# Two people, one of mass 85 kg and the other of mass 50 kg, sit in a rowboat of mass 90 kg. With the boat initially at rest, the two people, who have been sitting at opposite ends of the

48,999 questions
1. ## physics

Two people, one of mass 70 and the other of mass 65 , sit in a rowboat of mass 78 . With the boat initially at rest, the two people, who have been sitting at opposite ends of the boat, 3.5 apart from each other, now exchange seats.

asked by anonymous on February 6, 2011
2. ## physics

Two people, one of mass 85 kg and the other of mass 50 kg, sit in a rowboat of mass 90 kg. With the boat initially at rest, the two people, who have been sitting at opposite ends of the boat, 3.5 m apart from each other, now exchange seats. How far does

asked by homcahbiec on May 19, 2011
3. ## Math

Six people are going to sit in a row on a bench. Romeo wasnts to sit next to Juliet. Caesar does not want to sit next to Brutus. Homer and Pierre can sit anywhere. In how many ways can these people be seated?

asked by Sarah on October 2, 2012

Two people, one of mass 51.4KG and the other mass of 78.0 KG, sit a distance between of 2.3 metres apart on a low friction sleds with the same friction coefficients. A)what is the strength of the gravitational force between them? B) suppose the friction is

asked by Sohaib on January 21, 2017
5. ## Physics

When four people with a combined mass of 320 kg sit down in a car, they find that the car drops 0.80 cm lower on its springs. Then they get out of the car and bounce it up and down. What is the frequency of the car's vibration if its mass (when it is

asked by Y0gi on December 7, 2010
6. ## PHYSICS

WHEN SIX PEOPLE WHOSE AVERAGE MASS IS 84 KG SIT DOWN IN A CAR, THEY FIND THAT THE CAR DROPS .84 CM LOWER ON ITS SPRINGS. THEN THEY HAVE GET OUT OF THE CAR AND BOUNCE IT UP AND DOWN. THE ACCELERATION OF GRAVITY IS 9.8 M/S^2. WHAT IS THE FREQUENCY OF THE

asked by KOCHU on January 13, 2013
7. ## Physics

Two boys each of mass 10kg sit at a distance 1.5metres from a pivot of a seasaw. If another boy of mass 30kg sit at the distance 1.0metres from the pivot, would the seasaw balance horizontally?

asked by Ande2 on November 7, 2018
8. ## physics

When four people with a combined mass of 320 kg sit down in a car, they find that the car drops .80 cm lower on its springs. THen they get out of the car and bounce it up and down. What is the frequency of the car's vibration if its mass (empty) is 2.0 X

asked by sam on March 15, 2007
9. ## physics

The CM of an empty 1300 kg car is 2.40 m behind the front of the car. How far from the front of the car will the CM be when two people sit in the front seat 2.80 m from the front of the car, and three people sit in the back seat 3.80 m from the front?

asked by Anonymous on March 14, 2010
10. ## physics

The CM of an empty 1300 kg car is 2.40 m behind the front of the car. How far from the front of the car will the CM be when two people sit in the front seat 2.80 m from the front of the car, and three people sit in the back seat 3.80 m from the front?

asked by Anonymous on March 11, 2010

The CM of an empty 1170 kg car is 2.50 m behind the front of the car. How far from the front of the car will the CM be when two people sit in the front seat 2.8 m from the front of the car, and three people sit in the back seat 3.90 m from the front?

asked by Anonymous on March 9, 2010
12. ## math

Which strategies can be used to solve this problem? Colin invited 31 people to the picnic. He can fit 10 people at his picnic table and the rest will sit on blankets. Each blanket can hold 3 people. How many blankets does Colin need so that everyone has

asked by isaiah on March 9, 2019
13. ## Physics

Four people sit in a car. The masses of the people are 41 kg, 47 kg, 53 kg, and 55 kg. The car's mass is 1020 kg. When the car drives over a bump, its springs cause an oscillation with a frequency of 1.00 Hz. What would the frequency be if only the 41-kg

asked by Priyanka on March 30, 2012
14. ## Math

8 people are going to sit on 6 chairs. Two of them John and Kelly can't sit next to each other. How many ways can you put the people to seats? The answer is 10080, but I can't figure out how to calculate it.

