# Math/Physics

214,834 results, page 48

1. ### Physics (HELP)

An object inside of the focal point of a concave mirror produces an image that is...
2. ### physics

Calculate the angular velocity of a swinging pendulum whose length is 125cm
3. ### Physics

the mass of an airplane is 1.81x10^5 kg. if the gravitational potential energy is 3.78 x 10^7 J, how high did it fly?
4. ### Physics

From the standpoint of energy and power, what are the advantages for a car with high horsepower? What are the disadvantages?
5. ### Physics

What precaution we should take while doing the experiment to understand the nature of friction
6. ### Physics

The body mass is 0.4kg , its hung on a spring with stiffness of 90 N/m What is the frequency of its oscillation?
7. ### Physics

The body mass is 0.4kg , its hung on a spring with stiffness of 90 N/m What is the frequency of its oscillation?
8. ### physics

A stone is dropped from a ledge 45m high. What will its speed on reaching the Earth be?
9. ### physics

find the magnitude and dirction of the resultant force of two perpendicular forces F1=3N and F2=4N
10. ### physics

Describe an experiment to determine the boiling point of a small quantity of a liquid
11. ### physics

Pls what is the specific of water? Is think is 4200 but my mates are saying it's 4180
12. ### Physics

What are the strength of intermolecular forces of mythelated spirits ,acetone ,water and ethanol?

1) A roller coaster (398 kg) moves from A (3.82 m above the ground) to B (29.4 m above the ground). Two non-conservative forces are present: friction does -1.82 x 104 J of work on the car, and a chain mechanism does +5.49 x 10^4 J of work to help the car up a long climb. What ...
14. ### Physics check

A speeder traveling at 41 m/s passes a motorcycle policeman at rest at the side of the road. The policeman accelerates at 3.3 m/s2. To the nearest tenth of a second how long does it take the policeman to catch the speeder? Im sorry I am new to physics this is my first year and...
15. ### Math

Camilles math teacher described a quadrilateral with 2 pairs of parallelvsides and 4 lineage of symmetry. Which of these quadrilaterals must have the characteristics that Camilles math teacher described? A. Trapeziod B. Square C. Rhombus D.parallelogram
16. ### Math

Mario has a ribbon that is 5/8 yard long if she cuts her ribbon into 6 equal pieces what will be the length of each new pieces? I really need some help this test i'm doing has 50 math questions. And i'm really bad at math.
17. ### Math

Ten students took a math exam. As the teacher evaluated the math exams, she noticed that 8 of the ten students scored above the median. Is this possible? Why I am leaning towards yes it is possible. Kinda confused
18. ### math

During one school year, Billy Bob earned \$25 for each Math test he passed and was ined \$50 for each Math test he failed. By the end of the school year, Billy Bob passes 7 times as many Math tests as he failed and he had a total of \$375. How many tests did he pass?
19. ### English

At school, he learns 10 subjects such as math, science, social studies, computers, ethics, etc. He is in math class now. He has a cell phone. He is sitting at the back. One of his friends calls him and asked "Which class are you in?" What is the answer to the question. 1. I'm ...
20. ### Math

I'm studying to take a math placement exam and it has been a long time since I've taken a math class. Can someone please give me a step to step solution of these: A.Simplify: 8x/[2^(x-1)] Answer = 2^(2x+1) B.Simplify: (2^x)*[4^(x-1)] Answer = 2^(3x-2)
21. ### math

Please help me with this problem: Jhon missed 5 points out of 100 points on his math test. What decimal number represents the part of his math test he answered correctly? my answer is 0.95. my work: 100-5=095
22. ### Math

There are 356 rows of tress growing in the field. There are 299 trees in each row. How many trees are growing in the field? Please help am stuck on this last math problem not good at the type of math problems.
23. ### Math

If I spend t hours every night on my homework and 1/4 of the time studying math, what equation can I write to represent the number of hours I will spend doing my math homework during the next 5 days?
24. ### physics

gravational force deimos, a satellite of amrs, has an average radius of 6.3 km. If the gravational force between deimos and a 3.0 kg rock at its surface is 2.5x10(-2)N..what is the mass of deimos ? Use the Universal Law of gravitation: Force= G Mm/distance^2 Solve for M. i did...

