# physics( i have no idea how to go about gettign th

80,325 results, page 81
1. ## physics

an object is dropped from a vertical cliff. How long does it take to reach 85 km/h?
2. ## physics

a suicase measrues 1.0m x 0.5m x 0.2m it has a mass of 10kg, what is its weight in newtons?
3. ## physics

3 factors that we must always give when expressing a force vector quantity
4. ## Physics

Light elements formed in Big bang theory ?
5. ## Physics

What is the Michelson and Morley experiment? Please don't give me Wikipedia
6. ## Physics

How do you get the velocity of a particle given a potential energy diagram and its mass?
7. ## PHYSICS 1A

how much current is drawn by a lamp that has a resistance of 1.2 O when a voltage of 6.8 V is impressed across it/
8. ## physics

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

A 5kg mass was lifted 365cm, how much work was done against gravity?
10. ## physics

3 factors that we must always give when expressing a force vector quantity
11. ## Physics

a freight train has two engines, each with a mass of 50,000 kg. pulling
12. ## physics

In our country and in most of other countries ,the Celsius scale is more commonly used . Can you think of a reason for this?
13. ## physics

explain the terms uniform acceleration and average speed.
14. ## physics

differentiate between law of paralleogram and resolution of component of force.
15. ## Physics

If radius = 1.25 when i am swinging a bucket around and around what is the slowest possible speed i can go without it spilling?
16. ## Physics

What is the average useful power output of a person who does 5.90×106 J of useful work in 7.90 h?
17. ## physics

Hi, How can you charge an electroscope negatively? Is it by using a positively charged rod? Can someone please help me? Thank you :)
18. ## Physics

How many electrons in an atom can have each of the following quantum number or sublevel designations? 1. n=4, l=3
19. ## physics

How much time is required for sound to travel 1.4 km through air if the temperature is 30.0 c
20. ## Physics

A 20 kg block is placed on a 35 degree ramp. What is its true metric weight?
21. ## physics

according to the statement given what is the magnitude of the velocity of the rock just before it strikes the ground
22. ## physics

do all electrons ejected from a metal surface have the same kinetic energy?
23. ## Physics

A truck starts from rest and accelerates at 2.0 m/s² for 4.0 s. How far will it have gone at the end of this time?
24. ## Physics

How is time peroid the reciprocal of frequency? Plz explain
25. ## Physics

what is the accuracy percent of 11 divided by 267 times 100?
26. ## Physics

Calculate the weight of an object whose Mass is 5kg.(take g=10m\s
27. ## PHYSICS

Can someone please explain friction. i don't even understand the concepts parts!
28. ## physics

An automobile with a mass of 1400 kg has a speed of 30.0 m/s. What is its kinetic energy
29. ## Physics

what must be the net force if a 19.9 kg mass accelerates to the left at a rate of 2.2m/s^2?
30. ## Physics

A man walks 3km E and then 4km N. What is his resultant displacement?
31. ## Physics

A 55 kg skier is going down a slope with an angle of 47 degrees. Mk= 0.15. How fast is he going after 6 seconds?
32. ## Physics

the energy of a ball rolling up an inclined place plane is?
33. ## physics

find a unit vector parallel to the resultant of vectors : A=2i^+j^-k^& B=3i^-2j^+2k^
34. ## Physics

Am i correct? If a 10.0 kW device pulls 20.0 A of current, what voltage exists across it? A. 5.0 *10^0 V B. 5.0 *10^1 V C. 5.0 *10^2 V D. 5.0 *10^3 V <---
35. ## PHYSICS

A BODY CHANGES IT'S VELOCITY FROM 20M/S UNTIL IT COMES TO REST IN 10 SECONDS.WHAT IS IT'S ACCELERATION
36. ## Physics (easy level)

What would a Potential energy to velocity^2 graph be?
37. ## physics

why is machinery not 100% efficient Friction, heat loss
38. ## Physics

What is the mass (in Grams) of a block of aluminum that has a volume of 385 mL
39. ## Physics

A bus slows down uniformly from 75 km/h to 15 km/h in 12.55 s. How far did the car travel before stopping?
40. ## physics

A mass of 10kg moves with a velocity of 4m/s. What is its kinetic enery
41. ## Physics

What is the magnitude of the earth's gravitational field at sea level?
42. ## physics

a 2.00 * 10^5 kg lunar landing craft is about to touch down on the surface of the moon
43. ## Physics

Can you find a vector quantity that has a magnitude of zero but components that are different from zero? Explain.
44. ## physics highe school

Explain the different sections of the graph in as much detail as you can?
45. ## physics

What is the apparent weight of a 55 kg person in an elevator accelerating downward at 2.2 m/s2?
46. ## Physics

How do the initial and final horizontal velocities of a projectile compare?
47. ## Physics

how much energy is required to change 40 g of ice at -10 C to steam at 110 C?
48. ## Physics

Find the magnitude of the dot product of the two vectors B=6i+j+2k, D=-1+3j. What is the angle between B and D
49. ## physics

