# physics( i have no idea how to go about gettign th

80,325 results, page 85
1. ## Physics

) What is the minimum uncertainty in the velocity of an electron that is known to be somewhere between 0.050 nm and 0.10 nm from a proton?
2. ## physics

a car is moving at 40km per hour what is the velocity in meters per second?
3. ## Physics

In the photoelectric effect, what determines the number of ejected electrons?
4. ## physics

Find the number of atoms in a gold ring of mass 6.43 g.
5. ## physics

Find the mass in grams of a carbon dioxide molecule.
6. ## AP physics

A car travels 35 km west and 75 km north. what distance did it travel?
7. ## Physics

How much energy is released when 250 kg of anthracite coal burns
8. ## physics

why is the color of the sky orange during sunrise and sunset? --pls help me on here-- thanks :)
9. ## physics

The distance between two planets is 1.6 x 10^6 m. How much time would the light signal take to go from one planet to the other?
10. ## physics

A fully loaded 737 aircraft takes off at 250 {\rm km/h}.
11. ## Physics

An electron and a proton are traveling at the same speed. Which one has the longer wavelength?
12. ## physics

how can you say that thickness of a material varies as it is a constant value. discuss with in 50 words.
13. ## physics

How much charge flows through a 12 V battery when a 2 ìC capacitor is connected across its terminal?
14. ## physics

show that none of the principal moments of inertia can exceed the sum of the other two Please help me thank you
15. ## physics

How long does it take a 25 kW steam engine to do 5.6 × 10^7J of work? Answer in units of s
16. ## physics

What is the rotational speed of the hour hand on a clock? -----rev/s
17. ## physics

A stone is dropped from a height of 4.5m.What will be the distance travelled by it during the last second of its fall?
18. ## physics

A nail is dropped from a height of 400m. How long does it take to land?
19. ## physics

state pascal's principle of transmission of pressure in liquids
20. ## physics

A car accelerates from rest at 7.9 m/s2. How much time does it need to attain a speed of 5 m/s?
21. ## physics

What is the rotational speed of the hour hand on a clock? -----rev/s
22. ## physics

A 5kg mass was lifted 365cm, how much work was done against gravity?
23. ## physics

explain why we sweat when it is hot? How does it help us? In terms of heat and temperature what happens
24. ## physics

You drive a car 7 h at 42 km/h, then 7 h at 65 km/h. what is your average velocity? answer in units of km/h
25. ## physics (Science)

If a bee flew 27 centimeters in 10 seconds what would its speed be?
26. ## physics

A mass accelerate uniformly when the resultant force acting on it is what?
27. ## Physics

2 factors that increase static friction? Could it be weight or the ground?
28. ## Physics

A car accelerates from rest to 90km/h in 10 seconds.What is its acceleration in m/s2?
29. ## physics

Find the resultant of two vectors 7N and 8N inclined at an angle of 65 degree to each other
30. ## PHYSICS

Determine the equivalent capacitance between A and B for the group of capacitors in the drawing. Let C1 = 12 µF and C2 = 4.0 µF.
31. ## physics

calculate the distance co verb for an object of mass20kg and force600n
32. ## physics

all electric charges are multiples of the charge on an electron, or atom?
33. ## physics

Two positive charges of 12 µC and 8 µC respectively are 10 cm apart. Find the work done in bringing them 4 cm closer, so that, they are 6 cm apart..
34. ## physics

Two charged spheres are 8.00 apart. They are moved, and the force on each of them is found to have been tripled
35. ## physics

what is the kinetic energy of a bear with a mass of 65 Kg and running at a speed of 20 m/s ?
36. ## physics

What force is required to accelerate a 90kg bike to 20 m/s in 15 sec? I need to know HOW to do it!
37. ## physics

With acceleration of 2500 m/s2, how long will it take to rreach speed of light
38. ## physics

A 84.0 kg person is being pulled away from a burning building as shown in the figure below.
39. ## physics

Essay on how accleration due to gravity is used to benefit mankind
40. ## physics

does the flame of gas stove emit light?explain
41. ## physics

What forces are acting on a puck that is on an air hockey table?
42. ## Physics

Calculate the de Broglie wavelength of a proton moving at 5.50x10^5 m/s.
43. ## physics

How much time is required for sound to travel 1.4 km through air if the temperature is 30.0 c
44. ## physics

With acceleration of 2500 m/s2, how long will it take to rreach speed of light
45. ## physics

What force is required to accelerate a 90kg bike to 20 m/s in 15 sec? I need to know HOW to do it!
46. ## physics

need help can someone please tell me Electricity is often converted into other forms of energy. List 3 examples.
47. ## physics

A force of 1.3N results in the movement of an object 3.1m northeast.How much work is done
48. ## Physics

What will be the final temperature if 1.9 x 10^2 kJ of heat is added to 0.5 kg of ice at 0 deg. C?
49. ## Physics

What are some common examples of light refraction, excluding rainbows?
50. ## Physics 102

