# A model rocket is launched from a roof of a building. Its path is described by the relationship h=-5t*2+35t+10, where h is the height in metres and t is the time in seconds. How tall is the building? What is

13,356 questions, page 63
1. ## Statistics

A procedure in regression analysis where Predictor or Independent Variables are coded as 1 or 0 (representing categories) and can be used to produce ANOVA Tables under the General Linear Model is known as…?

asked by C on April 6, 2014
2. ## Psychology

17 Albert Ellis depicts the relationship between irrational belief and negative emotions through use of: a. a contingence contract. b. dialectrical theory. c.the A-B-C model. d. observational learning.

asked by Steven on December 9, 2013
3. ## algebra

You are going to the movies, movie tickets are \$10 for adults and \$8 dollars for children. The total amount of money that you can spend is \$80. Write an equation to model the situation. What are the x and y intercepts.

asked by Anonymous on January 25, 2016
4. ## economics

Given the economic situation today, outline the discretionary fiscal policy you would promote if you were president. In terms of the AD-AS model, explain how your policies would affect the economy.

asked by edna garcia on November 11, 2012
5. ## Bio organic chemistry

Explain how to use the valence shell electron pair repulsion model to predict the bond angles and geometry about atoms of carbon, oxygen and nitrogen

asked by Christelle on January 26, 2019
6. ## Biology

Why is the Hardy-Weinberg Theorem useful for studying evolutionary change? What are the assumptions of this model? How does it work (in other words, describe the procedure which is used and how you figure out genotype frequencies)?

asked by Sarah on October 8, 2015
7. ## english grammar help please

I'm a bit confused as to what I would use for this sentence: The first in line at the theater were ____ Would it be "them" or "us"? Along with: Karina and ___ are working together to build the model. 1) her 2) me 3) she 4) us If you could explain to me

asked by twiddles on May 17, 2016
8. ## Statistics

a procedure in REGRESSION NALYSIS WHERE PREDICTOR OR INDEPENDENT VARIABLES ARE CODED AS 1 OR 0 (REPRESENTING CATEGORIES) AND CAN BE USED TO PRODUCE ANOVA TABLES UNDER THE GENERAL LINEAR MODEL IS KNOWN AS?

asked by Jo on April 5, 2014
9. ## Algebra II

I have to make a scale model of Mt. Kilimanjaro using this linear function y=y= 34.63x + 2789.8 with these coordinates (0,1800), (6,2900), (18,3657), (24,4600), (48,4750), (96,5681). How do I do this?

asked by Nivea on January 1, 2012
10. ## physics

A pelican ﬂying along a horizontal path drops a ﬁsh from a height of 4.3 m. The ﬁsh travels 8.3 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s

asked by sabrina on January 11, 2014
11. ## physics

A pelican flying along a horizontal path drops a fish from a height of 4.7 m. The fish travels 7.7 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s

asked by marco on November 2, 2012
12. ## physics

A ball on the end of a string is revolving at a uniform rate in a vertical circle of radius 98.8 cm. If its speed is 4.60 m/s, and its mass is 0.345 kg, calculate the tension (in newtons) in the string when the ball is at the bottom of the path.

asked by george on March 12, 2012
13. ## physics

A pelican flying along a horizontal path drops a fish from a height of 5.0 m. The fish travels 8.5 m horizontally before it hits the water below. The acceleration of gravity is 9.81 m/s2 . a) What was the pelican’s initial speed? Answer in units of m/s

asked by annn on January 10, 2011
14. ## physics

A pelican flying along a horizontal path drops a fish from a height of 5.1 m. The fish travels 6.1 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s

asked by kaleb on October 7, 2012
15. ## physics

A pelican flying along a horizontal path drops a fish from a height of 3.1 m. The fish travels 8.4 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s

asked by Anonymous on October 30, 2014
16. ## physics

A pelican flying along a horizontal path drops a fish from a height of 5.0 m. The fish travels 8.5 m horizontally before it hits the water below. The acceleration of gravity is 9.81 m/s2 . a) What was the pelican’s initial speed? Answer in units of m/s.

