4,374 Answered Questions for the topic Science

12/02/20

How do scientists perform intercellular colonization of non-leguminous plants by rhizobia? How do they make the bacteria enter the said plants?
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Science Physics

12/01/20

physics question - answer is 233 N but idk how to do this
A more aggressive snowboarder decides that rain is perfectly OK. She goes up to Snoqualmie Pass to board down the slopes in the rain. The angle of the slope is 36.0°. She is sliding down the... more
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Science Physics

12/01/20

physics question
A block of mass 10 kg slides down an inclined plane elevated 30◦ to the horizontal. If the coefficient of kinetic friction is 0.6, find the acceleration of the block.
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Science Biology

11/30/20

Question about osmosis

How does placing carrots in water keep them crisp and fresh? Explain using the words solute, water, hypertonic, hypotonic, and isotonic.
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11/30/20

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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11/30/20

 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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11/30/20

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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11/30/20

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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Science Botany Plant Plants

11/30/20

bryophytes ( mosses, liverworts, ferns)
Fill in the following  to compare mosses, liverworts and fernsCapsule formcolumelladehiscencedispersion of sporesgrowthmaturation of sporespersistencesetastomataplease put your references thank you... more
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Science Math Physics

11/30/20

A student is pulling a 15 kg cart up a ramp with a rope that is parallel to the surface of the ramp.

A student is pulling a 15 kg cart up a ramp with a rope that is parallel to the surface of the ramp. If the ramp is angled at 25 degrees, calculate the following:Draw the FBD for this... more
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Science Biology

11/28/20

meiosis what types of cells?
A. Identical sperm and egg cells B. Unidentical sperm and egg cells c. Identical body cells d. Unidentical body cells
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Science Physics

11/28/20

Physics question
A car has a mass of 1020 kg and has a coefficient of static friction between the ground and its tires of 0.85. What force of friction can it exert on the ground? What is the maximum acceleration... more
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11/28/20

At what temperature would the wing be 2 cm (0.02 m) shorter?
An aluminum wing on a passenger jet is 28 mlong when its temperature is 15°CAt what temperature would the wing be 2 cm (0.02 m) shorter?
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11/28/20

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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Expert Answers •1

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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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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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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Science Physics

11/27/20

Physics question
A box takes 350 N to start moving when the coefficient of static friction is 0.35. What is the mass of the box? m = 101.94 kgIdk how to do this prob
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11/26/20

What is the concentration and yield of the extract?
Undiluted extract: 1.71/5 dilution of extract: 0.82½ dilution of the 1/5 dilution: 0.49
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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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Expert Answers •1

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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Expert Answers •1

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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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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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
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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
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