# Math/Physics

214,834 results, page 49

1. ### Physics

How can you easily increase the magnetic field strength inside a current carrying coil?
2. ### Physics

What is the de Brogile wavelength of an electon that strikes the back of the face of a TV screen at 1/10 the speed of light?
3. ### Physics

A cube of ice weighing 18 grams sublimes into vapor. How many liters of gas will you get?
4. ### Physics

What does shifting the phase between the sources in a double slit experiment do to the interference pattern?
5. ### Physics

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

Could someone tell me the formula for finding distance when time is given and the acceleration is constant?
7. ### Physics

What is the value of a if the object is moving with constant velocity? What does this equation reduce to in such a case?
8. ### physics

The acceleration of a certain rocket is given by a=bt where b is positive cnstant, find the position function Xo and Vo at t=o?
9. ### Physics

The acceleration of a certain rocket is given by ax=bt where b is positive constant, find the position and velocity at t=5.0s if Xo=0 and Vo=0 and b=3.0m/s^3?
10. ### physics

Is it possible to calculate the torque acting on a rigid body without specifying the origin?
11. ### physics

A 1100 kg sports car accelerates from 0m/s to 33m/s in 13s What is the average power of the engine?
12. ### physics

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

14. ### physics

A 1.5 volt battery will increase the potential energy of ________________ coulombs of charge by 0.18 joules.
15. ### physics

What happens when you walk across a carpet and receive a shock when you touch a metal object.
16. ### physics

A particle at rest undergoes an acceleration of 2.1 m/s2 to the right and 5 m/s2 up. a) What is its speed after 7.9 s? Answer in units of m/s.
17. ### physics

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

If the change in position Dx is related to velocity v (with units of m/s) in the equation Dx = Av, the constant A has which dimension? a. m/s^2 b. m c. s d. m^2 I chose b?
19. ### physics

How can you easily increase the magnetic field strength inside a current-carrying coil?
20. ### Physics

How does the idea of magnetic fields arising from circulating currents relate to permanent magnets?
21. ### physcal science/physics

what is the kinetic energy in joules of a 1000 kg car travelling at 90km/h
22. ### Physics

What is the de Broglie wavelength of an electron that strikes the back of the face of a TV screen at 1/9 the speed of light?
23. ### Physics

Thanx DRWLS! Worked like a charm and I checked behind myself with the same formula!!!
24. ### Physics

Another one, sorry! =P This stuff is really confusing.. Why doesn't friction depend on surface area?
25. ### physics

how many electrons must be removed from an electrically neutral silver dollar to give a charge of +2.8 uc
26. ### Physics

At what temperature is the rms speed of helium molecules half its value at STP (0 C}, 1.0 atm)?
27. ### physics

if a block of wood dropped from a building has attained a velocity of 78 m/s how long has it been falling?
28. ### Physics

what is the mass of hydrogen peroixide, H2O2, in 350 grams ofa 20% by weight solution?
29. ### Physics

A mass of gas has a volume of 380 cm3 at a pressure of 560 mm Hg and a temperature of 7C. What is its bolume at s.t.p.?
30. ### physics

how much energy is gain by an electron accelerated through a potential differenc of 30000v?

what is the index of refraction of a medium in which the speed of this radiation is 2.54X10^8 m/s? I don't even know where to start...
32. ### physics

Determine the percent error in this approximate value. (There are 365.24 days in one year.)
33. ### 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 ?
34. ### Physics

What experiment can be used to prove that the value of gravity near the earths surface is constant ie. 9,8m.s
35. ### physics

A crane lifts 1 tonne of concrete through a height of 25 m. How much work does it do? (1 kg has a weight of 9.81 N.)
36. ### Physics

Describe the acceleration time graph of a car traveling forward and applying its brakes.
37. ### Physics

How does the conservation of mechanical energy explain why a planet in an elliptical orbit changes speed?
38. ### physics

A 1300 kg sports car accelerates from rest to 90 km/h in 7.0 s. What is the average power delivered by the engine?
39. ### PHYSICS

A race car's velocity increases from 3.6 m/s to 32.4 m/s over a 5-s time interval. What is its average acceleration?
40. ### Physics

At a spot in the ocean, the surface irradiance is 7.8*10^16 photons and k=.14 m^-1. At what depth does the euphotic zone end?
41. ### Physics

What's the tangential acceleration of a freely swinging pendulum when it makes an angle θ with the vertical?
42. ### physics

How much energy is produced when the sun converts one kg of hydrogen into helium?
43. ### SCIENCE

Didn't mean to ask but i was really curious and didn't get an answer from researching.Why is physics necessary in becoming a dentist?
44. ### physics

Good job "Drwls", your answer to my bowling ball question worked. Way to go!
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. ### Physics

A positive and a negative charge, each of magnitude 1.0 10-5 C, are separated by a distance of 12 cm. Find the force on each of the particles
47. ### Physics/ optics

An object is located 25cm in front of a +6.00 lens, where is the image? is it real or virtual?
48. ### Physics

In a hydrogen atom, if the radius of the orbit of the electron is doubled, then its energy will ... >> Increase by a factor of 2??
49. ### physics

pls what is the formula for calculating period given gravity, mass and length of the material
50. ### Physics

