# If a bowling ball hits a wall with a force of 6 N the wall exerts what force back on the bowling ball? the choices are 0N 3N 6N 12N I think its 6N

33,166 questions, page 314
1. ## Corporate Finance

1) A typical use of managerial accounting is to: a) help investors and creditors assess the financial position of the company b) help management get a clean audit report c) help the marketing manager decide which product promotion to implement d) help the

asked by Betamou on November 25, 2011
2. ## Physics

How to solve? 2. A 70.0 kg astronaut is training for accelerations that he will experience upon reentry. He is placed in a centrifuge (r = 10.0 m) and spun at a constant angular velocity of 16.3 rpm. Answer the following: a. What is the angular velocity of

asked by Josh on May 20, 2014
3. ## Physics

Electrons in a narrow beam travelling at a steady speed of 5 x 10^7 ms^-1 are directed into the space between two oppositely charged parallel plates 50mm apart. The potential difference between the plates is 2500V. The initial direction of the beam is

asked by Ben on February 17, 2016
4. ## physics

Consider the Earth and the Moon as a two-particle system. (a) Find the gravitational field of this two-particle system at the point that is exactly halfway between the Earth and the Moon. (Assume a radial direction r̂ from the Earth to the Moon. Express

asked by joy on February 16, 2018
5. ## physics

A jet plane is flying with a constant speed along a straight line, at an angle of 25.0° above the horizontal, as Figure 4.30a indicates. The plane has weight whose magnitude is 86500 N, and its engines provide a forward thrust of 103000 N. In addition,

asked by anonymous on December 4, 2010
6. ## physics

a 1.5-kg object moves up the y-axis at a constant speed. When it reaches the origin,the forces F1 =5.0 N at 37 deg above the the + x-axis, F2 = 2.5 N in the +x-direction, F3 = 3.5 N at 45 deg below the -x-axis, and F4 = 1.5 N in the -y direction are

asked by melissa on January 17, 2008
7. ## Physics

1. The total length of a spring is 0.25 m. What it is unstretched and 0.30 m when a force of 17.82 N is applied to it. What will be the length when 26.72 N is applied to it? 2. A piller with a cross sectional area of 1.5 m^2 supports a portion of a

asked by Cielo on September 3, 2014
8. ## Physics

The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 114 kgand radius R = 80 cm.The engine rotates the wheel at 540 rpm. In an emergency, to bring the engine to a stop, the flywheel is disengaged from the engine and a brake pad

asked by Donny on October 24, 2010
9. ## Hard Physics Problem

The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 131 kgand radius R = 80 cm.The engine rotates the wheel at 580 rpm. In an emergency, to bring the engine to a stop, the flywheel is disengaged from the engine and a brake pad

asked by Donny on October 25, 2010
10. ## physics.

Multiple-Concept Example 3 provides some pertinent background for this problem. Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is

asked by Jordan on February 11, 2009
11. ## Physics

Multiple-Concept Example 3 provides some pertinent background for this problem. Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is

asked by Sarah on February 11, 2009
12. ## Physics

In a machine shop, a hydraulic lift is used to raise heavy equipment for repairs. The sys- tem has a small piston with a cross-sectional area of 0.063 m2 and a large piston with a cross-sectional area of 0.172 m2. An engine weighing 2800 N rests on the

asked by M&M on June 28, 2013
13. ## Physics

1) A sample of gas is in a cylinder with a moveable piston. The force on the piston can be varied, altering the pressure and volume. A sample of gas is taken from an initial state to a final state following a curve on a pV diagram at right (vertical line).

