74,672 results, page 65

What force is needed to accelerate a 10 kilogram shopping cart 3 m/s^2 (squared)?
2. ### physics

Mechanical energy is the difference between the kinetic and potential energies of an object true or false?
3. ### Physics

A person is travelling 6 km (E) then 4 km (N) and finally 2 km (W). Calculate the average speed And velocity. Show your work
4. ### physics

what is the formula to calculate the following: how much force is needed to move a 10 pound block 10 feet in 8 seconds>
5. ### physics

a student does 314 J of work in moving a desk 2.1 m. What was the magnitude of the applied horizontal force?
6. ### 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
7. ### physics

How much charge passes through a cross-sectional area of a copper wire in 0.8 s if I = 3.5 A? 1 C -Work equation?
8. ### Physics

a woman on a bridge 75 high sees a raft floating at a constant speed on the river below.
9. ### 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
10. ### Physics

A bowling bowl has a mass of 25 KG. What is the acceleration of the ball if an upward force of 110 N is applied?
11. ### Physics

Find the magnitude and direction of the equilibrant force for these two concurrent forces: 13.5 N, E and 32.0 N, N. Pls HELP me answer this. Thank u very much.
12. ### physics

Which of the following physical properties can be used to measure temperature using a thermometer? A)volume B)pressure C)density D)viscosity I got A
13. ### ap physics

How fast would a 1200 kg car travel if it had the same linear momentum as a 1500 kg truck traveling at 90 km/h?
14. ### Physics

I am curious how the earth work as an omnipresent conductive surface in an electrical distribution system?
15. ### physics

Mechanical energy is the difference between the kinetic and potential energies of an object true or false?
16. ### physics

the making of polymers is an example of the category of work done by chemists caledd _______ fill in the answeerrr
17. ### 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?
18. ### Honors Physics

Give some examples of applications that have resulted from work done by physicists on the exploration of space.
19. ### Physics

A solid weigh 45N and 15N respectively in air and water. Calculate the relative density
20. ### 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?
21. ### physics

A cylindrical container 1.7 tall contains mercury to a certain depth, . The rest of the cylinder is filled with water
22. ### Physics

A 1300 sports car accelerates from rest to 90 in 6.5 . What is the average power delivered by the engine?
23. ### physics

During a hard sneeze, your eyes might shut for 0.43 s. If you are driving a car at 125 km/h, how far does it move during that time?
24. ### physics

How long will it take a 1030 W motor to lift a 330 kg piano to a sixth-story window 13.0 m above?
25. ### physics

A car is traveling at 33.0 m/s  when the driver uses the brakes to slow down to 29.0 m/s in 2.50 seconds.   How many meters will it travel during that time
26. ### Physics check

Atoms whose nuclei have the same number of protons but different numbers of neutrons are called.... isotopes?
27. ### Physics

How much potential energy does Tim, with mass 60.0 kg, gain when he climbs a gymnasium rope a distance of 3.5m?
28. ### Physics

What is the time it takes a mosquito to flap its wings once if the frequency of their wing beats is 440Hz?
29. ### physics

a projectile launched speed of 31.1m/s at angle 71.2 degrees above horizontal fill in table time 0 vx m/s 10.0m/s vy 29.4m/s ax? ay?
30. ### Physics

A 70 g ball moves 45m/s. If its speed is measured to an accuracy of 0.10% what is the minimum uncertainty in its position?
31. ### physics

A cara accelerates uniformly from rest to a speed of 21.9 km/h in 8.5 s. Find the distance it travels during this time.
32. ### physics

A cars starts from rest and after 20 seconds its velocity becomes 108 km-1 find the acceleration of the car
33. ### physics

How much centripetal force is needed to keep a 0.20 kg ball on a 1.50 m string moving in a circular path with a speed of 3.0 m/s?
34. ### physics

How much centripetal force is needed to keep a 0.20 kg ball on a 1.50 m string moving in a circular path with a speed of 3.0 m/s?
35. ### 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.
36. ### Physics

I think it is D) but I'm not quite sure. Thanks in advance! Right after the ball is thrown at angle of 45 deg, the acceleration is a)g b)sin(45) * g c)cos(45) * g d)tan(45) * g
37. ### 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
38. ### Physics

A 3.0 cmm high object is placed 10 cm from a concave mirror whose radius of curvature is 10 cm. Where is the image located?
39. ### 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
40. ### PHYSICS

a 3000 N car is moving at 12.0m/s comes to a stop while skidding a distance of 25.0m. what is the coefficient of kinetic friction?
41. ### Physics

Two positive charges of 0.2microC and 0.01 microC are placed 10cm apart. Calculate the work done in reducing their distance to 5 cm
42. ### physics

Write the equation for fill factor in terms of V_max, V_oc, J_max, and J_sc. FF =
43. ### 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
44. ### physics

if some of water in calorimeter splash out when tranfering the metal block, will it affect the experiment result?
45. ### physics

how much time does it take for a student running t an average speed or 5.00m/s to cover a distance of 2.00km?
46. ### mathematical method of physics

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

Explain atomic line spectra in terms of transitions between discrete energy levels.
48. ### Physics

a rubber ball is thrown downwards off a balcony. after it travels 55m it has a speed of 46.5m/s. what is the initial velocity

a rubber ball is thrown downwards off a balcony. after it travels 55m it has a speed of 46.5m/s. what is the initial velocity
50. ### physics/science

i don't understand why radioactive waste is stored underground is it because it is a harmful substance
51. ### 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
52. ### AP Physics

What minimum speed does a 130 g puck need to make it to the top of a 3.8 m -long, 23 ∘ frictionless ramp?
53. ### physics

Forces of 9.93 N and 1.23 N act at right angles on a reddish-green block of mass 3.02 kg. How much acceleration occurs?

