# Physics!

74,457 results, page 42

1. ### Physics

. A weightlifter lifts a 76.0 kg barbell 2.60 m 20 times in 1.50 minutes. What is his power output (a) in watts and (b) in hp?
2. ### Physics

Show that the x-component of the tension force Fc in terms of its magnitude Fc is given by -0.3420 Fc
3. ### Physics

A body is thrown vertically upward with initial velocity 9.8m/s what height it will attain ?
4. ### physics

on a trip a car covers 42.3 miles in 40.0 minutes. find the average velocity in m/s and km/hr
5. ### physics

a pendelum in a fathers clock measures .90m from the support to the centerof the bob
6. ### physics

a body of mass 40kg walk to a step in 40. find the kinetic energy
7. ### physics (motion)

the initial velocity of a particle is u (at t=0) and acceleration f is given by at.which relation is valid: (a)v=u+at^2 (b)v=u +at^2/2 (c)v=u+at (d)v=u
8. ### physics

Which of the following sets of forces acting simultaneously on a particle keep it in equilibrium?
9. ### physics

what is the resultant of two 65N identical one acting easterly and the northerly
10. ### physics

A tank has a length of 0.18 m, a width of 0.78 m, and a height of 0.44 m. If it is filled with water, how many kilograms does it weigh?
11. ### physics

A tank has a length of 0.18 m, a width of 0.78 m, and a height of 0.44 m. If it is filled with water, how many kilograms does it weigh?
12. ### Physics 2

the microwave protion of the spectrum has wavelengths ranging from 1 mm to 1 m. find the corresponding frequency?
13. ### physics

Compare the work that a 22-kW car engine does in 60 seconds if its efficiency changes from 100% to 75%.
14. ### Science

What is the formula used for finding the gravitational pull of a particular mass in physics?
15. ### Physics

How is the Sky Screamer at Six Flags an example of Newton's First Law?
16. ### physics

A standard 1 kilogram weight is a cylinder 48.5 mm in height and 52.0 mm in diameter. What is the density of the material?
17. ### Physics

Find the attractive force bet a 50 kg girl and a 60 kg boy, if they stand 2.00 m apart.
18. ### Physics

A baseball goes from zero to 37 m/s in 0.177 m/s. What is its average acceleration? Answer in units of m/s^2.
19. ### Physics 11U

can a initial velocity from the average acceleration formula (Aav=Vf-Vf/t) be negative?
20. ### physics

When sand is poured on a rotating disc what happen to its angular velocity ? explain
21. ### physics

What is the pressure exerted on the ground by a cube which has a weight of 600N and a side of 1m2
22. ### Physics

A swordfish swims at 2.46km/h.How far has the fish traveled after 2050s?
23. ### physics

Calculate the distance Michael will travel if he maintain an average speed of 9.4 m/s for 2.2 seconds.
24. ### physics

Calculate the distance Michael will travel if he maintain an average speed of 9.4 m/s for 2.2 seconds
25. ### Physics

If a car increases its speed from 5 m/s to 25 m/s over 40 seconds. what is the acceleration? Give the unit.
26. ### physics

Find the final speed of the train assuming no friction. Answer in units of m/s
27. ### physics

A plane cruising at 247 m/s accelerates at 28 m/s 2 for 8.7 s.How far will it have traveled in that time?
28. ### physics

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

A 700 kg plane is traveling at 90 m/s at an altitude of 1500 m. What is the total mechanical energy?
30. ### physics

Which parameter of a projectile depends on the horizontal as well as the vertical component of velocity of projection?
31. ### Physics

gazelle traveling 200 m/s is launched at a 40 degree angle with respect to the horizontal.
32. ### Physics

1) Please describe the typical path(s) for hurricanes. Is this part of the pattern of convection?
33. ### physics

if a load 1kg streches a cordby 1.2cm.what is the force constantof the cord?
34. ### Physics

How fast is an object traveling after 3seconds if its terminal velocity is about 35 m/s.?
35. ### physics

Calculate the momentum of a 0.1 kg rifle bullet traveling 500 m/s. Answer in units of kg•m/s
36. ### Physics

What's the difference between Inertia and Impulse? Because the definitions sound really similar.
37. ### Physics

A projectile is shot straight up from the earth's surface at a speed of 1.20 x 104 km/hr. How high does it go?
38. ### Physics

How can you demonstrate that water is denser than ice without weighing them? What is the principle involved?
39. ### physics

Two point charges, each 6*10-5 C, are separated by 30 cm. What is the electrostatic force produced by this arrangement?
40. ### physics

How much work is required to accelerate a 0.145 kg baseball from rest, to a speed of 38.7 m/s?
41. ### physics

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

What is the distance from the earth's center to a point where your weight would be 1/25 of what you weigh at the surface?
43. ### Physics

How fast would a 4.8 kg object slide down a frictionless incline of 10.3 degrees?
44. ### Physics

A car slows down from a speed of 24.0m/s to rest in 9.0s, How far did it travel in that time?
45. ### physics

What percentage of the takeoff velocity did the plane gain when it reached the midpoint of the runway?
46. ### physics

state the precision of the measured quantities 1. 353g 2. 6.00cm please explain
47. ### 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?
48. ### physics