asked by Live on January 16, 2019
14. ## physics

Lubricating oil, with a relative density of 0.79, flows around a 90¨¬ bend. The pipe diameter is 0.45m, and the oil has a pressure head of 7m and the flow is 1.7m3/s. Find the force exerted by the oil on the bend. Oil density = 0.79 X 103 Volumetric mass

asked by Michel on April 2, 2009
15. ## Physics

Problem 1 (80 points) Consider a spring of equilibrium length L, lying horizontally in a frictionless trough. The spring has cross sectional area S perpendicular to its length. The trough constrains the motion of the spring so that any wave propagating

asked by Brandon on January 29, 2014
16. ## Physics

Let's say that the force of gravity on the equator of the Earth is 9.81 m/s^2 what is the magnitutde of gravity of something at 41.603221,-73.087749 ???? I'm guessing that 41.603221,-73.087749 is lattitude and longittude so I really have no idea what to

asked by HELP ME! on May 19, 2009
17. ## Algebra-based Physics

A large fish hangs from a spring balance supported from the roof of an elevator. If the elevator has an upward acceleration of 2.65 m/s^2 and the balance reads 70.0 N, what is the true weight of the fish? Under what circumstances will the balance read 34.0

asked by Mike on September 30, 2006
18. ## Physics

A wooden block of mass 9 kg is at rest on an inclined plane sloped at an angle theta from the horizontal. The block is located 5 m from the bottom of the plane. A) Find the frictional force for theta = 20 B)If the angle is increased slowly the block starts

asked by Olivia on September 28, 2016
19. ## physics

A model sailboat is slowly sailing west across a pond at 0.342 m/s. A gust of wind blowing at 28.7° south of west gives the sailboat a constant acceleration of magnitude 0.305 m/s2 during a time interval of 1.87 s. If the net force on the sailboat during

asked by Liz on September 24, 2012
20. ## Physics

A 0.9-kg block (mass m) and a second block (mass M) are both initially at rest on a frictionless inclined plane. Mass M rests against a spring that has a force constant of 12.2 kN/m. The distance d along the plane between the two blocks is 3.64 m. The

asked by Anonymous on November 9, 2014
21. ## Physics 11U

At the moment when a shot putter releases a 5.00 kg shot, the shot is 2.00 m above the ground and travelling at 15.0 m/s. It reaches a maximum height of 8.0 m above the ground and then falls to the ground. Assume air resistance is negligible. a) What was

asked by hi! help me. on November 3, 2014
22. ## AP Physics Springs - very confusing question

This is part of a lab with a mass attached to a spring, and the mass attached is of unknown weight. Which of the following can you measure to find one of the unknown masses? You can select more than one. a) the distance the mass stretches the spring b) the

asked by Tyger2020 on September 4, 2017
23. ## Physics

You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight is 770 N and that of your belongings is 1040 N. Determine the work done by the elevator in lifting you and your belongings up to the 6th floor (15.2 m) at a

asked by BrookeNeed on October 11, 2016
24. ## physics

A generator with a single loop produces the greatest magnetic force on the charges and the greatest induced emf when a. the plane of the loop is parallel to the magnetic field. b. half of the loop segments are moving perpendicular to the magnetic field. c.

asked by Daniel on April 23, 2019
25. ## physics

A lead brick with volume of 7*10^-4m^3 is floating in bath of liquid mercury. What fraction of the lead brick’s volume is above the surface of mercury? A student uses a stick to push the lead brick below the mercury surface so that it is completely

asked by sand on December 12, 2011
26. ## Physics

i'm having trouble with this Which of the following statements about floating objects is correct? a. the object's density is greater than the density of the fluid on which it floats b. the object's density is equal to the density of the fluid on which it

asked by Bella on February 20, 2009
27. ## physics

A lead brick with volume of 7*10^-4m^3 is floating in bath of liquid mercury. a) What fraction of the lead brick’s volume is above the surface of mercury? A student uses a stick to push the lead brick below the mercury surface so that it is completely

asked by sand on December 26, 2011
28. ## Physics

1. A worker pushes horizontally on a 2000 N refrigerator on a kitchen floor with a force of 25 N. Which statement is the most accurate about the situation? A. If the refrigerator moves forward, this person feels it pushing back with less than 25 N. B. The

asked by Amber on October 5, 2018
29. ## physics

A 40 kg skier comes directly down a frictionless ski slope that is inclined at an angle of 10 degrees with the horizontal while a strong wind blows parallel to the slope. Determine the magnitude and diercection of the force of the wind on the skier id a)