asked by Anonymous on January 9, 2011
17. ## physics

A pelican ﬂying along a horizontal path drops a ﬁsh from a height of 3.1 m. The ﬁsh travels 6.6 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s

asked by Anonymous on October 14, 2012
18. ## physics

two student walk in the same direction along a straight path, at a constant speed one at 0.90m/s and the other at 1.90m/s assuming that they start at the same point and the same time, how much sooner does the faster student arrive at a destination 780m

asked by M on October 25, 2010
19. ## physics

A ball on the end of a string is revolving at a uniform rate in a vertical circle of radius 92.5 cm. If its speed is 4.50 m/s, and its mass is 0.335 kg, calculate the tension (in newtons) in the string when the ball is at the bottom of the path.

asked by kassy on October 10, 2016
20. ## math

The path of a cliff diver can be modeled by a parabolic curve. The regression equation matching one particular dive is h(t)= -4.9^2+4.6x+24.8 h is height t is time in seconds at what point in meters did the diver reach maximum height?

asked by sam on October 2, 2013
21. ## physics

A pelican ﬂying along a horizontal path drops a ﬁsh from a height of 3.1 m. The ﬁsh travels 6.4 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s

asked by Mara on September 18, 2012
22. ## physics

a juggler throws a ball with an initial horizontal velocity of +1.1 m/s and an initial vertical velocity of +5.7 m/s. What is its acceleration at the top of its flight path? make sure to consider the sign when responding. consider the upward direction as

asked by aimee on June 24, 2011
23. ## physics

A pelican flying along a horizontal path drops a fish from a height of 3.3 m. The fish travels 7.6 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s

asked by allan on November 6, 2014
24. ## Physics

A juggler throws a ball with an initial horizontal velocity of +1.1 m/s and an initial vertical velocity of +5.7 m/s. What is its acceleration at the top of its flight path? Make sure to consider the sign when responding. Consider the upward direction as

asked by Alexandra on September 13, 2014
25. ## physics

A pelican flying along a horizontal path drops a fish from a height of 4.7 m. The fish travels 7.7 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s

asked by marco on November 2, 2012
26. ## physics

A pelican ﬂying along a horizontal path drops a ﬁsh from a height of 3.3 m. The ﬁsh travels 8.7 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s

asked by Eva on August 31, 2012
27. ## Physics

A pelican flying along a horizontal path drops a fish from a height of 4.7 m. The fish travels 8.5 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s

asked by Kelly on October 12, 2011
28. ## charley

tinyurl--qwxgbv (The qwxgbv is after the slash) The proton moves through a magnetic field of magnitude 3x10^-5 T with a velocity of 4x10^5 m/s. Find the radius of the circular path the proton follows and indicate its direction of rotation.

asked by physics on May 27, 2009
29. ## Math - 3rd grade summer work

A Super-Duper ball bounces twice its height when it is dropped. Carl dropped a Super-Duper ball from the roof of a 12-foot garage. How high will the ball bounce after 5 bounces?

asked by Kay on June 22, 2014
30. ## WORD PROBLEM

A roofer's 30 FOOT ladder is against the side of a house. It is 8 YARDS from the ground to the top of the house. How far away from the house must he place the foot of the ladder in order to have the top of the ladder meet the roof of the house?

asked by Lin on May 13, 2015
31. ## S.S

What was significant about the role of the Green Mountain Boys? a. They launched a surprise attack on Fort Ticonderoga and defeated the British. b. They assisted Washington and his troops in launching a surprise attack in Trenton. c. They secured valuable

asked by Ras on October 19, 2016
32. ## Math

If the path of a frog's jump is approximated by the equation y = -0.25x2 + 5x, what is the height of the frog's jump?

asked by Susie on May 30, 2008
33. ## physics

Toby is jogging at a constant speed of 3 m/s along a winding path. He is accelerating even though he is going at a constant speed. how is this possible? please help..

asked by Aileen on February 17, 2015
34. ## english

We walked along the mountain path looking for unusual flowers. Looking for unusual flowers. what is the grammatical function

asked by kirstie on October 30, 2012
35. ## computer programming

Mr. Dacara owns 20 apartment buildings. Each building contains 15 units that he rents 5,000 PhP per month each. He wants a program that will print 12 payment receipt coupons for each of the 15 apartments in each of the 20 buildings. Each coupon should

36. ## physics

A circus performer decides to take his human cannonball act to the extreme. After being shot from a cannon, he soars over three ferris wheels and into a net. Assume that he is launched with a speed of 26.5m/s at an angle of 53.0 degrees, what angle does he

asked by Hakeem on November 17, 2014
37. ## Physics (URGENT!!!)

