PY 131 EXAM 2 QUESTIONS AND
ANSWERS 100% CORRECT
the faster a fluid moves - ANSWER the less its internal pressure
the buoyant force on a rock is least when the rock is submerged - ANSWER anywhere
(near bottom, halfway down, near surface, it does not matter as long as its submerged)
an object is placed exactly halfway between the earth and the sun, the object will fall
toward the - ANSWER sun
when an iron ring is heated, the hole becomes - ANSWER larger
a black hole is - ANSWER simply the remains of a giant star that has undergone
gravitational collapse
inside a freely-falling elevator, there would be no - ANSWER apparent weight for you
The cooling effect inside a refrigerator is produced by - ANSWER vaporizing the
refridgeration liquid
a completely submerged object always displaces its own - ANSWER volume of fluid
Newton's law of cooling applies to objects that are - ANSWER heating and cooling
when an object is partly or wholly immersed in a liquid, it is buoyed up - ANSWER by a
force equal to the weight of liquid displaced
, an asteroid exerts a 160-N gravitational force on a nearby spacecraft. if the spacecraft
moves to a point 4 times as far from the center of the asteroid, the force will be -
ANSWER 10 N (gravitational force is about 1/d^2)
if the sun were twice as massive - ANSWER both its pull on earth would double and the
pull of the earth on the sun would double
when water at 4 degrees C is heated it expands, when water at 4 degrees C is cooled, it
- ANSWER expands
a bullet fired horizontally over level ground hits the ground in 0.5 second. If it had been
fired with 10 times the speed in the same direction, it would have hit the ground in -
ANSWER 0.5 seconds
after the semester you throw you clicker straight up. when it reaches its maximum
height the velocity is zero and the acceleration is - ANSWER -10m/s/s
a lobster crawls onto a bathroom scale submerged at the bottom of the ocean.
Compared to its weight above the surface of the ocean, the lobster will have an
apparent weight under water that is - ANSWER less
near the top of a mountain, water in an open pot boils at - ANSWER a lower temperature
than at sea level
when heat is added to boiling water, its temperature - ANSWER does not change
without air resistance, a projectile fired horizontally at 8 km/s from atop a mountain will -
ANSWER return later to its starting position and repeat its falling behavior, accelerate
downward at g as it moves horizontally, trace a curve that matches the earth's
curvature
If the volume of an object were to double while its mass stays the same, its density
would - ANSWER half
ANSWERS 100% CORRECT
the faster a fluid moves - ANSWER the less its internal pressure
the buoyant force on a rock is least when the rock is submerged - ANSWER anywhere
(near bottom, halfway down, near surface, it does not matter as long as its submerged)
an object is placed exactly halfway between the earth and the sun, the object will fall
toward the - ANSWER sun
when an iron ring is heated, the hole becomes - ANSWER larger
a black hole is - ANSWER simply the remains of a giant star that has undergone
gravitational collapse
inside a freely-falling elevator, there would be no - ANSWER apparent weight for you
The cooling effect inside a refrigerator is produced by - ANSWER vaporizing the
refridgeration liquid
a completely submerged object always displaces its own - ANSWER volume of fluid
Newton's law of cooling applies to objects that are - ANSWER heating and cooling
when an object is partly or wholly immersed in a liquid, it is buoyed up - ANSWER by a
force equal to the weight of liquid displaced
, an asteroid exerts a 160-N gravitational force on a nearby spacecraft. if the spacecraft
moves to a point 4 times as far from the center of the asteroid, the force will be -
ANSWER 10 N (gravitational force is about 1/d^2)
if the sun were twice as massive - ANSWER both its pull on earth would double and the
pull of the earth on the sun would double
when water at 4 degrees C is heated it expands, when water at 4 degrees C is cooled, it
- ANSWER expands
a bullet fired horizontally over level ground hits the ground in 0.5 second. If it had been
fired with 10 times the speed in the same direction, it would have hit the ground in -
ANSWER 0.5 seconds
after the semester you throw you clicker straight up. when it reaches its maximum
height the velocity is zero and the acceleration is - ANSWER -10m/s/s
a lobster crawls onto a bathroom scale submerged at the bottom of the ocean.
Compared to its weight above the surface of the ocean, the lobster will have an
apparent weight under water that is - ANSWER less
near the top of a mountain, water in an open pot boils at - ANSWER a lower temperature
than at sea level
when heat is added to boiling water, its temperature - ANSWER does not change
without air resistance, a projectile fired horizontally at 8 km/s from atop a mountain will -
ANSWER return later to its starting position and repeat its falling behavior, accelerate
downward at g as it moves horizontally, trace a curve that matches the earth's
curvature
If the volume of an object were to double while its mass stays the same, its density
would - ANSWER half