asked by Dee on November 25, 2006
30. ## physics

A 40 kg skier comes directly down a frictionless ski slope that is inclined at an angle of 10 degrees with the horizontal while a strong wind blows parallel to the slope. Determine the magnitude and diercection of the force of the wind on the skier id a)

asked by Bri on November 21, 2006
31. ## physics

A locomotive that has a mass of 6.4 x 105 kg is used to pull 2 railway cars. Railway car 1 has a mass of 5.0 x 105 kg, is attached to railway car to that has a mass of 3.6 x 105 kg by a locking mechanism. A railway engineer tests the mechanism and

asked by Anthony on October 30, 2013
32. ## managerial economics

a material handling company pays each of its sale persons a base salary plus a percentage of revenue generated. To reduce overhead EFI has switched from giving each salesperson a company car to reimbursing them .35 for each business related mile driven.

asked by cheer1 on March 11, 2008
33. ## home economics

a material handling company pays each of its sale persons a base salary plus a percentage of revenue generated. To reduce overhead EFI has switched from giving each salesperson a company car to reimbursing them .35 for each business related mile driven.

asked by cheer1 on March 11, 2008

The space shuttle orbits at a distance of 335 km above the surface of the Earth. What is the gravitational force (in N) on a 1.0 kg sphere inside the space shuttle. Assume that the mass of the Earth is 5.98x1024 kg and the radius of the Earth is 6370 km

asked by ... on November 25, 2011
35. ## physics

There are two +q charges and two -q charges on the corners of a square of size a. Left upper corner= +q charge, right upper corner= -q charge, left lower corner= -q charge, and right lower corner= +q charge. Compute the net force on each charge. I know

asked by Jessica on February 20, 2008
36. ## physics

A pigeon in flight experiences a force of air resistance given approximately by F=bv2, where V is the flight speed and B is a constant. A) In terms of SI units, what are the units for the constant "b"? B) What is the largest possible speed of the pigeon if

asked by Mark on March 23, 2010
37. ## Physics

According to the Guinness Book of World Records (1990 edition, p. 169), the highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15 cm (5.9 in) long. Assume the speed quoted is that of the end of the rod. What is the centripetal

asked by Emily on January 13, 2013
38. ## Physics

Determine the normal force for a laundry basket with a mass of 4.7 kg in each of the following situations (a) at rest on a horizontal surface _________ N (b) at rest on a ramp inclined at 12° above the horizontal _______ N (c) at rest on a ramp inclined

asked by Dakota on October 23, 2012
39. ## physics

An object with mass 110 kg moved in outer space. When it was at location < 11, -35, -7 > its speed was 17.5 m/s. A single constant force < 230, 420, -230 > N acted on the object while the object moved to location < 16, -41, -13 > m. What is the speed of

asked by samantha on July 5, 2014

The engine of a train has a mass of 5x10^4 kg. it can accelerate six railway cars having a total mass of 3x10^5 kg by 0.4 m/s^2 (the 6 railway cars have a combined mass of 3x10^5). what acceleration can the same engine using the same force give to four

asked by Jess J on April 25, 2011
41. ## science

A 75 kg astronaut in space pushes against a 200 kg anvil. When the astronaut lets go of the anvil while pushing it: a. both astronaut and anvil accelerate in opposite directions at the same rate b. neither the astronaut nor the anvil will accelerate since

asked by sang on October 25, 2010

The engine of a train has a mass of 5x10^4 kg. it can accelerate six railway cars having a total mass of 3x10^5 kg by 0.4 m/s^2 (the 6 railway cars have a combined mass of 3x10^5). what acceleration can the same engine using the same force give to four

asked by Jess J on April 20, 2011
43. ## Chemistry

What is the strongest intermolecular force exhibited in each? Covalent molecules, Ionic compounds, polar covalent molecules. This is my answer: Covalent- dipole-dipole forces Ionic- ion-dipole forces Polar Covalent- electrostatic forces Is this correct?