asked by Helga on April 8, 2014
15. ## Math

The school is having a big event in the gym and wants to use their rectangular tables. 6 people can sit together at one rectangular table. If 2 tables are placed together, 10 people can sit together. So the pattern I noticed is 4 people added whenever a

asked by John Dosley on July 27, 2016
16. ## physics

Two people (from the 1950s!) sit on opposite sides of a uniform board of length L. One person, of mass m1 = 50.0 kg, sits at a point 1.90 m to the left of the fulcrum. The fulcrum is located at the center of the board. The other person, of mass 45.0 kg,

asked by john on October 28, 2014
17. ## science

A 10 meter long seesaw has a boy of mass 20 kg sitting on one end . How far away from him should a girl of mass 30kg sit to balance the seesaw?

asked by Zahra ferdous on January 1, 2015
18. ## Physics??

Two children sit 2.60 m apart on a very low-mass horizontal seesaw with a movable fulcrum. The child on the left has a mass of 29.0 kg, and the child on the right has a mass of 38.0 kg. At what distance, as measured from the child on the left, must the

asked by starry on December 19, 2010
19. ## physics

A boy has a mass 40kg and a girl of mass 30kg play on a see-saw, where must the girl sit to make it balance?

asked by atiyya on November 23, 2016
20. ## physics

A brother (mass 20 kg) and his big sister (mass 32 kg) want to play on a teeter-totter. The beam is 7 m long and has a mass of 41 kg. Suppose the brother sits at the end of his side, 3.5 m away from the pivot point. How far away from the pivot point does

asked by Josh on December 10, 2012

If a person has more mass do they do more work or exert more power? (When walking up the stairs) (Compared to a person with less mass) Am I on the right track? This is what I have so far... The person with most mass does not necessarily do the most work.

asked by Gigi on September 17, 2014
22. ## math

Which strategies can be used to solve this problem? Colin invited 31 people to the picnic. He can fit 10 people at his picnic table and the rest will sit on blankets. Each blanket can hold 3 people. How many blankets does Colin need so that everyone has

asked by April lanneau on March 8, 2019
23. ## Langauge Arts

What is the best paraphrase of the final stanza? A. The water slows until it reaches its destiny, a place not too different from mine, where the water stretches to meet the sky. Other people use it like a mirror. They fish and think here. B. The water

asked by Callie on February 25, 2015
24. ## physics

Suppose all the people of the Earth go to the North Pole and, on a signal, all jump straight up. Estimate the recoil speed of the Earth. The mass of the Earth is 6 1024 kg, and there are about 6 billion people (6 109). Take the average mass of a person to

asked by marcos on February 10, 2012
25. ## physics

Joe has a mass of 50 kg and Sally has a mass of 30 kg. They sit in class with a separation of 0.5 meters. Find the gravitational attraction between Joe and Sally.

asked by Dominique on November 22, 2010
26. ## math

How many ways can 9 people be arranged to sit at a round table if Sam can not sit between Ron and Ed? My solution: 7! Thanks for your help.

asked by Jenna on October 15, 2016
27. ## Chemistry

I recently performed an experiment in which magnesium oxide formed. I have to find out the simplest whole number ratio of Mg atoms to O atoms. How do I go about doing this? * Chemistry - DrBob222, Tuesday, October 13, 2009 at 11:19pm Mass MgO - mass Mg

asked by Anonymous on October 14, 2009
28. ## mathematics

1. Six people sit at a round table. in how many ways can that be done if two of them must sit next to each other?

asked by nnamdi on February 22, 2016
29. ## Physics

A child sits on one side of a teeter totter of length 7.60 m, a distance of 49.7 cm away from the end of the beam. The child has a mass of 21.6 kg. Her mother has a mass of 43.6 kg. How far away from her end does she have to sit in order for the teeter

