# Physics!

74,547 results, page 96

1. ### Physics

A 2 kg object is moving 6 m/s. It compresses a spring 1 meter that has a spring constant of 8 N/m
2. ### physics

find the tension in each cable. T1=68.0 degree T2= 25.0 degree weight= 27500 N
3. ### Physics

Friction is usually the killer of efficiency. How does a ramp relate to friction?
4. ### Physics

The speed of light in polythene is 1.99 x 108 m/s What is the index of refraction of polythene
5. ### physics

Voltage=12V. R1=2.0ohms and R2=4.0ohms. Find the power used by R2.
6. ### Physics Speed of Sound

Does sound travel faster in wood or water?
7. ### Physics

Find the equivalent resistance in 16 ohms and 8.0 ohms connected in parallel.
8. ### Physics

Find the equivalent resistance in 16 ohm and 8.0 ohm connected in parallel.
9. ### physics

12.8 kg of ice at 0 C is dropped into 3.3 kg of water at C. What fraction of the ice melts? =
10. ### Chemistry/physics

The KE of a hydrogen atom's electron is 12.65 eV. Calculate the velocity of the electron? Known: KE=mv^2
11. ### physics 2

find the speed of proton 0.08m,mass of proton is 1.67x10^-27 kg
12. ### Physics 2

An AM radio station has a wavelength of 300 m. find this station’s frequency?
13. ### physics

a particle moves under the effect of force f2 from x=0 to x=4 of the work done by force
14. ### physics

if the diamter of a human hair is (50*10^-6 m) estimate the volume of hair on your head
15. ### physics

What is the acceleration of a car going from 3.0 x 101 km/hr to 1.20 x 102 km/hr in 3.0 x 101 sec?
16. ### physics

It takes 242 kJ of work to accelerate a car from 20.2 m/s to 28.2 m/s. What is the car's mass?
17. ### physics

Find the height of a cliff if the 87.6 kg cliff diver hits the water at 15.5 m/s.
18. ### Physics Science

How many grams of water at 20°C are necessary to change 800g of water at 90°C to 50°C?
19. ### Chemistry Physics

How many grams of water at 20°C are necessary to change 800g of water at 90°C to 50°C?
20. ### Physics

A glass block has a refractive index of 1.49. What is the critical angle for the block?
21. ### physics

Jake's momentum is 100kg*m/sec when he walks at 2 m/sec. What is his mass?
22. ### physics

What is the magnetic force by infinite wire on on a loop in magnetic field ?
23. ### physics

What is the gravitational acceleration on a planet where a 2.0 kg mass has a weight of 16 N on the planet`s surface?
24. ### Physics

1) If = 2.0 cm, due E and = 5.0 cm, due W Determine: a) R = -A + 2B b) V = - 2A - B c) F = 3A - B My Answers R= 8, V= -1, F= 1 Is this correct and how do you know when direction it's going to be?
25. ### Physics

You are given a vector in the xy plane that has a magnitude of 85.0 units and a y component of -40.0 units
26. ### Physics

What is the mass of a child if the force of gravity on the child's body is 100 N? A. 9.8 kg B. 4.45 kg C. 22.5 kg D. 10.2 kg what?
27. ### Physics

If the relative density of a metal is 19 what will be the mass of the metal when immersed in water.
28. ### physics

A spring 30mm by a force of 15N calculate the workdone by the force
29. ### Physics

A force of 64 N is applied on a body producing an acceleration of 2.4 m/s^2. What is the mass of a body?
30. ### physics

The ratio og intantanous charge and maximum charge on the plates of capacitor at T=RC is ??
31. ### physics

The ratio of instantanious charge and maximum charge on the plates of capacitor at T=RC is ??
32. ### physics

express the atmospheric pressure of 103360 pa in bar and milli bar
33. ### physics

An object is launched at a speed of 15 m/s. If it rises to a height of 2 m, at what angle was it launched?
34. ### Physics

Find the work necessary to run a football (1 lb) from the 2-m mark to the 52-m mark.
35. ### Physics

What is the energy stored in a spring with k= 280N/m that extends by 0.2m? k- Spring constant
36. ### Physics

What is the difference between Electro-Motive-Force and Potential-Difference?
37. ### physics

Calculate the gravitational force in N between a 17.3 kg object and 14.8 kg object that are separated by 1.02 m
38. ### Physics

A soccer ball is kicked with 26.5n and accelerates at 6.5 m/s 2 to the right. What is the mass of the ball?
39. ### PHYSICS

Is it a must that a nucleus must have opposite nature with the electron
40. ### physics

A ball is thrown straight up at 20.0 m/s. How fast is the ball moving after 2.00 s?
41. ### Physics

a spring extends by 10 cm when a mass of 100g is attached to it. what is the spring constant?
42. ### Physics

Sound from a 55dB horn is measured at a distance. What is the intensity of the sound in W/m2?
43. ### Physics

A man goes 123km North and then 123km to south.what is his displacement?
44. ### Physics

It takes 170 kJ of work to accelerate a car from 21.5 m/s to 27.0 m/s. What is the car's mass?
45. ### physics

A force makes an angle of 60° with y-axis.Find x-component of force.
46. ### physics

The period of an ocean wave is 20 seconds. Calculate the wave's frequency.
47. ### physics

what is the frequency of unknown fork if 8 beats in 8 seconds are heard with each fork
48. ### physics

An aircraft is flying at Mach 1.34 in air at -30C. What is the speed of the aircraft?
49. ### Physics

When a body vertically projected with 200m/s. then velocity of body at490m
50. ### Physics

If a spring has a stiffness of 950nm-1, what work will be done in extending the spring by 60mm?
51. ### physics

