# Math/Physics

214,834 results, page 66

1. ### Physics

Find the slope of the line that is tangent to the given function’s graph for the specified value of the independent variable. f(x) = 9x – 8; x=10.
2. ### physics

a person throws a ball upward into the air with an initial velocity of 20.0 m/s, calculate how high it goes
3. ### physics

sketch a postion time graph for a student walking east with a constant velocity how would that look
4. ### Physics

How fast must a truck travel to stay beneath an airplane that is moving 139km/hr at an angle of 25° to the ground?
5. ### Physics

If the Kitty Hawk Flyer has 12 HP how would you express this power in the SI system and report the numerical value in kilowatts?
6. ### physics

How will the weight of a 20kg object change if it was in a lift that accelerates downward at 4 meters per second squared?
7. ### physics

What is the required resistance of an immersion heater that will increase the temperature of 2.00 kg of water from 10.0°C to 50.0°C in 9.0 min while operating at 120 V?
8. ### College Physics

What will a spring scale read for the weight of a 73 kg woman in an elevator that moves upward with constant speed of 5.4 m/s?
9. ### physics

How long will it take a 230 W motor to lift a 335 kg piano to a sixth-story window 19.0 m above?

What happens when an insulator is wired in series with the bulb? Is trhe swich open or closed?
11. ### physics

Explain the interference due to thin flims and ahows that the reflected and transmitted systems are complementary to each other.

What is the current produced by a potential difference of 240 volts through a resistance of 0.2 ohms?

What voltage is necessary to produce a current of 200 amperes through a resistance of 1 x 10^-3 ohms?
14. ### physics

What is the gravitational potential energy of a 300.0 g coffee cup sitting on a table top 1.25 m above the floor?
15. ### PHYSICS Gr.11

i am completely confued :( what are balanced and unbalanced forces? How can u tell by looking at a free body diagram and/or a problem? thanks
16. ### Physics

A centrifuge has a rotational inertia of 6.0 10-3 kg · m2. How much energy must be supplied to bring it from rest to 420 rad/s?
17. ### 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?
18. ### general physics

If wind blows at 30 m/s over a house, what is the net force on the roof if its area is 300 m^2 and is flat?
19. ### physics

what would be the significance of the photoelectric effect graph if it a) passed through the origin b) had a positive y intercept
20. ### PHYSICS

TWO WEIGHTS ARE ATTACHED TO BOTH ENDS OF A WIRE AND SLIDED ON A BLOCK OF ICE.INVESTIGATE THIS PHENOMENON?
21. ### Physics

What is the frequency shift of a 79 GHz police radar signal when it reflects off a car moving at 110km/h ?
22. ### physics (electric charges)

Hi, How can you charge an electroscope negatively? Is it by using a positively charged rod? Can someone please help me? Thank you :)
23. ### physics (electric charges)

Hi, How can you charge an electroscope negatively? Is it by using a positively charged rod? Can someone please help me? Thank you :)
24. ### college physics

Estimate the rotational kinetic energy of Earth, assuming it to be a solid sphere of uniform density.
25. ### physics

how old would you be, when you returned from a trip while traveling at 99.5% C if your relatives that stayed at home, were 10 years older?
26. ### physics

An elevator weighting 2500 N ascends at a constant speed of 8 m/s. How much power must the motor supply to do this?
27. ### Physics

Describe alpha, beta, and gamma rays. What exactly is each ray composed of? What are their characteristic radiation characteristics?
28. ### physics

find the total momentum of electrons in a straight wire of lenght 1000m carrying a current of 70A.
29. ### College physics

You have a collection of six 1.0 kilo ohm resistors. what is the smallest resistance you can make by combining them
30. ### Physics

Two objects are moving in different direction. Under what circumstances can you treat this as one-dimensional problem?
31. ### Physics

How much energy is need to place four positive charges, each of magnitude +5.0 mC, at the vertices of a square of side 2.5 cm?
32. ### Physics

How much energy is need to place four positive charges, each of magnitude +5.0 mC, at the vertices of a square of side 2.5 cm?
33. ### physics

Is the acceleration due to gravity more or less atop Mt. Everest than at sea level? Defend your answer.
34. ### Physics

In a gas kept at a constant temperature, all molecules move with the same speed. True or false?
35. ### physics

a plane travels 5.0 x 10^2 while being accelerated uniformly from rest at the rate of 5.0 m/s. what final velocity does it attain?
36. ### physics

A boy sledding down a hill accelerates at 2.00 m/s2. If he started from rest, in what distance would he reach a speed of 5.20 m/s?
37. ### Physics

