Math/Physics

215,206 results, page 67

1. Physics

A long jumper leaves the ground at an angle of 24.3◦ to the horizontal and at a speed of 10.6 m/s. How far does he jump?

Could someone remind me how to calculate this on the TI-84 Calculator: Which buttons do I hit for this: 3 * 10^8/5.4 * 10^14 I'm inputting it and coming up with 5.55 E 21 It should come out to be 5.55 *10^-7 but I'm not doing the input correct Please help
3. Physics

A Brass rod 50.0 cm long expands 0.0734 cm when heated. Find the temperature change.
4. Physics

find the altitude change of a 10,000 kg fighter which climbs and in doing so loses 100 m/s of airspeed

6. physics

Find the acceleration of the two blocks sliding down the incline in the figure below. (Take m1 = 1.1 kg and m2 = 1.8 kg. Indicate the direction with the sign of your answer
7. 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%?
8. physics

a body is moving with uniform acceleration of 10m/s2.if it starts from rest calculate its displacement after 5s
9. physics

five joules of work are needed to shift .5 c of charge from one place to another. the potential differences between the places is
10. Physics

What hanging mass will stretch a 1.9-m-long, 0.54mm - diameter steel wire by 1.2mm ?
11. PREAP Physics

From what height would a compact car have to be dropped to have the same kinetic energy that it has when being driven at 100 km/hr?
12. physics

If an armadillo can leap to 0.5m height, how fast must he be moving vertically when his feet just lift off the pavement?
13. Physics

A student photographs a 18cm flower so it fills half of a 24mm slide. What is the magnification?
14. 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
15. physics

State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS
16. Physics

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

calculate the work done on n mole of a vander waal gas is an isothermal expansion from volume vi to vf.
18. college physics

a bus that is traveling at 30.0km/h speeds up at a constant rate of 3.5m/s2. what velocity does it reach 6.8s later?
19. physics

An airplane lands and starts down the runway at a southwest velocity of 48 m/s. What constant acceleration allows it to come to a stop in 1.5 km?
20. physics

List four effects that can be observed that demonstrate light travels in straight lines. Does anybody know the answer??
21. 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.
22. physics

A yo-yo of radius 10 cm and mass 1 kg is dropped from rest. What is the instantaneous torque on the yo-yo if I hold the string with my fingers?
23. physics

what is the acceleration due to gravity at a distance of 2 earth radii abouve earths surface?
24. Physics

You throw a ball downward from a window at a speed of 2.7 m/s. How fast will it be moving when it hits the sidewalk 2.9 m below?
25. 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?
26. physics

What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is .90
27. Physics

A 27.59 kg child is on a swing that hangs from 2.26-m-long chains. What is her maximum speed if she swings out a 48° angle?
28. 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?
29. physics

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

What should be the minimum initial velocity with which a missile has to be launched so that it reaches a target of 1000km away in the same plane
31. Physics

A boy sledding down a hill accelerates at 1.65 m/s2. If he started from rest, in what distance would he reach a speed of 7.30 m/s?
32. physics

What frequency would you need to produce a sound wave in room-temperature air with a wavelength of 9 m? the answer in Hz
33. Physics

Determine Centripetal Acceleration acting on the person standing at the equator? (the radius of earth is given)
34. physics

For which of these will the buoyant force be the same as its weight when placed in water? A) A match stick.B) All of these.C) A small rock.D) None of these.E) A nail.
35. physics

a body is moving with uniform acceleration of 10m/s2.if it starts from rest calculate its displacement after 5s
36. physics

Show that the acceleration is 7.5 m/s2 for a ball that starts from rest and rolls down a ramp and gains a speed of 30 m/s in 4 s
37. physics

a 747 airliner reaches its takeoff speed of 170 in 35.0 .what is the magnitude of its average acceleration
38. physics

two equal vectors of magnitude 2A are inclime perpendicular to each other find the resultant and direction of vector.
39. physcal science/physics

what is the kinetic energy in joules of a 1000 kg car travelling at 90km/h
40. Physics

You throw a ball downward from a window at a speed of 1.8 m/s. How fast will it be moving when it hits the sidewalk 2.8 m below?
41. physics

What happens to a path of a light ray parallel to the principal axis, after it passes through a converging lens?
42. physics

Forces of 4.57 N and 4.74 N act at right angles on a reddish-green block of mass 5.76 kg. How much acceleration occurs?
43. Physics

What is the gravitational force between a proton and an electron in a hydrogen atom if they are separated by distance of 5.29x10^-9 cm.
44. Physics

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

find the force of a toy jeep if the mass is 50kg and is traveling at 4 m/s and the radius is 50 centimeter
46. PHYSICS

Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.
47. Physics

A car accelerates uniformly from rest at 3m/s(square).What is its velocity after travelling a distance of 24m?
48. physics

A rock is dropped from a height of 2 meters into a freshwater pond. What is the medium of the wave created?
49. Physics.

when an e- and a positron collide they're annihlated and their mass converts to engery. the energy released is? [1.64x10^-13 J]
50. conceptional physics

If a 35cm radius tire spins at a rate of 72 rad/s what is the rotating speed?
51. physics

What is the radius of an automobile tire that makes a complete turn in 0.1 sec and has a linear speed of 24.0 m/s?
52. Physics

State the reason why a steel sphere resting on a horizontal surface is said to be in neutral equilibrium.
53. physics

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

The grid in a high-vacuume triode is usually kept negatively charged with respect to the cathode so that the electrons may be
55. PHYSICS

a constant force of 6.00N acts on a 3.00kg object for 10.0s. what are the changes in the objects momentum and velocity?
56. Physics