asked by Cmoney on December 20, 2007
30. ## Physics

A child sits on one side of a teeter totter of length 7.60 m, a distance of 49.7 cm away from the end of the beam. The child has a mass of 21.6 kg. Her mother has a mass of 43.6 kg. How far away from her end does she have to sit in order for the teeter

asked by Courtney on December 17, 2007
31. ## Chemistry

I had a quiz today and one of the multiple choice questions was something like, "find the final temperature of aluminum when it is cooled" and then it gave you the specific heat capacity of aluminum, the mass of the aluminum, initial temperature, and

32. ## physics

A fulcrum is placed under the center of a uniform 4.00m long, 3.00kg board. Child A has a mass of 42 kg. This child sits on the left end of the board; Child B has a mass of 26kg. Child B sits on the right end of the board. Where should child C (mass 21 kg)

asked by Joe on November 4, 2012
33. ## physics

A canoe of mass 38 kg lies at rest in still water. A man and a woman are at opposite ends of the canoe 4.0 m apart and symmetrically located with respect to the canoe’s centre (which is also its centre of mass). The mass of the man is 65 kg and the

asked by Anonymous on April 21, 2013
34. ## physics

A canoe of mass 38 kg lies at rest in still water. A man and a woman are at opposite ends of the canoe 4.0 m apart and symmetrically located with respect to the canoe’s centre (which is also its centre of mass). The mass of the man is 65 kg and the

asked by Anonymous on April 21, 2013
35. ## Physics

19. Two people of unequal mass are initially standing still on the ice with negligible friction. They then simultaneously push each other horizontally. Afterward, which of the following is true? * -The center of mass of the two person system moves in the

asked by Lexie on January 26, 2015
36. ## physics

You know that you can safely stand on the hang-over end of a heavy plank that rests on a table. How far depends on your mass and the mass of the plank. Suppose you can stand on the end of a plank that overhangs the edge of the supporting table 1/4 its

asked by Claire on July 22, 2008
37. ## Physics

A 0.25 mass is located on the outer edge of a wheel of radius 0.75 m that is turning at a rate of 2 revs/s. Determine the following: 1) The period of the mass 2) The angular speed of the mass in rad/s c) The tangential speed of the mass d) The centripetal

asked by Monika on December 13, 2009
38. ## math

5 people took turns to sit in the two seats so that each person had equal time to sit.if the total took 1 hour 10 minutes,how long did each person have the seat for?

asked by wan on October 27, 2012
39. ## statistics

16 people attend party.A party table with,8 chairs on both sides.4 want to sit on one side & 2 want to sit otherside.Find the no of ways this can be arranged.

asked by indu on July 9, 2008
40. ## Chemistry

There are three isotopes of phosphorus. Only one of them is stable. Calculate the binding energy per nucleon (in MeV) for P-32 (atomic mass = 31.9739 u). mass H = 1.007825 u and mass n = 1.008665 u. I multiplied the protons(15) by the mass H, and the

asked by JUNDY on April 30, 2015
41. ## college physics

Arthur (mass 78 kg) and Violet (mass 31 kg) are trying to play on a seesaw. If Violet sits 3.6 m from the fulcrum, at what distance from the fulcrum should Arthur sit?

asked by Alexis on October 13, 2010
42. ## physics

The linear momentum of a body can be calculated by multiplying its mass by the Question 1 options: time during which the mass moves. distance the mass moves. acceleration of the mass. velocity of the mass. Save

asked by nicole pierre on February 10, 2013
43. ## physics

The linear momentum of a body can be calculated by multiplying its mass by the Question 1 options: time during which the mass moves. distance the mass moves. acceleration of the mass. velocity of the mass. Save

asked by nicole pierre on February 10, 2013
44. ## conceptual physics

The linear momentum of a body can be calculated by multiplying its mass by the Question 1 options: time during which the mass moves. distance the mass moves. acceleration of the mass. velocity of the mass. Save

asked by nicole pierre on February 10, 2013
45. ## Calculating Averages?

