1,302 Answered Questions for the topic physical science

Physical Science Math Science Physics

11/28/20

how much energy (in J) was made unavailable for useful work as a result?
An irreversible process takes place by which the entropy of the universe increases by 1.66 J/K. If the temperature of the environment in which the process occurred is 230 K, how much energy (in J)... more
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Physical Science Math Science Physics

11/28/20

What is the engine's efficiency (in percent)?
As a gasoline engine is running, an amount of gasoline containing 10,200 J of chemical potential energy is burned in 1 s. During that second, the engine does 3,400 J of work.(a)What is the engine's... more
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Physical Science Math Science Physics

11/27/20

how much would the machinist have to lower the temperature (in °C) of the rod to make it fit the hole?
A machinist wishes to insert a steel rod with a diameter of 9 mm into a hole with a diameter of 8.998 mm. By how much would the machinist have to lower the temperature (in °C) of the rod to make it... more
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Physical Science Physics Ap Physics

11/25/20

Why do the coefficients of kinetic and static friction differ?
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Physical Science Math Science Physics

11/25/20

How much longer is it when it contains boiling water at 1 atm pressure?
An aluminum vat is 12 m long at room temperature (20°C). How much longer is it when it contains boiling water at 1 atm pressure?
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Physical Science Math Science Physics

11/25/20

 At what temperature would the wing be 2 cm (0.02 m) shorter?
An aluminum wing on a passenger jet is 28 m long when its temperature is 15°C. At what temperature would the wing be 2 cm (0.02 m) shorter?
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Physical Science Math Science Physics

11/25/20

What is its change in internal energy?
Air in a balloon does 57 J of work while absorbing 98 J of heat. What is its change in internal energy?
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Physical Science Math Science Physics

11/25/20

What is the total mass (in kg) of water vapor in the air in the apartment?
An apartment has the dimensions 15 m by 8 m by 5 m. The temperature is 25°C, and the relative humidity is 57 percent. What is the total mass (in kg) of water vapor in the air in the apartment?
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Physical Science Math Science Physics

11/25/20

What is the engine's efficiency (in percent)?
As a gasoline engine is running, an amount of gasoline containing 10,200 J of chemical potential energy is burned in 1 s. During that second, the engine does 3,400 J of work.(a)What is the engine's... more
Follows • 1
Expert Answers •1
Physical Science Science Physics

11/25/20

how much energy (in J) was made unavailable for useful work as a result?
An irreversible process takes place by which the entropy of the universe increases by 1.66 J/K. If the temperature of the environment in which the process occurred is 230 K, how much energy (in J)... more
Follows • 2
Expert Answers •1
Physical Science Math Science Physics

11/25/20

how much would the machinist have to lower the temperature (in °C) of the rod to make it fit the hole?
A machinist wishes to insert a steel rod with a diameter of 9 mm into a hole with a diameter of 8.998 mm. By how much would the machinist have to lower the temperature (in °C) of the rod to make it... more
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Expert Answers •1
Physical Science Science Physics

11/22/20

How far below the surface of the water is the boat's bottom when it is floating in water?
A boat (with a flat bottom) and its cargo weigh 5,600 N. The area of the boat's bottom is 9 m2. How far below the surface of the water is the boat's bottom when it is floating in water?
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Physical Science Science Physics

11/22/20

What is the mass of the helium (in kg)?
A large balloon used to sample the upper atmosphere is filled with 335 m3 of helium. What is the mass of the helium (in kg)?
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Physical Science Science Physics

11/22/20

What volume did the hydrogen occupy?
The total mass of the hydrogen gas in the Hindenburg zeppelin was 18,000 kg. What volume did the hydrogen occupy? (Assume that the temperature of the hydrogen was 0°C and that it was at a pressure... more
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Physical Science Math Science Physics

11/21/20

What is the buoyant force exerted on it by the air?
An empty storage tank has a volume of 8,000 ft3. What is the buoyant force exerted on it by the air? (Assume the air is at 0°C and 1 atm.)
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Physical Science Math Science Physics

11/21/20

What is the gauge pressure at this depth?
The depth of the Pacific Ocean in the Mariana Trench is 36,198 ft. What is the gauge pressure at this depth?
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Physical Science Math Science Physics

11/21/20

Find the gauge pressure (in psi) at the bottom of a freshwater swimming pool that is 17.4 ft deep.
Find the gauge pressure (in psi) at the bottom of a freshwater swimming pool that is 17.4 ft deep.
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Physical Science Math Science Physics

11/21/20

What is the mass of the helium (in kg)?
A large balloon used to sample the upper atmosphere is filled with 335 m3 of helium. What is the mass of the helium (in kg)?
Follows • 1
Expert Answers •1
Physical Science Math Science Physics

11/21/20

What volume did the hydrogen occupy?
The total mass of the hydrogen gas in the Hindenburg zeppelin was 18,000 kg. What volume did the hydrogen occupy? (Assume that the temperature of the hydrogen was 0°C and that it was at a pressure... more
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Expert Answers •1
Physical Science Science Physics

11/20/20

What volume did the hydrogen occupy?

The total mass of the hydrogen gas in the Hindenburg zeppelin was 18,000 kg. What volume did the hydrogen occupy? (Assume that the temperature of the hydrogen was 0°C and that it was at a pressure... more
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Physical Science Math Science Physics

11/20/20

What is the average difference in the air pressure between the top and bottom of the wing?
The wing of an airplane has an average cross-sectional area of 11 m2 and experiences a lift force of 72,000 N. What is the average difference in the air pressure between the top and bottom of the... more
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Physical Science Math Science Physics

11/20/20

How much soybean oil must the bowl displace in order to float?
A metal bowl with a weight of 1.25 N is placed in a larger kitchen container filled with soybean oil. How much soybean oil must the bowl displace in order to float? For reference, the mass density... more
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Physical Science

11/19/20

Sally snail: Physics
Sally snail travels for a long 16 hours to reach a nice juicy piece of lettuce what speed is she traveling at?
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Physical Science Science Physics Physics B

11/18/20

Angular momentum urgent help
a solid disk of mass m1 = 8.5 kg and radius R = 28 cm is rotating with a constant angular velocity of ω = 28 rad/sec. A thin rectangular rod with mass m2 = 3.5 kg and length L = 56 cm begins at... more
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Physical Science Science Physics Physics B

11/18/20

rotating block on table URGRNT HELP

A small block of mass 1.07 kg slides without friction on a horizontal table. Initially it moves in a circle of radius R0 = 0.57 m with a speed 1.4 m/s. It is held in its path by a string that... more
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