# Math/Physics

215,876 results, page 59
1. ## physics

what is the mass of a vehicle traveling at 25 km/hr with a kinetic energy equal to 1 x 10 to the 4th power J?
2. ## physics

how do we calculate the height of a falling ball with a mass of 0.5kg and a velocity of 10m/s.
3. ## 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?
4. ## 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?
5. ## physics

An arc lamp operates at 80V . suggest a method to use it with 240 V d.c. source
6. ## Physics

A 68.5kg man is standing still on an elevator that isn't moving, what is the normal force on him?
7. ## physics

A 2.40- bullet embeds itself in a 1.20- block, which is attached to a spring of force constant 770 .
8. ## physics

the value of acceleration due to gravity is not equal to 10m,give reasons to support
9. ## Physics

.17 kg hockey puck initial velocity 21 m/s stops 62m away. what is coefficient of friction?
10. ## 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
11. ## physics

A 55 kg swimmer crosses a 100 m pool in 12 s. If she moves with a constant velocity, what is her momentum?
12. ## physics

how would you measure the resistance of an electrical device, such as a lamp, by the voltmeter-ammeter method?
13. ## Physics honors

If a racer runs at an average speed of 7m/a how far will she run in 1 min 45 seconds?
14. ## Physics

A standing wave has wavenumber 200 rad/m. What is the distance between two adjacent nodes.
15. ## Physics

Aircraft with acceration of magnitude of 42.5 m/s. If starting from rest how long will it take to travel a 2.6 km runway?
16. ## physics

a train starts from rest ad at the end of 90° seconds has a speed of 10km/h. What is the acceleration?
17. ## 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
18. ## 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
19. ## Quick Physics Question

Are both linear and angular momentum conserved in static equilibrium ?
20. ## Physics

Calculate the momentum of a bullet moving with a velocity of 1000m/s ,if it has a mass of 0.01kg
21. ## 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?
22. ## physics

--------------------------------------- A rugby player of mass 82kg is running at 6.0m/s. How much energy will be needed to stop him? ---------------------------------------
23. ## Physics

A rubber ball of mass 0.12kg is held at a height of 2.5m above the ground, and then released.
24. ## physics

If motion of a particle of mass (m) is given by y=ut+1/2gt^2 (square).find force acting on it
25. ## Physics

If 2.0 J of work is done in raising a 280g apple, how far is it lifted? I would say F= 2.0/180 but that doesn't really sound right...
26. ## Physics

If the cosmic microwave background radiation (CMBR) is at a temperature of 2.7K, what is its peak wavelength?
27. ## Physics

How close would the masses 0.545 kg and 0.109 kg have to be in order for the gravitational force between them to have a magnitude of 1.03 N? Please Help!
28. ## physics

what is the initial velocity (Vyo) of a projectile launched horizontally? why? i know that it is 0 m/s, but i don't know why/how to explain it.
29. ## physics

A stone is dropped from a 100m bridge. How long does it take the rock to reach the ground?
30. ## Physics

At what temperature is the rms speed of helium molecules half its value at STP (0 C}, 1.0 atm)?
31. ## physics

three point charges-1*10^-6,-2*10^-6,3*10^-6.one kept at corners of an equilateral triangle of side 1m.what is potential at centre
32. ## physics

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

a 0.03 mol sample of helium is taken through a cycle. the temperature of state A is 400K. calculate V.
34. ## Physics

A car accelerates from 12m/s to 25m/s in 6.0s. What is its uniform acceleration? How far did it travel in this time?
35. ## PHYSICS

At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 0.40%?
36. ## physics

Find the electric flux through each surface. (Use any variable or symbol stated above along with the following as necessary: ε0.)
37. ## physics

How center mass affects an arrows distance traveled (include source)
38. ## physics

An 80 kg man on a 10 kg stretcher is being pulled upward with constant speed. What is the tension on the rope ?
39. ## Physics "scientists"

* JJ Thomson * a) How does his experiment of cathode ray tube relates to electrostatics? >> PLEASE HELP ME!! :( :)
40. ## physics

A car traveling at +7.2 m/s accelerates at the rate of 0.65 m/s 2 for an interval of 2.4 s. Find vf . Answer in units of m/s
41. ## Physics

Charges q1 and q2 lie on x axis at points x= -a and x= 5, respectively. (a) how must q1 and q2 be related for the net force on charge +Q at x = a/2 to be zero ? (b) and if +Q is placed at x = 3a/2.
42. ## Physics

The body mass is 0.4kg , its hung on a spring with stiffness of 90 N/m What is the frequency of its oscillation?
43. ## physics

why we cannot use visible light for studying the crystal structure using Bragg’s diffraction method?
44. ## physics

A ball was thrown straight up at 20.7 m/s then caught at the same place it was released. How many seconds was it in the air?
45. ## Physics

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

what is the temperature increase of 6.4 kg of water when it is heated by a 7.7*10 square? (cp=4186j/kg*degrees celsius)
47. ## Physics

The distance between any two points in a thermometer is 10cm.mercury level is 13 cm .temperature in Celsius?
48. ## Physics

The body mass is 0.4kg , its hung on a spring with stiffness of 90 N/m What is the frequency of its oscillation?
49. ## 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?
50. ## Physics

How far does a plane fly in 15 s while its velocity is changing from 145 m/s to 75 m/s at a uniform rate of acceleration?
51. ## physics

calculate the work done in lifting a 300N weight to a height of 10 m with an acceleration 0.5m/second square.
52. ## physics