What is the difference in blood pressure between the head and feet of a person of height 171 cm?
51. ### PHYSICS

If the current in a 100 mH coil changes steadily from 25.0 A to 10.0 A in 375 ms, what is the magnitude of the induced emf?
52. ### PHYSICS

What is the inductance L of a 0.40 m long air-filled coil 3.2 cm in diameter containing 10,000 loops?
53. ### physics

what is the most important element for creating a magnetic field. and why? Moving charges..... right?
54. ### physics

do all electrons ejected from a metal surface have the same kinetic energy?
55. ### physics

How much work must be done to increase the speed of an electron from 0.200c to 0.210c? In (MeV)
56. ### Physics

How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.0 ìC?
57. ### physics

if the piston is in thermal equilibrium but the it is pushed inward, can there be a change in temperature(increase) even if Q=o
58. ### Physics

What is the strength of the magnetic field a distance of 1 meter from a wire carrying a current of 1 A? B=MoI ------ 2(pi)r Mo=4(pi)x 10^-7 I=1 A How do I know what r is?
59. ### physics

Hi, How can you charge an electroscope negatively? Is it by using a positively charged rod? Can someone please help me? Thank you :)
60. ### physics

Suppose a rock fell off a cliff. After 5 seconds, its speed well be 100 m/s
61. ### Physics

What is the centripetal acceleration of a skater moving with a tangential speed of 2.0 m/s in a circular path with radius 2.0 m?
62. ### physics

A constant net force of 1500 N gives a toy rocket an acceleration of 2.5 m/s2. what is the mass in kg?
63. ### Physics

If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees?
64. ### Physics

If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees?
65. ### physics

An automobile driver puts on the brakes and decelerates from 30.0 m/s to zero in 15.0 s. What distance does the car travel?
66. ### Physics

a runner moving at a speed of 5.60 m/s rounds a curved track with a 60.0 m radius. what is the runners acceleration?
67. ### physics

A plastic bobber just barely floats in water. If it weighs 2N in the air, what is its volume
68. ### Physics

While riding her bicycle, she goes from a full stop to 9m/s in 3 minutes. How fast is she acclerating?
69. ### physics

please shelp me with this problem what is the stopping potential (V) if the wavelength of the incident light is 400 nm??
70. ### Physics

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

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

The space shuttle traves in orbit at 210000 km/hr. How far will it travel after 5.0 hrs?
73. ### physics

if you jump upward with a speed of 2mls, how long will it take before you stop rising?
74. ### College Physics

What is the work required to move a proton 1 cm along the 7 volt equipotential line?
75. ### physics

In the ideal case of zero resistance, a ball rolling on a level surface will accelerate
76. ### Physics

Absolute temperature is proportional to the average kinetic energy of the atoms. True or false?
77. ### physics

A car travels in a straight line for 4.5 h at a constant speed of 61 km/h . What is its acceleration? Answer in units of m/s2.
78. ### physics

By how much does the speed of a vehicle moving in a straight line change each second when it is accelerating at 4 m/s2?
79. ### physics

8. Before you drop a ball held at a height of 5m with a weight of 20 N, what is its gravitational potential energy
80. ### physics

Is it possible for a frictional force to increase the mechanical energy of a system? If so, give examples.
81. ### physics

what is the speed of a ball after it has fallen freely from rest through a distance of 12 meters
82. ### physics

a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight anlge? f ?
83. ### physics

If a spring has a constant of 20N/m how much potential energy does it store if it is compressed 2m in joules? <3
84. ### 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?
85. ### physics

4. What force is needed to push a 15 N object up a 20° incline at constant speed when the coefficient of friction is 0.30
86. ### physics

4. What force is needed to push a 15 N object up a 20° incline at constant speed when the coefficient of friction is 0.30?
87. ### Physics

Calculate the tangential speed of the earth around the sun (assuming a circular orbit).
88. ### Physics

A 1200 kg sports car accelerates from 0m/s to 27m/s in 10s. What is the average power of the engine?
89. ### Physics

a circuit contains a 9v battery and two 1 ohm bulbs. what is the voltage drop across each.
90. ### physics

What is the quantum particle of the electric field? Answer a. The proton. b. The electron. c. The photon. d. The neutron.
91. ### Physics

A 1300 sports car accelerates from rest to 90 in 6.5 . What is the average power delivered by the engine?
92. ### physics

does each of the two lenses used in a microscope produce a magnification of the object being viewed?
93. ### physics

calculate the impulse necessary to stop a 1500 kg car travelling at 90km/hour
94. ### Life...

Do i need to take precal and physics in highschool to become a nurse, dentist, or doctor?
95. ### physics

why does the filament of a bulb does not melt though it heats more than 3400 degree celcius
96. ### physics

--------------------------------------- A rugby player of mass 82kg is running at 6.0m/s. How much energy will be needed to stop him? ---------------------------------------
97. ### Physics

.17 kg hockey puck initial velocity 21 m/s stops 62m away. what is coefficient of friction?
98. ### physics

A rotating cylinder about 16 long and 6.2 in diameter what angular speed must it rotate?
99. ### physics

A hunk of cast concrete with a weight of 10 N will float if it displaces 10 N of water. True or False
100. ### PHYSICS

Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.