# Chanz

Most popular questions and responses by Chanz
1. ## Physics - Am I correct?

1. A stationary curling stone is struck in a glancing collision by a second curling stone of equal mass. If the first stone moves away at a velocity of 0.92 m/s [N71oW] and the second stone moves away at a velocity of 1.25 m/s [N44oE], what was the initial

2. ## Physics - Repost because of no response

1. A stationary curling stone is struck in a glancing collision by a second curling stone of equal mass. If the first stone moves away at a velocity of 0.92 m/s [N71oW] and the second stone moves away at a velocity of 1.25 m/s [N44oE], what was the initial

1. ## physics

T = 2pi sqrt(m/k) Start the second at T/2

posted on June 9, 2016
2. ## Physics

100 - mg sin30 = ma

posted on June 9, 2016
3. ## Physics I (Classical)

tan-1(2/3) t = x/v = 85/3

posted on June 8, 2016
4. ## Physics

mc(Tf - Ti)coffee + mc(Tf - Ti)milk = 0 solve for Tf (and you'll need to look up the specific heat of water)

posted on June 8, 2016
5. ## Physics

Sure don't. After 1 sec both she and the bus are moving east at 2 m/s so someone on the ground sees 4m/s. At 2 sec the bus is moving 4m/s so someone outside sees 6m/s

posted on June 7, 2016
6. ## Physics

Area = pi r^2 Look at your units and figure out what needs to be multiplied by what.

posted on June 7, 2016
7. ## physics

a) mv (gun) = mv (bullet) b) 1/2mv^2 = Fd solve for f (and watch your units)

posted on June 7, 2016
8. ## Physics

1/p + 1/q = 1/f Solve for q (the height doesn't enter in to it)

posted on June 7, 2016
9. ## physics check

yes

posted on June 7, 2016
10. ## Physics help

Square both sides, cross multiply, divide both sides by m^2, subtract 1 from each side, multiply both sides by -c^2

posted on June 7, 2016
11. ## Physics

v^2 = 2gx Solve for x and don't forget to add in the initial 105.

posted on June 7, 2016
12. ## Physics

Oooooh. Sorry. N

posted on June 7, 2016
13. ## Physics

All I see to the right is an ad.

posted on June 7, 2016
14. ## Physics

v^2 = 2gx solve for v

posted on June 7, 2016
15. ## Physics

Definitely unit 9

posted on June 7, 2016
16. ## physics

23. They'll come to an equilibrium temp regardless.

posted on June 7, 2016
17. ## physics

Actually it can be greater than one. Velcro for example has a mu greater than one.

posted on June 7, 2016
18. ## Physics

tan-1 (10/200)

posted on June 7, 2016
19. ## physics

See other post

posted on June 7, 2016
20. ## Physics

Acceleration is not a force. The fourth force is the normal force the ramp exerts on the log.

posted on June 7, 2016
21. ## physics

KE = 1/2 mv^2 Solve for v I get 3.69

posted on June 7, 2016
22. ## Physics

f = fo v/v-vs You'll have to look up the speed of sound at 10o, and don't forget to convert to m/s

posted on June 7, 2016
23. ## maths,science, physics

Another conservation of momentum question. mv before = mv after. Solve for second v.

posted on June 7, 2016
24. ## maths,science, physics

Conservation of momentum. Zero = zero.

posted on June 7, 2016
25. ## maths,science, physics

Little pushy aren't you? Especially since we have no diagram.

posted on June 7, 2016
26. ## Physics

Water at 900 is called steam and it can have a wide variety of densities based on pressure.

posted on June 7, 2016
27. ## Physics

See next post

posted on June 7, 2016
28. ## Physics

3.9 = vo cosθ (.555) ½ g (5552 ) = vo sinθ Divide eq 2 by eq 1 to clear vo do a tan-1 to solve

posted on June 7, 2016
29. ## physics

Nope. All I can tell you is that 100g of water has been displaced.

posted on May 12, 2016
30. ## physics

Not enough info

posted on May 12, 2016
31. ## Physics

P = E/t

posted on May 12, 2016
32. ## Physics

If you just do a FBD on the last cart and ignore all the rest a = F/m = 3.3/2.2 = 1.5 A classic example of useless smoke and mirrors.

posted on May 12, 2016
33. ## physics

You're in the wrong forum and you refer to a question that isn't there.

posted on May 12, 2016
34. ## Biomechanics/Physics

W = mgh Time has no bearing.

