# Math/Physics

214,567 results, page 51

1. ### physics

Resultant displacement from 12m east to5m north to9m vertically upward
2. ### PHYSICS

A Carnot type engine has a reservoir of 1000 K with an efficiency of 50%. Find the temperature of the sink.
3. ### physics

A car starts from rest and accelerates for 2.8 s with an acceleration of 2.1 m/s2. How far does it travel? Answer in units of m
4. ### physics

the two crates 40-kg and 60-kg are to be accelerated upward to a ship at the rate of 0.30-m/s2 determine the tension in each rope ?
5. ### physics

a container has a height of 50 cm and a width of 20 cm and a depth of 15 cm. if you stack three on top of each other, how tall will it be?
6. ### physics

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

calculate the work done in lifting a 300N weight to a height of 10m with an acceleration 0.5 m/s square.
8. ### 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)

A car accelerates from rest at 4.9 m/s2. How much time does it need to attain a speed of 6 m/s?
10. ### Physics

A car initially moving at 15 m/s accelerates at 4.5 m/s2 over a distance of 10 m. Find the final velocity?
11. ### physics

Calculate the amount work done on 60 N of force is used to move an object a distance of 4.0 meters
12. ### physics

A stone is thrown vertically upward with a speed of 22.0 m/s. How fast is it moving when it reaches a height of 12.0 m?
13. ### physics

A jet travels at 490 m/s. How long does it take to travel 227m? Answer in units of s
14. ### physics

A car travels in a straight line for 4.9 h at a constant speed of 73 km/h . What is its acceleration? Answer in units of m/s2
15. ### Physics

A dog is running at 3.0 m/s for 3.6 km. How long did it take him to arrive at his destination? (Give answer in seconds)
16. ### physics

A car travels in a straight line for 5 h at a constant speed of 73 km/h . What is its acceleration? Answer in units of m/s2
17. ### Physics

How high will a 1.60-{\rm kg} rock go if thrown straight up by someone who does 75.0 J of work on it? Neglect air resistance.
18. ### physics

a football is kicke with a velocity of 20 m/s at an angle of 40 degrees with the ground. Find the components. Key: 4 m/s = 1 cm
19. ### physics

If a race car completes a 2.8 mi oval track in 41 s, what is its average speed? Answer in units of mi/h
20. ### physics

A particle at rest undergoes an acceleration of 2.9 m/s2 to the right and 2.6 m/s2 up. What is its speed after 5.3 s? Answer in units of m/s
21. ### physics

what maximum height will a 311.2 m drive reach if it is launched at an angle of 17.0 degrees to the ground
22. ### physics

A car starts from rest and accelerates for 6.5 s with an acceleration of 3.6 m/s2. How far does it travel? Answer in units of m
23. ### physics

How do we compensate for thermal expansion /contraction in the construction of metal pipes for carrying steam?
24. ### physics

Name Two solid materials having very low linear expansivity ?
25. ### physics

A liquid expands on heating. Explain briefly how its density will change with rise in temperature
26. ### physics

Name Two solid materials having very low linear expansivity ?
27. ### physics

A liquid expands on heating. Explain briefly how its density will change with rise in temperature
28. ### physics

a rock was thrown at the height of 50.0 m above the ground with an initial velocity of 20.0 m/s straight upward.
29. ### physics

A women walks 2m in the direction 60degrees north of east. find her final displacement.
30. ### physics

A women walks 2m in the direction 60degrees north of east. find her final displacement.
31. ### physics

A car starts from rest and accelerates for 6.7 s with an acceleration of 1.6 m/s2 . How far does it travel? Answer in units of m
32. ### Physics

From the position vs time graph of an object moving with constant acceleration, how could you find the velocity
33. ### physics

A ball is thrown straight up with an intial velocity of 85 ft/s. At what times will it have a height of 200 ft?
34. ### physics

A 8.2 kg object undergoes an acceleration of 2.5 m/s2. What is the magnitude of the resultant force acting on it? Answer in units of N
35. ### Physics

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

A 3.00 kg rock is dropped from a bridge and strikes the water below with a velocity of 40.0 m/s. What is the momentum at impact?
37. ### physics

How far (in meters) must a 800 kg pile driver fall, if it is to do 18000 J of work?
38. ### physics

How much work in joules must be done to stop a 5000 kg car traveling at 120 km/hr?
39. ### PHYSICS HELP

what is the minimum amount of energy required to accelerate horizontally a 3.0g bullet from rest to a speed of 40.0 m/s?
40. ### Physics

A woman drops a basketball, how far does it fall in one second? use formulas
41. ### physics

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

What is the resonant frequency in an RLC circuit if R=5 , C=6, and L=12 mH, and V-115 V? (a) 593 (b) 41,400 (c) 1560 (d) 1793
43. ### physics

What is the magnitude of the momentum of a car weighing 1,555 N when it is moving at a speed of 23 m/s? Express your answer in kg m/s.
44. ### physics

A drag racer accelerated from 0 to 475km/h in 4.88 s. Assuming a constant acceleration, how far did it travel?
45. ### physics

A 8.20 cm tall object is placed 30.0 cm in front of a concave mirror with a focal length of 4.20 cm. What is the magnification?
46. ### physics.pls help

A 100g bird siis in its nest. what is the Fnet(net force) in this case?
47. ### Physics

What is the speed of a transverse wave in a rope of length 1.50 m and mass 69.0 g under a tension of 500 N?
48. ### Physics

