# Math/Physics

214,834 results, page 55

1. ### physics

find the resistance of 134m of No.20 copper wire at 20 degrees C (p=1.72x10^-6Ohom cm , A= 2.07x10^-2 cm ^2)
2. ### Physics

Assume the distance axis is linear and da = 10.0m and db = 35.0 m. Estimate the work done by a force F in moving a 2.80 kg object from da to db.
3. ### Physics

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

A hypothetical planet has a mass 1.55 times that of Earth, but the same radius. What is g near its surface?
5. ### 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?
6. ### physics

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

A radio station is broadcasting at 90.7 mhz. compute for its wavelength in angstrom and energy in kilojoules.
8. ### Physics

A football player kicks with a speed of 21 m/s at 37 degree to the horizontal. How long is the ball in the air?
9. ### Physics

Billy stands on a hill without slipping. In which direction is the force of friction acting?
10. ### Physics

1. Given t1/2 to be 0.0137 seconds, how long should it take to reach 87.5% of maximum charge?
11. ### physics

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

What is the magnitude and direction of an electric field that exerts a 4.00 ✕ 10 -5 N upward force on a - 1.80 µC charge? N/C
13. ### Physics

If the force of repulsion between two socks is .003 and they are 2 cm apart what is the charge on each sock
14. ### mathematical physics

Solve the following ODE using the power series method (1-x^2)y"-2xy'+2y = 0
15. ### mathematical physics

Obtain all the first and second order partial derivatives of the function: f( x, y ) = In(I+xy^2)
16. ### mathematical physics

Solve the following ODE using the power series method (1-x^2)y"-2xy'+2y=0
17. ### 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
18. ### physics

two point charge q1=50c , q2=10c are lactated at (-1,1,-3)m, and (3,1,0)m, respectivly. Find the force on q1.?
19. ### physics

a boy drops a mango from a tree it falls without rebound what happens to it's momentum
20. ### Physics

Two pellets, each with a charge of 1 microcoulomb, are located 3 cm apart. What is the electric force between them?
21. ### Physics

What is the velocity of an object that is dropped from a height of 20m,just before it reaches the ground?
22. ### Physics

In an AC circuit with a frequency 25 Hz producing an rms voltage of 30 V and a 20 farad capacitor, what is the end current?
23. ### physics

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

14,0 of KOH is neutralised in 1dm^3 of water by sulphuric acid with a concentration at 0,1 mol dm^-3 how do i calculate it
25. ### physics

Calculate the work done if a force of 300N Is applied at 30° to the horinzontal and body moves 20m
26. ### 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.
27. ### physics

how many energy is transferred when 8.9g of liquid hydrogen changes to gas -253 degree celsius
28. ### Physics 2

If water at 0 oC is heated, it actually decreases in volume until it reaches Select one: a. 1 oC. b. 2 oC. c. 3 oC. d. 4 oC. e. 5 oC.
29. ### PHYSICS

A hypothetical planet has a mass 1.49 times that of Earth, but the same radius. What is g near its surface?

A man walks for 5 km/hr for 1 km and 7 km/hr for next 1 km. What is his average speed for the walk of 2 km? -5.8 km/hr -6.0 km/hr -2.0 km/hr -1.0 km/hr Thank you very much!!
31. ### Physics

A car travels in a straight line for 2.9 h at a constant speed of 77 km/h . What is its acceleration? Answer in units of m/s^2
32. ### physics(measurement)

What accurate method can be used to determine the thickness of a coin. Explain pls..
33. ### Physics-VECTORS

Find the vector's magnitude and direction. Part A A⃗ = 4 i^− 8 j^ A =? θA =?
34. ### Physics

A student walks from her apartment a distance d=139m to the bus stop at a speed of v1= 1.40m/s.
35. ### Physics

Q: A car travels in a straight line for 4.6 h at a constant speed of 95 km/h . What is its acceleration? Answer in units of m/s 2
36. ### University physics

prove the following rules if True or False using Boolean algebra (a)A+AB = A+B (b)(A+B)(A+C) = A+BC
37. ### Science - Physics

Find the x-component of vector v⃗ = (310 m/s , 45 ∘ above +x-axis).
38. ### physics

A football is kicked with an initial velocity v=9i+12j. Find the speed in (m/s) of the ball after 2.4s A) 9.2 B) 10.8 C) 12 D) 15
39. ### physics

calculate the work done on n mole of a vander waal gas is an isothermal expansion from volume vi to vf.
40. ### Physics

A ball is released and allowed to fall freely. How far will it have fallen in 2 seconds?
41. ### Physics

A car is traveling North. In which direction are the wheels turning. This is under the torque chapter
42. ### Physics

A car is traveling North. In which direction are the wheels turning. This is under the torque chapter
43. ### physics

Two identical charges, each -8.00 x 10-5 C, are separated by a distance of 25.0 cm. Find the electric force between them?
44. ### physics

A tire rotates 140 rpm, how many rotations have been completed in 20 seconds?
45. ### physics

a term is related as at=bt2 + ct3 +d,if 'a' has dimension of power,find the dimention of 'b','c' and 'd'......'t' is the time
46. ### Physics

How far above the surface of the earth would you have to be before your weight is reduced by 13.52%?
47. ### Physics

An automobile is traveling 50 km/h². It deccerate at 5 m/s², how far will it take to travel after the brake are applied?
48. ### physics

What would be the orbital speed and period of a satellite in orbit 1.50 ✕ 10^8 m above the Earth?
49. ### Physics