In a physics laboratory experiment, a coil with 170 turns enclosing an area of 10cm^2 is rotated from a position where its plane is perpendicular to the earth's magnetic field to one where its plane is parallel to the field. The rotation takes 5.0×10^2 s . The earth's ...

Distruive interference? Unless you put C in the line between A and B, this the asnwer is at infinity. Now on the line between A and B, the distance from A to C has to be an odd multiple of halfwavelength greater than C to B. Now, the distance between the speakers is two ...
27. ### Math

You are a letter and now your in a math problem explain to the numbers what your purpose is, how you are a friend, and how you solve algebra problems. Create a math problem and solve it. Use the letter and the number as the characters. Please tell me that this is not a ...
28. ### Math

I lost my paper for the Math Riddle Pizazz page 167 about solving systems of equations and I no longer have the problems. (It is the "did you hear about the farmer who gave birdseed to his cows..." page) What are the math problems for it?
29. ### math final studying

beth scored 75 on her first math test. she scored 20 % higher on her next math test. what did she score on the second test?
30. ### Math

I don't remember sampling methods... i do know that there are three and one of them is litteraly called 'random'. if i can please be reminded of the methods i can finish the last 3 problems of my math.... i don't like math especially if you have a field reading test for the ...
31. ### PHYSICS

Long, long ago, on a planet far, far away, a physics experiment was carried out. First, a 0.250 kg ball with zero net charge was dropped from rest at a height of 1.00 m. The ball landed 0.350 s later. Next, the ball was given a net charge of 7.60 muC and dropped in the same ...
32. ### math, algebra

what are some challenges about working with rational expressions? Math is a language. Getting it precisely right is a lot easier than describing it in a vague statement in English such as you ask. Is there a chance you can change teachers? If so, I recommend it. THe focus of ...
33. ### Math

Sorry if this is a lot of questions but What do you hear when you hear the word math? What do you believe when you hear the word math? What do you think when you hear the word math?
34. ### Math

Hi again, I don't know how to solve this problem. cube root of(cube roof of(x-1)-1) It would be ninth root of 1/(x-1) Thank you. Do you think you can explain to me how did you solve it? what are your feelings about math, rate your math anxiety, and describe what coping ...
35. ### Math

I have trouble with math, I'm very good at science and when I grow up I want to be a zoologist, the problem is that. MATH I try to pay attention at school but the teacher is very boring and I'm one of those people that can't pay attention when bored. Any tips?

A person is riding a bicycle, and its wheels have an angular velocity of 26.0 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 17.6 revolutions. (a) How much time does it take for the bike ...
37. ### PHYSICS

Could u help with physics hw! i keep trying but i keep getting the wrong answer? a 71g autographed baseball slides off of a 1.3 m high table and strikes the floor a horizontal distance of .83m away from the table. 1.how fast was it rolling on the table before it fell off? ok ...
38. ### Math (Combinatorics)

40 students attended the brilliant summer camp at Stanford University. "k" of the students at the camp are working on math problems and the others are working on non-math problems. One of the camp mentors noticed that whenever all the students were partitioned into 2 or more ...
39. ### physics

Hi, I am confused about physics, more specifically force. I know that the formula for force is: f=ma So what if an object traveling at constant speed (acc equals zero) collides with a wall? How would you calculate the force, since there is no acceleration? There IS force upon ...
40. ### statistics

The box plot below summarize the distributions of SAT verbal and math scores among students at an upstate New York high school. 300 400 500 600 700 800 data Whic of the following statements is false? 1. The range of the math scores equals the range of the verbal scores. 2. The...
41. ### English