A car slows to a stop over a certain distance. What could cause the stopping force to be greater?
49. ### Physics

What exerts the force obn a rocket in outer space to make it move forward?
50. ### physics

What is the acceleration experienced by the tip of the 1.5 cm long sweep second hand on your wrist watch
51. ### physics

a car accelerates along a straight road from the rest to 90 km/h in 5 s what is the magnitude of its average acceleration
52. ### Physics

Air in a balloon does 25 J of work while absorbing 81 J of heat. What is the change in internal energy?
53. ### physics

how long does a car with an acceleration of 2.0 m/s^2 take to go from 10m/s to 30m/s?and show the solution how do you get the answer.
54. ### physics

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

A family drives 400 milles in 8 hours. Explain how the acceleration of their car changed?
56. ### physics

A family drives 400 milles in 8 hours. Explain how the acceleration of their car changed?
57. ### Physics

How much energy is stored in the 120 uf capacitor of a defibrillator if the potential across the plates is 4 x 10^3 V?
58. ### physics

if a 40.0-g stone is whirled horizontally on the end of a 0.60-mstring at a speed of 22m/s what is the tension in the string?
59. ### Physics

How much heat energy is required to convert 0.1000kg of ice at -10.0 C into water at 50 C?
60. ### Physics

A dynamics cart m1 attached to has a hanging mass m2 m1 = 0.20 kg, and m2 = 1.3 kg. The magnitude of the acceleration of this system will be what approximately?
61. ### physics

a plane is flying at 250 km hr an hit a 50 km hr headwind what is its resultantt speed relative to the ground
62. ### physics

what is your final velocity after 680 meters if you start out at 90km/hr and acceleration is 9 m/s
63. ### physics

how do you find time when all you're given are two different speeds the height and the angle?
64. ### physics

if you exert a force of 500N to walk 4M up a flight of stairs in 4S , how much power do you use?
65. ### physics

find the altitude change of a 10000-kg fighter which clims and in so doing, loses 100 m/s of airspeed
66. ### physics

Calculate the speed (in m/s) of a skateboarder who accelerates from rest for 4 seconds down a ramp at an acceleration of 3 m/s2.
67. ### mathematical method of physics

expand 3sin(4x)+4cos(10x) in to functional series of e(exp)ix
68. ### physics

How much work is needed to stop a 20g bullet moving with speed of 150m/s
69. ### physics

In the figure below, qA = 6.0 µC, qB = 2.6 µC, qC = 1.3 µC, dAB = 4.00 cm, and dAC = 3.00 cm. Determine the magnitude and direction of the net force on qA
70. ### physics

What will be the magnitude of work if a force of 25N pulls a stone through distance of 5m in its direction ?
71. ### physics

A jet travels at 434 m/s. How long does it take to travel 294 m? Answer in units of s
72. ### 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.
73. ### physics

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

A boy hops on his bike and rides 135 meters in 20 seconds. What is his average speed?
75. ### physics

A boy hops on his bike and rides 135 meters in 20 seconds. What is his average speed?
76. ### physics

Find the constant acceleration of a particle whose velocity changes by 3.06 m/s every 0.093 s.
77. ### physics

a pendulum with a length of .600 m has a period of 1.55 s. what is acceleration due to gravity at the pendulums location
78. ### physics

what net force is needed to accelerate a 2.0kg mass from rest to a velocity of 10m/s in 5.0s
79. ### physics

Describe in detail an experiment to find out the half life of a radioactive material
80. ### Physics

How long does it take light traveling from the sun at 3.0 x 10^8 m/s to reach Jupiter, which is 780 x 10^6 km away?
81. ### physics

what force is necessary to stop a 20 g bullet moving at 200 m/s as it penetrates a wood at a distance of 4 m?
82. ### Physics

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

Find the maximum height reached by a ball thrown upward at a velocity of 95ft/s
84. ### Physics

How long does it take a motor cyclist to come to rest?which travels at 12m/s decelerates at 3m/s^2
85. ### physics

This isn't so much a question, but a query: What does this mean? K.E. = 1/2 mv2 I can do the homework on my own if someone lets me know. Thanks.
86. ### physics

what is the greatest acceleration can be generated by a runner if coefficient of friction between shoes and road is 0.95
87. ### physics

Calculate the watts of power expended when a force of 1.8 N moves a book 2.0 m in a time interval of 1.0 M/S
88. ### PHYSICS

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

Under what conditions would an applied force increase the Kinetic energy of an object?
90. ### physics

explain why a child on a swing comes to rest directly below the top of the swinng
91. ### Physics

If a shoe is dropped from a height of 40m, what is its speed after falling for two seconds?
92. ### Physics

Calculate the gravitational force between two identical 100-kg masses separated by 1 m.
93. ### physics

how much force can be applied to the top block without the blocks slipping apart
94. ### physics

how much force can be applied to the top block without the blocks slipping apart
95. ### physics

I am moving 3 blocks with a force of 3 newtons over a distance of 1 meter in 10 seconds. What is the power?
96. ### Physics

Using volume of a sphere, calculate the average density of Saturn (radius = 60,268 km).
97. ### physics

How far does a point on the circumference travel if the wheel is rotated through an angle of 26.2 rev?
98. ### Physics

Why do we see more mirages in southern states and in the summer than at other times or places
99. ### physics

What is the period and frequency of a 10-pound weight oscillating (as a pendulum) on a 5-meter-long rope?
100. ### Physics

Roads seldom go straight up a mountain, they wind back and forth. Explain why this is useful