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

asked on January 19, 2016
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

asked on January 19, 2016
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

Just add the two.

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

Sigh..."as shown". Perhaps the amazing Kreskin can help you.

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