Math/Physics

208,687 results, page 53

Physics

If you wish to warm 100 kg of water by 20° C for your bath, show that 8370 kJ of heat is required.?

Physics

torque to move a block of m=200kg for 10m at an angle of 25 degree with a speed of 20m/s.

physics

two vectors A and B each have magnitude 220 and angle BETWEEN THEM IS 120 WHAT WILL BE RESULTANT?

Physics

I don't understand this question... What is the change in entropy for a system that has 250 J of heat added to it at 25°C? (Points : 1) 10 J/K 0.84 J/K 0.84 J/K 10 J/K

physics

What are the principles behind seatbelts and air bags that make passengers safer in a collision?

physics

explain the input energy and out put energies of two kitchen machines

Physics

explain the input energy and out put energies of two kitchen machines

physics

explain the input energy and out put energies of two kitchen machines

physics

The mass of an iron cube having an edge length 1.8 cm is 70 g. Find itd density.

Physics

If an object has a work of 300J and a displacement of 20m, how would I determine the net force?

physics

a bus decreases its speed from 80kmh-1to 60kmh-1 in 5 sec find the acceleration

PHYSICS

A point source of a wave emits 195 watts. What is the intensity at a distance of 4.56 meters? I =

physics

Things around you are emitting infrared radiation that includes the wavelength 1.44 10-5 m. What is the energy of the photons?

Physics

What is the partial pressure of water on a day when the temperature is 25C and the relative humidity is 33% P=___Pa

Physics

A golf ball struck with an initial speed of 41.8m/s. What is the range of the shot if the launch angle is 30.0º?

Physics

A vibrating point on a spring travels 60 mm during three cycles. What is the amplitude of the vibration?

Physics

8.2 kg of ice is taken from a temperature of -49 C into steam at 123 C. What is the energy used? Q_total =

physics

What is the free-fall acceleration in a location where the period of a 2.87 m long pendulum is 3.4 s? Answer in units of m/s 2

physics

The elastic potential energy of an object may be negative Select one: True False

physics

if a train at 72kmphr is to be brought to rest in a distance of 200 m then its retardation is A 20m/s^2 b 10m/s^2 c 2m/s^2 d 1m/s^2

physics

Find the work done by 2.32 moles of an ideal gas if its volume doubles at a constant temperature of 22.6°C.

Physics

A 2.73 kg particle has a velocity of vx = 6.02 m/s and vy = 0.316 m/s. Find the magnitude of its total momentum. Answer in units of kg · m/s

physics

How much force is needed to accelerate a 50kg rider and his 250kg motorcycle at 4m/s27

Physics

if the mass of two balls is 0.300 kg each then what is the gravitational force between them if the distance is 0.3000 m

physics

An aircraft on its take-off run has a steady acceleration of 3.0 m/s2. It's velocity after 10 seconds will be

physics

what must be the mass of the log to be lifted up by the hand, if the muscle cross sectional area is 17 cm^2?

physics

If you heat a thin circular ring in a oven, does the rings hole get larger or smaller.why?

physics

If a nuclide has a decay constant of 10^-6 s-1 what is its half life ??? I think it is 0.693 / 10^-6 = 693000 or 6.93 x 10^5 Is this right ...

physics

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

Physics

What is the magnitude of the electric force between a proton and an electron when they are at a distance of 2.63 Angstrom from each other?

physics

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

physics engg.

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

Physics

What electric field strength would store 17.5J of energy in every 9.00mm3 of space?

Physics

Calculate the average speed (in km/h)of Larry, who runs to the store 3.6 kilometers away in 40 minutes.

Physics

What is the peak current through a 400–W room heater that operates on 120–V AC power?

Physics

How long does it take a vehicle with 40hp to achieve 25m/s(meters per second)?

Physics

An object that starts from rest completes 7 revs in 3 seconds. What is angular accel. in rad/s2?

Physics

If I dropped a bowling ball from the empyre state building, at what velocity would it descend?

physics

A car travels in a straight line for 2.8 h at a constant speed of 53 km/h . What is its acceleration? Answer in units of m/s 2

Physics

What is the minimum energy needed to change the speed of a 1600 kg sport utility vehicle from 15.0 m/s to 40.0 m/s?

