74,851 results, page 54
1. Physics

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

how long does it take a car to change its velocity from 15m/s to 25m/s if it accelerates uniformly at 5m/s2.
3. Physics

If you wish to warm 100 kg of water by 20° C for your bath, show that 8370 kJ of heat is required.?
4. physics

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

calculate angular momentum and rotational kinetic energy of earth about its own axis
6. physics

i want to know the force of 3.0 kg weight dropped from 1.0 meter height for breakage testing purpose

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

coin and a piece of glass are both heated to 60 degrees celsius which will be warmer when you touch it ?
9. physics

What are the principles behind seatbelts and air bags that make passengers safer in a collision?
10. physics

a ball is thrown vertically upward at a speed of 45 m/s. how long does it take to return to the ground?
11. physics

Can you find the pressure exerted on the floor by the heel if it has an are of 1.50 cm^2 and the woman's mass is 55kg?
12. physics-lenses

trace and describe the image formed by a convex lens (object between 2f and f)
13. Physics

A person stands 2.0 m away from the reflecting surface of a plane mirror. What are the image characteristics?
14. 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 .
15. Physics

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

how high does a stone rise if it is initially thrown at a rate of 15m/sec
17. Physics

If a light bulb draws 60 watts and I leave it on for 5 hours, how much energy has been consumed?
18. Physics

When calculating delta Tsample,why is th initial temperature taken to be 100 degrees Celsius
19. Physics - projectile

a ball is thrown straight up at 50 m/s. What speed will it be when it returns to the thrower's hand?
20. Physics

2.An airplane flies north at a constant speed of 220 km/h. How far will the plane travel in 3.50 h?
21. physics

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

a beam of electron 13.0 ev is used to bombard gaseous hydrogen. what series of wavelengths will be emitted?
23. physics

What is the wavelength of the peak of the blackbody radiation curve for the human body (T = 310 K)?
24. physics

A ball is thrown vertically upward at 14.7 m/s. Show that its maximum height will be 11m.
25. physics

a 0.03 mol sample of helium is taken through a cycle. the temperature of state A is 400K. calculate V.
26. physics

Whn sand is poured on a rotatory disc what happens to its angular velocity. Explain
27. physics

how do we calculate the height of a falling ball with a mass of 0.5kg and a velocity of 10m/s.
28. physics

calculate the speed of an 7.3*10^4kg airliner with a kinetic energy of 1.4*10^9J. answer in units of m/s.
29. Physics

Things around you are emitting infrared radiation that includes the wavelength 1.13 10-5 m. What is the energy of the photons?
30. PHYSICS

a 1500kg sports car accelerates from 0 to 30 m/s in 8 seconds. Whaat is the power of its engine? Please help
31. 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?
32. Physics

A rubber ball of mass 0.12kg is held at a height of 2.5m above the ground, and then released.
33. physics

Yeah I know it is! But it's really confusing me and it's what my teacher wants. Say I was to pick a height of 25m and a Velocity of 20.0m/s, what would be my next step?
34. physics

what is the height of the ball if the bottom of the swing is zero, speed is 2.8m/sec, 9.81 acceleration of gravity
35. physics

Uranium 235 has 92 protons in its atoms. Calculate the number of neutrons in this atom
36. Physics

A 200N sign hangs and makes a 15.5 angle with the horizontal. What is the Tension in each rope?
37. physics

How much work isneeded to stop a 20g bullet moving with a speed of 150m/s
38. Physics

What observation shows that diamond has a slightly different index of refraction for each of the various colours of the spectrum?
39. physics

An electron with initial speed = 2.54×10^7 m/s is traveling parallel to an electric field of magnitude = 1.66×10^4 N/C .
40. physics

What is the charge of a bare Magnesium nucleus (no electrons, just the protons and neutrons) in Coulombs?
41. Physics 1

What torque is needed to accelerate a 70Kg disk with a 20 cm radius from rest to 10 rad/s?
42. Physics

Is there any point along the path of a projectile where its velocity and acceleration vectors are: a) perpendicular to each other? b) parallel to each other?
43. Physics

For the problem (8.99 X 10^9 NM^2/c^2)(1 X 10^-6c) / (.1m)^2 = .90 N When I put this in my calculator I did not get .90N. Am I suppose to convert the units to get the answer. Thank you for your help.
44. physics

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

Find the time constant (T) for the RC circuit with an open switch given t = 10 ms 50% of Qmax charge T = ? Q = CV (1-e -t/T)
46. 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?
47. 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.
48. Physics

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

How much work is required to lift a 280 kg refrigerator to the second-story level that is 6m high?
50. Physics

Determine the displacement of a plane that experiences uniform acceleration from 77 m/s to 110 m/s in 16 seconds.
51. science/physics

What acceleration will you give to a 25.8 kg box if you push it horizontally with a net force of 89.6 N?
52. physics

