# Physics!

74,459 results, page 41

1. ### physics

a ball is dropped from the top of a 5m tall building. what is the velocity when it hits the ground?
2. ### Physics?

the total mass-energy of one pound of anything is about how many joules
3. ### Physics

If the specific volume of red brass is 0.001865 ft/3lb. What would be the density? Thanks!
4. ### physics

what is the strength of the electric field at (x,y)=(3.0m, 3.0m)? where v=(120x^2-290y^2)V, where x and y are in meters. Please explain. thanks
5. ### Physics

Calculate the average speed of the car in km/h, it can accelerate from 96.56 km/hr in 4.3 seconds. Distance is not provided
6. ### Physics

How much impulse is given to a 25 kg train car that is accelerated from rest to 12 m/s in 4 sec?
7. ### Physics

what is the average force needed to stop a car traveling 28m/s in 55m?
8. ### Physics

what is the average force needed to stop a car traveling 28m/s in 55m?
9. ### physics

why do we not feel weightless even though we are in "free fall" toward the sun?
10. ### physics

An electron with initial speed = 2.54×10^7 m/s is traveling parallel to an electric field of magnitude = 1.66×10^4 N/C .
11. ### Physics

Find the maximum height reached by a ball thrown upward at a velocity of 95 ft/s
12. ### Physics

A horse on a merry-go-round is 20 ft from the center and travels at 10 mph. What is its angular speed?
13. ### Physics

At what temp would an intrensic semiconductor behave like a perfect insulator?Why?
14. ### Physics..PLZ HELP!

The magnitude of the magnetic field 8.0 cm from a straight wire carrying a current of 6.0 A is A) 3.0 ƒÎ ~ T. B) 1.5 ~ T. C) 1.5 ~ T. D) 3.0 ~ T. E) 3.0 ~ T.
15. ### Physics

What must the critical angle be if light transmits from diamond into water?
16. ### Physics

What does a simple pendulum travel through at the lowest point during its period?
17. ### PHYSICS

At what angle should you launch a projectile from the ground so that it has the greatest time of flight?
18. ### Note for Ms. Sue

Check out the Physics posting on the top of the list. Can it be deleted?
19. ### physics

A strong lightning bolt transfers about 26 C to Earth. How many electrons are transferred?
20. ### physics

a40w motor conectedto a 9v battery can lift an object 40m in 10s
21. ### physics

a 2.1 weight receives 210 j of kinetic energy by a launcher, which is pointed straight up.
22. ### physics

a 2.1 weight receives 210 j of kinetic energy by a launcher, which is pointed straight up.
23. ### physics

c). at what speed does it hit the ground? d). what total length of time is the ball in the air
24. ### physics

Find the outside surface area. Note that the containter has a top. (Assume a = 1.95 in, b = 1.35 in, c = 1.3 in, d = 1.25 in, and e = 2 in.)
25. ### physics

Two point charges, +3.27 µC and -6.15 µC, are separated by 1.08 m. What is the electric potential midway between them?
26. ### physics

what law is it when gravity pushes down on a rocket that is accelerating at a rate of 270 km/h
27. ### PHYSICS/MATH

What is your average power if you lift a 33.8 kg box at a constant speed to a height of 3.27 m in 6.10 s?
28. ### physics

How does friction slow down a moving object — for example, a soccer ball?
29. ### physics

How do we represent the graph for a ball which is dropped to the ground and caught when it bounces up again?
30. ### physics

How do we represent the graph for a ball which is dropped to the ground and caught when it bounces up again?
31. ### physics

How do we represent the graph for a ball which is dropped to the ground and caught when it bounces up again?
32. ### physics

For the vectors in the figure below, with a = 8, b = 7, and c = 113, calculate the following dot products.
33. ### physics

What type of contamination involves Rags, tie wraps, and safety wire?
34. ### Physics

1. How much work must be done to stop a 1750 kg truck traveling at 110.0 km/h?
35. ### physics

if a car goes twice as fast will the breaking distance also double
36. ### PHYSICS

EXPLAIN FRICTION AT RIGID SUPPORT OF A PENDULUM SUSPENDED USING A STRING.
37. ### Physics

Calculate the power of a hair dryer that operates on 120V and draws a current of 10 A.
38. ### physics

What is the magnitude of the electrostatic force on a +5 C harge 1.75 m to the left of a -2.5 C Charge? (show your work)
39. ### physics

A car traveling at 5.9 m/s accelerates at 2.12 m/s2 for 19.5 seconds. To the nearest meter how far does it travel.
40. ### Physics

How much work does it take to stretch a spring with k= 150N/M 10cm from equilibrium?
41. ### Physics

Find the deBroglie wavelength of a 0.10kg ball moving at 19.0m/s? Why don’t we see this wave?
42. ### Physics

If an object on Pluto has a mass of 10 kg and a weight of 6.6 N, what is the acceleration due to gravity at its location?
43. ### physics

what is the source of error occur in experiment Standing Waves (tuning fork)?
44. ### Physics

An object with an initial velocity of 5 m/s has a constant acceleration of 2 m/s^2. When its speed is 15 m/s how far has it traveled?
45. ### physics

an automobile travels at a uniform speed of 88 kph. how many metres does it travel in 1 second?
46. ### Physics

What is electric field required at the tip of sharp needle to ionize air?
47. ### physics

2) The weight of tank is 50 000 kg, area of his belts is 5 m2. What pressure acts on the ground?
48. ### physics

2) The weight of tank is 50 000 kg, area of his belts is 5 m2. What pressure acts on the ground?
49. ### physics

2) The weight of tank is 50 000 kg, area of his belts is 5 m2. What pressure acts on the ground?
50. ### physics