A sniper fires a bullet at 120 m/s at 30° above the horizontal from the roof top of a 35 m high parking garage. If the bullet strikes the level ground beside the parking garage: a) How long was the bullet in the air? b) How far from the base of the

asked by Corey Brown on May 2, 2014
38. ## Physics

A sniper fires a bullet at 120 m/s at 30° above the horizontal from the roof top of a 35 m high parking garage. If the bullet strikes the level ground beside the parking garage: a) How long was the bullet in the air? b) How far from the base of the

asked by Corey Brown on May 2, 2014
39. ## Physics A2 level Student

When I came new to As I was given these as homework after we did easy practise questions in class. I find this topic and all its worksheets easy except this one for some reason. I got every single one of these questions wrong and struggled and still do

asked by Help needed on September 19, 2018
40. ## Algebra

1. Draw an algebra tile model for the polynomial in simplified form: 8x^2 - 4x -3x^2 + 6 + 2x -7 8 big blue squares, 4 bars, 3 big red squares, 6 little yellow squares, 2 green bars, 7 little red bars; (is this correct?) 2.Study the diagram of algebra

asked by Anonymous on June 12, 2017
41. ## Philosophy

Symbolize these arguments and display truth trees to evaluate the resulting argument forms for validity. If the argument form is invalid, describe (in English) the conditions under which the premises would be true but the conclusion false. 99.32 There will

asked by Maggie on October 22, 2010
42. ## physics

A car travels along the curved path with radius of curvature p= 30m such that its speed is increased by at = (0.5e^t) m/s^2, where t is in seconds. determine the magnitudes of its velocity and acceleration after the car has traveled s = 18m starting from

asked by sw on April 5, 2011
43. ## physics

A car is travelling around a banked curve at a constant speed of 84.0 km/h. If the radius of curvature of the path is 67.0 m, and there is no friction between the car and the surface, at what angle (in degrees) should the bank be set at, relative to the

asked by S on October 15, 2018
44. ## physics

A projectile is launched from ground level at an angle of 45 degrees above the horizontal with a speed of 40m/s. It is aimed straight towards a high wall that is a horizontal distance of 120m away from the launch point. a) How much time will the projectile

asked by anna on March 8, 2016
45. ## English

Here are some more sentences I'd like you to check. Thank you very much. 1)If you are in the mountains, keep far (move away, stay away are possible?) from rocks and trees. I have always had backaches from not doing any sport (sports)/from not doing sport.

asked by Mike on February 20, 2011
46. ## math

At your school, the building is 20 feet tall, a tree's height is 252 inches, and the flagpole is 6 yards high. Which of the three objects casts the longest shadow?

asked by imili on June 7, 2018
47. ## College Algebra

How long would it take for a ball dropped from the top of a 400 foot building to hit the ground? Round your answer to two decimal places Use gravity formula

asked by Heather on January 25, 2012
48. ## math

A builder is building a rectangular deck with dimensions of 16 ft by 30 ft. To ensure that the sides form 90 degree angles, what shouls each diagonal measure? I'm confused on how to answer this.

asked by tim on April 6, 2009
49. ## social studies

nation-building began in Europe as a result of war and the A.end of Muslim rule. B.growth of cities. C.Black Death. D. Magna carta.

asked by GaLaXy.ExE hAs CoRrUpTeD aNd HaS cRaShEd on August 20, 2018
50. ## A.P. Economics

8. Which factor of production is represented by each of the following? An office building: An assembly line worker: A tree used to make paper: Unused soil: An artist: A student:

asked by Ami on August 6, 2009
51. ## logic and programing langage

Design a modular program that asks the user to enter the replacement cost of a building and then displays the minimum amount of insurance he or she should buy for the property.

asked by Dewayne on October 20, 2011
52. ## MCC

Design a modular program that asks the user to enter the replacement cost of a building and then displays the minimum amount of insurance he or she should buy for the property.