asked by Jessie on September 22, 2011
44. ## Physics

The engine of a train has a mass of 5x10^4 kg. it can accelerate six railway cars having a total mass of 3x10^5 kg by 0.4 m/s^2 (the 6 railway cars have a combined mass of 3x10^5). what acceleration can the same engine using the same force give to four

asked by Jess J on April 20, 2011
45. ## Physics

The modern Boeing 747 passenger jet airplane cruises at a speed up to 900 km/hr, at an altitude of 11,000 m. The cabin pressure is maintained equivalent to the atmospheric pressure at an altitude of 2,000 m. This is called the "cabin altitude". The

asked by Francisco on January 27, 2013
46. ## Physics

During 2004, japanese scientists successfully tested two solar sails. One had somewhat complicated shape that we shall model as a disk 9 m in diameter and 7.5 um thick. The intensity of solar energy at this location was about 1400 W/m ^2. (a) What force

asked by J on March 31, 2008
47. ## Algebra

The five fastest roller coasters in the world Fujiyama(Japan), Goliath(CA), Millenium Force(OH), Steel Dragon 2000(Japan), and Superman the Escape(CA). The speeds, in mph, of the first four coasters are 83,85,92,and 95, respectively. How fast can Superman

asked by Jon on February 16, 2008
48. ## English

Over the summer I read several different books, but the two that stuck out the most to me was Salt A World History by Mark Kurlansky and SUB 4:00 Alan Webb and the Quest for the Fastest Mile by Chris Lear. When I am asked which author was more successful

asked by Dylan on July 22, 2008
49. ## Physics

To treat fractures of the humerus shaft, a cast and traction device is used; such that the cast of the upper arm is bent by 100 degrees to 110 degrees at the elbow joint. The traction device is an object of mass M that is hung at the elbow, it keeps the

asked by Nikita on October 19, 2009
50. ## Physics

A positively charged particle of mass 5.60 10-8 kg is traveling due east with a speed of 60 m/s and enters a 0.49-T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 1.20 10-3 s, at which time it leaves the field

asked by Don on April 4, 2013
51. ## physics

a 1.50 kg book is sliding along a rough horizontal surface. At point A it is moving at 3.21 m/s, and at point B it has slowed to 1.25m/s. 1.) How much work was done on the book between A and B? 2.) If -0.750 J of work is done on the book from B to C, how

asked by Jud on March 5, 2010
52. ## Physics

A positively charged particle of mass 5.60 10-8 kg is traveling due east with a speed of 60 m/s and enters a 0.49-T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 1.20 10-3 s, at which time it leaves the field

asked by Don on April 4, 2013
53. ## physics

Three point charges, q1, q2, and q3, lie along the x-axis at x=0, x=3 cm, and x=5 cm, respectively. Calculate the magnitude and direction of the electric force on each of the three points when q1=+6.0 muC, q2=+1.5 muC, and q3=-2.0 muC. I would add the

asked by Mischa on April 11, 2007
54. ## physics

A ring fixed to a support at the top is hanging vertically. A bead of mass m slides through the ring and is connected to the support through a spring of stiffness k as shown in the figure-1. The length of the unstretched spring is almost negligible. Note

asked by nain abbas on December 30, 2011
55. ## HELP! - Physics

I need help with this. A frustrated farmer is trying to move a large rock from his land. The stone has a mass of 1275 kg. By using a piece of board as a lever and a fulcrum the farmer will have a better chance of moving the rock. The farmer places the

asked by Johnny on October 28, 2014
56. ## Physics... Coulomb's law

Two small silver spheres with a mass of 10.0g, are separated by 1.00m. Calcuate the fraction of the electrons in one sphere that must be transfered to the other to produce an attractive force of 1.00x10^4 N (about 1 ton) between spheres (number of

asked by ~christina~ on March 30, 2008

"Abbott: Oh, I'll tell you their names, but you know it seems to me they give these ball players now-a-days very peculiar names. Costello: You mean funny names? Abbott: Strange names, pet names...like Dizzy Dean... Costello: His brother Daffy. Abbott:

asked by kathy on April 15, 2012
58. ## Physics

A 15kg box is given an initial push so that it slides across the floor & comes to a stop. I the coefficient of friction is .30, a) find Ffr- Fg=mg - Fg=15kg(9.8N/kg)=147N Ffr=mu(Fn) - Ffr=.30(147N)=44.1 b) Find the acceleration of the box. Hint: what is

asked by Kayla on May 1, 2017
59. ## Physics

You pull downward with a force of 27 N on a rope that passes over a disk-shaped pulley of mass 1.3 kg and radius 0.075 m. The other end of the rope is attached to a 0.61 kg mass. Find the tension in the rope on both sides of the pulley. I found that the

asked by Mary on March 21, 2010
60. ## physics

Two insulated wires, each 2.70 m long, are taped together to form a two-wire unit that is 2.70 m long. One wire carries a current of 7.00 A; the other carries a smaller current I in the opposite direction. The two wire unit is placed at an angle of 77.0°

asked by Dee on February 26, 2014
61. ## PHYSICS

In attempting to pass the puck to a teammate, a hockey player gives it an initial speed of 1.43 m/s. However, this speed is inadequate to compensate for the kinetic friction between the puck and the ice. As a result, the puck travels only one-half the

asked by KS on April 21, 2015
62. ## physics

A 4.0-kg block is stacked on top of a 12.0-kg block, which is accelerating along a horizontal table at a = 5.2m/s2 . Let u=uk=us. (a) What minimum coefficient of friction u between the two blocks will prevent the 4.0-kg block from sliding off? (b) If u is

asked by Anonymous on November 20, 2012

An arbitary list of integers both positive and negative is presented to two player,playerA and playerB.with A playing first in there turn,either players is allowed to pick the first or last number from the remaining list,and the number is deleted from the

asked by dam on May 10, 2016
64. ## maths-somebody!anyone help

An arbitary list of integers both positive and negative is presented to two player,playerA and playerB.with A playing first in there turn,either players is allowed to pick the first or last number from the remaining list,and the number is deleted from the

asked by dam on May 11, 2016
65. ## engineering

If a pogo stick was to be reinvented and you were to choose the spring type. What type of spring will generate the most return of kinetic energy compared to least amount of force needed to compress the spring...you can use leaf, coil, scissor, compression,

asked by dave on March 7, 2011
66. ## science

A uranium and iron atom reside a distance R = 28.70 nm apart. The uranium atom is singly ionized; the iron atom is doubly ionized. Calculate the distance r from the uranium atom necessary for an electron to reside in equilibrium. Ignore the insignificant

asked by Kels on February 19, 2013
67. ## science

A uranium and iron atom reside a distance R = 28.70 nm apart. The uranium atom is singly ionized; the iron atom is doubly ionized. Calculate the distance r from the uranium atom necessary for an electron to reside in equilibrium. Ignore the insignificant

asked by Kels on February 19, 2013
68. ## physics

1. The weight in the following diagram has a mass of 0.750 kg and the cart has a mass of 0.52 kg. There is a friction force of 2.1 N acting on the cart. What is the tension in the string? a. 4.4 N b. 4.3 N c. 4.1 N d. 4.2 N 2. An 8.5 kg block is attached

asked by liz on June 2, 2017
69. ## physics

a toy spring gun is used to shoot 28-g bullets vertically upward. the un deformed length is 150 mm, it is compressed to a length of 25 mm when the gun is ready to be shoot and expands to a length of 75mm as the bullet leaves the gun. a force of 45 N is

asked by jenny on June 1, 2011

Q. a 2.0 kg block is placed against a spring of force constant 800 N/m, which has been compressed 0.15m. The spring is released, and the block moves 1.2m along a horizontal surface with a coefficient of friction of 0.19. The block then slides up the

asked by Ring on October 14, 2008
71. ## Science (Energy)