A certain element has four isotopes. 5.85% of has a mass of 53.93961 . 91.8% of has a mass of 55.934939 . 2.12% of has a mass of 56.93539 . 0.282% of has a mass of 57.93328 . What is the average atomic mass of element ? Express your answer numerically to

asked by Alison on August 29, 2011
46. ## Chemistry

I need to find the average molar mass of an unknown element. The atomic mass is 120; the mass numbers of isotopes are 295, 296, 297, 298 and 299; the percent of each isotope is 2.356%, 4.325%, 15.652%, 48.452% and 29.215%. The mass of the neutron is

asked by Joe on October 13, 2012
47. ## Chemistry

I need to find the average molar mass of an unknown element. The atomic mass is 120; the mass numbers of isotopes are 295, 296, 297, 298 and 299; the percent of each isotope is 2.356%, 4.325%, 15.652%, 48.452% and 29.215%. The mass of the neutron is

asked by Joe on October 14, 2012
48. ## chem

how do you tell which reactant is limiting reactant with the following information: mass of cup 55.78g mass o/sodium bicarbonate 1.01g mass o/citric acid 1.52g toal mass 58.31g mass of cup,solute after reaction 59.95g mass o/carbon dioxide .42g

asked by jo on March 9, 2012
49. ## physics

A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 12 in 9.0 . Assume the merry-go-round is a uniform disk of radius 2.2 and has a mass of 650 , and two children (each with a mass

asked by cara on April 19, 2011
50. ## Physics

A man (mass 120.5 kg) is canoeing with his friend (mass 81.6 kg). He had the only paddle but dropped it in the lake. It has drifted just out of his reach along the long axis of the canoe. His friend suggests that if they trade places he might be able to

asked by Rick on October 20, 2014
51. ## Chemistry

1) The molecular mass of a substance was determined by the freezing point depression technique. The minimum data required for the determination are a. ƒ´Tf and Kf only. b. ƒ´Tf , Kf and mass of solute. c. ƒ´Tf , Kf , mass of solute and mass of

asked by Hannah on February 13, 2012
52. ## Science

What happens to the mass of a sample containing a radioactive element during its half-life? A. The mass decreases by half. B. The amount of mass is doubled. C. Eventually there is no mass at all. D. The mass remains the same.

asked by Kalie on November 17, 2016
53. ## Trigonometry

The diagram below shows a mass, a spring, and a near-frictionless surface. If you pull the mass back 10 cm and then release it, the mass starts to oscillate. The distance of the mass from the wall is modeled by the equation y = 3sin(4pi t + pi/2) + 7 cm,

asked by Tabitha on January 14, 2011

Find the resultant force on (a) the mass m1 = 0.183 kg and (b) the mass m2 = 0.106 kg (the masses are isolated from the earth).. The first mass is 400kg and its 10 cm from the second mass which is 0.183 kg (m1). the second mass is 10 cm away from the third

asked by kellie on September 29, 2011
55. ## Physics

A boy of mass 10kg sits at a distance of 1.5m from the pivot of a see_saw . If another boy of mass 20kg sit at a distance 1m from the pivot,will the see_saw balance horizontally?

asked by Esther on October 28, 2018
56. ## physics

A 6.0 kg mass moves along an inclined plane that makes an angle of 36 degrees with the horizontal. The mass is connected by a cable to a second mass of 10.0 kg, which is suspended over a frictionless, massless, pulley and is free to move. The second mass

asked by Alex on November 22, 2011
57. ## Physics

A spring stretches 0.150 m when a 0.30 kg mass is hung from it. The spring is then stretched an additional 0.100 m from this equilibrium point and released. Determine a). the spring constant, k, b). the maximum velocity of the mass, c. ) the maximum

