# physics please HELP !

74,755 results, page 51
1. ## physics

a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight anlge? f ?
2. ## PHYSICS-

Given a plastic rod and fur,explain how you would charge the electroscope positively and negatively.
3. ## physics 101

A 72.9 kg man is standing on a frictionless ice surface when he throws a 1.6 kg book at 11 m/s.
4. ## Physics

Two charges +1C and -1C are placed at distance 1m apart ,each having masses 2kg respectively are released.what is the type of collision they experience?
5. ## physics

two charged objects carry a negative charge of 2*10c. calculate their distance apart
6. ## 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?
7. ## physics

If a man weighs 820N on d earth what would be on Jupiter, where the acceleration due to gravity is 25.9m/s
8. ## PHYSICS

What is the potential energy of a 150 kg diver standing on a diving board that is 10 m high?
9. ## physics

what pressure would you expect if the gas in the flask were heated to 150 degrees celsius?
10. ## Physics

What acceleration will you give to a 24.9 kg box if you push it horizontally with a net force of 82.8 N? __________ m/s2
11. ## Physics

So if mgh=1/2mv^2 and I'm solving for v is my answer going to be v= squareroot of 2* (gravity) 9.8m/s^2* (height) 3.67m?
12. ## Physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
13. ## Physics (HELP)

A real image is usually inverted, but can be upright in special cases. True or false?
14. ## physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
15. ## math

In physics class, the girl to boy ratio is 3 to 4. If there are a total of 14 students, how many girls are there?
16. ## Physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
17. ## Physics (HELP)

An object inside of the focal point of a concave mirror produces an image that is...
18. ## Physics

Leroy, who has a mass of 72 kg, is skateboarding at 5.9 m/s when he smacks into a brick wall and comes to a dead stop in 0.2 s.
19. ## physics

If the resultant velocity is 29.7 m/s and is directed at an angle of 22 degrees, what are the horizontal and vertical components?
20. ## Physics

Contrast the metric units of distance, time, and speed. Describe the relationship between them.
21. ## Physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
22. ## Physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.
23. ## physics

A stone is thrown vertically upward with a speed of 14.0 m/s from the edge of a cliff 89.0 m high
24. ## Physics

The index of refraction of water is 1.33. What would be the speed of a light wave passing through at this medium? 4 x 10^8 m/s 2.3 x 10^8 m/s 4.4 x 10^-9 m/s 2.6 x 10-^9 m/s
25. ## Physics

The index of refraction of water is 1.33. What would be the speed of a light wave passing through at this medium? 4 x 10^8 m/s 2.3 x 10^8 m/s 4.4 x 10^-9 m/s 2.6 x 10-^9 m/s
26. ## Physics

What is the capacitance of a capacitor that stores 5.2 μC of charge on its plates when a voltage of 4.8 V is applied between them?
27. ## Physics

I want to become an astonomer or study astrophysics but I didnt do maths a level can I still do it? Is there any way you can help me or provide aN alternative
28. ## math

In physics class, the girl to boy ratio is 3 to 4. If there are a total of 14 students, how many girls are there?
29. ## Physics

What is the wavelength of visible light of 6 x 1014 Hz frequency? 500 nm 400 nm 4000 nm 4 nm
30. ## Physics (HELP)

The index of refraction of diamond is 2.42. What would be the speed of a light wave passing through a this medium? 8.1 x 10 ^-9 m/s 1.2 x 10^8 m/s 7.3 x 10^8 m/s 9 x 10^-9 m/s
31. ## Physics

Calculate the average speed of the car in km/h, it can accelerate from 96.56 km/hr in 4.3 seconds. Distance is not provided
32. ## Active physics

How much hear must be added to 1.5kg of water at -25degC to raise it up to 119degC?
33. ## Physics

When you jump vertically 0.86 meters above the ground, what is your acceleration when you reach your highest point?
34. ## physics

If a spring has a constant of 20N/m how much potential energy does it store if it is compressed 2m in joules? <3
35. ## physics

how to calcula distance of a object in free fall if only the time it reaches the ground is given
36. ## physics

Two asteroids, each with a mass of 6 million kilograms are attracted gravitationally with a force of 0.75 N. How far apart are their centers?
37. ## Physics

If one used a stiff vertical spring rather than a regular one what would be the results? The gravitational PE and the Elastic PE would decrease. Am i right?
38. ## Physics

A nurse counts 76 heartbeats in one minute. What are the period and frequency of the heart's oscillations?
39. ## physics

What average power is required for a runner with a mass of 80 kg to reach a speed of 8.2 m/s during a time of 1.8 s?
40. ## physics

a pendulum swing with a speed of 1.5 m/s at its lowest point. How high will it rise before it stops
41. ## Physics

A bike starts from rest and accelerates to 20 m/s over a period of 6 seconds. What is the acceleration of the car?
42. ## Physics

How does the conservation of mechanical energy explain why a planet in an elliptical orbit changes speed?
43. ## physics

find the apparent weight of a 18 cm by 12 cm by 6 cm block of concrete with a mass of 1.82 kg that is submerged under water.
44. ## physics

The speed of a train increased from 15 mi/hr to 25 mi/hr in a distance of 500 ft. Calculate the average acceleration in ft/s2.
45. ## physics

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

A runner runs 2.5 km eastward and turns northward to cver twice this distance. What is his displacement ?
47. ## Physics

What is the age in years of a bone in which the ratio 14C/ 12C is measured to be 2.3×10^−13?
48. ## physics 8th grade

If a woman hasa mass of 50 kg calculate her weight in neutons
49. ## physics

a truck moving at 100kph has a mass of 27000 kg. what force is necessary decelerate it at rate of -3 m/s²?
50. ## physics

