# Physics!

74,730 results, page 41
1. ## physics

a sprinter runs 222yds in 25.2s find her average speed in yds/s
2. ## physics

'perpetual motion' is ruled out of the realm of possibility because of which law of thermodynamics?
3. ## physics

how do you compare mass and weight on the earth, moon, and outer space?
4. ## Physics

4. Find the magnitude of the force between two charges Q1 = 3µC, Q2 = 2.5µC that are 50mm apart.
5. ## physics

If a nuclide has a decay constant of 10^-6 s-1 what is its half life ??? I think it is 0.693 / 10^-6 = 693000 or 6.93 x 10^5 Is this right ...
6. ## Science

Name 3 physical (physics) occurances that happen within a roller coaster ride?

How many current paths are there in a series circuit connection?
8. ## physics

What is the momentum of a proton travelling at v = 0.95c in the x-direction in the reference frame?
9. ## Physics

In the photoelectric effect, what happens to the stopping voltage when the light frequency is decreased?
10. ## physics

at what temprature is the average translational k.e of a molecule in an ideal gas equal to 1 ev?
11. ## Physics

How long is Mayra, a ballerina, in the air when she leaps straight up with a speed of 1.23 m/s?
12. ## Physics

How long is Mayra, a ballerina, in the air when she leaps striaght up with a speed of 1.23 m/s?
13. ## physics

if the piston is in thermal equilibrium but the it is pushed inward, can there be a change in temperature(increase) even if Q=o
14. ## Physics

A charge q1=7.8x10^-6 C is placed at the origin. q2=-3.4x10^-6 C is placed at y=-1 m, x=2 m. q3=-9.2x10^-6 C is placed at y=4 m. What is the total force on q1? On q3?
15. ## Physics

A dancer completes 3.4 revolutions in a pirouette. What is her angular displacement? Help me get this answer please.
16. ## Physics

A bicycle wheel of radius 0.2 m is spinning at a rate of 70 revolutions per minute.
17. ## physics

The speed of a car moving in a straight line increases every second. It goes from 30 km/hr (about 19 mi/hr) to 35 km/hr (about 22 mi/hr) in the first second. The next second, it goes from 35 km/hr to 40 km/hr (about 24.8 mi/hr). What is its acceleration?
18. ## physics

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

I need help really bad anyone good at this???? Name three different kinds of graphs that are often used to plot information and discuss the value of each.
20. ## Physics

A dancer completes 3.4 revolutions in a pirouette. What is her angular displacement? In rad.
21. ## physics

A 0.255kg rock is thrown with a speed of 12.0m/s.How much energy does it initally passess?
22. ## physics

A car accelerates from rest at 2.57 m/s2. What is the velocity at the end of 5.4 s? Answer in units of m/s
23. ## PHYSICS

EXPLAIN FRICTION AT RIGID SUPPORT OF A PENDULUM SUSPENDED USING A STRING.
24. ## Physics

A 68-g ice cube at 0°C is placed in 796 g of water at 30°C. What is the final temperature of the mixture?
25. ## Physics

A dancer completes 3.8 revolutions in a pirouette. What is her angular displacement? In Rad.
26. ## Physics

can anyone give a site that have problems about pressure with solution.. urgently needed.. thanks :)
27. ## physics

determine the pressure of a 20 lb force is applied to an area of 10 inch squared
28. ## physics

what law is it when gravity pushes down on a rocket that is accelerating at a rate of 270 km/h
29. ## PHYSICS

What is the force of attraction between two masses 5kg and 8kg at a distance of 60cm apart.
30. ## physics

A proton is confined to a nucleus of radius 5 FM.what's the minimum uncertainty in momentum?
31. ## physics

a 50 kg person has a weight of 80 N on the surface of the moon what is the acceleration due to gravity
32. ## Physics

What angle should you rotate a mirror so that a reflected ray rotates through 28 degrees. I got 20, but i am not sure, please help
33. ## 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)
34. ## physics 101

explain rocket propulsion in terms of conservation of momentum
35. ## physics

draw the following position vectors, find the displacement and present it on diagram. di=2 m df=5m di=3m df= -4m
36. ## Physics

a football is kicked in 36 meter per second and 30 degree angle with land.After 1 second,how much it's velocity will ?
37. ## physics

what is the pressure exerted on the ground by a cube which has a weight of 600n and a side of 1m

the potential difference across a load is 9V. explain what this means in more fundamental terms.
39. ## physics

How does pressure work as a restoring force to create a sound wave?
40. ## Science(physics)

A stone falls from rest for 8.0 second. a.)Calculate the stones velocity after 8.o second
41. ## physics

a car moving through road what is the direction of force and surface of acting
42. ## physics

What is the electric field intensity of a point 15cm from a charge 15microcoulomb
43. ## physics

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

What must be the magnitude of the force of static friction between the surface and the bottom of the crate?
45. ## physics

How much time will elapse between seeing lightening and hearing the thunder happening 8000 m from you?
46. ## Physics

If you must stop your moving car in a hurry, should you slam on the brakes and lock them?
47. ## physics

A 9.1-µF and a 6.8-µF capacitor are each charged to 2.5 multiplied by 10-4 C. Which has the larger electric potential difference?