asked by Lori on February 23, 2013

A spring stretches 0.150 m when a 0.30 kg mass is hung from it. The spring is then stretched an additional 0.100 m from this equilibrium point and released. Determine a). the spring constant, k, b). the maximum velocity of the mass, c. ) the maximum

asked by Lori on February 23, 2013
59. ## physics

Four people, each with a mass of 72.7 kg, are in a car with a mass of 1110 kg. An earthquake strikes. The driver manages to pull of the road and stop, as the vertical oscillations of the ground surface make the car bounce up and down on its suspension

asked by tom on October 16, 2010
60. ## physics

A boy and girl are balanced on a "massless" seesaw. The boy has a mass of 75 kg and the girl a mass of 50kg. The seesaw is 6 meters in lenght with the pivot point between them...What are the distances each child must sit relative to the pivot point?

asked by Joe on November 14, 2015
61. ## physics

Jen sit on chair , the angle of lower leg 30 degree lenhg 40 cm. calculater center of mass

asked by Anonymous on September 5, 2011
62. ## Physics

Hung vertically, a mass less spring extends by 3.00 cm a mass of 739. G is attached to its lower end. The same mass and spring are then placed apart on a table. The spring is fixed in place and then the mass is given a velocity of 0.900 m/s towards the

asked by Steeve on October 18, 2012
63. ## Help me please with physics

A 25kg mass is on a level, rough surface where the force of friction is a constant 15 N. A horizontal applied force of 65 N acts on the mass. The mass is initially at rest. a) what speed does the mass have after 4.0 seconds? b) what speed does the mass

asked by Nicole on October 15, 2010
64. ## Chemistry help emergency? (theoretical mass/mol)

I am supposed to calculate the theoretical mass and moles of Cu. However I am given the mass of 2 reactants in the balanced equation: 3CuCl2*2H2O + 2Al -> 3Cu + 2AlCl3 + 6H2O I am given the mass of CuCl2*2H2O to be 0.477g and the mass of Al is 0.267g. If I

asked by ray on November 1, 2016
65. ## Physics

A mass spectrometer is used to separate isotopes. If the bean emerges with a speed of 374 km/s and the magnetic field in the mass selector is 1.5 T, what is the distance between the collectors for 235U+1 and 238U+1? The mass of 235U+1 is 235 u and the mass

asked by Jane on March 21, 2010
66. ## physics

How can I calculate the tension in the two cords that are labeled A and B in a two mass system? Cord A is on top with a 1 kg mass attached and Cord B connects this mass to a 2 kg mass. The two mass system accelerates directly upward at 2m/s^2.

asked by Josh on November 21, 2009
67. ## physics

A 5 m long see saw has a child whose mass is 25 kg sitting on one end. How far in meters from the center should a 70 kg adult sit on the opposite side for the see saw to balance?

asked by bob on June 8, 2010
68. ## physics

An 3730 kg airplane has a center of mass located 32 m from the front of the plane. A 123 kg man sits 25 m from the front of the plane. Where should a 76 kg woman sit so that the center of mass of the loaded plane is the same as the empty airplane? (m from

asked by sandhu on November 22, 2010
69. ## physics

A .1kg mass is located on the line between a 5kg mass and a 10kg mass. It is 4m to the right of the 5kg mass and 6m go the left of the 10kg mass. What is the magnitude and direction of the net force on the .1kg mass?

asked by Jen on November 17, 2011
70. ## physics

A mass spectrometer as shown in the attached figure is used to separate isotopes. If the bean emerges with a speed of 363 km/s and the magnetic field in the mass selector is 1.4 T, what is the distance between the collectors for 235U+1 and 238U+1? The mass

asked by Nelly on April 23, 2010
71. ## Physics

Initially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic?

asked by Mary on March 27, 2011
72. ## Physics

Initially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic?

asked by Mary on March 27, 2011
73. ## Chemistry

I cannot understand how the mass of the system has changed. There's no need for you to do my work please just explain it to me! :) thanks so much A scientist placed copper powder into a crucible and heated it until all of the copper reacted. The resulting

asked by nicole on September 29, 2015
74. ## Physics

two point masses are located in the same plane. the distance from mass 1 to the center of mass is 3.0m. The distance from mass 2 to the center of mass is 1.0m. What is m1/m2, the ratio of mass 1 to mass 2?

asked by Jacob on March 29, 2011
75. ## physics help 2 please!!

