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Physical Sciences
Page 7
Questions (453)
Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.80 x 10^11 m apart. The
2 answers
asked by
Anne
706 views
For how long must a current of 1.5 ampares be passed through an aqueous solution of a copper salt .during electrolysis in order
3 answers
asked by
Anita
698 views
Martin and Patrick have a model of an airplane which they want to duplicate. Martin uses a string and ruler to make approximate
1 answer
asked by
Anonymous
661 views
How do the principles of physics and chemistry both come into play when developing new materials
1 answer
asked by
long
632 views
Two samples of water of equal volume are put into two dishes and kept at room temperature for several days. The water in the
2 answers
asked by
Brian
642 views
Calculate the heat released when 3.10 L of Cl2(g) with a density of 1.88 g/L reacts with an excess of sodium metal at 25°C and
3 answers
asked by
mylles
658 views
is this the right anser? for this problem please let me know thanks
calculate the amount of heat in kilojoules released when 50
2 answers
asked by
Joshua
653 views
How much energy is required to change a 40 g ice cube from ice at -40°C to steam at 100°C?
2 answers
asked by
Erica--help!
649 views
Assume that you have a liquid in a cylinder equipped with a movable piston. There is no air in the cylinder, the volume of space
1 answer
asked by
Sci Guy
641 views
The diffusion coefficient of silver (Ag) in copper (Cu) has the following values:
T (K) D (m2s-1) 923 5.42 x 10-16 1173 1.34 x
5 answers
asked by
student
639 views
Calculate the heat released from 61.5 g of steam at 111 degrees C is converted to water at 39 degrees C. Assume the specific
1 answer
asked by
Phil
631 views
6. A quantity that is described by both magnitude and direction is called a __________.
magnitude vector reference point scalar
2 answers
asked by
Ryder C.
621 views
A 13 gram sample of an unknown metal at 26.5°C is placed in a Styrofoam cup containing 50.0 grams of water at 88.6°C. The
2 answers
asked by
Ehab
616 views
When salt is spread on a snow-covered road at -2C, the snow melts. Though when the same amount of salt is spread on the snow
3 answers
asked by
Sammy
618 views
What happens to the physical properties as the strength of intermolecular forces increases?
2 answers
asked by
nurul
587 views
Which size is correct about petroleum and natural gas
1 answer
asked by
Ai help
13 views
All of the following are true EXCEPT;
A. the n=4 energy level has no f orbitals B. the 2p orbitals can have a maximum if 6
3 answers
asked by
Lauren
603 views
how to find approximate effective nuclear charge felt by the valence electrons of an element. please help. thank you
2 answers
asked by
Tatiyana
573 views
How do conduction and convection differ?
My answer was: Conduction requires objects to have direct physical contact, convection
2 answers
asked by
Dylan
591 views
A rubber balloon was filled with helium at 25˚C and placed in a beaker of
liquid nitrogen at -196˚C. The volume of the cold
2 answers
asked by
Dia B
583 views
Two natural gas storage tanks, with volumes
of 1.5 x 104 and 2.2 x 104L, are at the same temperature. The tanks are connected by
2 answers
asked by
Michael
562 views
A sample of gas at 42°C has a volume of 5.2 L and exerts a pressure of 1.00 atm. How many moles of gas are in the sample?
2 answers
asked by
jackson
565 views
xplain why the value of the band gap energy, Eg, decreases in the following homologous series:
Cdiamond=5.4 eV; Si=1.1 eV;
4 answers
asked by
Ankur
569 views
A glass of ice water was made by adding six 25 g ice cubes to one liter of water. If the water was initially 25C and the ice
2 answers
asked by
Jessica
559 views
Please help!
Suppose that a 400 gram copper object (specific heat 0.092 cal/g/degrees Celsius) receives 900 cal. of heat. What is
3 answers
asked by
A
549 views
What is the volume occupied by 0.252mol of helium gas at 1.35atm and 305K ?
2 answers
asked by
Anon
535 views
For this investigation, is it the Battery or the Coils of Wire carrying a current that are behaving like a magnet? (Hint: Use
1 answer
asked by
guap
51 views
Does the application of heat to a substance always produce a chemical change? And give examples to support your answer.can
2 answers
asked by
Jackie
539 views
the thermochemical equation for th edissocation of hydrogen gas into atoms may be written :
h2-> 2H delta H 1824.2 what is the
5 answers
asked by
Court
534 views
How many liters is 5.8 moles of neon (Ne) at STP?
2 answers
asked by
Kody
528 views
Suppose a 65-kg person can run 1000m in 5min. Assume that each stride is 1.5m long, and with each stride the runner must supply
2 answers
asked by
Hayli
549 views
When 86.7 g of water at a temperature of 73 °C is mixed with an unknown mass of water at a temperature of 22.3 °C the final
2 answers
asked by
Anonymous
529 views
Water has a van der Waals constants of a = 5.464 L·atm/mol2 and b = 0.03049 L/mol. What is the pressure of 5.20 moles of water
2 answers
asked by
Kerrie
522 views
In a game against the White Sox, baseball pitcher Nolan Ryan threw a pitch measured at 34.4 m/s. If it was 18.4 m from Nolan's
2 answers
asked by
chris
557 views
On average, how far is a molecule of air in the room in which you're sitting from the nearest molecule of air to it, assuming it
2 answers
asked by
eric
523 views
A 15.0 g of sample of silver is heated to 100.0 0C and then placed in a constant-pressure calorimeter containing 25.0 g of water
2 answers
asked by
Luke
531 views
A 156.5 g piece of stainless steel was heated to 510 C and quickly added to 25.11 g of ice at -30 C in a well-insulated flask
4 answers
asked by
Jerry
523 views
The heat energy of ethanol is 29800J/g. A 355g can of beer contains 3.70% ethanol by mass. How many ethanol calories are in a
2 answers
asked by
Kayla
522 views
the basic unit of mass in the metric system
2 answers
asked by
ST
501 views
how much heat is required when 6.00g of water is melted at its melting point
3 answers
asked by
chelsea
493 views
A 100g sample of water absorbs 308kJ of heat. If the water was initially at -10 degrees Celsius, what is its final temperature?
3 answers
asked by
Homework Help:
522 views
Name five distinct disciplines of physical sciences
2 answers
asked by
Physics
486 views
A fisherman in a boat is drinking a cup of hot coffee. The large lake below his boat is full of cold water. Which statement is
1 answer
asked anonymously
132 views
Derive an expression for escape speed of satellite.
2 answers
asked by
Abidur
531 views
which description depicts a real scenario?
the amount of air in a tire the temperature of an ice cube taken out of the freezer
1 answer
asked anonymously
61 views
What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?
2 answers
asked by
Savannah
493 views
For the following fusion reaction, calculate the change in energy per mole.
2/1 H + 3/2 He -> 4/2 He + 1/1 H
2 answers
asked by
Anonymous
519 views
What is the barometric pressure of water at 23.2 C, perferably in atm. Thank you.
2 answers
asked by
anonymous
487 views
What happens to a 4L volume of gas as you change the pressure from 6 atm to 760 torr? What law was used, and show work
2 answers
asked by
Kris
475 views
A 19.5-g sample of a metal was heated to 61.67°C. When the metal was placed into 27.1 g of water in a calorimeter, the
1 answer
asked by
Lance
487 views
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