# The speed (v) of an ocean wave depends on its wavelength ë (measured in meters) and the gravitational field strength g (measured in m/s62) according to the formula v = Këˣgʸ where K is a dimensionless constant. Find the value

43,115 questions, page 138
1. ## physics

The homework question asks: which work woulf be required to stop a moving object: the intial speed, the intial kinetic energy of the object, the mass of the object times it acceleration, the mass of the object times its intials speed, or the square of the

asked by tatiana on November 5, 2006
2. ## Physics

Specifically, which of the following best expresses your view: i. Many physics concepts make a lot of sense and connect to everyday experience; but formulas are more of a problem-solving tool than a sense-making tool. ii. It really depends on the formula.

asked by Tammy on March 29, 2011
3. ## Physics

Specifically, which of the following best expresses your view: i. Many physics concepts make a lot of sense and connect to everyday experience; but formulas are more of a problem-solving tool than a sense-making tool. ii. It really depends on the formula.

asked by Tammy on March 26, 2011
4. ## Physics

Specifically, which of the following best expresses your view: i. Many physics concepts make a lot of sense and connect to everyday experience; but formulas are more of a problem-solving tool than a sense-making tool. ii. It really depends on the formula.

asked by Tammy on March 28, 2011
5. ## physics

Two stars are 4.40 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.03 m and just detects these stars as separate objects. Assume that light of wavelength 550 nm is being observed. Also assume that

asked by Ethan on April 18, 2014
6. ## physics

Two stars are 3.80 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.19 m and just detects these stars as separate objects. Assume that light of wavelength 550 nm is being observed. Also assume that

asked by linds on April 15, 2012
7. ## physics

Two stars are 2.4 × 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.72 m and just detects these stars as separate objects. Assume that light of wavelength 590 nm is being observed. Also, assume

asked by Ashley on May 7, 2013
8. ## Physics

A 0.80 10^3 kg Toyota collides into the rear end of a 2.6 1^03 kg Cadillac stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 5.0 m before stopping. The police officer, knowing that the coefficient of kinetic

asked by Anonymous on March 5, 2014
9. ## Physics

I understand that I have to use newtons laws of motion but I don't really get how to aplly them to this problem. Please help. An aircraft with a mass of 11000kg moving at constant speed and altitude is powered by propellers and experiences drag from air.

asked by Summer on June 18, 2016
10. ## Physics

A race car starts from rest in the pit area and accelerates at a uniform rate to a speed of 35 m/s in 11s, moving on a circular track of radius 500 m. Determine the tangential and centripetal components of the net force excreted on the car(by the ground)

asked by Martin on May 19, 2013
11. ## physics

1.A train passes an electric post in 8sec and a bridge of length 1km in 108sec .Find the speed of the engine . 2.A runner travels at the rate o f25km/hr for 4min ;then at 50km/hr for 8minn and finally at 20km/hr for 2min .Find a) the total distance covered

asked by srikar on May 19, 2012
12. ## Physics

A football is kicked off with an initial speed of 63 ft/s at a projection angle of 45 degrees. A receiver on the goal line 67 yd away in the direction of the kick starts running to meet the ball at that instant. What must be his minimum speed (in

asked by 0tter on October 1, 2013
13. ## physics

Starting at the top of a steep, icy track, a rider jumps onto a sled (known as a skeleton) and proceeds - belly down and head first - to slide down the track. The track has fifteen turns and drops 104 m in elevation from top to bottom. (a) In the absense

asked by shaknocka on February 28, 2011
14. ## PHYSICS

A .01kg bullet traveling at 800m/s hits a disk with a radius of R=.1m at R/2 and leaves with a speed of 400m/s. what is the angular speed of the disk right after? (omega) I used conservation of momentum and the rotational inertia for a disk and found omega

asked by Taylor on November 30, 2010

A bat moving at 6.5 m/s is chasing a ﬂying insect. The bat emits a 37 kHz chirp and receives back an echo at 37.65 kHz. At what speed is the bat gaining on its prey? Take the speed of sound in air to be 336 m/s. Answer in units of m/s

asked by maura on December 8, 2012
16. ## physics

(a) Find the pressure difference on an airplane wing where air flows over the upper surface with a speed of 126 m/s, and along the bottom surface with a speed of 101 m/s.(kPa) (b) If the area of the wing is 30 m2, what is the net upward force exerted on

asked by aok on December 10, 2010
17. ## Physics

A 3600 kg open railroad car coasts along with a constant speed of 11.0 m/s on a level track. Snow begins to fall vertically and fills the car at a rate of 3.70 kg/min. Ignoring friction with the tracks, what is the speed of the car after 80.0 min?

