Physics Test 2
Statement of Pascal's Principle
"A change in the pressure of a fluid is transmitted uniformly in all directions throughout the fluid."
You exert a force on a lever to lift a rock. If your lever has been shorter, the torque you generated would have been
Less
The specific heat of water is
1 cal/gm °C.
Normal atmospheric pressure measured at sea level measured in Pascals is
101,000 Pascals
If the speed of an object is doubled, its momentum is multiplied by
2
If the distance between a point mass and the pivot point is doubled, the moment of inertia of the object about that point is multiplied by ________
4
If the speed of an object is doubled its kinetic energy is multiplied by ________
4
The lift on airplane wings is explained by
Bernoulli's principle.
Two isolated clay blobs collide & stick together with no mass loss. Which quantity is conserved during the collision?
Momentum
The ideal gas equation of state is
PV = NkT.
The statement that any change in pressure of a fluid is transmitted uniformly, in all directions, throughout the fluid is known as
Pascal's principle.
The International Standard (SI), or metric system, units for pressure are:
Pascals (Pa)
The equation of continuity requires that the product of the velocity of the fluid and the cross-sectional area of a pipe is a constant.
True
The impulse/momentum theorem is a restatement of Newton's Second Law
True
In the case of rotational motion the angular velocity for points on the object
are all the same regardless of the distance from the pivot point
The point in or near an object about which the weight of the object itself exerts no net torque is the
center of gravity
The heat transfer process in which heat flows directly through the material is
conduction.
Bernoulli's principle is a consequence of conservation of
energy.
Pressure is properly defined as
force divided by area.
When two objects at different temperatures are placed in thermal contact, heat flows
from the higher temperature object to the lower temperature object.
When an ice skater who is spinning with his/her arms outstretched draws his/her arms close to his/her body the rate of spin
increases
Increasing the mass of an object without changing its velocity
increases its momentum and its kinetic energy.
According to Archimedes' principle, the buoyant force
is equal to the weight of the displaced fluid.
The principle of conservation of momentum
is valid only if the net external force acting on the system is zero.
A perfectly elastic collision is one in which
kinetic energy is conserved.
Density is defined as
mass divided by volume
The equation of continuity is a consequence of conservation of
mass.
Angular momentum is conserved
only when the net torque acting on the system is zero.
Angular momentum is calculated as the
product of moment of inertia times angular velocity.
The correct units for describing rotational velocity in physics are
rad/s
The first law of thermodynamics states that the increase in internal energy of a system is equal to
the amount of heat added to the system minus the amount of work done by the system.
Torque is calculated as
the applied force times the lever arm.
The impulse/momentum theorem states that the impulse is equal to
the change in momentum.
A perfectly inelastic collision is one in which
the objects stick together after the collision.
At absolute zero
the pressure of an ideal gas is zero.
Boyle's law for an ideal gas at constant temperature states that
the pressure times the volume is a constant.
Kepler's Second Law is a direct consequence of
the principle of conservation of angular momentum.
Impulse is calculated as
the product of the force and the time interval.
The purpose of an airbag in an automobile is
to prolong the time of impact for a given change in momentum thereby reducing the force of impact.
If two children sit on a seesaw and one is twice as heavy as the other, in order to achieve balance the lighter child must sit
twice as far from the fulcrum.
The zeroth law of thermodynamics states that
two objects in thermal equilibrium with each other have the same temperature.