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
55. ### physics

a guy throws a ball up and catches it 3.5 seconds later. what is the max height and initial velocity. Please help!
56. ### Physics

A boy sledding down a hill accelerates at 1.70 m/s2. If he started from rest, in what distance would he reach a speed of 7.40 m/s?
57. ### Physics

How much time is needed to produce 840 joules of work if 100 watts of power is used?
58. ### Physics

A boy sledding down a hill accelerates at 1.70 m/s2. If he started from rest, in what distance would he reach a speed of 7.40 m/s?
59. ### PHYSICS!

Find the gauge pressure in pascals in a soap bubble 0.04 m in diameter. The surface tension is 25.0 x 10^4 Pa.
60. ### Physics

A 100-n boulder is sitting on a shelf 0.5 meters above the floor. What is the potential energy when its in its new location?
61. ### Physics

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

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

An elevator is moving upward at 0.93 m/s when it experiences an acceleration 0.29 m/s2 downward, over a distance of 0.67 m. What will its final velocity be?
64. ### Physics

calculate pressure in each foot?elephant 3200kg covers in each its feet an area equal 0.08(ms)
65. ### Physics

A yo-yo has a string length of 0.200 m What is the slowest speed at which you can spin it to keep it in a fixed path? What is this, and how do you find it? Thanks
66. ### physics

if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace?
67. ### Physics

State the physical quantities one has to measure in order to determine the young's modulus of a wire?
68. ### Physics

A 2473 kg elephant is walking at 3 m/s on a flat surface. How much kinetic energy does he have? Answer in Joules or J
69. ### Physics

Two identical gliders slide toward each other on an air track. One moves at 2 m/s and the other at 1 m/s. If they stick together, the combination slides at? Why?
70. ### physics

Determine the cubical expansion of a liquid of volume 20liters at 30Â°c and 20.35 liters at 100Â°c
71. ### PHYSICS

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

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

A stone is thrown straight up. To reach a height of 6.49 m above its release point, what must its initial speed be in m/s?
74. ### physics

Explain why helicopters need 2 rotors to fly in a straight line. Talking about centripetal force.
75. ### physics

A particle is projected with a speed of 39.2m/sec at an elevation of 30degrees.find its greatest height.
76. ### physics

Doubling the frequency of a wave source doubles the speed of the waves. ( True or False)
77. ### physics

List four effects that can be observed that demonstrate light travels in straight lines. Does anybody know the answer??
78. ### Physics

A 4610 kg helicopter accelerated upwards at 2 m/s^2. What lift force is exerted by the air on the propellers?
79. ### 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
80. ### physics

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

What is the relationship between me pushing my daughter my on a swing and colored light shining on the cones in my eyes?
82. ### physics

Discuss what happens when a man fires a pistol in front of a flight of stairs in a large hall.
83. ### Physics

What will a spring scale read for the weight of a 75 kg woman in an elevator that moves upward with acceleration 0.30 g? w=?
84. ### physics

if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace?
85. ### Physics

What is the number of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to 1.00×104 Hz?
86. ### Physics

If the fundamental frequency of an 70 cm long guitar string is 470 Hz, what is the speed of the traveling waves?
87. ### physics

D=m/V=m/ð•R^2•h Find the density of a 4.2- kg solid cylinder that is 13 cm tall with a radius of 5.0 cm. I am lost on the numbers to plug into this one please help
88. ### physics

A 2.8 kg air mattress is 2 m long, .5 m wide, & .1 m thick. What mass can it support in water before sinking?
89. ### Physics II

find the pressure at the bottom of a vessel 76cm deep when filled with a) water b)mercury (sp.g. 13.6)
90. ### Physics

Q1. What is the working principle of the loudspeaker. Q2.Explain the following:- 1.Beat 2.Shock wave 3.Mach effect.
91. ### Physics

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

A 2473 kg elephant is walking at 3 m/s on a flat surface. How much kinetic energy does he have? Answer in Joules
93. ### physics

A commuter backs her car out of her garage with an acceleration of 1.6 m/s2. How long does it take her to reach a speed of 2.3 m/s in seconds
94. ### physics

At what rate is a 60.0-kg boy using energy when he sprints up a flight of stairs 10.0 m high in 8.00 s? A. 75.0 W B. 48.0 W C. 735 W D. 480 W E. 4.80 kW
95. ### Physics

What is the speed of a hockey puck of mass 0.15 kg if it experiences a force 60 in N for the extent of a slap shot of 0.25 m?
96. ### Physics

When light passes from one medium to another then which of the following parameters may change? Velocity, frequency, colour or wavelenght?
97. ### Physics

A stone is thrown vertically upward with a speed of 19.0m/s How fast is it moving when it reaches a height of 10.0m
98. ### Physics

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

how can we collect sound energy from outside? then it can be converted into electricity with the help of transducer. Have to prepare a model on this. Please earlier.
100. ### Physics

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