74,641 results, page 50

1. ### college physics

Find the height from which you would have to drop a ball so that it would have a speed of 8.4 m/s just before it hits the ground.
2. ### Physics

How would you change the following Galilean transformation equations in the case where a frame was moving both in the x and the y direction? (Use the following as necessary: x, y, z, Vx, Vy, t.) x' = y' = z' = t' =
3. ### PHYSICS

WHAT IS MAGNITUDE OF NORMAL FORCE IN FIGURE WITH V=+3M/S +10n INSIDE BOX IS 5KG
4. ### physics

An ambulance is going away from me @ 40mph with a siren @ 1000Hz.Will I heat a higher or lower frequency
5. ### Physics

What must be the orbital speed of a satellite in a circular orbit 740 km above the surface of the earth?
6. ### physics

What is the electric potential at the center of the square shown in the figure below? Assume that q1 = 1 x 10-8 C, q2 = -2 x 10-8 C, q3 = 3 x 10-8 C, q4 = 2 x 10-8 C and d = 1 meter.
7. ### physics

A football is kicked with an initial velocity v=9i+12j. Find the speed in (m/s) of the ball after 2.4s A) 9.2 B) 10.8 C) 12 D) 15
8. ### PHYSICS

A BALL MOVES ROUND A CIRCLE WITH RADIUS OF 20CM CALCULATE THE DISTANCE
9. ### physics

vander waal b for oxygen is 32 cm3/mol compute the diameter of o2 molecule.
10. ### Physics

A tennis ball is thrown up in the air. It stays there for 12.1 seconds how fast did you throw it?
11. ### physics

how much heat is needed to raise the temperature of 5kg of silver from 20 degrees C to 96 decgrees C?
12. ### physics

two charged objects carry a negative charge of 2*10c. calculate their distance apart
13. ### physics

How far will a car moving at 50 miles an hour travel in the time it takes to sneeze?
14. ### physics

a 150g-iron ball at 95 Celsius is dropped into a cavity in a block of ice
15. ### Mathematics-in-Physics

If two objects were traveling at the speed of light would they explode on impact or pass through each other?
16. ### Physics

Who was Isaac Newton? Write a brief paragraph about his life and work (include a bibliography)
17. ### Physics

KNOWNS: Diverging (convex) mirror Radius of curvature = 60 cm (f = 30 cm) M = 1/5 Hi = 20 cm UNKNOWNS: Ho? Di? Do? EQUATIONS: 1/Do + 1/Di = 1/f M = Hi/Ho = -Di/Do
18. ### physics

Consider the following specific case of the system described in the example above. Suppose the angle θ is 78.0° and the mass of the ball is 7.00 kg.
19. ### physics

what force is required to make an object of mass 500g accelerate at 4m/s2 (sqaured) ?
20. ### physics

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

At what distance would the repulsive force between two electrons have a magnitude of 8.50 N? I have no idea how to do this problem... can someone help me please... 3x10^-4/8.50?
22. ### physics

Things around you are emitting infrared radiation that includes the wavelength 1.44 10-5 m. What is the energy of the photons?
23. ### physics

a body is thrown downward with an initial speed of 20.0 m/s on earth. what is the acceleration of the object
24. ### Physics

What is the force necessary to accelerate an object with a mass of 115 kg and and an acceleration of 6 m/s2 (squared) east?
25. ### physics

The density of a solid ball with a mass of 231 g and a volume of 110 cm^3 is ____ g/cm^3.
26. ### 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?
27. ### physics

Calculate the effective value of g, the acceleration of gravity (in meters/second^2), at 8600 km above the earth's surface.
28. ### Physics

What are the horizontal and vertical components of a cat's displacement when it has climbed 5 m directly up a tree ?
29. ### physics

compare and contrast sound and electromagnetic waves in terms of types, speed, etc.
30. ### physics

compare and contrast sound and electromagnetic waves in terms of types, speed, etc.
31. ### physics

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

compare and contrast sound and electromagnetic waves in terms of types, speed, etc.
33. ### Physics

Will a cyclist coast farther if the lamp connected to his generator is turned off? Explain.
34. ### Physics

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

which object will have higher inertia a rock of 20kg or a hollow ball of 22kg
36. ### physics

If Michael Jordan has a vertical leap of 1.29 m, then what is his takeoff speed and his hang time?
37. ### physics

A stone is thrown up with a velocity of 39.2 at an angle of 30° above the horizontal find at what times, it will be at a height of 14.7
38. ### Physics

A block of mass 8.1 kg is pulled to the right by an applied force of 76.2 N. If the acceleration is 0.84 m/s^2, how much friction must be present?
39. ### Physics

The maximum kinetic energy of a mass-spring system in SHM is equal to
40. ### Physics

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

A ball strikes against the floor and returns with double velocity.In which type of collision is it possible?
42. ### Physics

An object initially at rest experiences an acceleration of 9.8 m/s^2. How much time will it take to achieve a velocity of 58 m/s?
43. ### 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

how do you rearrange this equation weight=T1sin57+[T1cos57/cos23.5]xsin23.5 when you're trying to isolate T1?????
45. ### physics

The equation y=5sin(3x-4)where y is in millimeters x is in metres and t is in seconds,represents a wave motion
46. ### physics

how to calcula distance of a object in free fall if only the time it reaches the ground is given
47. ### 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?
48. ### physics

in joule thomson effect,why the temperature of inversion leads to negative sign?
49. ### physics

