# Math/Physics

215,876 results, page 49
1. ## physics

how high does a stone rise if it initially thrown at a rate of 15m/s?
2. ## physics

if a current of 4900A is applied to a copper wire what might happen to it? does it burn or what?
3. ## Physics

Does the velocity of a model rocket increase or decrease when the parachute is deployed?
4. ## Physics

calculate the kinetic energy, in J, of a 1200kg automobile travelling at 36km/h
5. ## physics

what is your age in seconds? this is a conversion problem. someone help please with all the multiplication and division... very confused. THANK YOU
6. ## physics

if you kick a football at a 30 degree angle, how many seconds is it in the air, and how high does it go
7. ## Physics

If a 75-kg skater starts his skate at 8.0m, at his lowest point (height = 0), what is his velocity?
8. ## Physics

Find the length of a bridge if it is known that the steel in the roadbed expands by 0.52 m when the temperature changes from +2 to +30°C.
9. ## physics

a 1500 kg car accelerates from 0 to 25 m/s in 7.0 s. What is the average power delivered to the engine?
10. ## physics

Calculate the momentum of a 100 kg object moving with velocity 10m/s
11. ## Physics II

What is the sign and magnitude of a point charge that produces a potential of -2.00 V at a distance of 3.00 mm?
12. ## physics Again

bobpursley can you please check my reply to your post about my question? I am not sure if I did my equation correctly. Thanks
13. ## physics

A car is moving down a highway at -15 m/s and accelerating at 3 m/s^2. If it's initial position is at x = 0 m where will it be after 3 seconds?
14. ## physics

What is the mass of an object that requires a force of 65N to accelarate it at a rate of 13 m/s2?
15. ## physics

how can we calculate potential energy if we don't have mass but we have force or newtons?
16. ## Physics

2. How many oxygen atoms are indicated on the right side of this balanced chemical equation? 4 Cr(s) + 3 O2( g)h2 Cr2O3( g)
17. ## Physics

What is a node? i'm supposed to label the nodes in a diagram of a wave but i can't find it anywhere
18. ## physics

What is the mass of an object that requires a force of 65N to accelerate it at a rate of 13 m/s2?
19. ## Physics

a football is kicked in 36 meter per second and 30 degree angle with land.After 1 second,how much it's velocity will ?
20. ## PHYSICS

What is the force of attraction between two masses 5kg and 8kg at a distance of 60cm apart.
21. ## Physics

How many kcal of heat are required to vaporize 25.0kg of water at 100°C?
22. ## physics

what is the pressure exerted on the ground by a cube which has a weight of 600n and a side of 1m
23. ## Physics

How many molecules are there in 0.029 moles of carbon dioxide gas, CO2?
24. ## Physics/Cars

Does the mass of the car matter when driving on the road? When skidding?
25. ## Physics

What element results if two protons and two neutrons are ejected from a radium nucleus?
26. ## physics hw urgent please

show how you would you arrange to find f in terms of v,m and r from four equations below. f=1/t, f=ma,v=2piR/T,a=v^2/R Thanks
27. ## Physics

A 3.5 kg body accelerates from rest to 20 m/s in 5 s. Calculate: A its acceleration B the force required.
28. ## physics

ifv=(3i+4j+5k)m/s is the instantaneous velocity of a body mass 1.50kg calculate its K.E
29. ## physics

A bus that is traveling at 35.0 km/h, speeds up at a constant rate of 3.4 m/s2. What velocity does it reach 6.8 s later?
30. ## physics

Caculate the work done when a force of 20N strecthes a spring by 50mm
31. ## Physics 112

Two point charges, +3.18 µC and -6.40 µC, are separated by 1.32 m. What is the electric potential midway between them?
32. ## Physics

If a 1.5V battery stores 5.0kj of energy,for how many minutes could it sustain a current of 1,2A?
33. ## PHYSICS

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

A dancer completes 3.4 revolutions in a pirouette. What is her angular displacement? In rad.
35. ## Physics

A person with a mass of 85kg. How much in newtons do they weigh on the earth and the moon?
36. ## physics

An electron travels 3.75 m in 6.41 × 10−8 s. How fast does it travel? Answer in units of cm/s
37. ## physics

Why is it vital that there is friction thatb opposes motion when two surfaces try to slide across one another?
38. ## physics

Find the speed of sound (in m/s) at -35°C at 1 atm pressure in dry air.
39. ## physics

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

A bus traveling at 30.0km/h accelerates at a constant 3.5 m/s^2 for 6.8s. what is its final velocity?
41. ## Physics

Find the speed of sound (in m/s) at -35°C at 1 atm pressure in dry air.
42. ## physics

A Foucault pendulum is observed to swing back-and-forth once every 20 seconds. What is its frequency?
43. ## Physics

Equation y=5 sin(3x-4) determine the freguency,speed,period of waves
44. ## physics

TWO R WHEN CONNECTED IN PARALLEL GIVE RESULTANT VALUE BECOMES 9 OHM CALCULATE VALUE OF REESISTIVITY
45. ## Physics

While riding her bicycle, she goes from a full stop to 9m/s in 3 minutes. How fast is she acclerating?
46. ## physics

Instances where the heating effect of current is not required. Plssss helllp
47. ## Derivation of Physics Equation

How do we derive these laws: (most of the time, the numbers are subscript) v'2 = v1 * ( (2 * m) / (m1 + m2) ) + v2 * ( (m2-m1) / (m1+m2) ) & v'1 = v1 * ( (m1-m2) / (m1+m2) ) + v2 * ( (2 * m2) / (m1 + m2) )

find the speed of sound (in m/s) at -35°C at 1 atm pressure in dry air
49. ## Physics