asked by Dewayne on October 20, 2011
53. ## Tiáº¿ng ANh

Tháº§y lÃ m giup em cÃ¢u nÃ y vá»›i áº¡. Make these sentences positive or negative or questions, using the verbs given in capitals and the past Simple. Of course we â€¦. The house ourselves. We donâ€™t know anything about building!

asked by Chu Phi HÃ¹ng on March 11, 2012
54. ## Science

A man drop a stone of mass 2kg room the top of a building of height 15m when it reaches the ground find its kinetic energy.

asked by Jatin on March 1, 2017
55. ## Biology

The lack of nutrients and molecular building blocks, cells not secreteing materials normally and improper ion balance are results of which organelle not functioning properly

asked by Alexis on October 16, 2013
56. ## Trigonemtry

The sun is 25° above the horizon. Find the length of a shadow cast by a building that is 100 feet tall (see figure). (Round your answer to two decimal places.)

asked by Lou on March 28, 2016
57. ## english

In Wells, The War of the Worlds which of the following explains what made the humans so complacent? 1 Early in the 20th century came the great disillusionment 2. It is not only distant from time's beginning but nearer its end 3.Its physical condition is

asked by Ann on August 15, 2014
58. ## Physics

a periscope is an optical instrument made of two plane mirrors inclined at an angle 45 with respect to the axis of the tube. an observer places her eye at point O. draw the path of a ray light issued from A. determine the position and the nature of the

asked by Sarah on February 11, 2017
59. ## physics

Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where horizontal axis is V and each unit is 0.5*10^-3 m^3, V1 = 1.0*10^-3 m^3 and V2 = 4.0*10^-3 m^3. The vertical axis is P(N/m^2); A is (1.0*10^-3,2.6*10^6), B is

asked by Justin on July 26, 2013
60. ## Algebra 2

Mrs. Burnett throws a ball innthe air with an initial velocity of 96 feet per second. The function f(t) = 96t - 16t^^2 represents the path of the ball. How high will the ball go? How long will it take the ball to reach the ground?

asked by Olivia on October 29, 2014
61. ## physics

a body travels half of its total path in the last second of its free fall from rest.what is the duration of fall . you have answered the question before but the answer my mam gave is 3.4sec but you have solved it to 1.4sec .plz solve it for me

asked by pavatharani on August 18, 2011
62. ## physics

Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where horizontal axis is V and each unit is 0.5*10^-3 m^3, V1 = 1.0*10^-3 m^3 and V2 = 4.0*10^-3 m^3. The vertical axis is P(N/m^2); A is (1.0*10^-3,2.6*10^6), B is

asked by Justin on July 28, 2013
63. ## ALGEBRA

The function h=t^2 +95 models the path of a ball is in the air. assuming the boy lives at sea level where h=0 ft, which is a likely place the boy could have been standing when he threw this ball? a. his backyard b. an underground cave c. a ladder d. a

asked by allexelle on April 12, 2015
64. ## physics

Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where horizontal axis is V and each unit is 0.5*10^-3 m^3, V1 = 1.0*10^-3 m^3 and V2 = 4.0*10^-3 m^3. The vertical axis is P(N/m^2); A is (1.0*10^-3,2.6*10^6), B is

asked by Justin on July 28, 2013
65. ## writing

explain how the path your life would take would be diffrent if school ended after 9th grade... well im just looking for a few ideas that could basically involve anyone. the only few things i could come up with are - moar school - getting job sooner and the

asked by qwerty on October 2, 2008
66. ## science

An electron of mass 9.11 × 10-31 kg and charge 1.6 × 10-19 C passes through a cathode ray tube with a velocity of 3.7 × 107 m/s. It enters a magnetic field of flux density 0.47 mT at a right angle. What is the radius of curvature of the path in the

asked by Anonymous on December 1, 2014
67. ## Physics

Henry walks 20 km west forgot his coat, so he turns and heads 13 km east. He decided to go another path to make up for the lost time and travels 30 km south and then moves west for 27 km. Calculate Henry's displacement.

asked by Sam on January 12, 2014
68. ## Math Trig

A plane's flight path called for it to fly from J to W. W is 200kms due North and 500kms due west of J. Draw a coordinate picture. What bearing will the pilot fly and what distance will he or she go in air kilometers?