asked by Linda on November 10, 2010
18. ## Physics

Suppose Fuzzy, a quantum mechanical duck, lives in a world in which h = 2π J.s. Fuzzy has a mass of 2.0 kg and is initially known to be within a region 1.0 m wide. a) What is the minimum uncertainty in his speed? b) Assuming this uncertainty in speed to

asked by Abby on April 7, 2011
19. ## College Physics

A 3400 kg open railroad car coasts along with a constant speed of 7.50 m/s on a level track. Snow begins to fall vertically and fills the car at a rate of 5.10 kg/min.Ignoring friction with the tracks, what is the speed of the car after 85.0 min ?

asked by Sandy on March 14, 2010
20. ## Physics

At an amusement park, a swimmer uses a water slide to enter the main pool. The swimmer slides without friction, and descends through a vertical height of 2.89 m. Find the swimmer's speed at the bottom of the slide if she starts with an initial speed of

asked by Greg on March 9, 2010
21. ## Physics

When needed, use 340 m/s for the speed of sound and 3.00 x 108 m/s for the speed of light. A hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake. She hears the echo 2.20 s after

asked by DariaV on July 21, 2019
22. ## physics

what is the impact speed when a car moving at 200 km/h bumps into the rear of another ar traveling in the same direction at 84km/h? answer in km/h Wouldn't the be the relative speed of each (200-84) as compared to the other? Thats what I initially tried

asked by cham on September 18, 2006
23. ## physics

A mechanic pushes a 3090 kg car from rest to a speed of v, doing 5497 J of work in the process. During this time, the car moves 22.1 m. Find the speed v. Neglect friction between car and road. Answer in units of m/s. 1/2mv^2 doesnt work

asked by Mitchell on February 12, 2017
24. ## physics

Suppose Fuzzy, a quantum mechanical duck, lives in a world in which h = 2π J.s. Fuzzy has a mass of 2.0 kg and is initially known to be within a region 1.0 m wide. a) What is the minimum uncertainty in his speed? b) Assuming this uncertainty in speed to

asked by Abby on April 8, 2011
25. ## Science

A truck is moving north at a speed of 70 km/h. The exhause pipe above the truck cab seeds out a tail of smoke that makes an angle of 20 degree east of south behind the truck. If the wind is flowing directly towards the east. What is the speed at that

asked by Sunday on March 5, 2019
26. ## physics

A metal bob is tied to one of an inextensible string of negligible mass and is rotated in a vertical circle of radius 8m.If the speed of the sphere at highest point of a circle is 80 m/s . Calculate its speed at the lowest point of the circle (Take

asked by snehal on January 19, 2017
27. ## Physics

Suppose Fuzzy, a quantum mechanical duck, lives in a world in which h = 2 J.s. Fuzzy has a mass of 2.0 kg and is initially known to be within a region 1.0 m wide. a) What is the minimum uncertainty in his speed? b) Assuming this uncertainty in speed to

asked by Abby on April 7, 2011
28. ## Physics

A cylinder with a diameter of 16 rolls with an angular speed of 0.055 on a level surface. If the cylinder experiences a uniform tangential acceleration of 0.020 without slipping until its angular speed is 1.0 , through how many complete revolutions does

asked by Anonymous on June 18, 2013
29. ## physics

(a) Find the pressure difference on an airplane wing where air flows over the upper surface with a speed of 126 m/s, and along the bottom surface with a speed of 101 m/s. kPa (b) If the area of the wing is 30 m2, what is the net upward force exerted on the

asked by aok on December 13, 2010
30. ## Math

You and your friend part at an intersection. You drive off north at a constant speed, and your friend drives east at a speed that is 10 mph higher. After 4 hours the distance between you and your friend is 368.78 miles. You have been driving at mph. (Round

asked by Emma on September 7, 2015
31. ## physics

A race car is making a U-turn at constant speed. The coefficient of friction between the tires and the track is μs = 1.0. If the radius of the curve is 40 m, what is the maximum speed at which the car can turn without sliding? Assume that the car is