Physics

A 0.50 kg hammer is taken on a space mission. What is its weight on a planet where the acceleration due to gravity is 3.8 m/s2? 0.50 kg 1.9 kg 0.50 N 1.9 N

physics

A car travels in a straight line for 3.9 h at a constant speed of 63 km/h. What is its acceleration? Answer in units of m/s2

Physics

700 kg plane is traveling at 90 m/s at altitude of 1500 m what is planes total mechanical energy

physics

A dart is thrown horizontally toward X at 30 m/s as shown. It hits Y 0.29 s later. The distance XY in centimeters is:

physics

A bus moves from rest with a uniform acceleration of 2ms(square)for the first 10s.

physics

How can the equation be prove:maximum height,time of flight and maximun range in projectile?

physics

What force F must be applied to the small piston to maintain the load of 49 kN at a constant elevation?

physics

How high must your roof be to fire 1.2km if it fires at 450 m/s muzzle velocity?

physics

a boy pulls a bucket of water of mass sky from a well of depth 10 cm calculate the work done ?

physics

Calculate the velocity of a skateboarder who accelerates from rest for 6.7 seconds down a ramp at an acceleration of 6.5 m/s2

physics

what should the ratio of mass to volume be when considering the flight of a hot air balloon.

physics

A 4.53 kg particle has a velocity of vx = 3.98 m/s and vy = −3.16 m/s. Find the magnitude of its total momentum. Answer in units of kg · m/s

Chemistry Physics

What is the wavelength of an electromagnetic wave with frequency 50.0 MHz? Am I starting this problem like this? 3.00*10^8/50*10^6 =6*10^12

Physics

A guitar string has a mass of 30g and length of 2m. Find the tension if its density is 0.2kg/m^3

Physics

I don't understand how to do this : A force of 40 N accelerates a 7.17 kg block at 6.0 m/s2 along a horizontal surface. Determine the normal.

Physics

A 4.26 kg block starts up a 33.0 degree incline at 7.81 m/s. How far will it slide if the coefficient of kinetic friction is 0.23?

physics

a 50 gram object is accelerating at a rate of 5 m/s2. calculate the force needed to produce this acceleration

physics

A guitar string 61.8 cm long vibrates with a standing wave that has three antinodes. Which harmonic is this?

Physics

. How much potential energy does the 2.5 kg rock sitting on an 18 –meter high cliff have?

physics

how much heat is needed to raise the temperature of 5kg of silver from 20 degrees C to 96 decgrees C?

physics

hummingbirds beat their wings 1500 times in 30seconds calculate frequency and the period

Physics

A 3kw engine operates for 3secs, 10kgf force is applied find the Displacement.

Physics

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

Physics

How much is needed to melt an ice cube, 3 centimeters on each side at 0 degree celcius?

Physics

Find the magnitude of the sum of two forces, one 24 N and the other 9 N, when the angle between them is 60.0o.

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)

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.

Physics

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

PHYSICS

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

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?

physics

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

physics

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

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?

Physics

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

Physics

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

physics

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

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

Physics

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

mathematical physics

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

mathematical physics

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

mathematical physics

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

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

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.?

physics

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

Physics

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

Physics

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

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?

physics

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

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

physics

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

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.

physics

how many energy is transferred when 8.9g of liquid hydrogen changes to gas -253 degree celsius

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.

PHYSICS

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

Physics-PLEASE HELP

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!!

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

physics(measurement)

What accurate method can be used to determine the thickness of a coin. Explain pls..

Physics-VECTORS

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

Physics

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

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

Pages

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20
  21. 21
  22. 22
  23. 23
  24. 24
  25. 25
  26. 26
  27. 27
  28. 28
  29. 29
  30. 30
  31. 31
  32. 32
  33. 33
  34. 34
  35. 35
  36. 36
  37. 37
  38. 38
  39. 39
  40. 40
  41. 41
  42. 42
  43. 43
  44. 44
  45. 45
  46. 46
  47. 47
  48. 48
  49. 49
  50. 50
  51. 51
  52. 52
  53. 53
  54. 54
  55. 55
  56. 56
  57. 57
  58. 58
  59. 59
  60. 60
  61. 61
  62. 62
  63. 63
  64. 64
  65. 65
  66. 66
  67. 67
  68. 68
  69. 69
  70. 70
  71. 71
  72. 72
  73. 73
  74. 74
  75. 75
  76. 76
  77. 77
  78. 78
  79. 79
  80. 80
  81. 81
  82. 82
  83. 83
  84. 84
  85. 85
  86. 86
  87. 87
  88. 88
  89. 89
  90. 90
  91. 91
  92. 92
  93. 93
  94. 94
  95. 95
  96. 96
  97. 97
  98. 98
  99. 99
  100. 100