# Physics!

74,730 results, page 47
1. ## physics

A firefighter at street-level, 55.0 m away from a burning building, directs a stream of water from a fire hose at an angle of 35.0° above the horizontal. If the speed of the stream is 50.0 m/s, at what height will the stream of water strike the building?
2. ## Physics

0.75 mol of argon gas is admitted to an evacuated 40 cm^{3} container at 40 C. The gas then undergoes an isochoric heating to a temperature of 500 C. Before I forgot to write the question...so the question is What is the final pressure of the gas? *
3. ## Re: PHYSICS

"Relative" is an important word. Block L of mass mL = 1.90 kg and block R of mass mR = 0.500 kg are held in place with a compressed spring between them. When the blocks are released, the spring sends them sliding across a frictionless floor. (The spring
4. ## Physics

PLEASE SOMEONE HELP ME WITH THIS DARN QUIZ. I'm so lost and all my teachers are too 'BUSY' to help me. :/ I'm getting so sick and tired of studying and not getting it but then having to take the blame for my instructor's folly. 2. Which of the following is
5. ## As Physics

Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Calculate the number of free electrons
6. ## Physics

Make a predictive statement about the path dependence of accelerations due to gravity
7. ## physics

5. An object that has kinetic energy must have ____________________. A) momentum. B) acceleration. C) a force applied to it. D) All of these. E) None of these.
8. ## Physics

what is the mass of the toy truck if the force of friction holding it in place is 18.5N u= 0.2 at 30 degrees
9. ## Math Physics

What is the wavelength of an electromagnetic wave with frequency 50.0 MHz? Am I starting this problem like this? 3.00*10^8/50*10^6 =6*10^12
10. ## physics

The speed of a train increased from 15 mi/hr to 25 mi/hr in a distance of 500 ft. Calculate the average acceleration in ft/s2.
11. ## PHYSICS

a 1500kg sports car accelerates from 0 to 30 m/s in 8 seconds. Whaat is the power of its engine?
12. ## physics

A car starts from rest and accelerates for 8.7 s with an acceleration of 4.4 m/s 2 . How far does it travel? Answer in units of m.
13. ## physics

a mass if 10kg move with a velocity of 4ms-1find it kinetic energy.
14. ## Physics

Find speed of sound in air if distance is 170 meters and time is 1.1 second
15. ## physics

how many energy is transferred when 8.9g of liquid hydrogen changes to gas -253 degree celsius
16. ## physics

A car starts from rest and accelerates for 2.8 s with an acceleration of 2.1 m/s2. How far does it travel? Answer in units of m
17. ## PHYSICS

A 30 kg. balloon is filled with 100 m to the third power of helium. how much force is needed to hold it down?
18. ## physics

2) The weight of tank is 50 000 kg, area of his belts is 5 m2. What pressure acts on the ground?
19. ## Physics

A ball is thrown straight up at 24.0 m/s. Ignore the effects of air resistance in your calculations.After 2.00 s?
20. ## Physics

What is the direction of force of friction on a bicycle on front and back wheel while paddling?
21. ## physics

2) The weight of tank is 50 000 kg, area of his belts is 5 m2. What pressure acts on the ground?
22. ## physics

How much heat in KJ is needed to change 3.0 kg of ice at -10C into (superheated) steam at +150C ?
23. ## Physics

How would I find final velocity at the top of an inclined ramp with a given angle theta?
24. ## physics

An object accelerates uniformly from rest at a rate of 2 m/s2 for 3 s and then 5 m/s2 for 15 s. Find its final velocity?
25. ## physics

Why is there always a difference between the experimentally calcuated error for resistance, and the actual components tolerance value?
26. ## Physics

Write each number in scientific notation: 1) 15.01 ans. Is it 15.01 x 10 minus to the power of 2?? Am i wrong?
27. ## Physics

During takeoff, a plane goes from 0 to 50 m/s in 8s. What is its acceleration? Halos fast is it going after 5 s? How far had it traveled by the time it reaches 50 m/s?
28. ## physics

calculate the kinetic energy of a body of mass 2kg moving with a velocity of 0.1m/s.
29. ## Physics

if you push a wall with a force of 50N, the work you do is...... (a)500J (b)5000J (c)50J (d)zero
30. ## Physics