Explain the changes in frequency with respect to changes in mass, length tension on sonometer bridge.
53. 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?
54. physics

If you push a box for a distance of one meter with a force of 4,187 newtons How many calories have you used?
55. Physics

What would the percent error of the experimental value of g be if the accepted value is 9.8 m/s^2? The slope equation is y=.5001430132x-.0109639087
56. physics

If a car accelerates from rest at a constant 5.5m/s^2, how long will be required to reach 28m/s?
57. physics

an iron bar measures 11 cm x 7 cm x 5 cm it is melted down to make a cylinder height of 9 cm what is its radius
58. Physics

What is the kinetic energy of a 1100 kg sports car traveling down the road with a speed of 22 m/s?
59. Physics 11

A girl stands 2.5 m infront of a plane mirror. If she sees someone else 2.0 m behind her, how far is she from the image of that person?
60. Physics

A nurse counts 76 heartbeats in one minute. What are the period and frequency of the heart's oscillations?
61. physics

The mass of an iron cube having an edge length 1.8 cm is 70 g. Find itd density.
62. 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.
63. physics

Is there a way to calculate the moment of inertia of a hanging mass (3.1 kg) without length & width dimensions?
64. physics

Your friend says his remote control car travels at a velocity of 1.5 m/s. What is wrong with that statement
65. physics

What is the rotational speed of the minute hand on a clock? Convert from rad/s to rev/s
66. applied physics

if a DC motor uses a775 coulombs of charge in 15 seconds,how much current is produced
67. Active physics

How much hear must be added to 1.5kg of water at -25degC to raise it up to 119degC?
68. Physics

coin and a piece of glass are both heated to 60 degrees celsius which will be warmer when you touch it ?
69. physics

A force of 2 kg weight acts on a body of mass 4.9 kg .Find the acceleration produced.
70. physics

A 1.25-kg book in space has a weight of 8.35 N. What is the value of the gravitational field at that location? GIVEN: m = 1.25 kg W = 8.35 N Therefore, they want the acceleration. Would I use this equation g = Fg/m?
71. physics

A force of 2 kg weight acts on a body of mass 4.9 kg .Find the acceleration produced.
72. Physics

what is the average force needed to stop a car traveling 28m/s in 55m?
73. Physics

8. Fire engines used to be red. Yellow-green is now the preferred color. Why the change?
74. Physics

what is the average force needed to stop a car traveling 28m/s in 55m?
75. physics

What is the potential energy of a bear with the mass of 200 kg in 20 meter altitude of a mountain?
76. Physics

A 68.5kg man is standing still on an elevator that isn't moving, what is the normal force on him?
77. PHYSICS

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

If an object has a work of 300J and a displacement of 20m, how would I determine the net force?
79. Physics

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

In a string and pulley problem, will friction increase or decrease the tension.can you please explain if you can?
81. Physics

what is the distance that a satellite must be from Earths surface if it's period of rotation is 1 day? I really not sure where to even start..
82. PHYSICS

At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 0.40%?
83. physics

Find the mass of 0°C ice that 10g of 100 °C steam will completely melt
84. physics

c) A penny sits 12 cm from the center of a record turning at 33 1/3 rpm. What is the tangential speed in m/s?
85. Physics

What happens to your tongue when you lick an aluminum ice cream scrapper just after it has been used? Does it stick to the scraper? Why?
86. Physics

Make an analogy between heat capacity and density. Describe which quantities correspond to one another. Thanks!
87. Physics

As one exhales, what change in energy takes place between the diaphragm and the air in the lungs?
88. physics

a baseboard heater draws a current of 10.0A. How much charge passes through it in a time of 30 min?
89. Integrated Physics and Chemistry

The ____ motion of a star can be determined by studying its spectrum
90. Physics

A steel guitar string is 73 cm long and 0.15 mm in diameter. If it's under tension of 1.5kN, how much is it stretched?
91. Physics 1100

Find theta; and W in the figure below where w1 = 21.0 N, w2 = 34.0 N, and α = 64.0°, assuming that the arrangement is at rest.
92. physics

what has no beginning and no end. it is also considered as the medium for light in einstein's theory of relativity
93. physics

What are the factors that affect the quantity of heat needed to raise the temperature of a substance?
94. physics

Calculate the speed of a ball tied to a string of length 1.5 m making 4.6 revolutions every second.
95. 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)?
96. Physics

Find the mass of an object with the acceleration 15m/s^2 when an unbalanced force of 90.0N acts on it
97. Physics

Which color light is the result of a greater energy transition, red or blue?
98. Physics

An object accelerates uniformly from rest and covers 8m in 2 seconds. What is the distance covered in the third second?
99. physics

A 6.2kg piece of metal displaces 0.80 L of water when submerged.Find its density.
100. Physics

In ten to fifteen pages, write the applications and effects of solid expansion