74,760 results, page 71
1. ## Physics

An object moves with acceleration given by a = -6t^3 m/s^2. Its initial velocity at t = 0 is 5 m/s. How far will it move before stopping? ((((((The answer is " 7.5 m " ))))) Can you please show me the solution.
2. ## PHYSICS

Determine the resulting temperature when 1kg of ice at 0 Degree celcius is mixed with 9kg of water.

What is the current produced by a potential difference of 240 volts through a resistance of 0.2 ohms?
4. ## physics

The radius of sphere at therate of 4cm per second .at what ratis its surface area chang when theradius is 6cm
5. ## physics

one side of a square bolck is 20 cm. the block weighs 320 grams. which numeral could be used to express the density? is it 0.04, 0.25, 16, or 25?
6. ## physics

if a skydiver with a surface area of 2m sq falls at a steady speed of 55m/s with a force of 900N what is the pressure on her?
7. ## Physics

What is the change in momentum for a 5,000 kg ship in outer space that experiences no net force over a 1 hr period?
8. ## PHYSICS

A cell phone emits signs in approximately 750 Mhz. Which is the wavelength and energy of this radiation
9. ## 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?
10. ## physics

Two forces of the same magnitude act at a point.the square of their resultant is 3 times the product of their magnitudes.the angle between them is?
11. ## Physics.

An electron in a hydrogen atom is revolving around the proton in a orbit of radius r and velocity v .find the current.
12. ## physics

What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is 0.24? a_{max} =
13. ## physics

a particle moving on a circlehas a velocity of m/s and normal acceleration of 10m/s2.determine the radius of the circle.
14. ## physics

The thermal capacity of 10g of a substance is 8 calories. the specific heat is in J/kg-K options : 1.3360 2.3630
15. ## Physics

What mass must be added to 0.9kg trolly to give it an,acceleration of0.4m² when a 0.6n force is applied to it?
16. ## PHYSICS

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

A ball its thrown straight up into the air at 50 m/s find the balls velocity after 8 seconds show all work please
18. ## physics

How long does it take a plane, traveling at a constant speed of 166 m/s, to fly once around a circle whose radius is 4000 m?
19. ## Physics

A roller coaster travels 41.9 m at an angle of 15.0◦ above the horizontal. How far does it move horizontally? Answer in units of m
20. ## physics

A light bulb with resistance of _____________ Omega draws 900 mA from a 110 V household circuit.
21. ## physics

A bus accelerates at 1.4 m/s2 from rest for 14 s. It then travels at constant speed for 23 s, after which it slows to a stop with an acceleration of magnitude 1.3 m/s2.
22. ## physics

what is the electric flux through a sphere that has a radius of 2.2m and carries charge of 5.3 micro couloumb at its centre? solution
23. ## Physics

A radio set at a sound level of 20 dB is suddenly increased to 80 dB. how many more time greater is the pressure amplitude at 80 dB? I do not know what to do please help
24. ## physics

A _____________ volt battery will increase the potential energy of 0.005 coulombs of charge by 29.5 joules.
25. ## Physics

Calculate the earth's orbital angular speed in radians/sec due to its motion around th sun.
26. ## physics

What is the required resistance of an immersion heater that will increase the temperature of 2.00 kg of water from 10.0°C to 50.0°C in 9.0 min while operating at 120 V?
27. ## PHYSICS

Calculate the maximum amount of stretching (in percent) that a piece of steel can undergo before breaking under tension
28. ## Physics

A radioactive substance decays from 2.0kg to 1.6kg in 156 days. How long would it take to decay to 1.1kg?
29. ## physics

While running a race, Abigail’s heart was beating at 170 beats per minute. What was the period of her heartbeat?
30. ## Physics

A body with a mass of 75 kg is located at a height of 20 m. If it is allowed to free fall to the ground. What will be its velocity on impact?
31. ## Physics

In grandpa’s time automobiles were previously manufactured to be as rigid as possible, whereas autos are now designed to crumple upon impact. Why?
32. ## Physics

A race car traveling at 44 m/s is accelerated to a velocity of 22 m/s over an 11 s interval. What is the displacement of this time? (Could you show how you got the answer?) Thank you
33. ## physics

a body projected with velocity 30m/s an angle 30¡ã with horizontal maximum height attained by he object is.........?
34. ## Physics

What is the pressure at a depth of 80 m in the ocean? The density of seawater is 1. 03 × 10 3kg/m3. Please express your answer in units of atm.
35. ## physics

A ball droppred from a tall building find the balls velocity after 7 seconds show all works please
36. ## physics