Find the force necessary to stop a 900 kg jetta traveling at +25 m/s in a time of 5.0 seconds.
31. ## Physics

What is net capacitance if maximum potential is 40 volt and instant charge is 60 coulomb.?
32. ## Physics

A car going 50 m/s undergoes an acceleration of 2 m/s^2 for 6 seconds what is the final velocity ? How far did it travel while it was accelerating?
33. ## physics

What average power is required for a runner with a mass of 80 kg to reach a speed of 8.2 m/s during a time of 1.8 s?
34. ## physics

In a certain right triangle, the two sides that are perpendicular to each other are 7.00 m and 8.30 m long. What is the tangent of the angle for which 7.00 m is the opposite side?
35. ## physics

A wheels is turned at prequency at 2.0 revelation per second and then is allow to come to rest. If it those so in 30sec ? How far did it turn in aprocess
36. ## physics

What is its acceleration just before and just after reaching this point? (Ignore air resistance.) a. less than g b. equal to g c. greater than g
37. ## Physics

What is the average power output of a weightlifter who can lift 260 kg to a height of 1.9 m in 1.8 seconds?
38. ## Physics

As one exhales, what change in energy takes place between the diaphragm and the air in the lungs?
39. ## Physics

Still stuck...see post at 3:34pm. I don't think I'm understanding the instructions regarding what #'s to use for sin and cos.
40. ## physics

How would you find the coefficient of kinetic friction if you're given a weight of 627 N and theta=45 degrees?
41. ## Physics

Find the uniform acceleration that causes's a car's velocity to change from 39.7 m/s to 74.0 m/s in an 5 second period of time.
42. ## physics

12.oo volt battery is connected in a series to 4 identical 5.00 ohm resistors what is the current
43. ## Physics

An object is thrown upwards with a speed of 14.0 m/s. How long does it take to reach its maximum height
44. ## physics

an aluminium sphere of 20cm diameter is heated from 0¡ãc to100¡ãc. what is the change in its volume?
45. ## physics

What is the frequency of the microwaves in a microwave oven? The wavelength is 12 cm. I have to give the answer in GHz
46. ## Quick Physics Question

Are both linear and angular momentum conserved in static equilibrium ?
47. ## physics

Work out the gravitational potential energy of a 2kg brick at a height of 9 metres.
48. ## Physics

Two parallel forces of magnitude 4 and 6 newton are acting on a body placed at 4m apart. Resultant force will be
49. ## physics

meteoroid is speeding through the atmosphere, traveling east at 17.0 km/s while descending at a rate of 11.7 km/s. What is its speed, in km/s?
50. ## Physics

What is the normal force when a 40 kg person jumps and is accelerating at 3 m/s2 upward while in contact with the ground?
51. ## physics

how high must a 2 kg basketball be thrown so that the top of its arc, it has a potential energy of 160J?
52. ## physics

2) The weight of tank is 50 000 kg, area of his belts is 5 m2. What pressure acts on the ground?
53. ## physics

What is the average current through a conductor that carries 4 375C during a 2 min time period?
54. ## Physics

The parabolic TV antenna receives electromagnetic waves from satellites. What is special about these rays?
55. ## physics

the two crates 40-kg and 60-kg are to be accelerated upward to a ship at the rate of 0.30-m/s2 determine the tension in each rope ?
56. ## physics

An arc lamp operates at 80V . suggest a method to use it with 240 V d.c. source
57. ## physics

An arc lamp operates at 80V . suggest a method to use it with 240 V d.c. source
58. ## physics

What is the gravitational potential energy of a ball with a weight of 72 N when it is sitting on a shelf 1.4 m above the floor?
59. ## Physics

What is the normal force when a 40 kg person jumps and is accelerating at 3 m/s2 upward while in contact with the ground?
60. ## Physics

What is the rotational inertia of a 10 kg rod with a length of 0.9m and rotating about an axis passing through its end?
61. ## physics

when looking at a window, you see two reflected images slightly displaced from eachother. Why/ Is it because glass is more dense.
62. ## physics

