Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Physical Science
Homework 6
| Question | Answer |
|---|---|
| If a loaf of bread is compressed, its | Density increases |
| When a chocolate bar is cut in half, its density is | Unchanged |
| The density of air at room temperature is about 0.0012 grams/cm3. Estimate the mass of air inside an average automobile. | 2 kg |
| If the volume of an object were to double with no change in mass, its density would | Be half |
| When you stand on tiptoes on a bathroom scale, there is an increase in | Pressure on the scale, not registered as weight |
| The pressure in a liquid depends on liquid | Depth and density |
| Water pressure is greatest against the | Bottom of a submerged object |
| Blood pressure is normally greater in your | Feet |
| There is a legend of a Dutch boy who bravely held back the Atlantic Ocean by plugging a leak near the top of a dike with his finger until help arrived. Which of the following is most likely? | The force on his finger would have been less than 1 N |
| Pumice is a volcanic rock that floats. Compared with the density of water, its density is | Less |
| A completely submerged object always displaces its own | Volume of fluid |
| A fish normally displaces its own | Volume and weight of water |
| What is the buoyant force acting on a 10-ton ship floating in the ocean? | 10 tons |
| What is the buoyant force acting on a 10-ton ship floating in a fresh-water lake? | 10 tons |
| Buoyant force acts upward on a submerged object because | Pressure up on bottom is greater than downward pressure on top of the object |
| The reason a life jacket helps you float is that | The combined density of you and the jacket is less than your density alone |
| Lobsters live on the bottom of the ocean. Compared with the density of seawater, the density of a lobster is | Greater |
| A lobster crawls onto a bathroom scale submerged on the ocean bottom. Compared to its weight above the surface, its apparent weight under water is | Less |
| Two life preservers have identical volumes, one filled with Styrofoam and the other filled with sand. When both life preservers are fully submerged, the buoyant force is greater on the one filled with | Same on each if the volumes remain the same |
| Compared with an empty ship, the same ship loaded with Styrofoam will float | Lower in the water |
| Buoyant force is greatest on a submerged 1 cubic centimeter block of | Same on each |
| If a battleship sinks in a canal lock, the water level in the lock | Falls |
| When an ice cube in a glass of water melts, the water level | Remains the same |
| Compared to the buoyant force on you when floating in fresh water, buoyant force on you when floating in the dense water of the Dead Sea is | The same |
| The product of gas pressure and volume for a given mass of gas is constant | If the temperature doesn't change |
| When gas in a container expands to twice its volume, its density | Is half |
| Strictly speaking, gas pressure inside an inflated stretched balloon is | Slightly greater than the pressure outside the baloon |
| How deep must an inverted drinking glass be pushed beneath the surface of water so that the volume of enclosed air is squeezed to half? | 10.3m |
| A swimmer cannot snorkel more than a meter deep because air | At the surface will not freely enter the higher-pressure region in the compressed lungs. |
| Atmospheric pressure is caused by the | Weight of the atmosphere |
| The air in this room has | Energy, weight, and mass |
| When a suction cup sticks to a wall it is | Pushed to the wall by the atmosphere |
| It would be easier to pull evacuated Magdeburg hemispheres apart if they were | 2 km above the ocean surface |
| A change in pressure at any point in a confined fluid at rest is transmitted | undiminished to all points in the fluid |
| If a pressure of 20 kPa is applied to one piston in a simple hydraulic device, the pressure on a piston of larger area will be | The same 20 kPa |
| Very importantly, a hydraulic press can multiply | Forces |
| A rising balloon is buoyed up with a force equal to the | Weight of air it displaces |
| A bubble of air released from the bottom of a lake | Becomes larger as it rises |
| Compared with the buoyant force of the atmosphere on a 1-L helium-filled balloon, the buoyant force of the atmosphere on a nearby 1-L solid iron block is | The same |
| A 1-ton blimp hovers in air. The buoyant force acting on it is | 1 ton |
| An empty jar is pushed open side downward into water so that air trapped inside can't escape. As it is pushed deeper, the buoyant force on the jar | Decreases |
| As water in a confined pipe speeds up, the pressure it exerts against the inner walls of the pipe | Decreases |
| Airplane lift is achieved when air pressure on the bottom of a wing is | Greater than the pressure on top |
| Suspend a pair of Ping-Pong balls from two strings so there is a small space between them. If you blow air between the balls, they will swing | Toward each other |
Created by:
akozlowski