posted on May 12, 2016
35. ## Physics

L = Iω You'll have to look up I for a solid cylinder and a mass at a distance. Also need to convert rev/sec into rad/sec. When you have a) and b) add them for your total L. Find the new I for masses at the new distance. Then conservation of L

posted on May 12, 2016
36. ## Physics - Fields

v = k/r^2 solve for k Now use k and find v for r=1 and r=2. The difference of those (remember v is a vector) will be your answer.

posted on May 12, 2016
37. ## Physics

You're on the right track. Note that x=0 when the rocket lands, solve for t and then x = vt to see how far it drifted.

posted on May 12, 2016
38. ## physics

vx stays constant at 16cos28 time to goal = 16.8/16cos28 vy at goal = = 16.8sin28(t)- 1/2gt^2 Then Pythagoean with vx and vy

posted on May 12, 2016
39. ## physics

τ t = ΔIω Solve for ω θ = ωt and s = rθ Same technique for part two with new τ

posted on May 12, 2016
40. ## physics

L = I omega you'll have to assume it's a solid sphere which is not quite correct (or you can look up the correct I for earth). Now how do you get omega? How many radians in how much time?

posted on May 12, 2016
41. ## physics

t = v sin35/g x = v cos35 t

posted on May 12, 2016
42. ## Physics

See next post

posted on May 12, 2016
43. ## Physics

t sound = x/vs t cannonball = x/vc difference is warning time

posted on May 12, 2016
44. ## PHYSICS HELP Harmonic Motion

m1v1 = (m1+m2)vf 1/2 (m1 + m2) vf^2 = 1/2 kx^2 solve for x

posted on May 12, 2016
45. ## Physics

time to get to 8th floor: t = v/g distance fallen during that time: y = 1/2gt^2 divide by 8m/floor and yes it fell 15 floors total (watch, the last is 12m)

posted on May 12, 2016
46. ## PHYSICS

mu(m1+m2)g = (m1+m2)a so mu(g) = a speed before slide begins: v = sqrt(2ax) m1 vi = (m1+m2)v solve for vi

posted on May 12, 2016
47. ## Physics

P = 2 pi sqrt(L/g) Solve for L L - Lcos5.34 = h now mgh = 1/2mv^2 and the m's cancel, solve for v

posted on May 12, 2016
48. ## Physics

P = W/t

posted on May 12, 2016
49. ## Physics

v = f(lambda) v in this case is x/t then solve for f

posted on May 12, 2016
50. ## Physics

v = f (lambda) Solve for lambda

posted on May 12, 2016
51. ## Physics

Normal: Fn=mr(omega^2) You'll need to change rev/sec into rad/sec Friction: Ff= mg Coefficient of friction mu = Ff/Fn

posted on May 12, 2016
52. ## Physics

E = mgh Solve for h

posted on May 12, 2016
53. ## Physics

x = vt

posted on May 12, 2016
54. ## physics

In y max height: y = v^2/g time: t = 2v/g In x x = vt (you found from y)

posted on May 12, 2016
55. ## physics

PE = mgh Convert to kg

posted on May 12, 2016
56. ## Physics

4.59e-6/pi r^2 = v Watch your units.

posted on April 21, 2016
57. ## physics

"in the drawing"

posted on April 21, 2016
58. ## Physics

a) Fb = mg + T b) Can't tell. Is it submerged? How deep is the water?

posted on April 21, 2016
59. ## physics

This can't be solved without knowing the distance the car travelled. Fd - mgh - 1/2mv^2 = W lost

posted on April 21, 2016
60. ## physics

Umm. Didn't you just tell me 30cm

posted on April 20, 2016
61. ## Physics

Sorry should just be V = Ed End of the day....

posted on April 20, 2016
62. ## Physics

PE = Eq/d (Change in voltage is PE)

posted on April 20, 2016
63. ## Physics

a) W = Fd That's the change in KE b) Same thing c) Now you must find the final velocities. KE = 1/2mv^2, solve for v momentum = mv d) momentum is always conserved e) a = F/m, v = at, solve for t

posted on April 20, 2016
64. ## Physics

posted on April 20, 2016
65. ## physics, english, chemistry, maths

400 grams. Small girl. Small steps too. Anyway P = mgh/t. Need to convert your units.

