# Math/Physics

214,834 results, page 71

1. ### physics

Two 2.5 kg physical science textbooks on a bookshelf are 0.25 m apart. What is the magnitude of the gravitational attraction between the books?
2. ### Physics

A loudspeaker emits energy equally in all directions at the rate of 1.75J/s. What is the intensity level at a distance of 15 m?
3. ### physics

compute the acceleration of a 1500-N block sliding down a 30 degrees incline. Assume friction is negligible
4. ### Physics

An FM radio station of frequency 107.7MHz puts out a signal of 50,000 W.How many photons/s are emitted?
5. ### Physics

An experimenter finds that no photo-electrons are emitted from tungsten unless the wavelength of light is less than 270nm.
6. ### Physics

An FM radio station of frequency 107.7MHz puts out a signal of 50,000W. How many photons/s are emitted?
7. ### Physics

An FM radio station of frequency 107.7MHz puts out a signal of 50,000W. How many photons/s are emitted?
8. ### Physics

A 20,000 kg vehicle is running at 80km/hr in a rotonda with a radius of curvature 25m compute for the centripetal force
9. ### Physics-Intro

Find the total force necessary to give a rocket of mass 25,000 slugs an acceleration of 28.0 ft/s2.
10. ### Physics

Forces of 9.5 N and 5.12 N act at right angles on a reddish-green block of mass 3.19 kg. How much acceleration occurs?
11. ### physics

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?
12. ### physics

A particle of mass 10 kg is slowly lifted up to a height of 10 metre then calculate the workdone by external and gravity force ?
13. ### physics

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?
14. ### physics

What force is necessary to keep a 2.00x10^3 car moving up a 15.0 degree incline at a constant velocity? (Mu=.200)
15. ### physics

find the change in momentum of a car weighing 1500kg when its speed increases from 36km/h to 72km/h uniformly
16. ### Physics

A wattmeter shows that a motor is drawing 2200w. What horsepower is being delivered? Is this correct? 2200/746 = 2.95
17. ### physics

Thirty microcoulombs of NEGATIVE charge experiences an electrostatic force of 27. mN. What is the magnitude and direction of the electric field?
18. ### physics

A person is kayaking in the ocean at 5.6 m/s 75° to the horizon when he experiences a current of 3.8 m/s 45° south of west. What is the speed and direction of his kayak?
19. ### physics

016 (part 1 of 2) 10.0 points A speedboat increases in speed from 17.9 m/s to 31.8 m/s in a distance 188 m. Find the magnitude of its acceleration.
20. ### physics

A car traveling at 6.5m/s accelerates 3.6m/s2 to reach a speed of 16.0 m/s. How long does it take for this acceleration to occur? Answer in units of s
21. ### physics

A 2.0kg book is lying on a 0.74m high table. You pick it up and place it on a bookshelf 2.0m above the floor
22. ### Physics

Repairing a spaceship CJ drops a hammer and it took .68 s to fall .90 m to the ground. What is the magnitude of the gravitational accerleration on mars
23. ### physics

A vector representing 170 N is oriented at 30 degrees with the horizontal. What is the magnitude of the vertical component? Answer in units of N,
24. ### Science Physics

How many Btu of heat must be added to 1200 lb of copper to raise its temperature from 100°F to 450°F
25. ### physics

car doing 60 mph and skids for 52.3 meters what is the speed at end of skid co/friction is 0.693 urgent help please
26. ### physics

a50g ball is hit to roll by a force of 100N.it rolls over 20m.what was its initial speed
27. ### Hurricane Project for Physics Class

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

A ball starts 1.175 meters off the ground and shot at an angle of 40 degrees with a velocity of 3.2 m/s. Where does it land?
29. ### physics

what is the t shirts vertical componet of its velocity at launch? if it launches straight at 45° above the horizontal plane at 141 /s?
30. ### Physics

A red flower seen in the light of mercury vapour lamp through a green filter will appear?
31. ### physics

with a cart of unknown mass, could you still determine whether its total energy is conserved? explain your reasoning
32. ### Physics

An aircraft landing on an aircrafts carrier is brought to a complete stop from an initial of 215km/h in 2.7 seconds. What is its acceleration in m/s2?
33. ### Physics

An aircraft landing on an aircrafts carrier is brought to a complete stop from an initial of 215km/h in 2.7 seconds. What is its acceleration in m/s2?
34. ### physics

