74,641 results, page 58

1. ### PHYSICS

the following data were obtained for the position of a ball as it rolled along a straight track DISPLACEMENT (CM) TIME 2.90 0.60 7.40 2.10 11.00 3.30 22.70 7.20 31.10 10.00
2. ### physics

A 1100 kg sports car accelerates from 0m/s to 33m/s in 13s What is the average power of the engine?
3. ### physics

How can the equation be prove:maximum height,time of flight and maximun range in projectile?
4. ### physics

An elevator weighing 2400 N ascends at a constant speed of 5.0 m/s. How much power must the motor supply to do this?
5. ### physics

a racing car accelerates from rest to 30m/s in 6.0s what is her average acceleration? the answer in the book is 0.5m/s^2
6. ### Physics

You swing a 2.40kg stone in a circle, using the full length of a thin 60.0cm rope.
7. ### Calculus

no one on physics forums seems to know the answer so I was wondering if you guys could help post anser on these forms of course if you can help my question is here h t t p : / / w w w . p h y s i c s f o r u m s . c o m / s h o w t h r e a d . p h p ? t = 4 2 1 7 5 8
8. ### physics

Calculate the internal energy of 25.0 g of low-density oxygen gas (O2) at a temperature of 255 K.
9. ### physics

A yo-yo of radius 10 cm and mass 1 kg is dropped from rest. What is the instantaneous torque on the yo-yo if I hold the string with my fingers?
10. ### Physics

A child slides down a hill on a toboggan with an acceleration of 1.5 m/s squared. If she starts at rest, how far has she traveled in 1.0 s, 2.0 s, and 3.0 s?
11. ### Physics

Where does it takes less time to boils eggs: in a pan of boiling water or in a pressure cooker?
12. ### physics

An elevator is moving upward at 1.00 m/s when it experiences an acceleration 0.28 m/s2 downward, over a distance of 0.74 m. What will its final velocity be?
13. ### physics

An elevator is moving upward at 0.93 m/s when it experiences an acceleration 0.29 m/s2 downward, over a distance of 0.67 m. What will its final velocity be?
14. ### physics

How long will it take a 1630 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above?
15. ### physics

2. A hockey player is skating in a straight line at 1.5 m/s. He then increases his speed to 7 m/s in 3 s. What is his average acceleration during this 3 s?
16. ### physics

show that the acceleration is 7.5 m/s² for a ball that starts from rest and rolls down a ramp and gains a speed of 30 m/s in 4s
17. ### physics

A family drives 400 milles in 8 hours. Explain how the acceleration of their car changed?
18. ### Physics

Find the maximum height reached by a ball thrown upward at a velocity of 95ft/s
19. ### Physics

An automobile with an initial speed of 3.56 m/s accelerates uniformly at the rate of 2.7 m/s2. Find the displacement of the car after 4.1s.
20. ### physics

How much time does a passerby on the sidewalk below have to move out of the way before the flowerpot hits the ground? Answer in units of s.
21. ### Physics

What is the gravitational force between two identical 4,500 kg asteroids whose centers of mass are separated by 120 m?
22. ### physics

What is the force required to move a 22kg ccrate up an incline of 35 degrees, if the coefficient between the two surfaces is .30?
23. ### physics

what is the heat required to convert 0.1 kg of melting ice into steam at 100 degree celcius
24. ### Physics

A car travels in a straight line for 3.9 h at a constant speed of 83 km/h . What is its acceleration? Answer in units of m/s2
25. ### Physics

What exerts the force obn a rocket in outer space to make it move forward?
26. ### Physics

Why is it that interference effects don't show up regularly in glass window panes with two surfaces?
27. ### Physics

What is the potential energy, in joules, of a spring with a force constant of 6 N/m when it is stretched 20 cm from its unstretched length
28. ### physics

calculate the linear momentum of a truck with a mass of 13065kg that is traveling at 36m/s eastward.
29. ### Physics

If a tern travels 3.20 x 10^4 km south in 122 days, what is its average velocity in kilometers per day?
30. ### AP Physics

What is the minimum work needed to push a 1025 kg car 290 m up a 17.5° incline with zero friction?
31. ### physics

Where must an object be placed to have a magniﬁcation of 3.74 in front of a converging lens of focal length 14.1 cm?
32. ### Physics