The length of a steel rod at 5°C is 12.500 m. What is its length when heated to 154°C?
52. ### Science-Physics

Why is it easier to float in the Dead sea than the Caribbean sea?
53. ### physics

dissplacement vector A is 4.5 km North, vector B is 3.0 km 50 degrees N of W. Find their resultant
54. ### Physics

What is the airspeed relative to the ground of an airplane with an airspeed of 120km/h when it is in a 90-km/h crosswind?
55. ### physics

Calculate the component of a force of 200N at a direction of 60degre to the force
56. ### Physics

Under what condition is average velocity equal to instantaneous velocity?
57. ### Physics

Find the resultant of 50 N acting east and 30 N acting 30 degrees northeast
58. ### Physics

If 0.01% of electrons are removed from 18 gm water, then calculate the charge produced in the water.
59. ### Physics

A solid weighs 6.4 kg in air and 5.6 in water. Find the density of the solid
60. ### Physics

A 50 N box is pushed 5 m up a 30 degree inclined plane. What work is done on the box?
61. ### Physics

It takes 226 kJ of work to accelerate a car from 23.3 m/s to 28.3 m/s. What is the car's mass?
62. ### physics

Show beta cubic=2alpha and galma cubic =3alpha
63. ### Physics

show that, the tangent of the angle of friction is equal to the coeficient of friction.
64. ### Physics

Circuit I-----R-------I I-I--I-----R----I---I-----I I I-------R------I I I I I--------/ I--------------I E=15v All R= 7ohom What is the equivalent resistant of the circuit?
65. ### Physics

If a sound has a wavelength of 3 m, what is its frequency? Use 340 m/s for its speed of sound.
66. ### physics

how will you find relative density of coconut oil with the help of density bottle
67. ### Physics

Hi! Could you help me with this question? imgur(dot)com/lJk2Mfa(dot)png
68. ### Physics

How many capacitor of 4uF capacity each are combined to get total capacity of 6uF
69. ### physics

How is light emitted from incandescent lamps? Fluorescent lamps? Candles?
70. ### Physics

A ball of mass 0.6 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker’s foot is 18 m/s at angle of 58◦ above the horizontal. The top of the fence is 10m high. The kicker’s ...
71. ### physics-sound

Explain why your voice seems to sound richer than usual when you sing in the shower?
72. ### Physics

How do I convert 289 kilograms/square meter into grams/square centimeter?
73. ### Physics

Convert 1,953 grams/cubic centimeters into kilograms/cubic meters.
74. ### Repost physics

PLEASE SOMEONE HELP ME!! I POSTED DOWN AT AROUND 10 something!! PLEASE!!! I NEED HELP!!!
75. ### physics repost

sorry! I never noticed..the mass should be 52000kg sorry about that!
76. ### physics problem

why are lightweight tires preferred over lightweight frams in bicycle racing?
77. ### physics

A particle moves with constant speed of 3m/sec along path y=3x^2 What is the acceleration of the particle at x=1.5m?
78. ### physics

If two particles have equal kinetic energies, are their momenta necessarily equal?
79. ### physics

A 50 kg skater pushed by a friend accelerates 5 m/sec. How much force did the friend apply?
80. ### physics

How does air within winter clothing keep you warm on cold winter days?
81. ### Physics

A student drops from a bridge to the water 9.0m below. With what speed does the rock strike the water?
82. ### physics

if a 60-kg woman is riding in a car traveling at 90 km/h is her linear momentum relitive to (a) the ground or (b)the car
83. ### physics

two springs have spring constants of 10.0 N/cm and 15.0 N/cm. which spring is more difficult to stretch?
84. ### physics

what is the final temperature when a 3.0 kg gold bar at 99 degrees is dropped into a .22 kg of water at 25 degrees
85. ### Physics

Can I use P1/P2=(T1/T2)y/y-1 to find the temperature when we pressure liquid refrigerant, for example liquid propane?
86. ### please

someone please help with the physics question i asked a little bit ago, i'm desperate
87. ### physics

if a neutral object lost 2 electrons, what would it's charge be? it would be positive right?
88. ### Physics

The applied force of a 2.0-kg object is 8.4 N [E] and the friction is 2.2 N [W]. What is the motion of the object? Can I use the formula Fnet = ma?
89. ### physics

if it costs 4.5 to 7.5 cents per kilowatt-hour (wind energy) what is the price per kW?
90. ### physics

Can a convex lens be used to magnify an image, "shrink" an image, or both? Explain.
91. ### Physics

X-rays are most similar to which of the following--alpha, beta, or gamma? I think gamma?
92. ### Physics

Do today's nuclear power plants use nuclear fission, fusion, or both?
93. ### physics

show that 1/sqrt(Msubscript 0 Esubscript 0)=C...I don't understand how to show this or what this question is asking..its for wave optics
94. ### physics

constant acceleration or constant velocity which is harder to maintain over a short distance
95. ### PHYSICS

gIVE AN EXAMPL OF WHEN AVERAGE SPEED WOULD BE USED INSTEAD OF INSTANTANEOUS SPEED.
96. ### Physics

If a 2.0-kilogram mass is raised 0.050 meter vertically, the work done on the mass is approximately (1) 0.10 J (2) 0.98 J (3) 9.8 J (4) 40. J
97. ### Physics

How do you find the max height of a projectile given the angle and Vi? Angle = 57.0 degrees Initial V = 46 m/s
98. ### Physics

What are the differences between a motor and a generator? I know they both use electromagnets, but how do they use them differently?
99. ### Physics

for gamma radiation 1rad=1rem, but for alpha radiation 1 rad=20rem. Why is there a difference?
100. ### physics

a book weighs 6 n. when held at rest above your head the net force on the book is?