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

What is the minimum velocity for a tolerant coaster traveling on the ground to make it over 112 m hill
38. ## Physics

What is the pressure at a depth of 80 m in the ocean? The density of seawater is 1. 03 × 10 3kg/m3. Please express your answer in units of atm.
39. ## physics

harry takes a space voyage and returns to find his twin sister has aged more than he has. This is evidence that they have been in different?
40. ## physics

What are the magnitude and direction of the electric field at a point midway between a -7.0 µC and a +6.0 µC charge 2.5 cm apart? Assume no other charges are nearby.
41. ## Physics

The distance between Earth and the Moon is 3.84 * 108 m. Show that the round-trip time for the light is 2.56 s Thanks in advance
42. ## physics

water is moving at a velocity of 2m/s through a hose with an internal diameter:1.60cm. What is the flow rate in liters per second?
43. ## Physics

consider a pair of planets that find that the distance between then is decreased by a factor of 5. Show that the force between them becomes 25 times as strong.
44. ## Physics

What minimum speed does a 100 g puck need to make it to the top of a 5.9 m-long, 29 degree frictionless ramp?

46. ## physics

as an object is dropped from a high cliff, which of the following statistics can be made in regard to the objects potential energy?
47. ## Physics

A stone is thrown vertically upward, after't'second it covers a distance of's' metre, where 's'=80t-16t2. It's velocity after 2 second?
48. ## Physics

A wave with frequency 12.2Hz and amplitude 47.7 mm moves in the positive x direction with a speed of 8.9 m/s. What is the waves wavelength?
49. ## physics

A car's maximum acceleration on a dry road is 10 m/s2. What speed should it have to be able to make a turn with a radius of 47 meters?
50. ## physics

please help The power rating of an electric motor which draws a current of 5 amperes from a 240-volt line is? a. 12.0 kW b. 1.2 kW c. 48.0 kW d. 4.8 kW
51. ## Physics

A satellite orbits at an average altitude of h = 409 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 10^24 kg
52. ## physics

if a ball is thrown vertically upward and is caught 5 seconds,how fast must have been going when it left the person s hand?help
53. ## Physics

What is the power of engine that pulls a 1000 kg automobile at a steady speed of 10 m/sec along a level road?
54. ## physics

hummingbird beats wings with frequency of 80.0 Hz. What is period of bird's flaps? I know T = 1/f , but what is the label/units for the answer?
55. ## Physics

is the mechanical energy of a teflon coated block sliding down a rough incline remaining constant?
56. ## physics

A 1300 sports car accelerates from rest to 95KM/H in 7.0S .What is the average power delivered by the engine?
57. ## physics

a bullet penetrates 7 cm into a block of wood when fired at a speed of 33 m/s. Find the deceleration and the time taken to stop
58. ## physics

"How far would a tennis ball (100g) go if thrown from your catapult at a height of 1m with a force of 50 N and at an angle of 50 degrees from the horizontal?"
59. ## general physics

If wind blows at 30 m/s over a house, what is the net force on the roof if its area is 300 m^2 and is flat?
60. ## 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.
61. ## Physics

a bus moving at a speed of 20m/s begins to slow at a constant rate. Find how far it goes before stopping?
62. ## Physics

In grandpa’s time automobiles were previously manufactured to be as rigid as possible, whereas autos are now designed to crumple upon impact. Why?
63. ## Physics

The flux through a window whose surface is parallel to magnetic field lines is zero. Answer True False
64. ## Physics

Six charge equal to Q are placed at the corners of regular hexagon of each side x,what is the electric potential at the intersection of the diagonals?
65. ## physics

A train with a velocity of 45.1 m/s must come to an emergency stop in 10.6 s. How far did it travel during this time? i tried to use the x=1/2at^2+vit+xi equation but that did not work..
66. ## physics

Over a period of 9.0 seconds a plane changes its velocity from 29.5 m/s to 45.7 m/s. What is its uniform acceleration? ---------------- I'm reviewing for my final and i can not think of what the formula to solve this is.
67. ## physics

A broom handle has a length of 1.67m and a mass of 580g with the axis rotation through the center. (what is this problem asking me to do?)
68. ## physics

How long does it take a plane, traveling at a constant speed of 160 m/s, to fly once around a circle whose radius is 3450 m?
69. ## physics

I need to make a holder for a raw egg out of straws so when it is dropped from 8 feet. it will not break I need design ideas.
70. ## physics