A proton moves with a velocity V (2i - 4 j + k) m / s in a region where the field is given by B = (i + 2 j -3k) T . What is the magnitude of the magnetic force experienced by the load?
35. ### physics

How much power is developed by a jumbo jet that cruises at 250 m/s. When the trust of its engine is 100,000N?
36. ### physics

The mass of a pendulum moves a total horizontal distance of 14cm in one cycle. What is the amplitude of the vibration?
37. ### Physics

The brakes of a bike (with a person) having a mass of 63 kg, reduces it's velocity from 8.5 m/s to 0 m/s in 3.0 seconds. What is the magnitude of braking force?
38. ### AP physics

An object undergoes a displacement x while a force F acts on it. If F does zero work, then the angle between F and x must be
39. ### physics

Calculate the half-life of a radioactive substance that decays by a factor of 3 in concentration every 1 million years
40. ### Physics

Find the component form of ⃗v given a magni- tude of 9 and an angle of θ = 90◦ with positive
41. ### Physics

A block of mass 8.1 kg is pulled to the right by an applied force of 76.2 N. If the acceleration is 0.84 m/s^2, how much friction must be present?
42. ### physics

to view full image of an object 160 cm high, the minimum size of the plane mirror required is?
43. ### Physics

A person weighing 900 Newtons is standing on snowshoes. Each snowshoe has an area of 2500cm^2. What is the pressure on the snow?
44. ### Physics

An object is thrown with speed of 17 m/s at an angle of 550. find the time it takes to reach its maximum height.
45. ### physics

A ball rolls off a 1.40 m high table with an initial horizontal speed of 0.600 m/s. How far will it land?
46. ### PHYSICS

without air resistance maximum range of projectile is obtained with an angle of ???? Can you please fill in the blank THANK YOU
47. ### Physics

Find the potential energy of a system often point charges. 7nC and 2nC separated by 0.03m
48. ### physics

when two lenses of focal length +10cm and -5cm are placed in contact then find the net power ?
49. ### College Physics

A 750 kg rocket accelerates straight upward from the ground at 60 m/s2. What is the force (thrust) provided by the engine?
50. ### Physics

Michael Jordan’s vertical leap was measured to be 122 cm. What was his takeoff speed, and how long would he be in the air?
51. ### fristyear physics

two girls a and b weighting 40 and 30 kg both of them pull 14m held by them.they will meet when covers a distance of?
52. ### physics

a small marble of negligible dimensions and of the mass 1.1kg is placed at a point A of a smooth frictionless circular
53. ### Physics

A baseball is thrown horizontally from a height of 3.6 meters at a speed of 24 m/sec. How far will it travel along the ground?
54. ### physics

A steel ball with a mass of 0.65 kg is swinging in a circle with a radius of 1.3 meters at a speed of 17m/s. What is the centripetal force?
55. ### physics

A motorcycle of mass 350kg has an acceleration of 3m/s when the resistance against motion is 200N.Calculate the force required
56. ### physics

A 4.40kg bucket of water is accelerated upward by a cord of negligible mass whose breaking strength is 74.0N
57. ### Physics

A motor cyclist travelling at 12m/s decelerate at 3m/s(squared)? How far does he travel while coming to rest?
58. ### physics

Why is parallax method not useful for measuring the distances of stars more than 100 light years away?
59. ### physics

A 102-kg man stands in an elevator that has an upward acceleration of 4.1 m/s2. The magnitude of the force exerted by him on the floor is about (g = 10 m/s2):
60. ### Physics

a boy whose weight is 600 N runs up a flight of stairs 10 m high in 12 second .What is his average power?
61. ### physics

A rocket is fired with an initial velocity of 200m/s at an angle of 60' to the horizontal.Find (1)the maximum height reached.
62. ### physics

In a tug of war match, each side pulls with a force of 500N, but the rope does not move. How much work is done?
63. ### Physics

Two point charges of magnitude 2.0 X 10^-7 C and 85 X 10^-8 C are placed 12 cm apart .What is the field intensity of each charge at the site of other ?
64. ### Physics

A tyre is suddenly brust when it was pumped to a presure of 4 atm at 20 degree celsius. Calculate the final temperature.
65. ### physics

Compute the electric field about a uniformly charged plane sheet using gauss law.
66. ### physics

Consider the static equilibrium diagram below. What is the net force acting along the positive x-axis?
67. ### Physics

