4,347 Answered Questions for the topic Science

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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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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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)?
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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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Science Physics

11/21/20

physics question
A downward-moving skydiver, who has just opened the parachute, is slowing down.The mass of the skydiver is 87 kg.The air resistance force is 1156 N.What is the net force, and in which... more
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Science Physics

11/21/20

physics question
A sledder has reached the bottom of a hill and is coasting to the right while slowing down along the loosely-packed snow. Ignore air resistance.The frictional force is -45 N.The sledder slows down... more
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11/21/20

Help me work out density please!!
If you dissolve 52.5 g of salt in 3.45 l of water, what is the density of that solution of salty water? In this particular example, assume that the total volume doesn’t change when salt is added to... more
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Science Chemistry

11/20/20

chemistry/thermodynamics/calorimetry
A 2.50 g sample of powdered zinc is added to 100.0 mL of a 2.00 M aqueous solution of hydrobromic acid in a calorimeter. The total heat capacity of the calorimeter and solution is 448 J/ºC . The... more
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11/20/20

calorimetry / thermodynamics problem

Potassium nitrate, KNO3, has a molar mass of 101.1 g/mol. In a constant-pressure calorimeter,  26.5g of KNO3 is dissolved in 243 g of water at 23.00ºC.KNO3 (s) → K+ (aq) + NO3- (aq)The temperature... more
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Science Physics

11/20/20

the physics question confuses me
The cabin of a small freight elevator is secured to a motor by a cable and is moving upward with a constant speed. There is no contact between the cabin and the elevator shaft. Ignore air... more
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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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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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Science Math Physics Algebra

11/20/20

Compute the speed of the air flowing into the room (in ft/s), assuming that we can treat the air as an incompressible fluid.
Air flows through a heating duct with a square cross-section with 6-inch sides at a speed of 5.9 ft/s. Just before reaching an outlet in the floor of a room, the duct widens to assume a square... more
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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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Science Chemistry Physics

11/19/20

Physics Momentum and Impulse
What is the impulse of an object Whose momentum went from 300kg*m/s to 3000 kg*m/swhat is the net force on an object when the impulse is 198,000kg*m/s for 3600 seconds
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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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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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Science Chemistry

11/17/20

Delta Hvap for water is 40.7 kJ/mol. Calculate the boiling point of water at 0.500 atm.
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11/17/20

Knowing that ∆Hvap for water is 40.7 kJ/mol, calculate Pvap of water at 37°C
I had gotten the answer 6.90 torr, but the correct one says ita 52.6 torr.. Confused about what I had done wrong!
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Science Math

11/17/20

A car traveled at 50 km/hr for 3 hours. How far did the car travel?
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11/17/20

If I have a 12% solution of hydrogen peroxide (2 cups) and dilute it with 1 cup water, what is the new percentage?
I'm actually doing a lab, this isn't a textbook problem (college bio)
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11/16/20

Another Science question
"Perform the following sequence of operations, applying significant rules: Dr. Sormunen's head weighs 5.05 kg. When Dr. Sormunen places his head in a graduated bucket, the water level rises from... more
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11/16/20

What does protein degradation meaning ?
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11/16/20

Which proteins protects skeletal muscle from injury ?
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11/15/20

What is the buoyant force on it (in lb)? (Enter the magnitude.)
An ebony log with volume 13.4 ft3 is submerged in water. What is the buoyant force on it (in lb)? (Enter the magnitude.)
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