asked by K on September 7, 2015
69. ## physics

1) What part of an object follows a smooth path when the object is made to spin through the air or across a flat smooth surface? 2) Describe the motion of the CG of a projectile, before and after it explodes in midair. 3) What is suggested by a star that

asked by anonymous on July 10, 2010
70. ## physics

1) What part of an object follows a smooth path when the object is made to spin through the air or across a flat smooth surface? 2) Describe the motion of the CG of a projectile, before and after it explodes in midair. 3) What is suggested by a star that

asked by anonymous on July 10, 2010
71. ## physics

Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where horizontal axis is V and each unit is 0.5*10^-3 m^3, V1 = 1.0*10^-3 m^3 and V2 = 4.0*10^-3 m^3. The vertical axis is P(N/m^2); A is (1.0*10^-3,2.6*10^6), B is

asked by Justin on July 25, 2013
72. ## Physics

A student is swinging a 9 kg ball in a circular path in the vertical plane. Consider the instant when the string is horizontal as the ball is on its way up as shown in the figure. At this instant, the instantaneous tangential speed is 6 m/s, and the radius

asked by Ashleigh on October 12, 2014
73. ## Physics

A two-stage rocket moves in space at a constant velocity of 4650 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1240-kg upper stage is 5640 m/s in the same

asked by Xavier on October 24, 2010
74. ## physics

A two-stage rocket moves in space at a constant velocity of 4800 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1290-kg upper stage is 5600 m/s in the same

asked by Tara on February 23, 2016
75. ## Chemistry

Hydrazine has the formula N2H4 and is used as a rocket fuel (e.g. for the Apollo moon rockets). It burns in the following reaction for which the enthalpy change is -583 kJ/mol. N2H4(g) + O2(g) → N2(g) + 2 H2O(g) Calculate the N-N bond enthalpy in

asked by Ruth on November 15, 2017
76. ## Physics

Suppose a space capsule with an astronaut inside is launched from the top of a tower at some angle above the horizontal. a)While the capsule is in free fall, what are the acceleration of the astronaut and the capsule? b)If the astronaut measures his

asked by Anonymous on September 6, 2011
77. ## Physics

A rocket in a fireworks display explodes high in the air. The sound spreads out uniformly in all directions. The intensity of the sound is 2.89 x 10-6 W/m2 at a distance of 127 m from the explosion. Find the distance (in m) from the source at which the

asked by Jena on December 5, 2006
78. ## physics

For a safe re-entry into the Earth's atmosphere the pilots of a space capsule must reduce their speed from 2.6 104 m/s to 1.0 104 m/s. The rocket engine produces a backward force on the capsule of 1.7 105 N. The mass of the capsule is 3800 kg. For how long

asked by kyoya on February 25, 2013
79. ## geography

What is the PRIMARY significance of the Brown v Board of Education of Topeka Supreme Court decision of 1954? A) It sparked years of nonviolent civil rights demonstrations in the South. B) It ruled that segregation in public schools violated the Fourteenth

asked by lakeeyah on March 21, 2019
80. ## US history

After dropping two atomic bombs on Japan, the United States: 1. accepted Japan’s surrender, albeit with the condition that the emperor could keep his throne 2. dropped a third one on Tokyo to force the Japanese to surrender 3. accepted Japan’s

asked by HM on November 13, 2011
81. ## History

what efforts did james hogg make to fix the corporate world in Texas? 1 allowed railroads to choose the path of the rail lines 2 created laws against monopolies 3 made his own insurance company 4 made it easier to start companies

asked by Ray on January 23, 2018
82. ## Math

1. Write the ratio in the simplest form. 50:10 (a) 25:5 (b) 10:2 (C) 5:1* (D) 1:5 2. Solve the following proportion. p/6=7/8 (a) p=5.25 (b) p=8 (c) p=10.5* (d) p=42 3. Chris's uncle has a model car. The model is 6 inches long and 3 inches wide. The actual

asked by Anonymous on November 15, 2015
83. ## physics- TEST TMRW PLS HELP!