1. learning subjects: English, math, science, etc. 2. subjects to learn:English, math, science, etc. 3. studying subject:English, math, science, etc. 4. subjects learning:English, math, science, etc. 5. taking subjects:English, math, science, etc...
42. ### MATH

I get really confused with math . I am great with all of the other subjects . In fact I get all B's except for Math , I get 1's !!! I really need help with it . I ask for help but whenever people help me and put it in the most simplest way possible .. I still don't get it . I ...
43. ### math/What is a interval in math terms?

doe sanyone know what a interval is in math terms? i need the real definition and it is hard and i can not find it anywhere? can anyone help me? thanks,you rule Kayla an interval is "a mathmatical expression of 'betweeness' a---------b or a<x<b this can also be written ...
44. ### Physics

An airliner is at point A and is trying to fly to point B, which is 1000 km due North of point A. The pilot of the airliner wishes to reach point B in 2.5 hr. A wind is blowing from the Northwest (45 degrees) at 100 km/hr. In what direction and at what speed must the pilot fly...
45. ### Math

I need help with my math homework.I searched for homework help forums and I found the Jiskha Website on the Google Website so this is my first time.I am new. Math Homework: What is the value of number 3 in 2,539? What is the value of number 9 in 4,879 What is the of number 6 ...
46. ### Math

John has scores of 88,73,90,85,93 on five math quizzes. What scores must john earn on the next math quiz to have a mean quiz score of exactly 88?
47. ### Math/Physics

An electron's position is given by r = 4.00t i - 6.00t^2 j + 5.00 k, with t in seconds and r in meters. In unit-vector notation, what is the electron's velocity? (Answer in terms of i, j, k, t.)What is v in unit-vector notation at t = 8 seconds? What is the magnitude of v at t...
48. ### math

Decide which variables described is likely to have a normal or near normal distribution a. the number of courses remaining until graduation for the students in a small liveral arts college b. the SAT math scores for students in an advanced placement math class i think the ...
49. ### physics

Answer the following question:Be sure to show all work. Include formulae and units.Be sure to include relavant, meaningful diagram and a complete circuit diagram with circuit related problem. take enough space, don't try to squeeze everything on a small space!(problems are ...
50. ### AP Physics

Using what's only in chapter one The Nature of Science Models, Theories, and Laws Measurement and Uncertainty; Significant Figuers Units, Standards, and SI System Converting Units Order of Magnitude: Rapid Estimating Dimensions and Dimensional Analysis How am I suppose to ...
51. ### active physics

a 25 mewton force pushes against a 5 kg. mass. what is the acceleration??? what formula do i use?? F=ma
52. ### Physics II

How much work (in joules) is done in moving a charge of 2.5μC a distance of 35 cm along an equipotential at 12~V?

54. ### physics

If a car travels westward with a constant velocity of 20 m/s, what is the net external force acting on it?
55. ### Physics

2.A 4430 kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers?
56. ### Physics

2.A 4430 kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers?

HOW WOULD YOU integrate this equation between zero and pi/2 1/(1+(tan^2008)xdx
58. ### Physics

How does the idea of magnetic fields arising from circulating currents relate to permanent magnets?
59. ### Physics

How does the idea of magnetic fields arising from circulating currents relate to permanent magnets?
60. ### Physics

What is the number of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to 1.00×104 Hz?
61. ### Physics

i cant get this right. what is the measured resistance of a 1000ohm, 500ohm and a 100 ohm resistor. and there % error
62. ### Physics

A 4610 kg helicopter accelerated upwards at 2 m/s^2. What lift force is exerted by the air on the propellers?
63. ### Physics

Displacement is to distance as velocity is to: a. acceleration b. mass. c. speed. d. time I chose C....is this correct?
64. ### Science-- Physics

Does an object need to have a velocity of 0 meters per second to be in equilibrium and why/why not?
65. ### Physics

How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.8 µC?
66. ### Physics

How do the mainsail and the jib of a sailboat help the boat sail? What do these two sails have to do with force?
67. ### Physics

Aircraft with acceration of magnitude of 42.5 m/s. If starting from rest how long will it take to travel a 2.6 km runway?
68. ### Physics

Why are the armature and field windings of an electric motor usually wound on an iron core?