A golf ball is chipped at an angle of 37 degrees and with a speed of 13.5 m/s. How far does it travel to the nearest tenth of a meter?
38. ### physics

how long does it take a softball to cross homeplate at 43 feet if the ball is going 65 miles per hour?
39. ### Physics

A student travels 6.0 m [E] in 3.0 s and then 10.0 m [N] in 4.0 s. Draw a vector diagram to determine the resultant displacement. Q: How do you know where the starting point is on the graph?
40. ### physics

a pendulum of length L=9.8m hangs in equilibrium and is given velocoity v=0.2m/s at its lowest point.What is the magnitude of the subsequent oscillation?
41. ### Physics

h t t p : / / b i t . l y / 9 S F F F o a) What is the minimum value of F needed to move the two blocks? b) If the force is 10% greater than your answer for (a), what is the acceleration of each block?
42. ### Physics

h t t p : / / b i t . l y / 9 S F F F o a) What is the minimum value of F needed to move the two blocks? b) If the force is 10% greater than your answer for (a), what is the acceleration of each block?
43. ### physics

a pendulum of length L=9.8m hangs in equilibrium and is then given velocity v=0.2m/s at its lowest point.What is the magnitude of the subsequent oscillation?
44. ### physics

how long do waves of frequency 7 hz and wavelength 5cm take to travel across a pool breadth 3.5 metres
45. ### physics

An athlete executing a long jumper leaves the ground at a 27.0 degree angle and travels 7.89 m. What was the takeoff speed?
46. ### physics

what is your age in seconds? this is a conversion problem. someone help please with all the multiplication and division... very confused. THANK YOU
47. ### physics

what is the shortest possible time in which a bacterium could travel a distanceof 8.4 cm across a petri dish at a constant speed of 3.5 mm/s
48. ### physics

The pendulum swings past the pole 14 times in 21 seconds. The weight of the bob is 10g. Calculate the period?
49. ### physics

A 1600 kg car traveling at a speed of 31 m/s skids to a halt on wet concrete where uk = 0.60. how long are the skid marks?
50. ### physics

A train is traveling up a 3.6 incline at a speed of 3.30 when the last car breaks free and begins to coast without friction.
51. ### physics

How long will it take an 850 kg car with 40 hp (horsepower) to reach the speed of 15 m/2, neglecting friction? 40 hp=29840 watts I know P=W/t but what is W?
52. ### physics

If a person does 80 J of work in moving a 30 \rm{kg} box over a 13 m distance on a horizontal surface, what is the minimum force required?
53. ### Physics

a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight....the angle and normal force
54. ### Physics

a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight....the angle and normal force
55. ### Physics

a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight....the angle and normal force
56. ### Physics

is it true or false the monochromatic light has photons of different energies? PLZ DNT 4GET 2 XPLAIN IT
57. ### physics

A car traveling at 7.3 m/s accelerates 4.5 m/s2 to reach a speed of 11.0 m/s. How long does it take for this acceleration to occur? Answer in units of s.
58. ### Physics

A child slides down a hill on a toboggan with an acceleration of 1.5 m/s squared. If she starts at rest, how far has she traveled in 1.0 s, 2.0 s, and 3.0 s?
59. ### physics

A longjumper running at 12 m/s and jumps at 20 degrees. No wind or resistance but gravity is normal -9.81 m/s2. How far will person jump?
60. ### Physics

A soccer player launches a ball at an angle of 40 degrees, with an initial velocity of 23 m/s. What are the horizantal and vertical for this problem??
61. ### physics

A 4600 kg helicopter accelerates upward at 2.26 m/s2. 2 The acceleration of gravity is 9.8 m/s . What lift force is exerted by the air on the propellers?
62. ### physics

A 4600 kg helicopter accelerates upward at 2.26 m/s2. 2 The acceleration of gravity is 9.8 m/s . What lift force is exerted by the air on the propellers?
63. ### physics

A large boulder is ejected vertically upward from a volcano with an initial speed of 41.0 . Air resistance may be ignored.
64. ### physics

A boy sledding down a hill accelerates at 1.30 m/s2. If he started from rest, in what distance would he reach a speed of 8.00 m/s?
65. ### physics

A satellite orbits at an average altitude of h = 409 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 10^24 kg
66. ### physics

What minimum speed does a 150 g puck need to make it to the top of a 5.90 m-long, 21.0 degree frictionless ramp?
67. ### Physics

If 500 grams of a metal requires 70 calories of energy to raise its temperature by 10 Kelvin, what is its specific heat?
68. ### Physics