In zero-gravity astronaut training and equipment testing, NASA flies a KC135A aircraft along a parabolic flight path. The aircraft climbs from 24 000 ft to 31 000 ft, where it enters the zero-g parabola with a velocity of 143 m/s nose high at 45.0° and

asked by Ania on October 18, 2012

Two 1.50cm -diameter disks spaced 1.80mm apart form a parallel-plate capacitor. The electric field between the disks is 5.10×10^5 V/m I got the voltage as =918 but B. How much charge is on each disk? _________C? and C. An electron is launched from the

asked by Josh on May 21, 2014
85. ## Science (physics)

A particle P is launched from a point O with an initial velocity of 60m/s at an angle of 30 degrees to the horizontal. At the same time, a second particle Q is projected in the opposite direction with initial speed of 50m/s from a point level with point O

asked by Joe on March 18, 2013
86. ## HELPPPP NOOWW !!!!!

Type the pronoun that correctly completes the sentence. Remember that you must spell your answer correctly to receive credit. Yes, the one who designed the house was (she, her). (Points : 1) Question 2. 2. Type the pronoun that correctly completes the

asked by kaila flowers on March 4, 2014
87. ## Trigonometry

A lean-to is a simple shelter with three walls, a sloping roof, and an open front facing away from the prevailing winds. The back wall is short compared to the front opening. If the lean-to at a campsite has a front opening that is 7.0 ft tall, a back wall

asked by Anonymous on October 21, 2015
88. ## Math

Write an inverse variation to model the situation and answer the question. Two rectangular fields have the same area, One measured 75yd by 60yd. If the other has a length of 72yd, what is its width?

asked by ThatImNeverChangingWhoIAm on May 26, 2018
89. ## Texas History

If a legislator supported a measure letting factories be built on a river in her home district but then reversed his decision when he worried about pollution being sent downstream, which model of representation would he be following?

asked by Hector on August 29, 2010
90. ## cal

Monthly sales, in thousands, of a new laptop computer grow according to the model N(t)=4.7te^-0.3t where t is the number after introduction. Determine the point of diminishing returns and interpret your answer.

asked by lis on November 30, 2016
91. ## Math

out of these variables which would and would not follow normal distribution. shoe size height age GPA model year of car how many friends on face book Please explain why..thanks

asked by Ella on June 9, 2012
92. ## psychology

Albert Ellis depicts the relationship between irrational belief and negative emotions through use of: A. A contingency contract B. dialectical theory C. The abc model D. Observational learning

asked by Sharon on October 1, 2012
93. ## algebra 1

please help. Write a linear equation in slope-intercept from to model the situation. A telephone company charges \$28.75 per mont plus .10 cent a minute for long distance calls

asked by kyle on December 20, 2012
94. ## Laser Diode Array

I have to develop a softawre tool using MATLAB to calculate the model distributions at each longitudinal position of the cavity of Phased Array Laser Diode.. I don't know how to start..

95. ## Maths

y = 3cos(3x)cos(10x) This function represents the displacement-time of a guitar string as it vibrates, the period of it is the beat frequency. What are the strengths and limitations of this model?

asked by Jen on March 7, 2016
96. ## physics

On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.9 times as far as he would have on earth, given the same velocities on both planets. The ball is launched at a speed of 54 m/s at an angle of 42° above

asked by Anonymous on October 19, 2010
97. ## Physics pls help

An electron is accelerated by a 6.4 kV potential difference. The charge on an electron is 1.60218 × 10^−19 C and its mass is 9.10939 × 10^−31 kg. How strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.1

asked by cr on April 14, 2011
98. ## physics

In a cloud chamber experiment, a proton enters a uniform 0.260 magnetic field directed perpendicular to its motion. You measure the proton's path on a photograph and find that it follows a circular arc of radius 6.38 . How fast was the proton moving?

asked by Anonymous on February 28, 2013
99. ## ochem lab

What is the expected observed rotation of a 9.1 x 10-5 M solution of compound X? Note: compound X has a specific rotation of [α]D20 = -49o and a molecular weight of 235.2 g/mol. In addition, the path length of the cell used to take the polarimetry

asked by cn on April 2, 2012
100. ## Intergated chemistry/physics

You are riding a 30 pound bicycle and you weigh 150 pounds. You are travelling at 20 miles per hour and fail to notice the 30 pound dog is in your path. If you transfer half of your momentum to this dog, what speed could he potentially reach?

asked by Laura on October 4, 2012