A bolt requires tightening to a torque of 98 N-m. If a wrench is 28 cm long, what perpendicular force should be applied at its end?
68. ### Physics

a 50 g marble is released from a height 1 m above the floor. Calculate its momentum just before hitting the ground
69. ### physics

What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 10.5 m/s when going down a slope for 3.18 s?
70. ### Physics

are water waves at the beach with a velocity of 1.75m/s and a wavelength of 3.213 and frequency of 1/1.84Hz considered fast?
71. ### physics

two trains are moving towards each other with velocitied u1 and u2 see that the distance between them is x.the condition for them to not collide is
72. ### 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?!
73. ### TVTC

Physics...a diver of mass m drops from a board of 10m above water surface. find his speed at 5m
74. ### physics

A bullet in a gun is accelerated from the firing chamber to the end of the barrel at an average rate of 6.20*10^5 M/s^2 for 8.10*10^-4 s what is its muzzle velocity
75. ### Physics

Inside a metal conductor, why is it not possible to have a static charge configuration if there is a net electric field?
76. ### Physics

How high will you be when you stop rising if you jump upward with an initial vertical speed of 2 m/s? Answer to the nearest 0.1 m, and use g = 9.80 m/s2.
77. ### physics

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

A red colored ball tossed upward reaches a maximum height of 3.0m. show that the initial speed is 7.7m/s^2.
79. ### *physics*

what is the smallest time in which a 9.00kW motor can lift a 3500 kg elevator to a height of 9.50m? use 10m/s^2 as g.
80. ### Physics

Determine the stopping distances for a car with an initial speed of 93 km/h & human reaction time of 0.80 s, for an acceleration a=−4.0m/s2.?
81. ### Physics

What is the power of an engine that pulls a 1000kg automobile at a steady speed of 10m/s along a level road?
82. ### physics

suppose that the two person,each of mass 100kg are 3meter a part in outer space.what is the magnitude of the gravitational
83. ### physics

A duck waddles 2.3m east and 7.0m north. what are the magnitude and direction of the ducks displacement with respect to its original position?
84. ### physics

how do you plot T2 2.14, 2.10, 2.08, 2.03, 2,20 and 2.30 and length .445, .54m, .497m, .50m, .53m and .555m on a graph and how do you find the gradient
85. ### physics

Calculate the speed of a satellite moving in a stable circular orbit about the Earth at a height of 4800 km.
86. ### Physics

A car going 50 m/s undergoes an acceleration of 2 m/s^2 for 6 seconds what is the final velocity ? How far did it travel while it was accelerating?
87. ### lighthouse christian college

Wich career can I take when I took english,afrikaans,lo,physics and pure maths?
88. ### Physics

The truck of a passenger car applies brakes at a velocity of 30 m/s and comes to rest 5 seconds later. What is the deceleration?
89. ### AP Physics

How fast (in rpm) must a centrifuge rotate if a particle 6.0 cm from the axis of rotation is to experience an acceleration of 130000 g's
90. ### physics

If you push a box for a distance of one meter with a force of 4,187 newtons How many calories have you used?
91. ### Physics (Heat)

Sitting under the fan on a hot day makes us feel cool.why? Give reason
92. ### physics

three forces of 10N,30N and 50N act at a point at 120° to each other.Find their resultant.
93. ### Physics

What mass must be added to 0.9kg trolly to give it an,acceleration of0.4m² when a 0.6n force is applied to it?
94. ### Physics

How many electrons pass a given point in the circuit in 17 minutes? The fundamental charge is 1.602•10^-19. And the current is 0.526315789
95. ### Physics

How many electrons pass a given point in the circuit in 17 minutes? The fundamental charge is 1.602•10^-19. And the current is 0.526315789
96. ### pure maths, agriculture,life sciences, physics

i want to know what does those subject i choose fall under which career
97. ### physics

calculate the energy evolved when 8 droplets of water of radius 1/2mm each combine into one. where s=0.072N/m.
98. ### physics

calculate the energy evolved when 8 droplets of water of radius 1/2mm each combine into one. where S=0.072N/m
99. ### Physics

Calculate the energy evolved when 8 droplets of water of radius 1/2mm each combine into one where s=0.072N/m.
100. ### physics

a cyclist does work at the rate of 500w while riding. how much force does her foot push with, when she is traveling at 8.0 m/s?