asked by HELP!!!! on March 19, 2011
32. ## Physics

A boat must cross a 260-m-wide river and arrive at a point 110 upstream from where it starts. To do so, the pilot must head the boat at a 45 degree upstream angle. THe current has speed 2.3 m/s. a) What is the speed of the boat in still water? b) How much

asked by Chris on February 5, 2013
33. ## algebra

You and your friend part at an intersection. You drive off north at a constant speed, and your friend drives east at a speed that is 10 mph higher. After 4 hours the distance between you and your friend is 368.78 miles. You have been driving at mph. (Round

asked by Michael on September 7, 2015
34. ## physics

A 2500kg gun fires a 10.0kg projectile with a muzzle speed of 550m/s. A) determine the initial recoil speed of the gun B) If the recoil is against a constant resisting force of 4200N, find the time taken to bring the gun to rest.

asked by b on November 10, 2011
35. ## phy

A marble slides without friction in a vertical plane around the inside of a smooth, 21 cm-diameter horizontal pipe. The marble's speed at the bottom is 4.5 m/s this is fast enough so that the marble makes a complete loop, never losing contact with the

asked by Naso on March 23, 2010
36. ## science

A bat moving at 5.6 m/s is chasing a flying insect. The bat emits a 60 kHz chirp and receives back an echo at 60.63 kHz. At what speed is the bat gaining on its prey? Take the speed of sound in air to be 338 m/s. Answer in units of m/s

asked by Anonymous on April 23, 2014
37. ## AlgebraB-2

A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = 0.04x+ 8.3x + 4.3, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of

asked by Jennifer W. on March 26, 2013
38. ## physics

Alex works at a legal firm which produces a lot of documents. Often Alex has to carry heavy stacks of documents from one office to another. On this particular day Alex, who weighs 75 kilograms, has to transport a stack of documents which weighs10

asked by Cynethia on April 2, 2015
39. ## chem

1. under what circumstances is the molecular geometry around a single central atom the same as the electron group geometry around the central atom? 2.If all of the electron groups around a single central atom are bonding, and the same outer atom is bonded

asked by natash on April 28, 2008
40. ## algebra

i really your need help,i don't understand the problem. The velocity of a blood corpuscle in a vessel depends on how far the corpuscle is from the center of the vessel. Let R be the constant radius of the vessel; Vm, the constant maximum velocity of the

asked by Eya on August 11, 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
42. ## physics

A body at rest is given an initial uniform acceleration of 8m/s2 for 30s after which the acceleration is reduced to 5m/s2 for the next twenty seconds. The body maintains the speed attained for 60s, after which it is brought to rest in 20s. 1. Draw the

asked by jane on August 28, 2011

In downhill speed skiing a skier is retarded by both the air drag force on the body and the kinetic frictional force on the skis. Suppose the slope angle is θ = 39.5°, the snow is dry snow with a coefficient of kinetic friction μk = 0.0400, the mass of

asked by Hailey56 on October 26, 2012
44. ## physics

In downhill speed skiing a skier is retarded by both the air drag force on the body and the kinetic frictional force on the skis. Suppose the slope angle is è = 37.5°, the snow is dry snow with a coefficient of kinetic friction ìk = 0.0400, the mass of

asked by johnny on December 13, 2008
45. ## Physics help needed !

In downhill speed skiing a skier is retarded by both the air drag force on the body and the kinetic frictional force on the skis. Suppose the slope angle is θ = 39.5°, the snow is dry snow with a coefficient of kinetic friction μk = 0.0400, the mass of

asked by agentx on October 26, 2012
46. ## une lab de physics

Hello, we are doing a lab dealing with diffraction gratings. The problem I have is that we are supposed to find the number of slits, N, based on gathered information. I have x, L, d, m, and w, just not N, which is what I am trying to find. I also have the

asked by URGENT on December 11, 2007
47. ## Physics Lab

Hello, we are doing a lab dealing with diffraction gratings. The problem I have is that we are supposed to find the number of slits, N, based on gathered information. I have x, L, d, m, and w, just not N, which is what I am trying to find. I also have the

asked by McPhysics on December 11, 2007
48. ## Physics

4th order dark fringe and 2nd order bright fring spaced 2.5cm apart appear on the screen placed 1 m behind the double slit. What is the spacing of the slits if the waveleght of incident light is 500nm? x=2.5cm=.025m L=1m wavelegth= 500nm = 5x10^-7m d=?