2) The weight of tank is 50 000 kg, area of his tracks is 5 m2. What pressure acts on the ground?
51. ### Physics

What is the force on the charge located at x = +8.00 cm in Figure 17.40(a) given that q = 5.00 µC and a = 2.50? (The positive direction is to the right.)
52. ### Physics

What is the force on the charge located at x = +8.00 cm in Figure 17.40(a) given that q = 5.00 µC and a = 2.50? (The positive direction is to the right.)
53. ### physics

if a swimmer swims 85.4 yards in five minutes, how many meters will he swim in 70.0 seconds?
54. ### Physics

Could someone explain to me about how live, earth and neutral wires work?
55. ### physics

A car accelerates uniformly from 10m/s to 24m/s.Ehat is its average speed?
56. ### Physics

I need to explain and demonstrate mathematically why it is easier to pull a wheelbarrow than it is to push it
57. ### Physics

I need to explain and demonstrate mathematically why it is easier to pull a wheelbarrow than it is to push it
58. ### Physics

how to find the max height of a cat that is thrown at 9.8 m/s and is in the air for a total of 4 seconds.
59. ### physics

Calculate the speed of an electron that is accelerated through the potential difference of 123 V.
60. ### Physics

Have no idea how to do this! Determine the weight of a 1768.0-kg car which is moving at a speed of 26 m/s.
61. ### physics

A 0.355-kg object undergoing SHM has ax = 2.30 m/s2 when x = 0.235 m. What is the time for one oscillation?
62. ### Physics - projectile

a ball is thrown straight up at 50 m/s. What speed will it be when it returns to the thrower's hand?
63. ### Physics

the higher the angle the longer an objecg will be in the air , but dose that mean it will go further ?
64. ### physics

a 4.5kw electric motor is 90% efficient.how much energy it use in 20 seconds.
65. ### Physics

5.A coin and a piece of glass are both heated to 60°C. Which will feel warmer when you touch it?
66. ### Physics

A coin and a piece of glass are both heated to 60°C. Which will feel warmer when you touch it?
67. ### Physical Science

What are three medical technologies that rely on the physics of elementary particles?
68. ### PHYSICS

How could you repair an electric fan that is not working properly? Apply scientific method.
69. ### PHYSICS

How will you prepare a laboratory procedure to verify the validity of the hypothesis? Give an example.
70. ### Physics

Can you give me the summary of work,force,potential & kinetic energy,power?
71. ### Physics

A simple harmonic pendulum has a period of 3.19 s and initial speed of 2.12 m/s. Find the length.
72. ### physics

A magnetic field is uniform in a region of radius 10 cm, and increasing at 0.02 Tesla/second.
73. ### physics

In one dimension ,how does energy depend on size of region if an electron is confined there ??
74. ### physics

3 factors that we must always give when expressing a force vector quantity
75. ### physics

3 factors that we must always give when expressing a force vector quantity
76. ### physics

3 factors that we must always give when expressing a force vector quantity
77. ### physics

A rock is dropped from rest. How fast is it going after it has been falling for 8.3 s?
78. ### Physics

A rock is dropped from rest. How fast is it going after it has been falling for 8.3 s?
79. ### physics

A speedboat increases in speed from 21 m/s to 30.9 m/s in a distance 191 m. Find the magnitude of its acceleration.
80. ### Physics

) What is the minimum uncertainty in the velocity of an electron that is known to be somewhere between 0.050 nm and 0.10 nm from a proton?
81. ### physics

What total capacitances can you make by connecting a 4.98 µF and 8.98 µF capacitor together? series ? parallel?
82. ### PHYSICS

A car traveling at 17 m/s accelerates at 1.37 m/s2 for 12 seconds. To the nearest meter how far does it travel?
83. ### Physics

What is the minimum uncertainty in the velocity of an electron that is known to be somewhere between 0.050 nm and 0.10 nm from a proton
84. ### physics

what is the mass of a vehicle traveling at 25 km/hr with a kinetic energy equal to 1 x 10 to the 4th power J?
85. ### PHYSICS

A girl rows 10 km downstream in 2 h. Her return trip takes 3 h. How fast is the current. in km/
86. ### Physics

An airplane with an airspeed of 50km/h lands on a runway where the wind speed is 30km/h .
87. ### Physics

Determine the displacement of a plane that experiences uniform acceleration from 77 m/s to 110 m/s in 16 seconds.
88. ### physics

Find the mass of 0°C ice that 10g of 100 °C steam will completely melt
89. ### Physics!

How much impulse stops a 46-kg carton sliding at 3.0m/s when it meets a rough surface?
90. ### physics

A 60 kg of sprinter accelerates from rest at 2.5 m?s^2 East for 4s. What force is acting and what is the final speed?
91. ### physics

If the electron experiences a force of 5.6 x 10-6 N, how large is the field between the deflection plates?
92. ### Physics 1

If you see an object rotating, is there necessarily net torque acting on it? Explain
93. ### Physics 1

What torque is needed to accelerate a 70Kg disk with a 20 cm radius from rest to 10 rad/s?
94. ### Physics

The maximum kinetic energy of a mass-spring system in SHM is equal to
95. ### physics

What is the magnitude of the acceleration of anelectron in a 2200 N/C electric field?I want the solution to this problem.
96. ### Physics question

Does the crest of a wave usually have a larger amplitude than the trough?
97. ### physics

10 kg of ice at -4 C is dropped into 15.1 kg of water at 36 C. What is the final temperature of the mixture? T_final =
98. ### physics

Calculate the gravity on a planet using a pendulum that has a period of 2.45 s having a length of 1.25 m.
99. ### physics

What is the maximum walking speed of an adult man whose legs are each 0.90 m long?
100. ### physics

I weigh 130 pounds, so how much would I weight on a neutron star?