# Physics!

74,760 results, page 45
1. ## physics

The x-component of an electric field vector E = (200 N/C, 45 deg) is ___N/C.
2. ## Physics

What can we say about the force of an object when the mass increases and acceleration remains constant?
3. ## Physics

what are the factors that does not affect the time period of pendulum ?? Please help me in monday there is my exam please help me:-(
4. ## physics

a body moving at 40 m/s accelerates at the rate of 8m/s^2. what is the distance it transverses in 15 seconds?
5. ## Physics

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

what is the weight of a 100kg man on the moon with a gravitaional acceleration of 1.6m/s(squared)?
7. ## physics

if a swimmer swims 85.4 yards in five minutes, how many meters will he swim in 70.0 seconds?
8. ## Physics

I am not getting the difference between distance and displacement.... without using the words scalar and vector quantity, of course, i know what they mean but still i need help with this... so please help!!!
9. ## physics

Determine the velocity of a satellite orbiting Earth at a height of 3.2 x 10^3 meters.
10. ## Physics

An truck with a mass of 3500 kg travels with a velocity of 22.0 m/s. Find the momentum.
11. ## physics

Explain how the specific heats of materials are measured using the technique of calorimetry.
12. ## Physics

In the photoelectric effect, what determines the kinetic energy of the ejected electrons?
13. ## physics

How many grams of Al2O3 are formed from 15L of O2 at 97.5kPa and at 21degree celcius.
14. ## Physics

if im plotting a graph: Time Squared vs Length What will be the unit of my gradient ?
15. ## physics

velocit of gas molecule is 3m/s at 1000k. at what temperature velocity becomes 12m/s?
16. ## physics

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

How many 160ohms resistors must be connected in parallel to draw a current of 6.0A from a 120V
18. ## Physics

Wavw velocity is inversely proportional to what? (a) period (b) wavelength (c) amplitude (d) All of these
19. ## Physics

How much energy (in cal) is required to raise the temperature of 15.0g of isopropyl alcohol from 10.0 C to 25.0 C?
20. ## Physics

The pendulum is transported to another planet where the acceleration due to gravity is smaller.
21. ## physics

A 1000 kg sports car accelerates from 0 to 30 m/s in 10 s. What is the average power of the engine?
22. ## physics

Two vectors A and B are added. Show that the magnitude of the resultant cannot be greater than A+B or smaller than l A-B l.
23. ## Physics (Kinematics Check)

What is the average velocity of a dropped brick that falls 4.0 m? vi = 4.0 m/s vf = 0 m/s a = 9.81 m/s^2 t = vf-vi / a t = -4/9.81 t = 0.41 s v = d/t v = 4.0/0.41 v = 9.81 m/s^2 <----------
24. ## physics

Why is it vital that there is friction thatb opposes motion when two surfaces try to slide across one another?
25. ## Physics

Let U=(13i3−i). What is U†? Explicitly indicate multiplication with a * symbol. For instance, you should write 3*i+2 instead of 3i+2.
26. ## physics

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

Explain how the photoelectric effect is used to open automatic dooes when someone approaches.
28. ## Physics

Why does light striking a metal surface eject only electrons, not protons?
29. ## Physics

What are three different kinds of automatic switching devices? What are the conditions that cause the on/off action of the switch?
30. ## physics

What is the apparent weight of a lead brick 2.0 in x 2.0 in x 8.0 in if placed in oil with density p=0.93 g/cm^3 (Ppb=11.4 g/cm^3)(1 in. = 2.54 cm)
31. ## Physics

If 60 Cal. are added to 6 g. of iron at 20 degrees Celsius what is the final temp.
32. ## physics

A lizard accelerates from 2m/s to 10m/s in 4 seconds. What is the lizards average acceleration?
33. ## Physics

what is the northward and eastward components of a 550 kph velocity of an airplane going NE?
34. ## Physics

. How much potential energy does the 2.5 kg rock sitting on an 18 –meter high cliff have?
35. ## Physics

how much heat is needed to vaporize a 400.0 g of liquid water at 310.0 K?
36. ## physics

You have a mass of 60 kg and run up some stairs that are 5 m high in 6 seconds. How much power did you produce?
37. ## physics

what impulse is needed to slow a 45kg object from 15m/s to 12m/s?
38. ## physics

If your car accelerates from rest at a steady rate of 4 m/s2, how soon will it reach 81 km/h (50.3 mph or 22.5 m/s)?
39. ## College Physics

What is the momentum of an automobile (weight = 9700 N) when it is moving at 36 m/s to the south?
40. ## Physics

How many kcal of heat are required to vaporize 25.0kg of water at 100°C?
41. ## physics

If a hair dryer is rated at 900 W, how much energy does it require in 5 minutes?
42. ## physics

How much heat energy must be added to a 3.0 cm × 3.0 cm × 3.0 cm block of aluminum to raise its temperature from -50∘C to 50∘C?
43. ## physics

find time it takes for a sprinter to accelerate from rest to 10 m/s. If acceleration is 4.0 m/s sq.
44. ## physics

A golf cart has an acceleration of 0.4 m/s². What is its velocity after it has covered 10 m starting from the rest?
45. ## physics

A strong lightning bolt transfers about 26 C to Earth. How many electrons are transferred?
46. ## physics

How long does it take light to travel through a 2.7 mm-thick piece of window glass?
47. ## Physics

A 2200. Kg vehicle is traveling at 26 m/s what is the force needed to stop it in 21 seconds?
48. ## physics

a 8.0 kg object undergoes an acceleration of 2.2 m/s squared.what is the resulting force acting on it?
49. ## Physics

A 2000 kg truck is raised 15 m in an elevator. What is the increase in its potential energy?
50. ## Math/Physics