asked by Andrea on April 22, 2008
49. ## Physics

An electromagnetic wave has an electric field strength of 145 V/m at a point P in space at time t. A parallel-plate capacitor whose plates have area 0.109 m2 has a uniform electric field between its plates with the same energy density as the answer to part

asked by Drew on July 1, 2010

technology manager sharry jones is reviewing a new EMR software program for the hospital where she works, and judges it to be more user-friendly than othere she has tested. in other words, sharry likes this one's" a. processor b. speed and power c.

asked by shay on February 15, 2010
51. ## Physics

Miss E. deWater, the former platform diver of the Ringling Brothers' Circus, dives from a 80.0-meter high platform into a shallow bucket of water (see diagram at right). Determine her speed and her height after each second of fall. When t = 0 s: speed = 0

asked by Ryan on November 6, 2015

technology manger sharry jones is reviewing a mew EMr software program for the hospital where she works, and judges it to be more user-friendly than others she has tested. in other words, sharry likes this one's: a. processor b. speed and power c.

asked by shay on February 15, 2010
53. ## Physics

Miss E. deWater, the former platform diver of the Ringling Brothers' Circus, dives from a 80.0-meter high platform into a shallow bucket of water (see diagram at right). Determine her speed and her height after each second of fall. When t = 0 s: speed = 0

asked by Ryan on November 6, 2015
54. ## Physic

A CD rotates from rest up to an angular speed of 32.40 radians per second in a time of 0.861 seconds. Determine the angle (in degrees) through which the disc turns while coming up to speed assuming that the tangential acceleration is uniform. I hve tried

asked by Janki Patel on November 4, 2012
55. ## Physics

A car moving at some speed hits the brakes and skids to a stop after 11 m on a level road. If the coefficient of friction for the road conditions of wet asphalt is 0.53, what was the car's original speed before braking? I have used multiple modes to find

asked by Kirstie on October 22, 2014
56. ## Physics (Kinematics)

In the same instant that a Porsche races past him at 130 km/h, a speed cop gets off his motorcycle, accelerates uniformly at 8 m/s^2, to catch the speedster. After 5 seconds the trafic officer reaches his top speed, which he then maintains until he reaches

asked by Jonathan Nokhoya on March 10, 2016
57. ## Physics

16. A Nile cruise ship takes 21. 0 h to go upstream from Luxor to Aswan, a distance of 208 km, and 19.8 h to make the return trip downstream. Assuming the ship’s speed relative to the water is the same in both cases, calculate the average speed of the

asked by Emily on September 15, 2014
58. ## Chemistry/Physics

Calculate the translational kinetic energy of O2 at a) 300. K b) 1000. K Speed is not given. Do I need to find the average speed first? The formula I'm using is Ek= 1/2m v^2 I notice I'm not given mass in the problem either. Would I use molar mass? You are

asked by John on January 6, 2007
59. ## General Chemistry

An electron microscope employs a beam of electrons to obtain an image of an object. What energy must be imparted to each electron of the beam to obtain a wavelength of 15.2 pm? Obtain the energy in electron volts (eV) (1 eV = 1.602 10-19 J).

asked by M on January 18, 2010
60. ## physics

White light strikes a grating with 1300 lines/cm at normal incidence. How many complete visible spectra will be formed on either side of the central maximum? (Take the range of visible wavelengths to be 400 - 700 nm.) I used the equation d sintheta = m

asked by jay on August 20, 2007
61. ## Physics

On level ground, you stand 21.0m from the base of a tree and determine that the treetop is at 46 degrees above the horizontal, as measured from ground level. How tall is the tree?

asked by Tig on February 8, 2012
62. ## algebra

Average cost of a bicycle is modeled by the function c(x)=.1x^2-1.7x+10 where c(x) is measured in dollars. how many bicycles should be built in order to minimize the average cost per bicycle?

asked by mitch on November 16, 2011
63. ## science

A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 1.25 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?

asked by lily on March 22, 2011
64. ## math

Researchers discovered a large group of krib that was more than 30,000 feet long. About how long is 30,000 feet, measured in the number of krill?

asked by stephanie on September 12, 2011
65. ## Physics

Vector A is described as having magnitude -7 and angle 30degress. Which is an equivaent statement of magnitude and angle of vector A? (Note: All angles are measured counterclockwise from x-axis.)