Mass A (7 kg) and mass B (10 kg) sit on the ground, 2 m apart. a.) What is size of the the gravitational force: on A from B? N on B from A? N b.) What is the size of the gravitational force: on A from the Earth? N on B from the Earth? N once again, i am

asked by kelsey on October 31, 2008
76. ## physics

Two boxes sit side-by-side on a smooth horizontal surface. The lighter box has a mass of 5.18 kg, the heavier box has a mass of 7.51 kg. (a) Find the contact force between these boxes when a horizontal force of 3.9 N is applied to the light box.

asked by jeff on September 26, 2011
77. ## Chem

Final question.. An alloy used in aircraft construction consists of aluminium, copper and magnesium. An 11.34g sample of alloy was treated with alkali to dissolve the aluminium, leaving a residue of mass 2.73g. This residue was treated with dilute

asked by atriletz on January 27, 2007
78. ## Chemistry

Five mineral samples of equal mass of calcite, CaCO3 (MM 100.085) , had a total mass of 12.4 ± 0.1 g. What is the average mass of calcium in each sample? (Assume that the relative uncertainties in atomic mass are small compared the uncertainty of the

asked by Amanda on August 29, 2012
79. ## Chemistry 314

Five mineral samples of equal mass of calcite, CaCO3 (MM 100.085) , had a total mass of 12.4 ± 0.1 g. What is the average mass of calcium in each sample? (Assume that the relative uncertainties in atomic mass are small compared the uncertainty of the

asked by Amanda on August 30, 2012
80. ## Physics- 2D Collisions

nitially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic?

asked by Rob on March 29, 2011
81. ## Final Exam- Honors Physical Science

how can you determine the number of protons, electrons,neutrons, atomic number, and the atomic mass of an element using the periodic table? Atomic mass is given in the table, as well as the atomic number and atomic mass number. Atomic number is the number

asked by Kate on June 4, 2007
82. ## Physics Help

A student is trying to reduce the mass of a racing bike to achieve greater acceleration. Which would be more beneficial to reduce (assuming each has identical mass)? a. decrease mass in the frame b. decrease mass in the wheels c. decrease mass in the rider

asked by Anonymous on October 16, 2017
83. ## Chemistry

Calculate the mass defect and the binding energy/nucleon of the nuclide 9/4 Be, which has a mass of 9.01218224 amu. The mass of the proton is 1.00726747 amu and the mass of the neutron is 1.00866490 amu. I've gotten this far... mass of proton + mass of

asked by Anonymous on June 8, 2010
84. ## chemistry

thank you for any help possible. Given a Mass Percent 13.3% and a Mass Solvent of 325.2 g, find Mass of Solute and Mass of Solution. Mass%=13.3% Mass solvent= 325.2g solve for the Mass solute and Mass solution. This is all the information I am given.

asked by ben 16 on December 4, 2011
85. ## Astronomy Question about Neutrinos

I can't seem to figure this out, I know that neutrinos have nonzero mass but I don't know how that can help me figure this out The mass of a neutrino is zero. equal to the mass of a proton. equal to the mass of an electron. less than the mass of an

asked by Kaitlyn on May 4, 2014
86. ## Physics

A light, ideal spring with a spring constant k = 100 N/m and uncompressed length L = 0.30 m is mounted to the fixed end of a frictionless plane inclined at an angle θ = 30.0° as shown above. Then a mass M 0.300 kg is affixed to the end of the spring and

