Wednesday

April 23, 2014

April 23, 2014

Number of results: 60

**phsics**

Thanks.
*Thursday, February 24, 2011 at 8:02am by bobpursley*

**phsics**

Exactly!
*Thursday, September 23, 2010 at 10:15pm by MathMate*

**phsics**

From A+(-A)=0 can you deduce something?
*Thursday, September 23, 2010 at 10:15pm by MathMate*

**phsics**

thanks that makes sense
*Monday, September 27, 2010 at 3:50pm by help*

**phsics**

linear velocity= w*r
*Monday, September 27, 2010 at 4:10pm by bobpursley*

**Phsics**

I want to see the calculations.
*Wednesday, February 1, 2012 at 8:55am by The range of a target is found to be 20km. A shell leaves a gun with a velocity of 500ms-1. What must be the angle of elevation of the gun if the ground is leueled?*

**PHSICS**

Use Snells law.
*Thursday, January 28, 2010 at 10:22am by bobpursley*

**termodynamic/phsics**

i still need help plz
*Thursday, January 6, 2011 at 3:55am by adam*

**termodynamic/phsics**

i still need help plz
*Thursday, January 6, 2011 at 3:55am by adam*

**termodynamic/phsics**

i need more explanation
*Thursday, January 6, 2011 at 3:55am by adam*

**phsics**

what is pumped into walls for insulation? help please :(
*Sunday, March 8, 2009 at 1:23pm by lorney*

**phsics**

sorry im not sure how to calculate the time
*Wednesday, September 22, 2010 at 7:30pm by Anonymous*

**Phsics**

W = (25.9/9.8) * 772 = 2040.3N. on Jupiter.
*Monday, November 7, 2011 at 1:45pm by Henry*

**phsics**

I'm having some trouble with a question how do you find a vector that balances another one
*Thursday, September 23, 2010 at 10:15pm by Emma*

**phsics**

What is the magnitude of the linear acceleration How far does the coin roll before it stops?
*Monday, September 27, 2010 at 4:10pm by Anonymous*

**phsics**

so the magnitude will be the same and you have to add 180 degrees to the the original angle right..
*Thursday, September 23, 2010 at 10:15pm by Emma*

**termodynamic/phsics**

Hi! Can you explain how did you get this equation (mass flow rate)*DeltaT*(4.18 J/ C g)= 1000 J/s
*Thursday, January 6, 2011 at 3:55am by adam*

**phsics**

I wonder what phsics is. What difference does it make how high the lampost is? I remember one of my (ex)students coming to my house once to visit my daughter, the girl driving missed the turn, went across the lawn (it was wet), slid into my front house wall on the porch, and ...
*Thursday, February 24, 2011 at 8:02am by bobpursley*

**phsics**

It appears you are answer grazing. If you want help, show your work, and we will critique your work.
*Wednesday, December 9, 2009 at 3:08pm by bobpursley*

**phsics**

It appears you are answer grazing. If you want help, show your work, and we will critique your work.
*Wednesday, December 9, 2009 at 3:07pm by bobpursley*

**phsics**

mostly air, but usually it is a foam that hardens, the foam is often a urethane complex.
*Sunday, March 8, 2009 at 1:23pm by bobpursley*

**intro to phsics**

set up the vectors as (x,y) components, and then just add them up, like complex numbers: (0,3) + (4,0) = (4,3)
*Wednesday, October 12, 2011 at 9:24pm by Steve*

**intro to phsics**

if one vector points north at 3m/s, and another points east at 4m/s, what would be the "resultant" of those two when combined?
*Wednesday, October 12, 2011 at 9:24pm by ryan*

**phsics**

a 4-kg box is pushed across a level floor with a force of 60n for a displacemen of 20m then lifted to a height of 3 m. what is total work done on the box?
*Sunday, October 23, 2011 at 2:32pm by kelsie*

**phsics**

If the speed is increasing, the acceleration cannot be zero. If the particle also remains moving along the x-axis, the velocity and acceleration must have the same direction.
*Monday, September 2, 2013 at 10:05pm by Graham*

**phsics**

calculate the time it takes to hit the sea. Now use that time in a horizontal equaiton, distance=horizontalvelocity*time
*Wednesday, September 22, 2010 at 7:30pm by bobpursley*

**PHSICS**

A boxcar of mass 200 tons at rest becomes uncoupled on a 2.5 degree grade. If the track is considered to be frictionless, what speed does the boxcar have after 10 seconds?
*Sunday, October 19, 2008 at 11:59pm by NICKI*

**Phsics**

A disk on an air table is acted upon by the following forces 100 N 90 250 N 135 150 N 200 200 N 60 155 N 270 What is the force on the puck?
*Monday, September 26, 2011 at 6:18pm by Michael*