70. ### physics

does a ball moving at a constant speed around a circular track produce acceleration?
71. ### physics

In a red glass filter, of the colors that make up white light, which if any are reflected or absorbed?
72. ### Physics

what is the purpose of the double bell jars that surround the international prototype of the kilogram in Paris?
73. ### Physics

If you are viewing a hologram and you close one eye, will you still perceive depth? Explain.
74. ### physics

lenses that always diverge light rays that strike them is that convex or concave? I am not sure.
75. ### Physics

Explain how the photoelectric effect is used to open automatic dooes when someone approaches.
76. ### physics

Calculate the force of gravatational attraction between two spheres of mass 10.1 kg and 45.4 kg that are 38.5 m apart. F = G(m1)(m2)/r^2 = 6.67 x 10^-11(10.1)(45.4)/38.5^2 = 2.06 x 10 ^-11 N
77. ### Physics check

In 1923, Robert Millikan won the Nobel Prize for discovering the mass of the .... electron?
78. ### Physics check

The two quantities conserved in all nuclear equations are....... mass and number?
79. ### Physics

If the third harmonic of a standing wave in a vibrating string is 600 Hz, what is the fundamental frequency?
80. ### physics

Does an object need a net force acing on it in order to move at constant velocity?
81. ### Physics

A student photographs a 18cm flower so it fills half of a 24mm slide. What is the magnification?
82. ### Physics

Two identical charges are 36 mm apart. The electrostatic force between them is 1.3 N. What is the size of each charge?
83. ### college physics

the speed of light is about 3.00 x 10^8 m/s. convert this figure to miles per hour

im not procrastinating i really don't understand it. im not asking for the answers im just asking for a little more help??
85. ### physics

can anyone give me a site that "best explains" about Rotational motion/Angular. thanks a lot.. :)
86. ### Physics

can anyone give a site that have problems about pressure with solution.. urgently needed.. thanks :)
87. ### physics

What is the evidence for the claim that iron exists in a relatively cool outer layer of the sun?
88. ### physics (emergency!)

How much work is required to stop an electron (m = 9.11 10-31 kg) which is moving with a speed of 1.99 106 m/s?

What force is needed to accelerate a 10 kilogram shopping cart 3 m/s^2 (squared)?
90. ### PHYSICS

lIST THE PARTICLES THAT MAKE UP AN ATOM. wHAT ARE THEIR CHARGES? hOW ARE THEY ARANGED? wHAT IS THE APPROXIMATE AMU OF EACH PARTICLE?
91. ### Physics

List the particles that make up an atom. What are their charges? How are they arranged? wHat is the approximate amu of each particle?
92. ### physics

An object experiences an impulse, moves and attains a momentum of 200 kg m/s. If its mass is 50 kg, what is its velocity?
93. ### physics

Why can't you put your heels firmly against a wall and then bend over without falling?
94. ### Physics

What are some possible uses for gelled methanol and why was it never used as a fuel in transportation?
95. ### Physics

If 2.4 m3 of a gas initially at STP is compressed to 1.6 m3 and its temperature raised to 30oC, what is the final pressure?
96. ### physics

If an 80kg sprinter can accelerate from a standing start to a speed of 10 m/s in 3 s, what average power is generated?
97. ### Physics

What is the work required for a 1000kg truck to increase in speed from 30 m/s to 40m/s? Is the answer 350 kJ?
98. ### Physics

What Net Force is necessary to give a 2.0 kg mass initially at rest an acceleration of 5.0 m/s^2? Is the answer 10. N?
99. ### physics

how much work can a 50.0kg wreckin ball traveling at 5.00m/s do when striking a building
100. ### Physics

How does mass affect the motion of objects falling freely under the influence of gravity?