# Physics!

74,459 results, page 58

1. ### Physics

Where does it takes less time to boils eggs: in a pan of boiling water or in a pressure cooker?
2. ### Physics (fix)

In a string and pulley problem, will friction increase or decrease the tension.can you please explain if you can?
3. ### physics

Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where V1 = 5.0 10-3 m3 and V2 = 20.0 10-3 m3.
4. ### Physics Classical Mechanics

Hi Enjoy, Thanks. I got the acceleration right and the Force wrong. Need help on Question 2.
5. ### Physics

Two organ pipes are imitating a sound of 12 Hz, one of them is 12 m long. What is the length of the other pipe?
6. ### Physics 221

How much charge flows through a 12 –V battery when a 2.0 mF capacitor is connected across its terminals?
7. ### physics

Under what circumstances does a double convex lens produce an image that is reversed left to right?
8. ### 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.
9. ### physics

list three factors that we must always give when exprassing a force vector quantity
10. ### physics

How much force is needed to accelerate a 125 kg block up a 35 degree include at 3.4 m/s2 if the coefficient of friction is 0.28?
11. ### physics

is this right?if 5.0m/s^2=6.0m/s-0/1.2s a=fn/m 5.0m/s=15.0N/3kg show that the 5.0m/s^2 acceleration can result from a net force of 15N exerted on a 3.ok cart
12. ### Physics

Two spheres with masses of 5.00 g and 10. kg respectively are .500 m apart. calculate the force of attraction between them.
13. ### Physics

If the period of the moon were 31 days while its orbit radius 3.8x10^8m, what would the mass of the Earth be?
14. ### PHYSICS

A girl rows 10 km downstream in 2 h. Her return trip takes 4 h. How fast can she row in still water. in km/h?
15. ### Physics

Find the uniform acceleration that causes's a car's velocity to change from 39.7 m/s to 74.0 m/s in an 5 second period of time.
16. ### Physics

A 1250 kg car travelling at 60.0 km/h comes to a sudden stop in 35 m. What is the coefficient of friction acting on the brakes?
17. ### Physics

A satellite that is 4175 miles from the center of the earth, orbits with a period of 90 minutes. What is its centripetal acceleration?
18. ### physics

If a cart is initially travelling at 3.5 m/s, and has a mass of 200g, what is it's kinetic energy (LEAVE OUT units of J)?
19. ### physics

What is the momentum of the 200 g cart BEFORE the collision (LEAVE OUT units of kgm/s)? please help.
20. ### physics

Earth is approximately a sphere of radius 6.37 × 106 m. What are (a) its circumference, (b) its surface area, and (c) its volume? please help
21. ### Physics

What capacitance in needed in series with an 785 µH inductor to form a circuit that radiates a wavelength of 199 m?
22. ### Help!! Physics

What capacitance in needed in series with an 785 µH inductor to form a circuit that radiates a wavelength of 199 m?
23. ### physics

a 1000 kg sports car accelerates from 0-30 m/s in 5.0 s. What is tge average power delivered by the automobile engine?
24. ### 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 4s
25. ### physics

Is there a way to calculate the moment of inertia of a hanging mass (3.1 kg) without length & width dimensions?
26. ### 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
27. ### Physics

An airplane is flying at an altitude of 2,000 m with a speed of 216 m/s. What is the pressure of air outside the plane?
28. ### Physics

An airplane is flying at an altitude of 2,000 m with a speed of 216 m/s. What is the pressure of air outside the plane?
29. ### Physics/ Chem

Find the entropy change when 51g of steam condenses to water at 100 ∘C.
30. ### physics

Why electric dipole moment between two charges points from negative to positive charge.
31. ### Physics

If a car engine has a power,P. Write an expression for the time it will take to accelerate from w to 4w. Note that P=wt where t is torque.
32. ### physics

if 20g of steam at 100 c is mixed into 80 g of water at 20 c what is the final temperature if no heat lost
33. ### physics

What is the total internal kinetic energy of 16.2 moles of a monatomic ideal gas at a temperature of 279 K? KE =
34. ### physics

A proton is suspended at rest in a uniform field E.Take into account gravity and determine E.
35. ### physics

what is the heat required to convert 0.1 kg of melting ice into steam at 100 degree celcius
36. ### Physics questoin

A satellite has an orbital radius of 3.74x10^7 m. If it has a period of 49776 seconds, what is the mass of the planet?
37. ### physics

two forces of magnitude 8N making an angle of 30 and 120 with +xaxis . FInd the y component of reultant
38. ### 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
39. ### Physics HELP ME PLEASE

A 1250 kg car increases it's speed from 11 m/s to 27 m/s in 5.4 s. - What is the cars acceleration? - How much force is required?
40. ### Physics

Which of the following is an appropriate measure of electric power on a toaster label? A. 110 V B. 2.0 A C. 220 W D. 55 Ω
41. ### Physics

Calculate the tension in the cable connecting the two masses. Assume all surfaces are frictionless.
42. ### PHYSICS

'if diametre of earth is reduced to half mass remains constant what is then duration of day and night'
43. ### Physics

A person with a mass of 55kg climbs a tower with a height of 11m in 25 minutes. What power is produced?
44. ### physics

Find the total displacement of a body in 8seconds starting from rest with an acceleration of 2cm/sec2
45. ### Physics

all electric field lines start on positive charges. explain why this makes sense.
46. ### physics

Why does a conductor carrying current experiences force when held in a magnetic field at right angles to it?
47. ### physics

Written in scientific notation, with three significant digits, the number 0.01050 is_______?______ x 10?
48. ### science (physics)

A projectileis given an initial velocity of icap + 2jcap . The catesian equation of its path
49. ### science (physics)