49. ## physics

What is the wavelength of the higher frequency limit (18 megahertz) in dry air at 0 C?
50. ## physics

why is it harder to maintain costant accleration rather than cosntant velocity when walking
51. ## physics

A tire rotates 140 rpm, how many rotations have been completed in 20 seconds?
52. ## physics

a bag weighing 9.4kg is dropped 1m onto concrete, what is the impact force in kg
53. ## physics

How much time will elapse between seeing lightening and hearing the thunder happening 8000 m from you?
54. ## physics

What factors directly affect how much air drag an object experiences?
55. ## Physics

How fast would you need to be travelling relative to an observer in order for them to see a 15% increase in your mass?
56. ## physics

A projectile is shot straight up from the earth's surface at a speed of 1.50×104 .
57. ## 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?
58. ## physics

how do you find the verticle component of velocity of a projectile just as it strikes the ground?
59. ## Physics

What would the experimental value of g be if the slope of the graph represents 1/2 g and the equation is y=5.00x-.0109639087
60. ## 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?
61. ## physics

A dart is thrown horizontally toward X at 30 m/s as shown. It hits Y 0.29 s later. The distance XY in centimeters is:
62. ## physics

If 1g of steam is mixed wid 1g of ice, then what will be the resultant temperature of the mixture?
63. ## physics

Explain how the specific heats of materials are measured using the technique of calorimetry.
64. ## physics

a 15 kg bucket is raised to paint a ladder with an acceleration of 3 m/s.^2 what is the tension in the rope?
65. ## Physics

A body of mass m moves under the influence of force F(r). Given it's trayectory r(t), find F(r).
66. ## Physics

A body of mass m moves under the influence of force F(r). Given it's trayectory r(t), find F(r).
67. ## physics

Explain how the pitch of the roaring sound relates to the length of the tube.
68. ## Physics

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

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

You are driving a car with a power output of 56,000 Watts. How many seconds will it take to go from 0 m/s to 27 m/s?
71. ## physics

A hunk of cast concrete with a weight of 10 N will float if it displaces 10 N of water.
72. ## physics

an automobile travels at a uniform speed of 88 kph. how many metres does it travel in 1 second?
73. ## Physics

If two resistors are connected in parallel, I know that they share the same voltage but how would you determine their current?
74. ## Physics

What electric field strength would store 17.5J of energy in every 9.00mm3 of space?
75. ## Physics

If a car delivers 76.2 hp of power, how much time will it take for the engine to do 5.78e5 J of work?
76. ## Physics

How many meters does a bug fly in 1120 seconds if it travels at 1 cm/sec.?
77. ## Physics

if the frequency of a particular electromagnetic wave is 4 x 10^14 hertz, what is its wavelength of the radiation in nanometers (nm)?
78. ## Physics

A potter's wheel rotates with an angular frequency of 1.54 rad/s. What is its period?
79. ## Physics

How do I find the recoil velocity of the earth immediately after the popper popped?
80. ## Physics

What is the resistance of a 4.00 m length of copper wire having a diameter of 2.00 mm at a temperature of 20 degrees?
81. ## Physics

What’s the specific heat of a material if it takes 6.5 kJ to increase the temperature of a 1.8 kg sample by 6.4 ∘C ?
82. ## physics

When an object travelling at 12.7 m/s [E] speeds up to a velocity of 21.5 m/s [E] in 3.45 s, the magnitude of the acceleration is __________m/s2.
83. ## Physics

What is a node? i'm supposed to label the nodes in a diagram of a wave but i can't find it anywhere
84. ## physics

The time required for a car to reach 28.5 m/s from rest, accelerating at 3.70 m/s2 is __________ .
85. ## physics

A carton of juice remains intact even after you have sucked out all the drink from it. please explain
86. ## physics

Can a metal sphere of radius 1cm hold a charge of 1coloumb
87. ## Physics

A jeep has a speed of 50 m/s at a given instant and 10 m/s later. fin its retardation, assuming it to be constant.
88. ## Physics

What is the wavelength of radio waves of frequency 1400 kHz? (a) 42.9 (b) 214 (c) 42.9 (d) 3*10^8
89. ## physics

The acceleration of a certain rocket is given by a=bt where b is positive cnstant, find the position function Xo and Vo at t=o?
90. ## physics

what are the methods of computing the veolicty of a particle in one- dimensona motion from a graph ?
91. ## physics

can anyone give me a site that "best explains" about Rotational motion/Angular. thanks a lot.. :)
92. ## physics

An object is thrown vertically upward with a speed of 19.1 m/s. How high does it rise?
93. ## Physics

A body of mass m moves under the influence of force F(r). Given it's trayectory r(t), find F(r).
94. ## physics

how the frequency of sound produced will change in an aluminium string of 15 cm length
95. ## physics

a suitcase weighs 30 kg wt.everytime i weigh it on a spring balance,the reading is different.WHY?
96. ## physics ! HELP PLEASE !!!!1

what are the methods of computing the veolicty of a particle in one- dimensona motion from a graph ?