You can run 8.0 m/s , 20% faster than your brother. How much head start should you give him in order to have a tie race over 90 m ?
57. Physics

If a force of 15.0 N directed east acts on a stationary 5.00 kg mass, what are its acceleration, displacement, and velocity after 10.0 s?
58. Physics

What is the de Brogile wavelength of an electon that strikes the back of the face of a TV screen at 1/10 the speed of light?
59. PHYSICS

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

Two ants race across a table 65 cm long. One travels at 5.76 cm/s and the other at 3.99999 cm/s. When the first one crosses the finish line, how far behind is the second one?
61. physics

A mass of 1kg is placed at 1m,2m,0.Another mere of 2kg is placed at 3m,4m,0.Find moment of inertia of both the ladder about z-axis
62. physics

the period of revolution of a satellite is 90 min. Find the radius of the orbit assuming an acceleration of 9.8 m/s/s.
63. Physics

What is the frequency of an EM wave emitted most strongly by a glowing element on a stove with temperature 1500 K?
64. physics

Why does the pitch of the sound produce by blowing over an open end of a bottle change when you have more water in it?
65. Basic Physics

If a swimming pool has dimensions; 28.2 5m x 10.0m x 2.30m, when it is full of water, what is the force on the bottom ?
66. physics

find the revolutions of a bicycle wheel of diameter 0.8m when the bike goes a distance of 25m down the street.
67. physics

A boy sledding down a hill accelerates at 1.20 m/s2. If he started from rest, in what distance would he reach a speed of 7.00 m/s?
68. physics

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

A motorcyclist increases her speed along a straight road from 0 to 120 km/hr in 5 seconds. How much acceleration does she experience
70. physics

Suppore the ceiling in the previous problem is that of an elevator which is going up with an acceleration of 2.0 m/s square. Find the elongations.
71. Physics

Two spherical objects with a mass of 7.60 kg each are placed at a distance of 2.93 m apart. How many electrons need to leave each object so that the net force between them becomes zero?
72. Physics

To what potential a sphere of radius 10cm be charged so that the surface density of charge is equal to 1
73. physics

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

a boat sails 150km N60°E, then 100km West. What is it's displacement from its starting point?
75. physics

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

Calculate the force of gravity on a spacecraft 12800 km above the earth's surface if its mass is 700 kg.
77. Physics

A football is kicked at 15 m/s with an angle of 35 degrees with the ground. How long is it in the air? How far will it land? Can someone help plz... Thanks!
78. physics question

find the force exerted by proton and the electron in a hydrogen atom they are 5.0 X 10^-19 coulomb
79. Physics

Calculate the energy evolved when 8 droplets of water of radius 1/2mm each combine into one where s=0.072N/m.
80. ap physics

a 37.4-kg traffic light is supported by two wires prove you answer applying newtons law
81. physics

A stone is thrown straight up. To reach a height of 6.74 m above its release point, what must its initial speed be in m/s
82. Physics

is it right that ideal gas only obey the boyles law under high temp and low pressure?
83. Physics

How does the idea of magnetic fields arising from circulating currents relate to permanent magnets?
84. Physics

If a force of 15.0 N directed east acts on a stationary 5.00 kg mass, what are its acceleration, displacement, and velocity after 10.0 s?
85. physics

How can you easily increase the magnetic field strength inside a current-carrying coil?
86. Physics

Find the electric potential at the centre of the square of side 1m at the four corners of charges of q1, q2,q3,and q4 are placed having values 3×10^-8C,-3×10^-8C,-5×10^-8C and 6×10^-8C respectively.
87. physics

a 200kg body raised to a height of 10m. what is the gravitational potential energy of the system?
88. Physics

Initial velocity is 21 m/s, the angle is 40 degrees, 20 meters away from the wall. How long is the ball in the air for?
89. physics

at highway speeds, a particular automobile is capable of an acceleration of about 2.6 m/s^2. at this rate, how long does it take to accelerate from 60 km/h to 110 km/h?
90. Physics

What is the final velocity of a hoop that rolls without slipping down a 5.00-m-high hill, starting from rest?
91. Physics

On a bright sunny day, the irradiance on the surface of the ocean is 1.6*10^17 photons cm^-2 s^-1. If k=0.02 m^-1 a)How much light is left at 15 m? b)at 75 m?
92. Physics

a truck is traveling in a straight line goes 60km in 83minutes. what is its average speed in km per hour?
93. PHYSICS

two forces of magnitude 8N making an angle of 30 and 120 with xaxis . the y component of resultant A/ O B/ 4N C/ 8N D/ 16N
94. Physics

How much work is done by a girl weighing 450N while carrying a 2kg package up a 2m flight of stairs?
95. Physics

What is the gravitational force between a proton and an electron in a hydrogen atom if they are separated by a distance of 5.29x10^-9 cm
96. Physics

1. Could a horizontal axis of rotation be used satisfactorily in an experiment uniform circular motion? Explain
97. physics

If you dropped the ball, cylinder and the ring at the same time from a height of 6.35 cm, in what order would the hit the ground?
98. Physics

Two objects of masses m1 and m2 fall from the height respectively. The ratio of the magnitude of their momenta when they hit the ground?
99. Physics

Let F1=10i-15j-20k,F2=6i+8j-12k. Find their dot product and the angle between those two vectors
100. Physics

a bb gun has a muzzle velocity of 325 ft/sec. How long will it take the bb to hit the ground? How far will the bb travel?