What would be the path of the Moon if somehow all gravitational forces on it vanished to zero?
51. ## Physics

What is the frequency of an electromagnetic wave if it has a wavelength of 1.4 km? The speed of light is 3 × 10 8 m
52. ## physics

assign units and determine net forces in a situation.
53. ## physics

What is the kinetic energy of a 62kg cyclist if she is moving on her bicycle at 8.2 m/s?
54. ## physics

7/8 part of a substance decays in 45 days what is its half life
55. ## Physics

If the speed of the wave is 330 per sec calculate the wavelength
56. ## physics

Calculate the speed of a 10,000 kg airliner with a kinetic energy of 3.1 x 10^9 J.
57. ## physics

what 2 factors determine the size of the force of gravity? & what is the relationship between them?
58. ## Physics

If a force of 15kg. wt acts on a mass of 14 kg, what will be its velocity after 8 seconds?
59. ## Physics

What is the latent heat of fusion of ice to water? Help pls!!!!!
60. ## physics

What voltage is required to run a 45 W light bulb if the current is 0.5 A?
61. ## physics

claculate the force of gravity between two identical balls 8kg each, if they are 5m apart?
62. ## Physics

Explanation of twin paradox in regards to special relativity theory.
63. ## physics

the number of degrees of freedom for a rigid diatomic molecule is ------------
64. ## Physics

Two objects are moving about so that their total momentum is zero. What can be said about their kinetic energy?
65. ## Physics

How much energy is deposited in the body of a 78 kg adult exposed to a 2.9 Gy dose? Please and thank you.
66. ## Physics

briefly explain why can it be dangerous to touch a charged capacitor?
67. ## physics

What is the minimum speed required to simulate artificial gravity?
68. ## Physics

calculate the force between two identical charges of 1.0 x 10 exp -9 C separated by 1.0 Cm
69. ## Physics

How far apart are a proton and electron if they experience an electric force of 5.10N?
70. ## physics

Calculate the speed of a 10,000 kg airliner with a kinetic energy of 3.1 x 10^9 J.
71. ## physics

What is its velocity when it returns to the level from which it started? Answer in units of m/s
72. ## physics

why would you wear a white t shirt opposed to a blak one in winter
73. ## Physics HW Help, Please

What is the energy required to accelerate a 1600 kg car from rest to 33 m/s?
74. ## physics

what is the pressure on the bottom of an aquarium 0.3 m deep filled with water
75. ## physics

what is the frequency of a citizen's band (CB) radio which has a wavelength of 11.5 meters ?
76. ## physics

claculate the force of gravity between two identical balls 8kg each, if they are 5m apart?
77. ## physics

if 8.96dm of CO is produced at STP -how many moles of CaCO3 have reacted
78. ## physics

Determine the tangential speed of a point .4 m from the center of the wheel?
79. ## physics 12

a 1kg satellite has an orbital period of 4 hours. what's the altitude?
80. ## Intro Physics

An EM wave has a wavelength of 620 nm. What is its frequency? How would we classify it?
81. ## Physics

A mass accelerates uniformly when the resultant force acting on it is......?
82. ## Physics

the energy of a ball rolling up an inclined place plane is?
83. ## physics

What is the repulsive force between two pith balls that are 12.0 cm apart and have equal charges of -39.0 nC?
84. ## physics

At a distance of 2.0 m. from a +8.0 x 10^-6 C charge, the magnitude and direction of the electric field will be?
85. ## physics

why one cannot find the north pole of the earth using only a simple compass
86. ## physics

How much heat is added to 10.5 g of ice at -20.0°C to convert it to steam at 123.5°C?
87. ## physics

Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.
88. ## physics

describe how the values of resisitivity determine the uses of material in industry ???
89. ## Physics

What is the speed of a wave whose frequency is 9.00Hz and wavelength is 0.654m?
90. ## gr.10 physics

could someone please help me with this? Rearrange and simplify for r when A=3.14r^2 by the way, 3.14 is supposed to be pi, but i don't know how to write it...
91. ## physics

The magnitude of a vector is always : - a positive number - greater than 1 - an integer - none of the above.
92. ## physics

A 31-m/s velocity vector that makes an angle of 44° counterclockwise from the -x direction. x: y:
93. ## physics

How do you know what element is chemically active on the periodic table? PLS HELP
94. ## Physics

Calculate the resultant force of 5N and 5N ac ting at an angle 90 degree
95. ## physics - help !!!!!!!!

The magnitude of a vector is always : - a positive number - greater than 1 - an integer - none of the above. Thank you
96. ## physics

Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.
97. ## Physics

A car weighing 9800 N moves around a circular track of 70 m in 60 s. (a)
98. ## physics

A skier slides down a slope to the left at a constant speed.
99. ## Physics

how does the MA and the IMA of the inclined plane vary with the inclination angle?
100. ## Physics

17. Explain how water can transfer energy by conduction and by convection.