A balloon with a radius of 20.0 m at 6.0 oC is heated to 32.0oC. Find the new volume.
50. ## Physics

What is the wavelength of a 512 Hz sound wave in 20 degree C air?
51. ## Physics

What electromagnetic waves are dangerous for humans and why? I have microwave, xrays....can you help name a few
52. ## Physics

Calculate the weight of an object whose Mass is 5kg.(take g=10m\s
53. ## Physics

Calculate the magnitude of the potential difference between points a and b in the figure if R1=2.36 Ù, R2=4.29 Ù,and R3=10.08 Ù.
54. ## physics

what is the speed of 1kg object when the kinetic energy is 1 joule
55. ## Physics

What is the frequency of an electromagnetic wave if it has a wavelength of 1.4 km? The speed of light is 3 × 10 8 m
56. ## Physics

A coil of wire has a resistance of 31.8Ω at 28 °C and 55.6Ω at 53 °C. What is the temperature coefficient of resistivity?
57. ## physics

if the earth exerts a force 300n how much does the body weigh?
58. ## physics

Athelet meseret defar runs at 10m/s. How long will take her to go?
59. ## physics

find the total positive charge in 200gram of water
60. ## physics

A projectile is launched straight upwards at 45 m/s. Three seconds later, its velocity is A. 75 m/s B. 30 m/s C. 15 m/s D. zero
61. ## physics

how do types of nuclear radiation differ in electric charge?
62. ## physics

if the distance between two bodies is increased by 25% then % change in the gravitational force is
63. ## Physics

What is the wavelength of a 512 Hz sound wave in 20 degree C air?
64. ## Physics

Problem2-AFor A=-I+2j +5k and B=2j-3k,find: a) The dot productA.B b) The angle between the A and B
65. ## Physics

What is the energy released in the fusion reaction: 2H+2H--> 4He + Q? How do I calculate this?
66. ## Physics

A and B are vectors in the same plane. If A= 8i+6j. Find the vector B such that |A+B| = 14.14 units and A is perpendicular to B.
67. ## 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.
68. ## physics

A person swims with a speed v realative to water What dose this mean?
69. ## physics

find the resultant force 10N and 20N acting at 30¡ã
70. ## physics

Essay on how accleration due to gravity is used to benefit mankind
71. ## Physics

I just have a question....How to know if the volt is -ve or not? and How to know if a charge has deficit or excess electrons ?
72. ## physics

a plane travelling at 200.0m/s braked to a stop in 6.2s. what was its acceleration?
73. ## PHYSICS

When you have more pulleys does the mechanical advantage and efficiency increase or decrease?
74. ## physics

The slope of a Velocity versus Time graph will tell you the object’s what
75. ## physics

How long does it take a 25 kW steam engine to do 5.6 × 10^7J of work? Answer in units of s
76. ## physics

the number of degrees of freedom for a rigid diatomic molecule is ------------
77. ## physics

what will be the distance time graph for a train standing at a station?
78. ## physics

What is an object that is launched into the air and undergoes free fall
79. ## physics

How would you do this? The K is 25.0 N/M The spring's max amount of elastic potential energy?
80. ## physics

express the angular velocity of the second hand on a clock in rev/hr
81. ## conceptual physics

How do you calculate the time a boat has traveled at 25 knots
82. ## physics

What are the x and y components of a velocity vector of magnitude 1.00 x 10^2 km/h and direction of 240?
83. ## physics

At what angle with the north would he have to walk? Answer in units of ◦ .
84. ## Physics

A proton is at the origin and an electron is at the point x = 0.36nm , y= 0.30nm .
85. ## physics

two forces 5N and 7N act on an object respectively.When will the resultant of the two vectors be at a maximum?
86. ## physics

Find the mass in grams of a carbon dioxide molecule.
87. ## physics

A car accelerates from rest at 7.9 m/s2. How much time does it need to attain a speed of 5 m/s?
88. ## Physics

What are some common examples of light refraction, excluding rainbows?
89. ## physics

what is the wavelength of neutron (m=1.67x10^-27kg) travelling at 3.0x10^4 m/s?
90. ## physics

need help can someone please tell me Electricity is often converted into other forms of energy. List 3 examples.
91. ## Physics

Find the components of the vector with length = 1.00 and angle 30.0 as shown.
92. ## Physics

What is the electric field midway between an electron and a proton separated by 0.7 nm?
93. ## physics

Explain the term uniform acceleration and average speed
94. ## physics

What is the distance travelled in 22 s as a given sound moves through carbon dioxide at 0 C?
95. ## physics

How would you do this? The K is 25.0 N/M The spring's max amount of elastic potential energy?
96. ## physics

i was just wondering what approx is the change in PE in J when standing up from your chair and the KE when walking in J.
97. ## Physics

If the speed of the wave is 330 per sec calculate the wavelength
98. ## physics

describe the shape of the graph made and discuss its significance.
99. ## physics

Is the motion of the rider for each angle of inclination uniformly accelerated? Why or why not?
100. ## physics 11

Displacement i sgivenby x=2+3t+4t2. Find the value of instantaneous acceleration.