Is the tension on a rope zero just before a person releases it after swinging from one side of a river to the other?
50. ## physics

when an apple falls from a tree, and strikes the ground without bouncing, what happens to its momentum?
51. ## physics

A storage tank of negligible mass and 30 m high is filled with gasoline
52. ## Physics

A dancer completes 3.4 revolutions in a pirouette. What is her angular displacement? Help me get this answer please.
53. ## physics

A stone is thrown vertically upward at 23 m/s. How fast is it moving when it reaches 14 m?
54. ## physics

if r1=2ohms, r2=4ohms, r3=6ohms. Then what is the voltmer reading connected in series
55. ## Physics Class

The equation describing the motion of an object is y=0.8cos(4.2t+0.32). What is its period?
56. ## Physics

i need help with a very VERY long problem. its about speed and distance. will post question when someone is interested to help! :]
57. ## physics

What angle does the tangent to the curve y(x)=sin^2(x/9)+16sin(x/9) at x=9\pi make with the x-axis?
58. ## Physics

A 125 ball has a kinetic energy 33.6 What is the magnitude of it's momentum? What is the speed?
59. ## Physics

If two resistors are connected in parallel, I know that they share the same voltage but how would you determine their current?
60. ## physics

How much work does a student do if he throws a 0.750 kg ball with force of 45.0 N through a distance of 1.50 m?

62. ## PHYSICS

A 69.0 firefighter climbs a flight of stairs 22.0 high. How much work is required?
63. ## physics

How will changing the charge change the electric field strength at a distance?
64. ## physics

find the moment of inertia of the earth. Radius is 6,000 km and mass is 6 x 10^24 kg
65. ## Physics

If a ball were to fall off a 180cm table,how fast would it be going halfway to the ground?
66. ## Humanities Core

In what ways can we say that quantum physics both is and is not classical science? it has something to do with galileo but im not sure....
67. ## physics

4) How many forces act on an upwardly tossed coin when it gets to the top of its path
68. ## physics

If Zulfiqar fold this colored paper as shown in the image, which cube will he get? A C B D
69. ## Physics

A rocket is ignited and gone up. After that it returns to the ground. How to draw a displacement time of the same ?
70. ## Physics

Describe how surface area and volume are related in solids? Give an example.
71. ## Physics

What is the value of a if the object is moving with constant velocity? What does this equation reduce to in such a case?
72. ## physics

How will changing the distance change the electric field strength for a given charge?
73. ## Physics

A dancer completes 3.8 revolutions in a pirouette. What is her angular displacement? In Rad.
74. ## Physics

Two instances during which the heating effects of electric current is not required pls
75. ## physics

weight of a person in newton on mars who weigh 882N on earth ( g = 9.8m/s^2)
76. ## physics

why it is easier to tear a paper off a full roll than a mostly used one? Is it because of Newton's law?
77. ## physics

what is net force acting on the ball after attaning terminal velosity?
78. ## Physics

Does the axis system chosen affect the magnitude of potential energy? I say yes
79. ## Physics

A stone weighs 34.0 N. What force must be applied to make it accelerate upward at 4.00 m/s2?
80. ## physics

How many grams of Al2O3 are formed from 15L of O2 at 97.5kPa and at 21degree celcius.
81. ## physics

if you exert a force of 500N to walk 4M up a flight of stairs in 4S , how much power do you use?
82. ## Physics

Describe how you can determine the specific heat of an unknown metal whose mass is known.
83. ## physics

why is it harder to maintain costant accleration rather than cosntant velocity when walking
84. ## Physics

can you use principle of density and buoyancy to explain how a cartesian diver works?
85. ## Physics

If I know the length of all 3 sides in a right angle triangle, how do I get the degrees of the other angles? Which formula do I use again?
86. ## physics

The time required for a car to reach 28.5 m/s from rest, accelerating at 3.70 m/s2 is __________ .
87. ## physics

the speed of a certain wave is 3.00cm/s. if its frequency is 0.20hz, what are its wavelength and period
88. ## PHYSICS

WHAT IS THE MASS AND WEIGHT OF 1420LB OF SNOMOBILE AND 412KG OF HEAT PUMP?
89. ## physics

When an object travelling at 12.7 m/s [E] speeds up to a velocity of 21.5 m/s [E] in 3.45 s, the magnitude of the acceleration is __________m/s2.
90. ## Physics

A car travels at a speed of 70km/h. What distance will it cover in 30 minutes
91. ## physics

if you jump upward with a speed of 2mls, how long will it take before you stop rising?
92. ## Physics/chemistry

Describe the partcle Theory of a HOt air Balloon?
93. ## Physics

Why is the CM of a 1.00m length of pipe at its midpoint, whereas this is not true for your arm or leg?
94. ## physics

What is the distance from the earth's center to a point where your weight would be 1/25 of what you weigh at the surface?
95. ## physics

At a certain instant a moving object comes to momentary rest. Is it accelerating at that moment?
96. ## physics

What is the momentum of an automobile (weight = 9800 N) when it is moving at 36 m/s to the south? magnitude
97. ## physics help!

The displacement of an object is given by y = (4.6 cm) sin 28ðt. (a) What is the amplitude? (b) What is the frequency? (c) What is the period?
98. ## Physics

The pendulum is transported to another planet where the acceleration due to gravity is smaller.
99. ## physics

What force is needed to accelerate a child on a sled (total mass = 60 kg) at 1.25 m/s2?
100. ## physics

A proton is confined to a nucleus of radius 5 FM.what's the minimum uncertainty in momentum?