Why is I(x)=dP/dx*1/A x is the wavelenght lambda I is the intensity (I=P/A) P is the power A is the area Thanks in advance
51. ## physics

75 kg block is dropped from a height of 6 m. How much kinetic energy does it have when it has fallen halfway?
52. ## Physics

I've read all my resource materials and looked for outside resources already and i can't find an equation for this. I would appreciate any help
53. ## physics

A ball is thrown up with a speed of 30m/s, what is the maximum height reached?
54. ## Science (Physics)

(3.2534x10^4m)+(7.25x10^6m)/(4.26442x10^-3km)-(7.1299x10^-5km)
55. ## Physics

A ball rolls off the edge of a balcony at 8.0 m/s. Find its speed after 3.8 s in the air. Use g = 10. m/s2
56. ## physics

a spacecraft has an acceleration of magnitudes 5.0g what distance is needed for it to attach a velocity of 10 km/s?
57. ## physics

how do you find the magnitude of the net force if you have 2 forces acting on an object: 8.4 N[S] and 7.5 N[E]
58. ## physics

What acceleration is produced by a force of 250N acting on a mass of 25KG?
59. ## Physics

A car slows to a stop over a certain distance. What could cause the stopping force to be greater?
60. ## Physics

Describe an experiment to measure the specific heat capacity of a liquid.
61. ## physics

a year ago she measured 98cm from her tree . now it 1.1m tall how much has it grown
62. ## physics

A bus is traveling 30 m/s and travels 20m. How far does it travel froom each point?
63. ## Physics

An arrow is shot from a bow at 42 m/s at 70 degrees what is the horizontal and vertical components
64. ## Physics

What is the momentum of a 54 kg ball just before it hits the ground when it is dropped from a height of 1.4m? What formulas should I use?!
65. ## PHYSICS

A 69.0 firefighter climbs a flight of stairs 22.0 high. How much work is required?
66. ## physics

What is the effect of increasing the inclination of the track to the acceleration of the rider in the experiment?
67. ## physics

You have exactly 1 L of ethyl alcohol at room temperature 23 C. You put it in a refrigerator at 4 C.What's its new volume?
68. ## physics

What is the wavelength associated with a golf ball of mass 45 g driven off the tee with a velocity of 30 ms-1.
69. ## college physics

What is the speed of light moving through a medium of index of refraction 2.45?
70. ## Physics

The gravitational force between two electrons that are 0.98 m apart is 5.64 10-71 N. Find the mass of an electron. (Use G = 6.67 10-11 N·m2/kg2.) Do you use F=G(m1*m2)/r^2???
71. ## Physics

Two objects are moving in different direction. Under what circumstances can you treat this as one-dimensional problem?
72. ## Physics

Explain how you would determine how much error there is between a vector addition and the real results.
73. ## physics

A space vehicle accelerates uniformly from 50m/s at t=0 to 182m/s at t=1 0.0s. How far did it move between t=2.0s and t=6.0s?
74. ## physics

if I know that a astronaut weighs 860n on a unknown planet how do i determine the gravity?
75. ## Physics

How much power is required to move a 1500 kg elevator at a constant velocity of 2.5m/s.
76. ## physics

A rock is dropped from a 196-m-high cliff. How long does it take to fall (a) the first 98.0 m and (b) the second 98.0 m?
77. ## Physics

When an object is moving at a normal speed, is it's weight larger than when it's stationary?
78. ## physics

If body is rotating 30r.p.m in clockwise what is angular velocity and it direction
79. ## physics

The density of a gas is 1.25 kg m – 3 at N.T.P. Find the Root mean square velocity of its molecules.
80. ## physics

The gravitational force between two electrons that are 0.98 m apart is 5.64 10-71 N. Find the mass of an electron. (Use G = 6.67 10-11 N·m2/kg2.) Do you use F=G(m1*m2)/r^2???
81. ## Physics

Finding of radius of capillary tube without knowing surface tension
82. ## physics

What net force is needed to accelerate a 1.6 × 103kg automobile forward at 2.0 m/s2?
83. ## Physics

calculate K.E in Joules of a baseball w/ a mass of 237.2 cg moving at 85.00 mph
84. ## 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.
85. ## physics

The sensitivity of a galvanometer of resistance 990ohm is increased by 10 times.The shunt used is??
86. ## Physics

When a mass is hung from a spring stretches it by 15 cm. What is the period of the oscillations of this system?
87. ## physics

how can we calculate potential energy if we don't have mass but we have force or newtons?
88. ## physics

A 2.7 kg object falls from a tower. It experiences 2.3 N of air resistance. What is the acceleration?
89. ## physics

In LCR series AC circuit when does the effective voltage lag behind the current?
90. ## physics

what is the speed of a sound wave if its frequency s 160 hertz and its wavelength is 2.2m?
91. ## physics

two identical objects move with speeds of 5.0 m s and 25.0 m s. What is the ratio of their kinetic energies?
92. ## physics

what should the ratio of mass to volume be when considering the flight of a hot air balloon.
93. ## Physics

Find the length of a bridge if it is known that the steel in the roadbed expands by 0.52 m when the temperature changes from +2 to +30°C.
94. ## physics

what is the kinetic energy of a 200 g bullet travelling at a velocity of 400 m/s?
95. ## Physics

What is the order of drift velocity of electron during the flow of current through the metal?
96. ## physics

What equation gives the position as a function of time for an object with constant acceleration?
97. ## Physics

What equation gives the velocity as a function of time for an object with constant acceleration?
98. ## physics

HOw much heait is needed to raise the temperature of 5 kg of water 5 degrees celsius
99. ## physics

a ball is thrown up vertically and caught at 9.3 sec. what is the intial velocity
100. ## physics

Calculate the angular velocity of a swinging pendulum whose length is 125cm