Write down the unit in which reaction rate is measured in this observation? Equation is Zn(s)+I~ZnI
51. ## Physics

An object initially at rest experiences an acceleration of 9.8 m/s^2. How much time will it take to achieve a velocity of 58 m/s?
52. ## Physics

1. Name three different kinds of graphs that are often used to plot information and discuss the value of each. i have no idea what the heck this means
53. ## physics

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

what do you call the source of an intense narrow beam of coherent monochromatic light?
55. ## physics

A wheel has turned through 120 revs in 10 s after starting. find the angular acceleration.
56. ## Physics

What is the age in years of a bone in which the ratio 14C/ 12C is measured to be 2.3×10^−13?
57. ## physics

how can we derive the work-energy theorem form Newton's second law of motion?
58. ## Physics

What are two quantities of an object launched parallel to the ground which are equal to zero? I think one of the two is vertical velocity.
59. ## physics

if the resultant of 2 equal force inclint to each other at 60° is 8root3N. Find the component forces?
60. ## 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?
61. ## Physics

Billy stands on a hill without slipping. In which direction is the force of friction acting?
62. ## physics engg.

A deutron is moving with a speed of 2*10^8m/s. Find the wavelength of the matter wave associated with it?
63. ## physics

What design aspects of the snowmobile make it particulary useful for travel over ice and snow?
64. ## physics

an iron bar measures 11 cm x 7 cm x 5 cm it is melted down to make a cylinder height of 9 cm what is its radius
65. ## AP Physics

If you are driving 116 km/h along a straight road and you look to the side for 1.0 s, how far do you travel during this inattentive period?
66. ## Physics..PLZ HELP!

The magnitude of the magnetic field 8.0 cm from a straight wire carrying a current of 6.0 A is A) 3.0 ƒÎ ~ T. B) 1.5 ~ T. C) 1.5 ~ T. D) 3.0 ~ T. E) 3.0 ~ T.
67. ## Physics

A cable lifts a 1060-kg elevator at a constant velocity for a distance of 39 m. What is the work done by each of the following?
68. ## physics

Consider the equation -mv0 +3mv0 = 4mvf. Where m and v0 are constants, Solve for vf. Simplify answer.
69. ## 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
70. ## PHYSICS

A race car's velocity increases from 3.6 m/s to 32.4 m/s over a 5-s time interval. What is its average acceleration?
71. ## 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?
72. ## physics

What quantity of energy is represented by 250cm^3 of a gas 100N.m^2 when the temperature is kept constant
73. ## Physics

What is the magnification of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? 0.33 -0.33 1.33 -1.33 I'm thinking B.
74. ## Physics

What is the image distance of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? -13.3 cm 13.3 cm -40.0 cm 40.0 cm
75. ## Physics

A ball travels 200cm in the first 2sec and 220cmin the next 5sec. Find the velocity at 7s
76. ## Physics

An engine works between the two temperatures 200 C and 120 C. Calculate its efficiency in percentage?
77. ## Physics

What is the instantaneous speed 3 seconds into the journey of a car traveling at a constant velocity of 10 m/ s?
78. ## Physics

A 1.15 kg block slides down a 19.0 m long 29.0° incline at constant velocity. How much work is done by friction?
79. ## physics

Can an adult male be rescued from a fall by tying a rope to a car's axle?
80. ## Physics

Given that q = +17 mu C and d = 14 cm, find the magnitude of the net electrostatic force exerted on the point charge q2.
81. ## Physics

KNOWNS: Diverging (convex) mirror Radius of curvature = 60 cm (f = 30 cm) M = 1/5 Hi = 20 cm UNKNOWNS: Ho? Di? Do? EQUATIONS: 1/Do + 1/Di = 1/f M = Hi/Ho = -Di/Do
82. ## physics

When boiling water begins to turn to steam, which of the following remains the same in both the liquid and the vapor?
83. ## physics

If you tried to smuggle gold bricks by filling your backpack, whose dimensions are 63 cm*29 cm*20cm, what would its mass be?
84. ## physics

When boiling water begins to turn to steam, which of the following remains the same in both the liquid and the vapor?
85. ## physics

the height of the mercury in the glass tube thermometer when in melting ice and then steam are 3 cm and 18 cm respectively
86. ## Physics

how much work is needed to stop a 20kg bullet moving with a speed of 150m/s?
87. ## Physics

How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.0 ìC?
88. ## physics

A fisherman's scale stretches 3.5 cm when a 2.1 kg fish hangs from it. What is the spring stiffness constant?
89. ## physics

A 32 kg girl runs up a flight of stairs that is 30 m high. How much work does this require? Not sure how to even start
90. ## physics

At what distance would the repulsive force between two electrons have a magnitude of 8.50 N? I have no idea how to do this problem... can someone help me please... 3x10^-4/8.50?
91. ## Physics

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

2.) A sports car is advertised to be able to stop in a distance of 50m from a speed of 90 km/h. What is its acceleration in m/s^2? How many g's is this (g=9.80 m/s^2)
93. ## physics

A cart travels a constant speed of 2.80 ± 0.01 m/s for a time of 8.80 ± 0.04 s What is uncertainty, &deltax, in the distance, ?
94. ## physics

What is the temperature of an ideal gas whose molecules have an average translational kinetic energy of 3.90 10-20 J? K
95. ## Physics

When striking, the pike, a predatory fish, can accelerate from rest to a speed of 3.6 m/s in 0.11 s . Distance?
96. ## physics

what is the power of a 6 ohm bulb when 3 of such bulbs ar econnected in a 12 volt parallel circuit?
97. ## physics

if an object has a mass of 615grams and a volume of 150cm3 is the density 5.86g/cm3
98. ## physics

Calculate the total force of the atmosphere acting on the top of a table that measures 1.9 m by 2.3 m.
99. ## physics

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

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