A boy sledding down a hill accelerates at 1.25 m/s2. If he started from rest, in what distance would he reach a speed of 5.00 m/s?
33. ### physics

if two forces 10N and 20N are inclined at angle 60degree to each other. Find the resultant force.
34. ### Physics

An elevator is moving upward at 0.90 m/s when it experiences an acceleration 0.40 m/s2 downward, over a distance of 0.64 m. What will its final velocity be?
35. ### physics

What is the minimum work in joules needed to push a 1540 kg car 44.0 m up a 12.5 degree incline?
36. ### Physics

Where does it takes less time to boils eggs: in a pan of boiling water or in a pressure cooker?
37. ### Physics

A 1250 kg car travelling at 60.0 km/h comes to a sudden stop in 35 m. What is the coefficient of friction acting on the brakes?
38. ### physics

What, roughly, is the percent uncertainty in the volume of a spherical beach ball whose radius is r = 0.84 ± 0.04m ?
39. ### Physics

"At what point between two masses of 20kg and 15kg located 1.0m apart, will the gravitational field strength equal zero?"
40. ### physics

A 15 kg box slides across the floor with an initial velocity of +7.6 m/s. It comes to a stop after sliding +14.8 m. How much friction was present?
41. ### Physics

What is the frequency of an EM wave emitted most strongly by a glowing element on a stove with temperature 1500 K?
42. ### Physics

What is the difference between 110, 220 and 440 volts. How does amperage play a role with voltage
43. ### Physics

Why is an ice cube at 0°C more effective in cooling soft drink than the same mass of water at0°C?
44. ### Physics

Where does it takes less time to boil eggs: in a pan of boiling water or in a pressure cooker?
45. ### physics

Strictly speaking, you weigh a tiny bit less when you are in the lobby of a massive skyscraper than you do at home. Why is this so?
46. ### Physics

What is the longest wavelength of light that can be absorbed by a hydrogen atom that is initially in the second excited state?
47. ### physics

a 60kg sprinter accelerates from rest at 2.5m/s east for 4s. what force is acting and what is his final speed?
48. ### physics

a particle starts moving from rest with uniform acceleration . it travels a distance y in the next 2 sec

what is the index of refraction of a medium in which the speed of this radiation is 2.54X10^8 m/s? I don't even know where to start...
50. ### Physics

A boy sledding down a hill accelerates at 1.25 m/s2. If he started from rest, in what distance would he reach a speed of 5.00 m/s?
51. ### Physics

An elevator is moving upward at 0.90 m/s when it experiences an acceleration 0.40 m/s2 downward, over a distance of 0.64 m. What will its final velocity be?
52. ### Physics

An elevator is moving upward at 0.97 m/s when it experiences an acceleration 0.34 m/s 2 downward, over a distance of 0.80 m. What will its final velocity be?
53. ### physics

on a cool night with no wind people facing a campfire feel a breeze on their backs. why?
54. ### physics

How long will it take a 1920 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above?
55. ### Physics

a 475 kg pre-stressed concrete beam is to be raised 10.0 m in 24.0 s. how many kw of power is needed to for the job
56. ### PHYSICS HELP

what is the minimum amount of energy required to accelerate horizontally a 3.0g bullet from rest to a speed of 40.0 m/s?
57. ### physics

A family drives 400 milles in 8 hours. Explain how the acceleration of their car changed?
58. ### Physics

Is this true or false? All objects moving in a circle are accelerated. I really don't uderstand this question.
59. ### physics

A 4430-kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers?
60. ### maths lit,physics,life science n tourism

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

how long will it take a car to cover a distance of 500 meters if it accelerates from rest at a rate of 5.50 m/s2?
62. ### physics

In the Melde's string apparatus, why there is no standing wave in the segment between the pulley and mass hanger?
63. ### Physics

What push parallel to a 42 incline is required to just start a 340 N block sliding up the plane? us = 0.6
64. ### physics

An elevator is moving upward at 1.20 m/s when it experiences an acceleration 0.25 m/s2 downward, over a distance of 0.71 m. What will its final velocity be?
65. ### Another physics question...