asked by Jonah on October 22, 2017
87. ## Math

There are 2015 people sitting at a table, each person belongs to one of the four group: student,professors, presidents and deans. Students hate professors, and will never sit next to them. Likewise for presidents and deans. Explain why, in every possible

asked by Tianna on October 10, 2015
88. ## physics

A 443 kg mass is brought close to a second mass of 181 kg on a frictional surface with coeﬃcient of friction 0.5. At what distance will the second mass begin to slide toward the ﬁrst mass? The acceleration of gravity is 9.8 m/s 2 and the value of the

asked by Anonymous on December 13, 2012
89. ## Physics

A 399 kg mass is brought close to a second mass of 185 kg on a frictional surface with coeﬃcient of friction 1.5. At what distance will the second mass begin to slide toward the ﬁrst mass? The acceleration of gravity is 9.8 m/s 2 and the value of the

asked by Jesus on December 12, 2011
90. ## physics

A 443 kg mass is brought close to a second mass of 181 kg on a frictional surface with coeﬃcient of friction 0.5. At what distance will the second mass begin to slide toward the ﬁrst mass? The acceleration of gravity is 9.8 m/s 2 and the value of the

asked by Anonymous on December 13, 2012
91. ## CHEMISTRY

A glass vessel has a mass of 53.8718 g when evacuated (no air). When filled with a liquid of density 1.319 g mL-1 it has a mass of 255.7390 g and when filled with an unknown gas at 752.3 torr and 16.12°C it has a mass of 54.2483 g. What is the molar mass

asked by Matt on January 20, 2008
92. ## Physics

A mass m = 1.50 kg oscillates on an ideal,massless horizontal spring with a constant k = 73.5 N/m.The amplitude of oscillation is 10.0 cm.The system is frictionless. The positive x-direction is to the right. What is the mass's natural period of

asked by Sandhya on December 2, 2009
93. ## PHYSICS

Several people are riding in a hot-air balloon. The combined mass of the people and balloon is 308 kg. The balloon is motionless in the air, because the downward-acting weight of the people and balloon is balanced by an upward-acting 'buoyant' force. If

asked by Sarah on September 23, 2010
94. ## physics

Several people are riding in a hot-air balloon. The combined mass of the people and balloon is 328 kg. The balloon is motionless in the air, because the downward-acting weight of the people and balloon is balanced by an upward-acting 'buoyant' force. If

asked by Donald on October 4, 2012
95. ## physics

Several people are riding in a hot-air balloon. The combined mass of the people and balloon is 310 kg. The balloon is motionless in the air, because the downward-acting weight of the people and balloon is balanced by an upward-acting “buoyant” force.

asked by Anonymous on January 4, 2011
96. ## physics

Several people are riding in a hot-air balloon. The combined mass of the people and balloon is 284 kg. The balloon is motionless in the air, because the downward-acting weight of the people and balloon is balanced by an upward-acting 'buoyant' force. If

asked by Donna on September 26, 2013
97. ## Physics

A 0.495-kg mass is attached to a horizontal spring with k = 108 N/m. The mass slides across a frictionless surface. The spring is stretched 33.3 cm from equilibrium, and then the mass is released from rest. Find the speed of the mass when it has moved 4.79

98. ## AP Physics

Two people are standing on a 2.2-m-long platform, one at each end. The platform floats parallel to the ground on a cushion of air, like a hovercraft. One person throws a 6.0-kg ball to the other, who catches it. The ball travels nearly horizontally.

asked by Kylie on November 26, 2014
99. ## Physics

Two people are standing on a 2.2-m-long platform, one at each end. The platform floats parallel to the ground on a cushion of air, like a hovercraft. One person throws a 6.1-kg ball to the other, who catches it. The ball travels nearly horizontally.

asked by Z on October 24, 2008
100. ## physics

A 12 kg mass on a horizontal friction-free air track is accelerated by a string attached to a 100 kg mass hanging vertically from a pulley as shown. Compare the accelerations when the masses are interchanged, that is, for the case where the 100 kg mass

asked by naomi on June 3, 2007