Calculate the earth's orbital angular speed in radians/sec due to its motion around th sun.
69. ### physics

Find the angular speed of the Earth as it spins about its axis. Give your result in rad/ses
70. ### Physics

Is momentum conserved when a cannon is rigidly mounted to the deck of a large boat and subsequently fired. What will happen and why?
71. ### Physics

A car traveling initially at 7.49 m/s acceler- ates at the rate of 0.743 m/s2 for 5.41 s. What is its velocity at the end of the accel- eration?
72. ### physics

A person has a mass of 50.0 kg. What is the pressure they exert on the blades of their ice skates if each skate blade is 15.0 cm long and 5.00 mm wide?
73. ### physics

You should expect concrete to have an elastic constant that is _____ than wood. a. larger than b. smaller than c. equal to
74. ### Physics

Does an object moving in a circle obey the law of inertia? Which way would it move if there were no net force on it?
75. ### physics

A truck increases its speed from 8 m/s to 28 m/s over a distance of 120 m? How long does this take? Assume that the acceleration is constant
76. ### Physics

Use the Second law of thermodynamics to explain why an ice cube cools off your warm soda.
77. ### PHYSICS

What is the reaction effect of the following action effects? a) Earth orbits the sun b) Ball accelerates downward Thank YOu.
78. ### PHYSICS

What is the reaction effect of the following action effects? a) Earth orbits the sun b) Ball accelerates downward Thank YOu.
79. ### Physics

What is the gravitational force between the proton (1.67X10^-27 kg) and the electron (9.11X 10^-31 kg) in a hydrogen atom if they are 3.00X10^-10 m apart?
80. ### Physics

i have to build a enery effiecient vehicle for class and do a opapp paper and i need help im so confused.... any ideas?
81. ### physics

A bird is flying from the ground to the top of a tree at 5 m/s at an angle of 24 degrees. What are the horizontal and vertical components of this velocity?
82. ### physics

What is the longest wavelength for standing sound waves in a 102.0 cm long tube that is open at both ends?
83. ### Physics: Waves in Media

By how many decibels does the sound intensity from a point source decrease if you increase the distance to it by a factor 6?
84. ### physics

The displacement from the equilibrium caused by a wave on a string is given by: y(x, t) = (-0.00200 m) sin [40 m-1)x – (800 s-1)t]. What are the number of waves in 1 m
85. ### physics

The pulley in Figure P8.59 has a moment of inertia of 7.0 kg·m2 and a radius of 0.50 m. The cord supporting the masses m1 and m2 does not slip, and the axle is frictionless.
86. ### physics

as an object is dropped from a high cliff, which of the following statistics can be made in regard to the objects potential energy?
87. ### Physics

The frequency of an electon orbiting a nyclear is 1000000000 cps and the radius is 5 * 10 to the -12m. Find the velocity of the electron.
88. ### Physics

Could a simple machine such as a lever, a pulley system or a hydraulic jack be considered a heat engine?
89. ### physics 11

a small 900kg sports car can deliver 100Hp to the pavement. how quickly can it reach 30m/s from rest?
90. ### Physics Honnors

A 15 kg block of wood is sitting on a 1.5 meter high shelf. Calculate its gravitational potential energy
91. ### Physics

A block weighing 9.7 N requires a force of 2.6 N to push it along at constant velocity. What is the coefficient of friction for the surface?
92. ### Physics

An unbalanced forced of 2.5x10^3N is applied to an object with a weight of 3.0x10^3N on a frictionless surface. What is the objects acceleration?
93. ### Physics

An object is dropped from rest. What is its instantaneous speed when it has been in motion for 5 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m/s
94. ### physics

What is the net force on a Mercedes convertible traveling along a straight road at a steady speed of 100km/h?
95. ### physics

What is the force required to move a 22kg ccrate up an incline of 35 degrees, if the coefficient between the two surfaces is .30?
96. ### physics

A block weighing 6.8 N requires a force of 2.9 N to push it along at constant velocity. What is the coefficient of friction for the surface?
97. ### Physics

What is gravitational force of a 65kg person that is on the surface of the moon has a mass of 7.348 x 10^22kg and radius of 1731km?
98. ### physics

the mathematical form of the thin-lens equation predicts that a graph of 1/p vs 1/q should have a slope of -1, explain?
99. ### physics

a 5kg suitcase slides 2m down a frictionless ramp incline at 45 degress. How fast is it going at the bottom?
100. ### physics

The boats have a mass of 30 kg. The stopping splash lasted about 1.5 s. What acceleration is required to stop the flume?