**PHSICS**

a=gsin(theta) a=9.8 sin 25° a= 0.43 Uf=Ui +at Uf= 0 + a(10) Uf=0 +4.3 Uf=4.3 m/s
*Sunday, October 19, 2008 at 11:59pm by Richard*

**Phsics**

A man weighs 772 N on Earth. What would he weigh on Jupiter, where the free-fall acceleration is 25.9 m/s2? The acceleration of gravity is 9.8 m/s2 . Answer in units of N
*Monday, November 7, 2011 at 1:45pm by Drake*

**Phsics**

What is the terminal speed for an 77.0kg skier going down a 44.0 degrees snow-covered slope on wooden skis uk= 0.060? Assume that the skier is 1.70m tall and 0.300m wide.
*Thursday, February 14, 2013 at 3:05pm by Tony*

**phsics**

A 75 kg man weighs 735 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 15% of his body weight?
*Monday, February 17, 2014 at 5:03pm by Anonymous*

**phsics**

at what speed would a car need to hit and knock down a metal 7 ft. lampost on a grass surface with a plastic bumber about a foot off the ground, and what damage would be done to the car
*Thursday, February 24, 2011 at 8:02am by fran*

**phsics**

So I assume the angle of whirling is parallel to the ground. Time to fall 2.8 m: 2.8=4.9t^2 solve for time in air. 29m=Vi*timeinair solve for Vi. then, centripetal acceleration
*Monday, September 27, 2010 at 3:50pm by bobpursley*

**phsics**

A lawn roller is pushed across a lawn by a force of 125 N along the direction of the handle, which is 22.5° above the horizontal. If 63.5 W of power is developed for 90.0 s, what distance is the roller pushed? 152.4 m
*Wednesday, December 9, 2009 at 3:08pm by Manny Aragon*

**phsics**

Vf^2 = Vo^2 + 2ad. Vf^2 = 0 + 2*16*402 = 12,864, Vf = 113.4m/s. Vf^2 = (113.4)^2 + 2*(-5.6)*290 = 9616, Vf = 98m/s.
*Tuesday, August 23, 2011 at 7:23pm by Henry*

**phsics**

m g = G M m /r^2 so m does not matter if we only want ration G M is constant r = earth radius (any units) but be consistent. You might use 6.38*10^6 kg R = r + d .85 G M/r^2 = G M/(r+d)^2 r^2 = .85 (r+d)^2 r = .922 (r+d) r - .922 r = .922 d d = r (1-.922)/.922 = .0846 r
*Monday, February 17, 2014 at 5:03pm by Damon*

**Phsics**

What force must be exerted on block A in order for block b not to fall. The coefficient of static friction between block A and B is 0.55, and the horizontal surface is frictionless. A= 100kg and B=10kg A is on the horizontal surface and B is attached to A.
*Monday, October 3, 2011 at 6:20pm by Kayla*

**phsics**

An artillery shell is launched on a flat, horizontal field at an angle of α = 31.5° with respect to the horizontal and with an initial speed of v0 = 266 m/s. What is the horizontal distance covered by the shell after 9.44 s of flight? What is the height of the shell at ...
*Wednesday, September 22, 2010 at 9:24pm by Anonymous*

**phsics**

You plan to throw stones by using a sling of length 1.8 m which you whirl over your head. Suppose you wish to throw a stone a distance of 29 m. What must be the centripetal acceleration of the stone just before its release if it is to reach this distance? Assume that the ...
*Monday, September 27, 2010 at 3:50pm by help*

**phsics can someone check if i did it right**

A block of wood of mass 3kg is on a rough incline of 37degrees. Find the min value of the coefficient of static friction for the block to remain stationary? Fn=3*9.8cos37 Fn=23.4 3*9.8sin37-us(23.5)=0 us=.743
*Wednesday, October 27, 2010 at 8:40pm by help*

**phsics**

throughout a time interval, while the speed of a particle increases as it moves along the x-axis, its velocity and acceleration might be: a) positive and negative B) negative and negative c) negative and positive D) negative and zero E) positive and zero
*Monday, September 2, 2013 at 10:05pm by jack*

**phsics**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +16.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.60 m/s2. How fast is the racer moving 2.90 102 m after the parachute opens?
*Tuesday, August 23, 2011 at 7:23pm by Paul*

**phsics**

A coin with a diameter of 1.9 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 19 rad/s and rolls in a straight line without slipping. The rotation slows with an angular acceleration of magnitude 2.1 rad/s2. What is the ...
*Monday, September 27, 2010 at 4:10pm by help*

**PHSICS**

A laser beam in air is incident on a liquid at an angle of 40.0^\circ with respect to the normal. The laser beam's angle in the liquid is 25.0^\circ.What is the liquid's index of refraction? PLEASE HELP!!!
*Thursday, January 28, 2010 at 10:22am by elina*