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

Why electric dipole moment between two charges points from negative to positive charge.
51. ### physics

A person can jump to a height of 1.5m on surface of earth. Find the velocity with which he jumps.
52. ### Physics

how to find the average velocity and speed for an entire postion time graph
53. ### physics

newyorks 33-m tower oscilatesnin the wind with a period of 6.80s calculate the frequency
54. ### physics

Estimate the magnitude of the electric field in a cell membrane with a thickness of 8nm
55. ### physics

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

If a woman hasa mass of 50 kg calculate her weight in neutons
57. ### Physics

An engine works between the two temperatures 200 C and 120 C. Calculate its efficiency in percentage?
58. ### Physics

If a 65 kg sprinter can accelerate from a standing start to a speed of 12 m/s in 3 s, what average power is generated?
59. ### physics

Find the density of a substance whose mass is 28 grams and whose volume is 4 cubic centimeters
60. ### Physics

Throw a stone straight up in the air. At its highest height what is its speed? Is it accelerating then?
61. ### physics

What quantity of energy is represented by 250cm^3 of a gas 100N.m^2 when the temperature is kept constant
62. ### physics

if an object has a mass of 615grams and a volume of 150cm3 is the density 5.86g/cm3
63. ### Physics

a projectile is launched with an initial velocity of 60 m/s at an angle of 30 degrees above the horizontal. how far does it travel?
64. ### physics

What is the temperature of an ideal gas whose molecules have an average translational kinetic energy of 3.90 10-20 J? K
65. ### PHYSICS

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

calculate the impulse necessary to stop a 1500 kg car travelling at 90km/hour
67. ### 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?
68. ### physics

calculate the force of a 300,00 kg jumbo jet that is accelerating 0.4m/square just before takeoff
69. ### Physics

How much energy in kilocalories is expended against gravity alone by a 75- kg man climbing 1500 m up a mountain?
70. ### physics

A giant bull running at 15 m/s slows at a rate of 2.4 meters per second per second. How long does it take it to stop?
71. ### physics

An object is dropped onto the moon (gm = 5 ft/sec2). How long does it take to fall from an elevation of 250 ft.?
72. ### physics

determine the thrust produced if 1.5 x 10^3 kg of gas exits the combustion chamber each second, with a speed of 4.00 x 10^3 m/s
73. ### Physics

An object is shot upwards, from the ground, with an initial velocity of 120 m/s. How high will it be after 4.0s?
74. ### Physics

In what distance can a 25 gram bullet traveling at 250m/s be stopped by force of 5000N?
75. ### physics

Much much force is needed to push a container with wheels that weighs 250 pounds
76. ### PHYSICS RELLY QUICK QUESTION

is air resistnace negaitve because it opposes the motion?
77. ### PHYSICS-

Given a plastic rod and fur,explain how you would charge the electroscope positively and negatively.
78. ### Physics

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

From what height would a compact car have to be dropped to have the same kinetic energy that it has when being driven at 100 km/h?
80. ### physics

A fisherman's scale stretches 3.5 cm when a 2.1 kg fish hangs from it. What is the spring stiffness constant?
81. ### Physics

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

If you tried to smuggle gold bricks by filling your backpack, whose dimensions are 63 cm*29 cm*20cm, what would its mass be?
83. ### physics

would someone in a lift feel lighter or heavier as it accelerated upwards? explain your answer.
84. ### physics

How center mass affects an arrows distance traveled (include source)
85. ### Physics

Calculate the average speed (in km/h)of Larry, who runs to the store 3.6 kilometers away in 40 minutes.
86. ### physics

Determine the resulting temperature when 150g of ice at 0°C is mixed with 300g of water at 50°C
87. ### physics

Results for: In An Ideal Transformer, The Voltage And Current Are 220V,2A And Those In Secondry Are 2000V, IA. The Value Of I Is?
88. ### Physics

How much is needed to melt an ice cube, 3 centimeters on each side at 0 degree celcius?
89. ### Physics

Determine the acceleration of an electron placed in a constant downward electric field of 4.0X10^5N/C.
90. ### physics

The diameter of the earth is about 7.6 x 10^3 miles. What is the linear velocity of a person, on the equator, in feet per second?
91. ### physics 2

1)what potential differences must be applied across across a 1500 resistor in order that the resulting current be 50.mA?
92. ### physics

What is the total mechanical energy of a 20 kg owl flying at 5.0 m/s through the air at a height of 25 m above the ground?
93. ### physics

a truck moving at 100kph has a mass of 27000 kg. what force is necessary decelerate it at rate of -3 m/s²?
94. ### physics

Two 2.5 kg physical science textbooks on a bookshelf are 0.25 m apart. What is the magnitude of the gravitational attraction between the books?
95. ### physics

What percentage of the takeoff velocity did the plane gain when it reached the midpoint of the runway?
96. ### PHYSICS!!

free body diagram of a 4 kg bucket accelerating downward 2 meters per second squared
97. ### Physics

(a) Calculate the speed of a proton after it accelerates from rest through a potential difference of 285 V.
98. ### physics

the angle between two forces of 32 AND (neutrons) and 47 N is 36 degrees. Find the magnitude of the resultant force
99. ### physics

Calculate the coefficient of kinetic friction for tyre rubber on the road surface.
100. ### 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