Ok i have done 2 experiments (See below) the question i need help with is i need to explain the difference for the two combustions and i just don't know, please help me and thankyou for your help. The Combustion Of Marshmallows Aim To investigate how much

asked by Paul on December 17, 2010
72. ## physics

You and a friend are going to a river, where they have a rope swing. Your friend, who has a mass of 60 kg, hops on the end of the rope. You tug horizontally on your friend with a force of 300 N, pulling them back until you can't move them any more. Then

asked by raj on February 21, 2013
73. ## English

Can someone check over the grammatical errors in my riddles. Do you have any suggestions on how to improve them? Often revered for my beauty, I am put on the spot. King Arthur’s lover is what I am suspected to be but the truth is I see in Lancelot what

asked by Anonymous on December 11, 2007
74. ## Physics

A car is approach a corner too fast and locks up the brakes at point A and holds them on for 12.5 M to point B. The car then moves from point B at a constant speed and does into the corner. At Point C because the car is still going to fast it goes out of

asked by Drew on January 20, 2011

Two parallel wires are carrying 5A and are separated by 2.0 m. if the currents are in opposite directions, what is the magnitude of the magnetic field halfway between them? Someone please help as I can't figure out the question. Thanks, They are asking for

asked by James P. on June 20, 2007
76. ## calc check: hooke's law

A force of 27N is required to maintain a spring stretched from its natural length of 12cm to a length of 15cm. How much work is done in stretching the spring from 15 to 25cm? and this is what i did.. please check to see if i did it correctly.. thanks :)

asked by COFFEE on June 29, 2007
77. ## Physics

A force of 310 N is applied horizontally to a crate in order to displace the crate 45.0 m across a level floor at a constant velocity. As a result of this work, the crate's internal energy is increased by an amount equal to 12 percent of the crate's

asked by Casey on December 4, 2012
78. ## pyhsics

So I already got the answer for the first part: An airplane is flying in a horizontal circle at a speed of 102 m/s. The 80.0 kg pilot does not want the centripetal acceleration to exceed 6.18 times free-fall acceleration. Find the minimum radius of the

asked by julie on November 19, 2012
79. ## physics

So I already got the answer for the first part: An airplane is flying in a horizontal circle at a speed of 102 m/s. The 80.0 kg pilot does not want the centripetal acceleration to exceed 6.18 times free-fall acceleration. Find the minimum radius of the

asked by julie on November 19, 2012
80. ## excersize science

What are a few excersizing you can do to strengthen the abdominal muscles Which set of muscles would you use for lateral bending and rotation of the trunk? For abs, sit-ups or crunches are considered the best.

asked by ana on January 14, 2007
81. ## Physics

A -10 mC charge experiences a force of 75 N directed south. What is the electric field magnitude and direction at the location of the charge? If this charge is removed and not replaced, what is the electric field magnitude and direction at the location it

asked by Alaine' on May 5, 2012
82. ## Chemistry

What is the strongest intermolecular force present in each molecule: H2S CF4 NH3 CS2 PCL3 N CH2O C2H6 CH3OH BH3 My work: Hydrogen bonding London dispersion Dipole dipole London dispersion Dipole dipole London dispersion Hydrogen bonding Hydrogen bonding

asked by Rose on February 28, 2016
83. ## Physics

An electric force moves a charge of +1.40 x 10^-4 C from point A to point B and performs 4.70 x 10^-3 J of work on the charge. (a) What is the difference (EPEA - EPEB) between the electric potential energies of the charge at the two points? ____________J

asked by Mary on September 3, 2007
84. ## 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
85. ## physics

