# Math/Physics

214,413 results, page 39

1. ### physics

calculate the de-broglie wvelenth of the electron orbitting in the n=2 of hydrogen atom
2. ### physics

Explain the difference between a GET and MOSFET on the basis of their construction and working
3. ### Physics

How much energy is required to ionize hydrogen when it is in the state with n = 6? (answer in eV)
4. ### physics

compute the mass of the following assuming if it to be a sphere of radius 6370km
5. ### physics

state or law which explains why a ship can easily sink than overturn?
6. ### Physics/Cars

Does the mass of the car matter when driving on the road? When skidding?
7. ### physics

How much energy is needed to heat and melt 3.0 kg of copper initially at 83°C
8. ### PHYSICS

Why do objects gain mass while approaching the speed of light
9. ### physics

what is the importance/significance of calculating the magnetic flux density of a solenoid?
10. ### physics

Find the relation between phase difference and path dofferense
11. ### physics

A proton is confined to a nucleus of radius 5 FM.what's the minimum uncertainty in momentum?
12. ### physics

a woman drives at a speed of 70 mph how many miles does she travel in 24 minutes
13. ### physics

Michael, whose mass is 80 kg, runs at a speed of 3 m/s. What is his kinetic energy?
14. ### Physics

When projectile angle is 45°what is the relation between maximum height and range
15. ### physics

Calculate the momentum of a 100 kg object moving with velocity 10m/s
16. ### physics

Calculate the momentum of a 100 kg object moving with velocity 10m/s
17. ### Physics

If a man walks 4 km east and then 5 km south. How far is he from the point where he started?
18. ### physics

Distance travelled by a ball dropped from a cliff in the 10th second.
19. ### physics

how much work is done when 100 kg lifted 5 meters above the ground
20. ### physics

Find the density of the earth if its mass is 6×10^3kg and radius is 6.4×10^3km
21. ### Physics

what must be the net force if a 19.9 kg mass accelerates to the left at a rate of 2.2m/s^2?
22. ### Physics

Find, to 3 decimal place, the frequency of the hour hand of a clock
23. ### physics

How much work is required to lift a 5.2-kg concrete block to a height of 3.1 m?
24. ### mathematical physics

Using Stokes' theorem evaluate ∫c F.dl where F = yi^+ xz^3 j^-z y^3 k^ and C is the circle x^2+ y^2 = 4; z = -3.
25. ### physics

How much heat is necessary to change 345 g of ice at -11°C to water at 20°C?
26. ### physics

How much heat is necessary to change 345 g of ice at -11°C to water at 20°C
27. ### Physics

A 20 kg block is placed on a 35 degree ramp. What is its true metric weight?
28. ### physics

some rocks melt at 1800farenheit. what is the temperature in the celsius scale ?
29. ### Physics

The density of an object is 1500kgm-3, the mass is 10000g find the volume
30. ### Physics

What are some scientific questions that can be asked about projectile motion?
31. ### physics

A gas occupies 20 dm³at 30°c at 2.5 atm find its volume ayt s.t.p.
32. ### Physics

Which of the following is an element? H2O Hydrogen Carbon dioxide A supernova
33. ### physics

A stone is thrown vertically upward at 23 m/s. How fast is it moving when it reaches 14 m?
34. ### physics

Which of the following statements is false regarding the ‘drift’ of charge carriers?
35. ### physics

if r1=2ohms, r2=4ohms, r3=6ohms. Then what is the voltmer reading connected in series
36. ### physics

What is the pressure of the water in pascals at the bottom og a lake which is 5 meters deep?
37. ### Physics

What is the reaction of the earth pulling down on a pen that is lying on a table
38. ### physics

A bicycle starts from rest and reaches 6.0 m/s after 4 seconds. What is its acceleration?
39. ### physics

Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.
40. ### physics

Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.
41. ### Physics

If a force of 15kg. wt acts on a mass of 14 kg, what will be its velocity after 8 seconds?
42. ### physics

how much work is done if a force of 12N moves an object a distance of 5m
43. ### Physics

What is the work done when a force of 30Newtons moves through a distance of 20Meters?
44. ### Physics

if a molecules in a solid has a temp of T = hf/2k then what would be the average energy of vibration
45. ### physics

How does a washing machine's 'spin cycle' expel water from clothes?
46. ### physics

Explain why helicopters need 2 rotors to fly in a straight line.
47. ### physics

ifv=(3i+4j+5k)m/s is the instantaneous velocity of a body mass 1.50kg calculate its K.E
48. ### Physics

What is the period of a wave that travels through a spring at 2.5 m/s and has a wavelength of 1.3 meters?
49. ### Physics

1.A Speed Of A Bullet Of Mass 20g Is 200km/h. What Is The Kinectic Energy.
50. ### Physics

How much force does it take to push an 80 lb. steel cart on wheels?
51. ### Physics

calculate K.E in Joules of a baseball w/ a mass of 237.2 cg moving at 85.00 mph
52. ### Physics