What are the factors that affect the quantity of heat needed to raise the temperature of a substance?
63. ## Physics

A cooking pot contains 0.8kg of water at 100degree celcius what is the specific heat
64. ## Physics

what do you call the source of an intense narrow beam of coherent monochromatic light?
65. ## physics

What force is needed to accelerate a child on a sled with the total mass of 43kg at 1.5m/s
66. ## physics

In what direction and with what speep must he push away his pack in order to return to his vehicle in 30s?
67. ## Physics

How long does it take a car to change it velocity from 15m/s if it accelerarate uniformly at 5m/s square?
68. ## Physics

A car travelled at an average speed of 200km/h. What distance does it cover in 10minutes.
69. ## physics

A wheel has turned through 120 revs in 10 s after starting. find the angular acceleration.
70. ## Physics

If 9.30 x 10^5 J of energy are transferred to 2.00kg of ice at 0 deg C, what is the final temperature of the system?
71. ## Physics

A meteoroid is speeding through the atmosphere, traveling east at 19.0 km/s while descending at a rate of 12.9 km/s. What is its speed, in km/s?
72. ## physics

Start from the origin and go east for 80km. Then go north 192 km. Make a drawing.

74. ## Physics

A car is traveling North. In which direction are the wheels turning. This is under the torque chapter
75. ## Physics

A meteoroid is speeding through the atmosphere, traveling east at 14.8 km/s while descending at a rate of 12.5 km/s. What is its speed, in km/s?
76. ## Physics honors

If a racer runs at an average speed of 7m/a how far will she run in 1 min 45 seconds?

78. ## physics

What are the dangers associated with electricity in your home? What can be done to limit or prevent the possibilities of dying or getting hurt?
79. ## Physics

Find the longest wavelength by resonating air in 20 cm tube which is opened both ends
80. ## physics

If a solid is stretched or compressed beyond the point that it can return to its original shape it has passed its
81. ## Physics

1. Name three different kinds of graphs that are often used to plot information and discuss the value of each. i have no idea what the heck this means
82. ## physics

If one walks straight up a 10 degree incline, what is the height achieved after walking 10 kilometers ?
83. ## physics

How much heat (in kJ) will it take to bring 56 kg of ice at -8°C to dry steam? Answer to 3 significant figures
84. ## PHYSICS/MATH

What is your average power if you lift a 33.8 kg box at a constant speed to a height of 3.27 m in 6.10 s?
85. ## physics

If a coffee can has a radius of 63.0 cm and a height of 15.8 cm find its volume round to neaerest cm3
86. ## physics

what is the greatest acceleration can be generated by a runner if coefficient of friction between shoes and road is 0.95
87. ## Physics

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

calculate the net force required to give a 3000kg trucks an acceleration of 2.5m/s^2
89. ## Physics

A bicycle with tires .064 m in diameter travels 8.1 km. 1. How many revolutions do the wheels make?

91. ## physics

How close must two electrons be if the electric force between them is equal to the weight of either at the earth's surface?

93. ## physics

If an arrow is fired at 200km/h horizontally, about how long will it take to strike a target 30 meters away?
94. ## PHYSICS

A girl rows 10 km downstream in 2 h. Her return trip takes 3 h. How fast is the current. in km/
95. ## physics

Can an adult male be rescued from a fall by tying a rope to a car's axle?
96. ## Physics "scientists"

* JJ Thomson * a) How does his experiment of cathode ray tube relates to electrostatics? >> PLEASE HELP ME!! :( :)
97. ## Physics

Two electrons exert a force of repulsion of 0.96 N on each other. How far apart are they? The elemental charge is 1.602 × 10 −19 C .
98. ## physics

What is the evidence for the claim that iron exists in a relatively cool outer layer of the sun?
99. ## Physics

How much work must be done to bring three electrons from a great distance apart to 1.0 * 10^(-10)m from one another (at the corners of an equilateral triangle)?
100. ## Physics

What distance does Anna covered by running on a circular track of length 500m?