, it apparently
weighs only 3.9 N when it is completely submerged in water. What is
the density of the object?
Why does the weight of an object in the air differ from its
weight in a vacuum (remembering that weight is the force exerted
against a supporting surface)? Cite an example in which this would
be an important consideration.
An object that weighs 1180 N rests on a lever at a point 0.370 m
from a support. On the same side of the support, at a distance of
3.00 m from it, an upward force with magnitude F is applied. Ignore
the weight of the board itself. If the system is in equilibrium,
what is F? Express your answer in Newtons. where P = 1180 and x =
0.370. N
An ore sample weighs 17.50 N in air. when the sample is suspended by a light cord and totally immersed in water the tension in the cord is 11.20 N.
Find the total volume and density of the sample.
It is said that Archimedes discovered the buoyancy laws when asked by King Hiero of Syracuse to determine whether his new crown was pure gold (SG = 19.3). Archimedes measured the weight of the crown in air to be 11.8 N and its weight in water to be 10.9 N. Was it pure gold?
A beaker, filled to the very topwith water, weighs 15 N. A 300 g
weight is carefully dropped intothe beaker. The water that
overflows is wiped away and the beakerreweighed. It weighs 16.9 N.
What is the densityof the weight? [Use g=9.8m/s2.]
Hint: The netforce on the bottom of the beaker after the weight is
lowered tothe bottom is (the weight of the reduced volume of water)
+ (300 gweight).
Thebeaker is refilled to the top with
water and a...
The weight of a 0.6 kg object at the surface of Planet V is 20
N. The radius of the planet is 4 X 106 m. Find the
gravitational acceleration at a distance of 2.0 X 106 m
from the surface of this planet.
9 m/s2
13 m/s2
14.8 m/s2
11 m/s2
1) Object "A" has twice the weight of object "B" at a given
point on the moon's surface. "A" must have twice the mass of
"B". True or False
2) The two objects above are moved to Mars. At the same place on
the surface of Mars, the weight of "A" will be twice that of
"B." True or False
3) For a given object composed of a known material on a known
surface, the coefficient of kinetic friction is usually
expected to...
(a) Apparently Hong Kong's linked exchange rate system has an
automatic adjustment mechanism,. However, a substantial selling of
Hong Kong dollars create problem to the linked exchange rateand the
banking system. Why? Explain in detail. (12 mark)
(b) Is monetary policy or fiscal policy more effective under a
fixed exchange rate system? Explain your answer. ( 13 marks)
N players are bidding on an object in a first price
auction. The object has a value of vi for
each player i, where v1 > v2> ...
>vn> 0. Each player bids secretly choosing
nonnegative real number. The winner is the player who bids the
largest number, and that player must pay the amount they bid. If it
tie, then the player with the lowest index wins. Formulate
this situation as a strategic game( describe the players, actions,
and...