66. ## chemistry

A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 1.55 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?

asked by Lili on October 12, 2008
67. ## physics

Consider two vectors where F1 = 31 N, F2 = 67 N,and theta 1 = 240 degrees and theta 2 = 25 degrees, measured from the positive x-axis with counter-clockwise being positive. What is the magnitude of the equilibriant?

asked by kathy on November 27, 2009
68. ## Math

Horses are measured in units called hands. One hand equals 1/3 foot. A horse is 5 1/3 feet tall. How tall is this horse in hands?

asked by Anonymous on March 22, 2015
69. ## chemistry

A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 2.35 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?

asked by chris on March 24, 2012
70. ## chemistry

A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 2.35 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?

asked by chris on March 24, 2012
71. ## Math

Leo measured the distance each of his four car rolled across the floor. Which car measurement that has a 4 in the thousandths place represents the shortest distance rolled ?

asked by AnnaChavez on September 16, 2015
72. ## chemistry

At high temperature, 2.00 mol of CH2O was placed in a 4.00 L container where it decomposed via the equilibrium CH2O(g)CO(g)+H2(g) . At equilibrium, the concentration of CO was measured to be 0.0317 M. What is Kc for this reaction at this temperature?

asked by alex on April 20, 2013
73. ## Math

Find the number of units that produces a maximum revenue. The revenue R is measured in dollars and x is the number of units produced. R = 80x – 0.0001x^2

asked by max on June 8, 2014
74. ## Physics

determine the point of zero gravitation force, as measured from the centre of earth (mass 5.97 x 10^24 kg) to the sun ( mass 1.99 x 10^30 kg) if the earth-sun distance is 150 x 10^6 km.

asked by S on February 13, 2016
75. ## Math

A fast growing mushroom doubled in size every day. After 30 days, it measured 6 inches tall. On which day did it measure 1 1/2 inches tall?

asked by Xman on August 29, 2014
76. ## biostatistic

Is this statement true or false: when calculating correlation coefficient between two continous variables, the scale on which the variables are measured affect the value of the correlation coefficient.

asked by nono on December 11, 2012
77. ## Math

Ella reports that the height of a tree in her school yard is 3.8m. If ella measured the tree to the nearest hundredth of a metre, what is the least height she might report?

asked by Anonymous on January 22, 2012
78. ## Physical Science

A dog is chasing a cat; the cat's velocity is "v". The dog's velocity is directed towards the cat at all times. The dog maintains a constant speed "v". At the instant when the velocity of the dogs "v" and the cats "v" are perpendicular the distance between

asked by Terra on October 4, 2006
79. ## Physics

A boy is cycling at a constant speed along a straight road to his school. The postions of the boy after fixed time intervals are observed. a. What type of position-time graph can be expected for the motion of the bicycle? b. How can the average velocity of

asked by Jon on April 15, 2008
80. ## chemistry 121

Microwave ovens use microwave radiation to heat food. The microwaves are absorbed by moisture in the food, which is transferred to other components of the food. As the water becomes hotter, so does the food. Suppose that the microwave radiation has a

asked by andrea on March 26, 2010
81. ## physics

1) Sound propagating through air at 30 degree Celsius passes through a vertical cold front into air that is 40 degree Celsius. If the sound has a frequency of 2400 Hz, by what percentage does its wavelength change in crossing the boundary? (2) What is the

asked by Sandhya on November 9, 2008
82. ## physics....

Suppose that the inside length of a microwave oven is 30 cm. If the length of a microwave oven is one half of the wavelength of microwaves used by the oven, find the frequency of the microwaves used in the oven. What is the equation that relates the three

asked by kennedy on June 13, 2012
83. ## Physics

Light of wavelength 550 nm strikes a single slit of width 1.00 x 10-5 m that is 100.0 cm away from a screen. The screen is 36 cm wide, with the central maximum falling exactly at its centre. How many dark fringes in total will be seen on the screen ? Count

asked by Anonymous on December 13, 2015
84. ## physics

It is desired to move a small, 50 kg cat in outer space by strapping a lamp, which emits 100 W of blue light to it. If the cat is free in space, and the wavelength of blue light is 470 nm, what would be the acceleration of the cat? (HINT: Consider how many

asked by Anonymous on January 22, 2012
85. ## Physical Geography

1-if a person's line of vision is at the top of Building 121 feet high, how far out to sea could a person see with a good telescope? 2- the light in a lighthouse is 144 feet above sea level. How far does the light extend before it dips below sea level? 3-