A projectileis given an initial velocity of icap + 2jcap . The catesian equation of its path
50. ### physics

An astronaut in a spaceship is listening to his music. Calculate the time it takes to play a 4.00 minute song at 0.1c
51. ### college physics

Calculate the angular speed of the moon if it makes a revolution around the earth in 27.3 days?
52. ### 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?
53. ### physics

according to the statement given what is the magnitude of the velocity of the rock just before it strikes the ground
54. ### physics

Liquids exert pressure at Right Angles to the surface of container.Please explain this with an example
55. ### 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.
56. ### 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
57. ### physics

What, roughly, is the percent uncertainty in the volume of a spherical beach ball whose radius is r = 0.84 ± 0.04m ?
58. ### physics

Calculate the distance you will travel if you maintain an average speed of 12km/h for one-half hour.
59. ### Physics

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

Show that the motion of a particle in a central force field is always confined to a plane.
61. ### physics

A current of 1 A is maintained in a simple circuit with a total resistance of 2.5 Ω. How much heat is generated in 4.0 s?
62. ### physics

The resistivity of silver is 1.59 × 10-8 Ω·m. What is the resistance of a section of 12 gauge wire (diameter 0.2057 cm) that is 8.60 m long?
63. ### physics

The resistivity of silver is 1.59 × 10-8 Ω·m. What is the resistance of a section of 12 gauge wire (diameter 0.2057 cm) that is 8.60 m long?
64. ### physics

A square conducting slab with 7 m sides carries a net charge of 89 mu or micro CC. what is the electric field?
65. ### physics

the angle between two forces of 32 AND (neutrons) and 47 N is 36 degrees. Find the magnitude of the resultant force
66. ### Physics

Find the pressure exerted by a waterbed with dimensions of 2 m x 2 m which is 30 cm thick. (hint: use density of water)
67. ### Physics

A proton with a kinetic energy of 4.7×10−16J moves perpendicular to a magnetic field of 0.25T .
68. ### physics

If one walks straight up a 10 degree incline, what is the height achieved after walking 10 kilometers ?
69. ### physics

If a 1500 kg car stopped from an in 5.6 seconds with an applied force of 5000 N, how fast was it initially traveling?
70. ### physics

Find the total force necessary to give a rocket of mass 25,000 slugs an acceleration of 28.0 ft/s2.

Calculate the allowed wavelengths for the emission of a photon initially in the n=3 state in a hydrogen atom
72. ### Physics, Help!! URGENT!!!

A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?
73. ### physics

A meteoroid is speeding through the atmosphere, traveling east at 15.5 km/s while descending at a rate of 10.6 km/s. What is its speed, in km/s?
74. ### physics

An 80 kg skateboarder going 10 m / s is launched nearly vertically off a ramp as shown. Approximately how high does he go?
75. ### physics

a fire hose held near the ground shoots water at a speed of 6.4m/s, at what angle should
76. ### Physics

Katie kicks a football at a 52 degree angle and a velocity of 31 m/s. At what times will it be 10 meters off the ground?
77. ### physics

A aluminum wire has a diameter and uniform electric field of imposed along its entire length
78. ### physics

A crate is given an initial speed of 5.0m/s up the 22.5∘ plane shown in (Figure 1) . Assume μk = 0.12.
79. ### Physics

You swing a 2.40kg stone in a circle, using the full length of a thin 60.0cm rope.
80. ### Physics

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

How fast will a roller coaster, with a mass of 1200 kg, be moving at the bottom of an 18 meter tall hill?
82. ### Physics

Explain how you would determine how much error there is between a vector addition and the real results.
83. ### Physics Science

How many kilocalories of heat are required to melt 20.0 kg of ice at 0°C? Okay so the given is m=20.0kg Ti=0°C HeatFusionIce=80 kcal/kg
84. ### physics

Find the radius of a spherical asteroid that has a density of 4600 kg/m3 and an acceleration due to gravity of 0.11 m/s2 at the surface. km
85. ### physics

How much heat (in kJ) will it take to bring 56 kg of ice at -8°C to dry steam? Answer to 3 significant figures
86. ### ap physics

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

Fall time under g is sqrt 2h/g. Can someone give a derivation from the equations of motion please? Thanks.

Which of the following is closer to a guess? hypothesis<<<<< law question theory
89. ### physics

A ball strikes against the floor and returns with double velocity.In which type of collision is it possible?
90. ### Physics

How much force is required to accelerate a 1500kg car to a speed of 17m/s in a distance of 45m? Thank you.
91. ### physics

a horse pull a barge with a force at an angle of 30¡ã to the horizontal for a distance of 20km . find the work done.
92. ### physics

An ambulance is going away from me @ 40mph with a siren @ 1000Hz.Will I heat a higher or lower frequency

the potential difference across a load is 9V. explain what this means in more fundamental terms.
94. ### Physics

A 50 cm diameter wheel rotates through 25 radians. How do I figure out the amount of distance it will move?
95. ### physics

Can the gravitational potential energy of a baseball ever be negative? Yes No Explain without using a formula.
96. ### Physics

A weight suspended from a spring is seen to bob up and down over a distance of 11 cm twice each second.
97. ### physics

An object falls a distance h from rest. If it travels 0.45h in the last 1.00 s, find the time and the height of its fall.
98. ### physics

would someone in a lift feel lighter or heavier as it accelerated upwards? explain your answer.
99. ### physics

a tsunami originating in japan has a wavelength of 10^5 m and a period of 10 mins. how long does it take to travel 8000km?
100. ### Physics

What is the maximum total force exerted on a 71 kg astronaut by her seat during the launch of the Space Shuttle?