How much work must be done to stop a 1070 kg car traveling at 111 km/h?
49. ### Physics

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

A car speeds up from 12 m/s to 20 m/s in 6.4s.If its mass is 1200 kg,what force must its engine provide ?
51. ### physics

What happens if we use water instead of kerosene in joules calorimeter experiment
52. ### Chemistry and physics

What causes a red glow when the iron and sulphur mixture is heated?
53. ### physics

What is the force a rock exerts if it's mass is 36,000 kg and the acceleration due to Gravity is 9.8 m/s2
54. ### Physics

Which object had more potential energy when it was lifted to a distance of 10 meters?
55. ### physics

Find d electrostaticforce of a q1 to other charges.express ur answer as magnitude n direction
56. ### physics

a stone is thrown upward with a speed of 24.0m/s how fast is it moving when it reaches a height of 13.0m?
57. ### physics

A body accelerate from rest at (2m/s square) calculate its velocity after travelling 9m
58. ### physics

What is the force on the charge located at x = +8.00 cm in Figure 17.40(a) given that q = 5.00 n C and a = 7.00? (The positive direction is to the right.) N
59. ### physics

If a bicycle moves 20m what is the angular displacement in degrees, revolution and radians?
60. ### Physics

what is the mass of the toy truck if the force of friction holding it in place is 18.5N u= 0.2 at 30 degrees
61. ### Question

Are there any physics teachers on this site that can help? I've posted many questions on here but none of them get answered.
62. ### physics

an aluminium sphere of 20cm diameter is heated from 0¡ãc to100¡ãc. what is the change in its volume?
63. ### physics

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

What is the fundamental frequency on a 5 m rope that is tied at both ends if the speed of the waves is 24 m/s?
65. ### physics

A spaceship has a momentum of 20,000 kg·m/s to the left; its mass is 500 kg. What is the magnitude of its velocity?
66. ### physics

A man walks 5.0m due east and then 10.0m N30oE . Find his resultant displacement
67. ### Physics

90.0g of copper (c=390J/kg*oC) at 80.0°C are added to 270g of water at 20.0°C. What is the final temperature of the mixture?
68. ### physics

find the no. of electron which must be removed from a conductor so that it requires a charge of 3.2 microC
69. ### physics

A 3 kg book is lifted 5 meters above the floor for 250 seconds. What is the work done?
70. ### Physics

What is the significance in the observation of discrete spectral lines in the emission spectrum of hydrogen??
71. ### Physics

Would a feather have more air resistance than a lump of lead?
72. ### Physics

what is the northward and eastward components of a 550 kph velocity of an airplane going NE?
73. ### 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?
74. ### 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?
75. ### Physics

What distance does Anna covered by running on a circular track of length 500m?
76. ### Physics

The speed of a train increased from 20 mi/hr to 30 mi/hr in a distance of 500 ft. Calculate the average acceleration in ft/s2
77. ### Physics

A 2000 kg starts from rest and gains a velocity of 20 m/s in 5 s. What force wad applied on it?
78. ### physics

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

How long does it take the horse to cover the first 35.0 m of the race? acceleration is 3.00m/s^2
80. ### PHYSICS

two equal masses of 12kg each are 2m apart. WHat is the gravitational force between them?
81. ### physics

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

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

At what angle with the north would he have to walk? Answer in units of ◦ .
84. ### Physics

prove the following rules if true or false using Boolean algebra (a)A+AB = A+B (b)(A+B)(A+C) = A+BC
85. ### physics

a 2.00 * 10^5 kg lunar landing craft is about to touch down on the surface of the moon
86. ### physics

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

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

A ball is thrown vertically and reaches a height of 25m. What was it's initial velocity?
89. ### Physics

A stone weighs 34.0 N. What force must be applied to make it accelerate upward at 4.00 m/s2?
90. ### Physics

A stone weighs 34.0 N. What force must be applied to make it accelerate upward at 4.00 m/s2?
91. ### Physics

If a sprinter accelerates from rest at a constant rate of 2.0m/s/s how fast will they be running after 4.0s?
92. ### maths lit,physics,life science n tourism

i don't know which career to choose can you help me ?I'm doing grade 11.
93. ### physics

what is diffraction? When does it occur? Which waves will defract more when passing through an opening?
94. ### Physics 3

A golf ball is hit at 42.0 m/s at an angle of 20° with the ground. How far away does it land?
95. ### Physics

Calculate the momentum of a bullet moving with a velocity of 1000m/s ,if it has a mass of 0.01kg
96. ### physics

It takes 2.75s for the rock to hit the water at 54.45mph, how high is the bridge?
97. ### PHYSICS

WHAT IS THE VELOCITY OF A CAR THAT TRAVELS AROUND A TRACK THAT HAS A RADIUS OF 15M IN 2 MINUTES
98. ### Physics

a 100 N chandelier hangs from the ceiling on 8 chains. What is the tension force on each chain?
99. ### physics

a car is uniformly decelerated from 90km/hr in a time of 10 sec calculate the 2 acceleration
100. ### physics

a mass if 10kg move with a velocity of 4ms-1find it kinetic energy.