asked by matt on June 11, 2007
86. ## Chemistry

How do you find rate of production of Cl? If you are given the inital rate to be 3.54e-5 and given measured data of .052[HgCl2] and .300[C204]? The equation is 2HgCl2(aq)+ C204(aq) goes to 2Cl+ 2Co2(g)+ Hg2Cl2(s). I thought that you may take the initial

asked by Eliz on February 23, 2009
87. ## chem

A water solution which contains magnesium chloride as the only solute measured 232 parts per million chloride on an analytical instrument using a specific ion electrode as the sensor unit. When converted to moles per liter what value would you get for the

asked by Patty on February 12, 2009
88. ## Chemistry

You have 4.271 x 102 mL of oxygen gas (O2) at 7.656 x 102 mm of Hg and 78 oC. What is the mass of the sample in milligrams? When alcohol evaporates according to the equationC2H5OH(l) --> C2H5OH(g), how many liters of gaseous alcohol, measured at STP, are

asked by Tif on April 17, 2013
89. ## physics

As a protest against the umpire’s calls, a baseball pitcher throws a ball straight up into the air at a speed of 20.4 m/s. In the process, he moves his hand through a distance of 1.57 m. The acceleration of gravity is 9.8 m/s 2 . If the ball has a mass

asked by John on February 15, 2015
90. ## Math

7. Ben earns \$9 per hour and \$7 for each dilivery that he makes. He wants to earn more than \$120 in an 8-hour work day. What is the least number of deliveries he must make to reach his goal? A. 5 B. 6 C. 7 D. 8 E. 10 12. Mark went shopping with \$110 to

asked by Ariana on February 29, 2016
91. ## Math - Alg

1. The volume V of a right circular cylinder is given as V = pir^2h, where r is the radius of the base and h is the height of the cylinder. a. Express the height of the cylinder in terms of iuts volume and radius of the base. b. Translate the equation

asked by Marie Pierre on November 17, 2013
92. ## chemistry

The energy levels the electron can occupy in the H atom can be calculated using the energy level equation. Calculate the wavelength (nm) of the photon absorbed when the electron goes from a n= 1 energy level to a n= 3 energy level. Express answer in

asked by Chris on October 11, 2011
93. ## Physics

A plane is heading due south with an airspeed of 211 mph. A wind from a direction of 53 degrees is blowing at 17 mph. Find the bearing of the plane. (Note that bearings are measured from north, clockwise.) Round results to appropriate number of significant

asked by Michael on May 27, 2012
94. ## chemistry 121

Microwave ovens use microwave radiation to heat food. The microwaves are absorbed by moisture in the food, which is transferred to other components of the food. As the water becomes hotter, so does the food. Suppose that the microwave radiation has a

asked by andrea on March 27, 2010
95. ## physics

A 5.9 m wire with a mass of 79 g is attached to the mast of a sailboat. If the wire is given a "thunk" at one end, it takes 0.087 s for the resulting wave to reach the other end. 1. What is the tension in the wire? 2. Calculate the tension for a 89-g wire.

asked by Brienne on December 2, 2012
96. ## Waves & Tension

A 5.9 m wire with a mass of 79 g is attached to the mast of a sailboat. If the wire is given a "thunk" at one end, it takes 0.087 s for the resulting wave to reach the other end. 1. What is the tension in the wire? 2. Calculate the tension for a 89-g wire.

asked by Brienne on December 2, 2012
97. ## physics

A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 94.0 kg. The mass of the rock is 0.350 kg. Initially the wagon is rolling forward at a

asked by Sam on October 22, 2011
98. ## College Physics

Which of the following statements is false? 1)The velocity of an object can change while maintaining a constant speed. 2)An object that maintains a constant speed must have zero acceleration. 3)An object that has a non-zero acceleration must have a

asked by Bryce on October 4, 2010
99. ## PHYSICS

a)speed is the magnitude of instantaneous velocity. Is the average speed equal to the magnitude of the average velocity? Justify b)under what condition is the average equal to instantaneous velocity? c)a car travels 40 mph for 2 hrs and 60 mph for

asked by josh on July 26, 2010
100. ## physics

a person walks first a constant speed of 5.00m/s along a straight line from point A to point B and then back along the line from point B to A at a constant speed of 3.00m/s. (a) what is her average speed over the entire trip? (b) what is her average

asked by millie on January 27, 2010