Explain the interference due to thin flims and ahows that the reflected and transmitted systems are complementary to each other.
71. ## physics

what minimum initial velocity must aprojectile have to reach atarget at a distance of 25m away?(use g=10m/s square)
72. ## Physics

The length of wire is 25.5cm and it's radius is 1.02mm. Calculate the percentage error in mesurement of its volume
73. ## physics

an object undergoes an acceleration of 10m/s2 starting from rest. find the distance travelled by it in seconds
74. ## Physics

what type of heat transfer does solar hot water heating use? (conduction, convection, radiation)
75. ## Physics

An arrow is shot horizontally with a speed of 20 m/s from the top of a tower 60 m high .The time to reach the ground will be???????
76. ## Physics

A car accelerates at a constant rate from 13m/s to 25m/s in 6.0seconds. What was its acceleration? How far did it travel in this time?
77. ## physics

If there were no air drag, how fast would drops fall from a cloud 2.4 kilometer above the Earth's surface? answer in m/s.
78. ## physics

If two cars are moving head on toward each other at 88 km/h(55mi/h, and their drivers apply their brakes when they are 85 m apart, will they collide? This is a yes or no answer and explain why
79. ## physics

What is the free-fall acceleration in a location where the period of a 2.03 m long pendulum is 2.86 s s? Answer in units of m/s squared
80. ## Physics

In terms of Ohms Law (V=IR), when plotting a graph of V against I, is it safe to say that the line passes through the origin, even though 0/0 does not exist?
81. ## Physics

Calculate the height through which a crane can lift a load of 4t , when its motor of 4HP operates for 10s. [Take g=10N/kg ]
82. ## Physics

What magnitude of force, acting for 0.025 s, will change the velocity of a 100 g ball from 30 m/s eastward to 40 m/s westward?
83. ## physics

Determine the stopping distances for a car with an initial speed of 93 km/h and human reaction time of 3.0 s for the following accelerations: -4.00 m/s^2 -8.00 m/s^2
84. ## physics

A motorbike accelerates uniformly at 0.6m.s for 10s. If it covers a distance of 500m. During this time, what was its initial velocity?
85. ## physics

A 4.00kg kg bucket of water is accelerated upward by a cord of negligible mass whose breaking strength is 73.0N N .
86. ## Physics

Repairing a spaceship CJ drops a hammer and it took .68 s to fall .90 m to the ground. What is the magnitude of the gravitational accerleration on mars
87. ## physics

Calculate the energy released in the fusion reaction 2 3 4 1 1 H + 1 H->2 H +0 n. The atomic mass of 3 1 H (tritium is 3.016049 u. I am lost! help please!
88. ## PHYSICS

Which simple machine has more mechanical advantage a pulley or a inclined plane? PlEASEE HELP SUPER CONFUSED
89. ## physics

A speedboat increases in speed from 19 m/s to 31.4 m/s in a distance 193 m. Find the magnitude of its acceleration. Answer in units of m/s
90. ## physics

A bullet is shot straight down at a speed of 3.9 m/s. After 2.3 seconds, how fast is it moving? Use 10 m/s2 for gravity. Give answer in m/s.
91. ## physics

a 200N sign is held by two wires that have 150 degree angle between them. find the tension in each wire.
92. ## physics

At highway speed, a particular car is capable of an acceleration of about 1.7m/s^2.At this rate how long does it take to accelerate from 90 km/h to 110 km/h? (in seconds)
93. ## Physics

If the visible part of an ice berg is 50mx50m in area and 20m is above the surface, what is the height, h? I tried using FB=FG but I don't get anywhere. Can anyone help me out?
94. ## physics

Sam tosses a ball horizontally off a footbridge at 4.8 m/s. How much time passes after he releases it until its speed doubles?
95. ## physics

How can the LIGO gravity wave detector achieve a measurement accurate to 1/1000 of a proton's diameter
96. ## physics

Calculate the net charge on a substance consisting of a combination of 8.9 × 10 13 protons and 4.4 × 10 13 electrons. Answer in units of C
97. ## Physics

How much pressure is exerted on a submarine at a depth of 8.50 km in the Pacific Ocean? (density of sea water = 1.025 x 10^3 kg/m3, P0 = 1.01 x 10^5 Pa)
98. ## physics

A bicycl rider starts from rest and moves with uniform acceration of 1.5m\s^2 it is velocity reachs 7.5m\s of a distance .......
99. ## Physics

An infinite thread of charge density lamda lies along Z axis. The potential difference between the points A(4,3,4) and B (3,4,0)is?
100. ## physics

Charge polarization is normally produced by: nuclear interactions. contact. induction. friction. electrostatic means.