# Physics!

74,730 results, page 59
1. ## 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?
2. ## physics

A car travels in a straight line for 4.8 h at a constant speed of 57 km/h . What is its acceleration? Answer in units of m/s
3. ## 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.
4. ## 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?
5. ## physics

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

If a DeLorean rolls gently (vo = 0) off a vertical cliff, how long does it take it to reach a downward velocity of 78 km/h?
7. ## physics

show the expression v=at is dimensionally correct where v represents speed an acceleration and t is instant time?
8. ## 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?
9. ## 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
10. ## Quantum Physics

An electron drop to what energy level is likely to emit a photon in the infrared region?
11. ## physics

The position of a particle moving along the x axis is given by x = (21 + 22t − 6t^2)m, where t is in s. What is the average velocity during the time interval t = 1s to t = 3s?
12. ## Physics

A car travels in a straight line for 4 h at a constant speed of 63 km/h. What is its acceleration? Answer in units of m/s^2?
13. ## 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 ?
14. ## Physics

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

a 50 gram object is accelerating at a rate of 5 m/s2. calculate the force needed to produce this acceleration
16. ## 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?
17. ## physics

Two uniform spheres , each of mass M and radius R, touch one another. What is the magnitude of their gravitational force of attraction?
18. ## 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
19. ## 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
20. ## physics

Figure 18-23 shows three linear temperature scales, with the freezing and boiling points of water indicated.
21. ## Physics

Wat direction will the Electric Field Lines be in a parallel plate capacitor containing a dielectric ?
22. ## 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
23. ## Physics

How long will it take a 1830 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above?
24. ## physics

(a) What is the torque about the origin on a jar of jalapeno peppers located at coordinates (1.0 m, -4.0 m, 2.0 m) due to force F1 = (-3.0 N) + (2.0 N) + (-5.0 N) ?
25. ## Physics

Two equal points charges of +3.00 X 10-6C are placed 0.200m apart. What are the magnitude and direction of the force each charge exerts on the other?
26. ## 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?
27. ## Physics

How do you know when to use cos or sin or tan when they give you angles in the question to find tension or force?
28. ## physics

A roller coaster travels 101 ft at an angle of 45.7 ◦ above the horizontal. How far does it move horizontally
29. ## Physics

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

A record has an angular speed of 47 rev/min. Through what angle does it rotate in 1.07 s? Answer in units of ra
31. ## physics

Resultant displacement from 12m east to5m north to9m vertically upward
32. ## physics

According to Newton's version of Kepler's third law, how would the ratio T^2/r^3 change if the mass of the Sun were doubled?
33. ## physics

If a DeLorean rolls gently (vo = 0) off a vertical cliff, how long does it take it to reach a downward velocity of 78 km/h?
34. ## physics

Correct the following statement: The racing car rounds the turn at a constant velocity of 145 km/hr.
35. ## 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
36. ## Physics

What is the longest wavelength of light that can be absorbed by a hydrogen atom that is initially in the second excited state?
37. ## Physics

At the end of a race a runner decelerates from a velocity of 7.00 m/s at a rate of 0.500 m/s2. (a) How far does she travel in the next 14.0 s in meters?
38. ## 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?
39. ## physics

a cyclist does work at the rate of 500w while riding. how much force does her foot push with, when she is traveling at 8.0 m/s?
40. ## Physics

A solid weigh 45N and 15N respectively in air and water. Calculate the relative density
41. ## AP Physics

What is the potential energy of an electron and proton in a hydrogen atom if the distance between them is 5.3*10^-11? ANSWER k=9*10^9 Q=1.6*10^-19 q=1.6*10^19 Ue=? Ue=KQq/r Ue=-4.4*10^-18 j
42. ## Physics

what is the mass of hydrogen peroixide, H2O2, in 350 grams ofa 20% by weight solution?
43. ## physics/electrical circuits

if there are eleven resistors of 33k ohms each in parallel, what is the total resistance?
44. ## physicS

What is the longest wavelength for standing waves on a 238.0 cm long string that is fixed at both ends?
45. ## Physics

An object with a mass of 3kg is dropped from 56.3 meters. How far above the ground is it's kinetic energy 1073J?
46. ## PHYSICS

The force applied by the e-brake is F(eb) = m*a(eb) = -8.13*1452 = -12,100 N I didn't get the same answer - I got 11,804.76....please check
47. ## physics

A 15 kg box slides across the floor with an initial velocity of +7.6 m/s. It comes to a stop after sliding +14.8 m. How much friction was present?
48. ## Physics

When you swim across a river does the time it takes to get to the other side depend on the rate of flow of the water?
49. ## physics

calculate the linear momentum of a truck with a mass of 13065kg that is traveling at 36m/s eastward.
50. ## physics

a particle starts moving from rest with uniform acceleration . it travels a distance y in the next 2 sec
51. ## physics