How meny watts need to up the 18kg in 4mtr per 15 second
53. ### physics

What is the effect of increasing the inclination of the track to the acceleration of the rider in the experiment?
54. ### Physics

When a mass is hung from a spring stretches it by 15 cm. What is the period of the oscillations of this system?
55. ### physics

Cylinder water tank 80cms height 1000liters what is its diameter
56. ### physics

If a car has a mass of 400 kg and a velocity of 30 m/s to the east, what is the magnitude of its momentum?
57. ### Physics

Find the centripetal acceleration of a car that rounds an 80 m radius curve at 10 m/s.
58. ### PHYSICS

If that charge is 3.7 μC , by what percentage does the mass of a 31 g comb change during charging?
59. ### physics

What force is needed to accelerate a child on a sled (total mass = 60 kg) at 1.25 m/s2?
60. ### Physics

How much heat is needed to melt 14.3kg of silver that is initially at 44°C?
61. ### Physics

Which of the following wavelengths will produce standing waves on a string that is 1.9 m long? A.1.9 B.3.3 C.3.5 D.95
62. ### physics

a skydiver has amass of 140 kg.at what speed will she have a momentum of 10,000 kg m/s?
63. ### physics 1

what is the peiod of vibrating object which an acceleration of 8.0m/s .when its displacement is 1.0m?what should be the answer?
64. ### physics 1

what is the peiod of vibrating object which an acceleration of 8.0m/s .when its displacement is 1.0m?what should be the answer?
65. ### Physics

A charge q is placed at h distance from the base of centre . Find the flux ?
66. ### Physics

In what part of the electromagnetic spectrum does the wavelength 0.0141 nanometers belong in?
67. ### physics

lighted matchstick brought near the negatively charged electroscope
68. ### physics

Two instances during which the heating effect of current is not required
69. ### Physics

What effect do the following forces have on point? 100N, 30 degrees E of N
70. ### physics

Instances where the heating effect of current is not required. Plssss helllp
71. ### physics

Instances where the heating effect of current is not required. Plssss helllp
72. ### Physics

A car travels at a speed of 70km/h. What distance will it cover in 30 minutes
73. ### Physics

A car travels at a speed of 70km/h. What distance will it cover in 30 minutes
74. ### physics

if a body moves 3m north,then 4m East and finally 6m South.what will be the displacement?
75. ### Physics

Does the speed of sound in air depend on the frequency of the wave? V=[(gamma.RT)/M]^(1/2)
76. ### Physics

A 900 W toaster operates for 2.50 minutes. How much energy does it use?
77. ### physics with algebra

what is the area, and its approximate uncertainty, of a square of side 3.1x10^4 cm?
78. ### physics

A car accelerates from rest at -2.10 m/s2. a. What is the velocity at the end of 4.0 s? b. What is the displacement after 4.0 s?
79. ### Physics

When an object is moving at a normal speed, is it's weight larger than when it's stationary?
80. ### Physics

What’s the specific heat of a material if it takes 6.5 kJ to increase the temperature of a 1.8 kg sample by 6.4 ∘C ?
81. ### physics

Why air pressure in a car tyre increases during driving?
82. ### Physics

Does a ball that is rolled on a floor speed up before slowing down?
83. ### Physics

C:\Users\Kristi\Pictures\Screenshots\Screenshot (691).png
84. ### Physics

When striking, the pike, a predatory fish, can accelerate from rest to a speed of 3.6 m/s in 0.11 s .
85. ### Physics

An adventurous aardvark arduously ambles from (3.0, 2.0) m to (−4.0, −2.0) m. What is the displacement in polar coordinates?
86. ### Physics

METEOR SHOWER (Acceleration or Not) PLease choose the correct answer.
87. ### Physics

What’s the deceleration of a juggernaut to stop from 45m/s by constantly decelerating at 9m/s 2(squared) ?
88. ### Physics

Find the displacement in cubic meters of a boat weighing 4710 N.
89. ### physics

An electron experiences an electric force of 0.70 nN . What’s the field strength at its location?
90. ### physics

Athelet meseret defar runs at 10m/s. How long will take her to go?
91. ### Physics

At what temperature, in degrees Celsius, is the speed of sound in air 341 m/s?
92. ### Physics

If ∑ n=0 to inf of 3x^n/n! is a Taylor series that converges to f(x) for all real x, what is the value of f ''(0)?
93. ### Physics

Does angular acceleration on a spinning disk increase centrifugal force?
94. ### Physics

A 2200. Kg vehicle is traveling at 26 m/s what is the force needed to stop it in 21 seconds?
95. ### Physics

An truck with a mass of 3500 kg travels with a velocity of 22.0 m/s. Find the momentum.
96. ### physics

The x-component of an electric field vector E = (200 N/C, 45 deg) is ___N/C.
97. ### physics

the number of waves of wavelength 6000 angstrom in a path of 2 cm in vacuum are
98. ### Physics

Equation y=5 sin(3x-4) determine the freguency,speed,period of waves
99. ### physics

describe how the values of resisitivity determine the uses of material in industry ???
100. ### Physics

Please who can help me out. Derive the coefficient of surface tension for water