**phsics**

The graph in Figure 10-22 shows the force and displacement of an object being pulled. Figure 10-22 (a) Calculate the work done to pull the object 7.0 m. 1150 J (b) Calculate the power that would be developed if the work was done in 2.4 s. Enter a number.2 W
*Wednesday, December 9, 2009 at 3:07pm by Manny Aragon*

**phsics**

A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 32.0 m above sea level, directed at an angle theta = 49.3° above the horizontal, and with a speed v = 25.8 m/s. Assuming that air friction can be...
*Wednesday, September 22, 2010 at 7:30pm by Anonymous*

**phsics**

A block is at rest on an inclined plane whose elevation can be varied. The coefficient of static friction is μs= 0.4, and the coefficient of kinetic friction is μk = 0.16. The angle of elevation θ is increased slowly from the horizontal. At what value of θ ...
*Sunday, October 24, 2010 at 11:33pm by help*

**phsics**

A student of weight 830 N was sent to another planet called Nerdland. If Nerdland has a mass that is three times the mass of the earth and a radius that is half the radius of the earth, what would be the mass in kg of the student when on Nerdland?
*Tuesday, September 6, 2011 at 11:43pm by Elisabeth*

**phsics**

The change in Wt. that you experience when on a different planet is not caused by a change in your mass. Your mass is constant. The change in wt. is caused by the change in gravity(g).
*Tuesday, September 6, 2011 at 11:43pm by Henry*

**phsics**

a car moving with an initial velocity of 60 m/s south has a constant acceleration of 10 m/s^2 north. After 12 seconds its velocity will be: A) 60 m/s south B)60 m/s north C) 40 m/s north D) 40 m/s south
*Monday, September 2, 2013 at 10:13pm by jack*

**phsics**

A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 32.0 m above sea level, directed at an angle theta = 49.3° above the horizontal, and with a speed v = 25.8 m/s. Assuming that air friction can be...
*Thursday, September 23, 2010 at 10:39pm by Anonymous*

**termodynamic/phsics**

What characteristics should solar collectors have, to function in an optimal way? Why should these properties be fulfilled? If there is a water flow of 500 g / minute to a solar panel on one m2, how much water is heated up under optimal conditions during the passage of the ...
*Thursday, January 6, 2011 at 3:55am by adam*

**phsics**

I think you need a real tutor. Every question you submit, has been responded to with directions, yet you keep coming back saying you dont understand. I have reread some of my responses, putting them in to algebra I terms for you to finish, yet you say you dont understand. At ...
*Wednesday, September 22, 2010 at 9:24pm by bobpursley*

**Physics **

In a phsics experiment, a 1.3 kg dynamics cart is placed on a ramp inclined at 25 degrees to the horizontal. the cart is initially at rest but is then pulled up the ramp with a force sensor. the force sensor exerts a force on the cart parallel to the ramp. negligible friction ...
*Tuesday, October 1, 2013 at 6:58pm by Lola*

**Physics **

In a phsics experiment, a 1.3 kg dynamics cart is placed on a ramp inclined at 25 degrees to the horizontal. the cart is initially at rest but is then pulled up the ramp with a force sensor. the force sensor exerts a force on the cart parallel to the ramp. negligible friction ...
*Tuesday, October 1, 2013 at 6:58pm by Lola*

**phsics**

Use the following formula and solve for Vf Vf=Vi+at Where Vf=? Vi=60m/s a=-10m/s^2 t=12s **Since the acceleration is in the opposite direction of the velocity, acceleration is negative. Vf=60m/s+[(-10m/s^2)(12s)] Vf=-60m/s Velocity is in the opposite direction, then velocity ...
*Monday, September 2, 2013 at 10:13pm by Devron*

**PHSICS**

1. How much kinetic energy does a 1 kg ball have if it has a velocity of 10 m/s? Choose one answer.and explain a. 100 J. b. 50 J. c. 10 J. d. 5 J. 2. You have the grand idea that the science building would be better situated if you moved it North by 4 meters. To accomplish ...
*Saturday, September 22, 2012 at 9:07pm by Anonymous*

**phsics**

A charged particle is moving in a uniform magnetic field. Which of the following statements concerning the magnetic force exerted on the particle is false? A) It does not change the kinetic energy of the particle. B) It can act only on a particle in motion. C) It increases the...
*Monday, April 2, 2007 at 9:20pm by benton*

**phsics**

Two materials, for example silver and copper, of same cross section can be welded into a composite wire. When a voltage is applied across this wire, a stable current i whose value is determined by Ohm¡¦s Law is formed. Since the wire has uniform cross section, the current ...
*Thursday, October 4, 2012 at 3:36pm by lam*

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