2.An airplane flies north at a constant speed of 220 km/h. How far will the plane travel in 3.50 h?
50. ### Physics

how long does it take a car to change its velocity from 15m/s to 25m/s if it accelerates uniformly at 5m/s2.
51. ### physics

What force is required to slide a 200 kg box up a 25 degree incline if the coefficient of friction is 0.60?
52. ### physics

a beam of electron 13.0 ev is used to bombard gaseous hydrogen. what series of wavelengths will be emitted?
53. ### Physics 1100

Find theta; and W in the figure below where w1 = 21.0 N, w2 = 34.0 N, and α = 64.0°, assuming that the arrangement is at rest.
54. ### physics

What is the magnitude of F? Assume the acceleration due to gravity is 9.8 m/s 2 and the surface is frictionless. Answer in units of N.
55. ### 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)
56. ### 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
57. ### physics

A car traveled 1000 kilometers from krui to Jakarta in 15 hours. What was its average velocity?
58. ### physics

what is the potential energy of 4 point charges each of value Q at the corners of a square of side length a.
59. ### 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
60. ### physics dimensions

the displacement of a particles is given by S=A+Bt+Ct^2.deduce the values of the constant A,B,and C appearing in the equation
61. ### physics dimension

write down the dimensions of moment of inertia and surface tension coefficient.
62. ### Physics

How much work does a weightlifter do on a 450 N barbell thathe lifts 2m into the air
63. ### Physics

A ball is thrown straight up at 24.0 m/s. Ignore the effects of air resistance in your calculations.After 2.00 s?
64. ### Physics

A bullet fired vertically upwards reaches a height of 500m. [g=9.8m/s2]. What is its initial velocity?
65. ### Physics

A truck starts from rest and accelerates at 2.0 m/s² for 4.0 s. How far will it have gone at the end of this time?
66. ### Physics

why do photoelectrons emitted from a metal surface has energy distribution for an incident radiation of frequency?
67. ### Physics

What would the experimental value of g be if the slope of the graph represents 1/2 g and the equation is y=5.00x-.0109639087
68. ### Physics

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

Find the time constant (T) for the RC circuit with an open switch given t = 10 ms 50% of Qmax charge T = ? Q = CV (1-e -t/T)
70. ### Physics

How do you determine the correct value of angular velocity to use when calculating centripetal force?
71. ### Physics

If it takes an object 68 seconds to make 16 rotations, what would be the period of rotation? T=16/68 Is this right?
72. ### physics

calculate the electrostatic force between charges of -2.4 µC and +5.3 µC, placed 58cm apart in a vaccum.
73. ### physics

determine the thrust produced if 1.5 x 10^3 kg of gas exits the combustion chamber each second, with a speed of 4.00 x 10^3 m/s
74. ### Physics

Determine the acceleration of an electron placed in a constant downward electric field of 4.0X10^5N/C.
75. ### Physics

It took a car driver 30min to travel a distance of 50km. What is the average speed?
76. ### PHYSICS

Calculate for Bohr's atomic model the speed of the orbiting electron in the n = 7 state. (Answer in m/s)
77. ### physics

find the angle of projection at the horizontal range is twice the maximum height of a projecyile
78. ### Physics

A 3200 lb car traveling at 30 mi/hr speeds up to 60 mi/hr. How much useful work was supplied by the engine?
79. ### Physics

With what maximum speed can an unsecured passenger stay in their seat on a Ferris wheel that has a diameter of 12 m.
80. ### Physics

An electric kettle has a power of 1.2kw. How long will it take to heat 3 kg of water to the from 20¡ãC to 100¡ãC?
81. ### physics

What is the speed of a transverse wave in a rope of length 1.90 m and mass 65.0 g under a tension of 465 N?
82. ### 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
83. ### physics

a body starting from rest attains a speed of 8 m/s in 2 seconds. find the acceleration of the car.
84. ### PHYSICS ROLLING MOTION!!!

A unicycle with a tire 44.0 cm in diameter travels 2.00 km. How many revolutions does the wheel make?
85. ### physics

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

What is the mass of water in a closed room 5.2m x 6.3m x 2.5m when the temperature is 24 degrees celsius and the relative humidity is 65%?
87. ### Physics

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

show the expression v=at is dimensionally correct where v represents speed an acceleration and t is instant time?
89. ### physics

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

A stone is thrown up with a velocity of 39.2 at an angle of 30° above the horizontal find at what times, it will be at a height of 14.7
91. ### physics

What is the strength of intermolecular forces in methylated spirit, acetone, water, glycerin and oil
92. ### Physics

Find the longest wavelength by resonating air in 20 cm tube which is opened both ends
93. ### Physics

A skier slides down a frictionless slope of angle 30, is the mechanical energy conserved?
94. ### physics

a pendulum swing with a speed of 1.5 m/s at its lowedt point. How high will it rise before it stops
95. ### PHYSICS topic is pressure

Why does a person feel difficult to breathe when he is in a deep well? Please answer!!!
96. ### Physics

How much work is required to lift a bag of wheat (mass 50kg) to a height of 2.4m?
97. ### Physics

Calculate the work done by a 300N Force moving a 20kg object a distance of 50m
98. ### Physics

Calculate the skid-to-stop of a car travelling oa a road at 100km/h with a coefficient of friction of 0.68.
99. ### Physics

The sun is 30 ∘ above the horizon. It makes a 54 m -long shadow of a tall tree.
100. ### Physics

Jennifer swims 4 complete lengths of a 50m pool. What distance did she swim? What is her displacement?