Calculate the speed of an 7.6×104 kg airliner with a kinetic energy of 1.2 × 109 J. Answer in units of m/s
52. ## physics

A 50kg person standing on both feet cover a surface about 13 cm x 12 cm. How much pressure is on the sole of their shoes?
53. ## Health Physics

As one exhales, what change in energy takes place between the diaphragm and the air in the lungs?
54. ## physics

What is the longest wavelength for standing waves on a 238.0 cm long string that is fixed at both ends?
55. ## 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?
56. ## Physics

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

A mass of gas has a volume of 380 cm3 at a pressure of 560 mm Hg and a temperature of 7C. What is its bolume at s.t.p.?
58. ## 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?
59. ## Science: physics

Why does the moon not require a push to keep it along its orbit around the earth? -I have to use Newton's first law of motion.
60. ## 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?
61. ## physics/math

If you are driving 116 km/h along a straight road and you look to the side for 3.0 s, how far do you travel during this inattentive period?
62. ## 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?
63. ## Physics

A guitar string has a mass of 30g and length of 2m. Find the tension if its density is 0.2kg/m^3
64. ## 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
65. ## 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?
66. ## Physics

How much force is required to accelerate a 1500kg car to a speed of 17m/s in a distance of 45m? Thank you.
67. ## 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.
68. ## Health Physics

As one exhales, what change in energy takes place between the diaphragm and the air in the lungs?
69. ## physics

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

A stone is dropped into a bore well 490m deep.after how time,the sound of splash of will be heard
71. ## Physics

A stone is dropped into a bore well 490m deep.after how time,the sound of splash of will be heard
72. ## physics

Calculate the force of gravity on a spacecraft 12800 km above the earth's surface if its mass is 700 kg.
73. ## 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%?
74. ## Physics

How much momentum does a .01 kg ping pong ball have if it is traveling at 25 miles/hour? (1.609km=1 mile)
75. ## Physics

How much momentum does a .01 kg ping pong ball have if it is traveling at 25 miles/hour? (1.609km=1 mile)
76. ## Physics

With the energy needed to warm up some amount of water from 40C to 64C, how high could you lift it?
77. ## Physics

A dragster's top acceleration is 60m/s^2. If it accelerates for 3 seconds from the starting line, how fast will it be going?
78. ## physics

Calculate the time elapsed if the speed of a truck going south is reduced from 80 km/h to 44 km/h in a distance of 250 m.
79. ## 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?
80. ## 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?
81. ## physics

How high will an object rise if it is projected upward at a 45 degree angle and an initial velocity of 50 m/s?
82. ## physics

A uniformly accelerated particle covers three successive equal distances in time intervals t1, t2 and t3 respectively.
83. ## physics

2. A hockey player is skating in a straight line at 1.5 m/s. He then increases his speed to 7 m/s in 3 s. What is his average acceleration during this 3 s?
84. ## Physics

How long does it take T-Rex to reach its food 200m away assuming that he starts from rest and accelerates at 4.00 m/s2?
85. ## physics-non calc

a hammer was released from rest vi=0m/s taking 1.12 seconds to fall 1 meter. How do you solve that
86. ## physics

4. What force is needed to push a 15 N object up a 20° incline at constant speed when the coefficient of friction is 0.30
87. ## physics

find the change n momentum of a 1120-kg car that increases its speed / what minimum force is need to do this?
88. ## Physics

A 1200 kg sports car accelerates from 0m/s to 27m/s in 10s. What is the average power of the engine?
89. ## physics

a block of wood of 200g is thrown vetically with a veloncity of 20mls what is the pontential energy?
90. ## Physics

A motor cyclist travelling at 12m/s decelerate at 3m/s(squared)? How far does he travel while coming to rest?
91. ## Physics

Consider a pair of planets for which the distance between them decreases by a factor of 5. Demonstrate that the force between them becomes 25 times greater
92. ## College Physics

How much would you have to raise the temperature of a copper wire (originally at 20 ∘ C) to increase its resistance by 30% ?
93. ## physics

a 747 airliner reaches its takeoff speed of 170 in 35.0 .what is the magnitude of its average acceleration
94. ## Physics

I am curious how the earth work as an omnipresent conductive surface in an electrical distribution system?
95. ## 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?

97. ## Physics

How much potential energy is required to lift a 50 gram arrow to a height of 100 meters?
98. ## physics

How high will an object rise if it is projected upward at a 45 degree angle and an initial velocity of 50 m/s?
99. ## physics

two equal vectors of magnitude 2A are inclime perpendicular to each other find the resultant and direction of vector.
100. ## physics

A uniformly accelerated particle covers three successive equal distances in time intervals t1, t2 and t3 respectively.