What can we conclude from the attractive nature of the force between a positively charged rod and an object? 1. The object has no net charge. 2. Cannot be determined. 3. The object does not have an appreciable negative charge. 4. The object does not have

asked by Anonymous on February 20, 2010
86. ## English

These are the very last sentences. I really hope you can check them. It is really urgent. Thank you in advance. 1) Bitzer embodies the word of facts, in which Mr. Gradgrind believes. Society was regarded as an evil force, which prevented men from behaving

asked by Mike on February 23, 2011
87. ## physics

at on time, the velocity of a rifle bullet was measured using a ballistic pendulum made up of a wooden block suspended from a string. the block used here has a mass of 20kg. a 50g rifle bullet is fired into the block, penetrating it by 10cm and causing it

asked by dave on September 2, 2010
88. ## psuchics

Reaction at support and internal axial force resultant Consider two straight bars of uniform cross section made of the same material. Bar 1 has an axial length 1m of and a square cross section 1mm with side length . Bar 2 has an axial length of 3 m and a

asked by asas on April 29, 2013
89. ## Physic

Reaction at support and internal axial force resultant Consider two straight bars of uniform cross section made of the same material. Bar 1 has an axial length 1m of and a square cross section 1mm with side length . Bar 2 has an axial length of 3 m and a

asked by asas on April 29, 2013
90. ## physics

38. A rock of mass 0.400 kg is released from the surface and sinks in the ocean. As the rock descends it is acted upon by three forces: gravity, buoyancy, and drag. The buoyancy is an upward force equal to half its weight. Drag from the water can be

asked by Danny on February 17, 2015
91. ## PHYSICS - HELP

I NEED HELP ON C THROUGH F. THANK YOU A spring id vertically, as shown below, and a 500g mass is hung from its lower end. The EQUILIBRIUM extension of the spring is observed to be 10.0cm. (1) What is the spring constant of the spring? ANSWER: 49N/m (B) If

asked by Melissa on August 7, 2011
92. ## PHYSICS - HELP

A spring id vertically, as shown below, and a 500g mass is hung from its lower end. The EQUILIBRIUM extension of the spring is observed to be 10.0cm. (1) What is the spring constant of the spring? ANSWER: 49N/m (B) If the is pulled down by 5.00cm and

asked by Melissa on August 5, 2011
93. ## physics electricity

An electric force moves a charge of +1.65 multiplied by 10-4 C from point A to point B and performs 6.40 multiplied by 10-3 J of work on the charge. (a) What is the difference (EPEA - EPEB) between the electric potential energies of the charge at the two

asked by alex on January 3, 2010
94. ## physics

A man pushes on a piano of mass 180 so that it slides at a constant velocity of 12.0 down a ramp that is inclined at 11.0 above the horizontal. No appreciable friction is acting on the piano. Calculate the magnitude and direction of this push A. if the man

asked by bob on November 8, 2010
95. ## Physics

A 8.49-m ladder with a mass of 24.2 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 247 N. At the instant the top of the ladder leaves the ground, the ladder experiences an angular

asked by Kristi on August 16, 2011
96. ## Physics

A man pushes on a piano of mass 180 kg so that it slides at a constant velocity of 12.0 cm/s down a ramp that is inclined at 11.0degrees above the horizontal. No appreciable friction is acting on the piano. Calculate the magnitude and direction of this

asked by Carmen on November 11, 2010
97. ## Physics

A 8.78 -m ladder with a mass of 23.8 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 236 N. At the instant the top of the ladder leaves the ground, the ladder experiences an angular

asked by <3 on March 17, 2013
98. ## Physics

A 9.67-m ladder with a mass of 25.0 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 242 N. At the instant the top of the ladder leaves the ground, the ladder experiences an angular

asked by Natasha on April 18, 2012
99. ## University Physics

An elevator's cable snaps and its emergency brakes start gripping at the secondary line in order to slow its descent. The elevator and passengers weigh 389 kgs together and fall under the influence of gravity (9.81 m/s2). The coefficient of friction

asked by Stacy on September 30, 2009
100. ## Physics (Stress & Strain)

A hole 3cm in diameter is to be punched out of a steel plate 8cm thick. The shear stress of the material is 670GPa. What load is required on the punch? First find the area: A = pi*d^2/ 2 = 3.1416 * 3cm^2/ 2 = 3.1416 * 9/ 2 = 28.2744/ 2 = 7.0686cm Stress =

asked by Danny on June 24, 2013