posted on April 20, 2016
66. ## physics

a) V = BA/t (you've been given B/t) b) i = V/R c) E/t =P = Vi

posted on April 20, 2016
67. ## Physics

.8g - .55g = (.55+.8)a T-.8g = .8a (you can choose either)

posted on April 20, 2016
68. ## physics

The boy is imparting an impulse with his jump which we know nothing about.

posted on April 20, 2016
69. ## Physics helpppp

Two eq, two unknown: .25(9) = (.25+m2)vf 1/2(.25 + m2)vf^2 = 8.1

posted on April 20, 2016
70. ## physics

Does the first ball stop? If so the second has twice the mass. KE = 1/2mv^2

posted on April 20, 2016
71. ## physics

Since the second capacitor is 4x as big it will hold charge in a 4:1 ratio.

posted on April 20, 2016
72. ## Physics

Is there a moderator who can get Kenneth banned. We don't need this. Not to mention T - mg = ma is correct. Look at the directions. T and a are up, g is down.

posted on April 19, 2016
73. ## Physics

Gotta side with Damon on this one. KE is not conserved, but momentum is.

posted on April 19, 2016
74. ## Physics

a) v = at b) t = v/a d) x = 1/2 at^2 e)x = vt f) x = 1/2at^2 g) v = total dist/total time

posted on April 19, 2016
75. ## Physics

You just said same temperature. So 27.

posted on April 19, 2016
76. ## Physics

a = v^2/r µ = Ff/Fn = (v^2/r)/g (m's cancel)

posted on April 15, 2016
77. ## PHYSICS PLS HELP ME EVERYONE

posted on April 15, 2016
78. ## physics

Do each individually, then add (or subtract) the two vectors F = kq1q2/r^2 for example for a) F = 9e9(86.5e-3)(18.8e-3)/.488^2 pulling towards negative x direction now do it for the 36.3e-3 charge which also pushes towards the negative x direction.

posted on April 15, 2016
79. ## PHYSICS!!

Toward: fo = fs (1+vo/v) away is minus instead of plus.

posted on April 15, 2016
80. ## PHYSICS

Look at the units gray = J/kg How will you get joules out of this?

posted on April 15, 2016
81. ## PHYSICS

v= fλ

posted on April 15, 2016
82. ## PHYSICS

We have no way of knowing the arrangement of the charges. Are they the vertices of a triangle? Are they on a line? See, the phrase "as shown" means that we can see it. We can't. I can tell you in general how to do these. Draw a line between A and the first

posted on April 14, 2016
83. ## physics

Why?

posted on April 14, 2016
84. ## physics

P = W/t So what's the net work you're getting out of the system?

posted on April 14, 2016
85. ## AP Physics

See prev post. I can't go step by step without showing you a free body diagram. So you make one. It will help you learn the material.Separate the Tension force into its components and look and see what's happening in x and y. Geez you're in AP. Use your

posted on April 14, 2016
86. ## AP Physics 1

As shown....how I hate those words.

posted on April 14, 2016
87. ## physics

Q = mc ΔT + mL You'll need to look up specific heat and latent heat of fusion for copper. And you need to know its melting point.

posted on April 14, 2016
88. ## physics

a) equal and opposite b) put in the numbers and see c) only electrons ever move d) from negative to positive

posted on April 14, 2016
89. ## physics

C = κεoA/d εo is a constant make sure to convert units

posted on April 14, 2016
90. ## Physics Help

I did this in a previous post. I said Fdrag - mg = ma Not really sure which they're asking for.

posted on April 14, 2016
91. ## Physics

Well F = P/A I guess that's what they're looking for.

posted on April 14, 2016
92. ## physics

See prev post.

posted on April 13, 2016
93. ## physics

Oops. I mean 20 m/s. Even more ridiculous.

posted on April 13, 2016
94. ## physics

PS. He's rowing 10 m/s by the end of this. Don't think too many people can row 22 mph....

posted on April 13, 2016
95. ## physics

x = 1/2 at^2 (across) solve for t x = vt (downstream)

posted on April 13, 2016
96. ## physics

y components cancel. From A: kq/r^2 cos 60 in positive x direction From C: kq/r^2 cos 60 in positive x direction So save time: E = 2kq cos60/r^2

posted on April 13, 2016
97. ## AP Physics

As shown....

posted on April 13, 2016
98. ## AP Physics

First find the tension in the thread: Tcos18 = mg Now the charge Tsin18 = kq^2/r Find r from geometry .25 sin18 = r/2

posted on April 13, 2016