Find the gravitational force of attraction between two balls each weighing 10 kg,when placed at a distance of 1 meter apart
53. ## Physics (HELP)

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

A tennis ball is thrown up in the air. It stays there for 12.1 seconds how fast did you throw it?
55. ## 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?
56. ## physics

5. An object that has kinetic energy must have ____________________. A) momentum. B) acceleration. C) a force applied to it. D) All of these. E) None of these.
57. ## physics

A stone is dropped from a ledge 45m high. What will its speed on reaching the Earth be?
58. ## PHYSICS

a 1500kg sports car accelerates from 0 to 30 m/s in 8 seconds. Whaat is the power of its engine? Please help
59. ## Physics

What is the acceleration experienced by the tip of the 1.5 cm-long sweep second hand on your wrist watch?
60. ## Physics

What happens when you plug more equipment into apower board in terms of it's resistance and current. Explain.
61. ## physics

a baseboard heater draws a current of 10.0A. How much charge passes through it in a time of 30 min?
62. ## Physics

A 0.055 kg golf ball leaves the tee at 50 m/s. what is its change in momentum (impulse) ?
63. ## science/physics

What acceleration will you give to a 25.8 kg box if you push it horizontally with a net force of 89.6 N?
64. ## Physics

Throw a stone straight up in the air. At its highest height what is its speed? Is it accelerating then?
65. ## physics

A 1.25-kg book in space has a weight of 8.35 N. What is the value of the gravitational field at that location? GIVEN: m = 1.25 kg W = 8.35 N Therefore, they want the acceleration. Would I use this equation g = Fg/m?
66. ## Physics

Find the length of a simple pendulum that completes 16.0 oscillations in 52.0 s. CAN YOU PLEASE EXPLAIN SPECIFICALLY , THANK YOU!
67. ## Physics

How long does it take a car to change it velocity from 15m/s if it accelerarate uniformly at 5m/s square?
68. ## physics

A jet travels at 435 m/s. How long does it take to travel 253 m? Answer in units of s
69. ## physics

What is the resistance of a 40 watt light bulb if it is it to full brilliance by a current of .33amps?
70. ## physics

How long does it take light to travel through a 3.2mm -thick piece of window glass?
71. ## short physics question

What is the significance of the fact that both the horizontal force and motion are both forwards?
72. ## physics

a truck travels at 90km/hr W for 10 min. then at 110 km/ hr for 38 km what was the trucks average velocity
73. ## physics

If a car moves at 36km/h accelerate uniformly at 4m/s calculate it velocity in 2 seconds.
74. ## physics

A proton is suspended at rest in a uniform field E.Take into account gravity and determine E.
75. ## physics

how many electrons must be removed from an electrically neutral silver dollar to give a charge of +2.8 uc
76. ## physics

which object will have higher inertia a rock of 20kg or a hollow ball of 22kg
77. ## physics

Why is there always a difference between the experimentally calcuated error for resistance, and the actual components tolerance value?
78. ## Physics

Determine the magnitude of current I3. Let the voltage of the bottom battery VB =13.0 volts and r= 1.0 Ω.
79. ## Physics

Two electrons exert a force of repulsion of 0.96 N on each other. How far apart are they? The elemental charge is 1.602 × 10 −19 C .
80. ## Physics

How does mass affect the motion of objects falling freely under the influence of gravity?
81. ## Physics

A 200N sign hangs and makes a 15.5 angle with the horizontal. What is the Tension in each rope?
82. ## physics

what is the frequncy per minute of a skater making rounds at rink with radius of 2.5 m of her speed is 5 km/hr?
83. ## Physics

A dog is running at 9.1 m/s for 7.8 km. How long did it take him to arrive at his destination? (Give answer in seconds)
84. ## Physics

An object is shot upwards, from the ground, with an initial velocity of 120 m/s. How high will it be after 4.0s?
85. ## Physics

A car travelled at an average speed of 200km/h. What distance does it cover in 10minutes.
86. ## Physics

How much work is needed to stop a 20g bullet moving with a speed of 150ms-1
87. ## physics

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

what is the magnitude and direction of the electric field 20.0 cm cm directly above an isolated 33.0 10 neg6 c charge?
89. ## Physics

Two positive charge of 12cand 8c are 10cm apart each other. The work done in bringing them 4cm closer is
90. ## PHYSICS

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

a 1500kg sports car accelerates from 0 to 30 m/s in 8 seconds. Whaat is the power of its engine?
92. ## physics

Yeah I know it is! But it's really confusing me and it's what my teacher wants. Say I was to pick a height of 25m and a Velocity of 20.0m/s, what would be my next step?
93. ## physics

what has no beginning and no end. it is also considered as the medium for light in einstein's theory of relativity
94. ## physics

using well labelled diagrams,briefly describe how you would determine the density of an irregular object
95. ## physics

From what height would a compact car have to be dropped to have the same kinetic energy that it has when being driven at 100 km/h?
96. ## Physics

Find the net force and the acceleration for the situation below. 30N 20N <---------------[ 5.1kg]---------->
97. ## physics

A ball is thrown vertically upward at 14.7 m/s. Show that its maximum height will be 11m.
98. ## Physics

How would I find final velocity at the top of an inclined ramp with a given angle theta?
99. ## physics

Two masses are hanging over a frictionless, massless pulley as shown blocks_pulley_aMass m1 is 5.0 kg and mass m2 is 7.0 kg
100. ## Physics

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