Deduce the electric field strenght at a point midway between charges of 7.2*10^-6 C and -3.4*10^-6 C that are 2.0m apart from air. Thank you!
66. ### Physics

A boy sliding down a frictionless plane inclined at an angles 35° with the horizontal. What is the acceleration of the book?
67. ### Physics

Calculate the speed with which a swimmer enters water if she slides down a frictionless ramp that is 2.6 m high
68. ### physics/math

If you are driving 116 km/h along a straight road and you look to the side for 3.0 s, how far do you travel during this inattentive period?
69. ### physics

on a planet whose mass is twice that of earth and whose radius is same, with what acceleration will a body fall at sea level?
70. ### physics

a projectile is fired at an angle of 60 degrees with the horizontal and with the initital velocity of 80 m/s. What is the time of flight?

Forces of 4.57 N and 4.74 N act at right angles on a reddish-green block of mass 5.76 kg. How much acceleration occurs?
72. ### physics

What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 7.9 m/s when going down a slope for 7.4 s?
73. ### Physics

A boy sledding down a hill accelerates at 1.70 m/s2. If he started from rest, in what distance would he reach a speed of 7.40 m/s?
74. ### Physics

A boy sledding down a hill accelerates at 1.70 m/s2. If he started from rest, in what distance would he reach a speed of 7.40 m/s?
75. ### Physics (fix)

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

a ball of mass m is thrown vertically upwards with Vo= 10j m/s. Study nature of motion
77. ### physics

A neutron star has 10 km radius and rotation period 1.2 s What's the centripetal acceleration on its surface at the equator?
78. ### physics

A stone of mass m kg is held h metres above the floor 50s.The workdone in joules over this period is
79. ### college physics

an automobile traveling at 25.0 km/h along straight,level road accelerates to 65.0 km/h in 6.00s what is the acceleration
80. ### Physics

What is the tension in the string in (Figure 1) ? The volume of plastic ball is 95 cm3 and the density is 840 kg/m3.
81. ### physics

what force is acting on a circular platform rotating opposite of a person standing on the edge?
82. ### ap physics

How fast would a 1200 kg car travel if it had the same linear momentum as a 1500 kg truck traveling at 90 km/h?
83. ### Physical Science

What are the noninvasive benefits of the medical technologies that rely on physics of elementary particles?
84. ### PHYSICS

The force applied by the e-brake is F(eb) = m*a(eb) = -8.13*1452 = -12,100 N I didn't get the same answer - I got 11,804.76....please check
85. ### physics

Forces of 9.93 N and 1.23 N act at right angles on a reddish-green block of mass 3.02 kg. How much acceleration occurs?
86. ### physics

define black body, emissivity, solar constant in relation to heat transfer.
87. ### physics

is this right?if 5.0m/s^2=6.0m/s-0/1.2s a=fn/m 5.0m/s=15.0N/3kg show that the 5.0m/s^2 acceleration can result from a net force of 15N exerted on a 3.ok cart
88. ### physics

Correct the following statement: The racing car rounds the turn at a constant velocity of 145 km/hr.
89. ### Physics

Two electrons are fixed 2.99 cm apart. Another electron is shot from infinity and stops midway between the two. What is its initial speed?
90. ### Physics

What coefficient of friction is required to stop a hockey puck sliding at 12.8 m/s initially over a distance of 66.5 m?
91. ### Physics

A train whose speed is 100km/hr rounds a curve whose radius of curvature is 150m what is the acceleration?
92. ### physics

A ball of mass xg is release from a height of 20m . Calculate the time taken to fall to the ground.
93. ### physics

How much force is needed to accelerate a 125 kg block up a 35 degree include at 3.4 m/s2 if the coefficient of friction is 0.28?
94. ### physics

i want a simple laboratory method of determining a young modulus of a long thine wire
95. ### Physics

a rubber ball is thrown downwards off a balcony. after it travels 55m it has a speed of 46.5m/s. what is the initial velocity
96. ### physics

During a hard sneeze, your eyes might shut for 0.43 s. If you are driving a car at 125 km/h, how far does it move during that time?
97. ### physics

Figure 18-23 shows three linear temperature scales, with the freezing and boiling points of water indicated.
98. ### physics

A mango fruit drops from the top of it's tree which is 40 m. How long does it takes to reach the ground
99. ### College Physics

If the uncertanty in the slope is 1.214×10-14, is the measured value of ε0 within experimental uncertainty of the accepted value? (Yes or No)