Wednesday

April 23, 2014

April 23, 2014

Number of results: 39

**physicsss**

see other post.
*Sunday, October 31, 2010 at 5:32pm by bobpursley*

**PHYSICSSS**

No figure or description was provided
*Sunday, February 12, 2012 at 12:59am by drwls*

**Physicsss**

numbervirus=volume coughed*E-9/(4PI(d/2)^3
*Saturday, September 10, 2011 at 6:49pm by bobpursley*

**PHYSICSSS please helppp ASAP**

I will be happy to critique your thinking.
*Sunday, February 12, 2012 at 6:23pm by bobpursley*

**PHYSICSSS!**

I am not going to do it for you. I will be happy to critique your work. I am getting the idea that you are answer grazing.
*Tuesday, September 21, 2010 at 8:39am by bobpursley*

**Physicsss**

can you please explain that answer a little bit more because i really need to get this question right
*Saturday, September 10, 2011 at 6:49pm by Unknown*

**PHYSICSSSSS helpppp please**

Two boxes with different masses M1 = 1.8 kg and M2 = 2.6 kg are tied together on a frictionless ramp surface which makes an angle θ = 21° with the horizontal (see the figure below). What is the tension in the rope connecting the two boxes? N What is the tension in the ...
*Sunday, February 12, 2012 at 2:03pm by Anonymous*

**PHYSICSSS**

There was a ramp the two box where sliding toward to left seems like a 45 degree angle n first is m1 thn m2 does this helppp
*Sunday, February 12, 2012 at 12:59am by Anonymous*

**PHYSICSSS please helppp ASAP**

I am confused if I had a think I wudnt be here askin I need to put a set up n i cud solve it myself...thnk you
*Sunday, February 12, 2012 at 6:23pm by Anonymous*

**physicsss**

5.00 m/s^2 is the acceleration rate of the passing car. Multiply it by the time interval for the velocity change/ You havew already written the correct equation. Solve if for t. t = (10 m/s)/(5 m/s^2) Your answer will be in seconds
*Tuesday, September 11, 2007 at 8:15pm by drwls*

**physicsss**

5.00 m/s^2 is the acceleration rate of the passing car. Multiply it by the time interval for the velocity change/ You havew already written the correct equation. Solve if for t. t = (10 m/s)/(5 m/s^2) Your answer will be in seconds
*Tuesday, September 11, 2007 at 8:15pm by drwls*

**physicsss**

sorry but i dont understand wat is R^2 wat does that represent? and wat is Hsun?
*Sunday, January 24, 2010 at 4:50pm by physics help!*

**physicsss**

No, not correct. Your work is nonsense. F=ma find a knowing a, a=(Vf-Vo)/time solve for time, but change Vf to m/s first.
*Sunday, October 31, 2010 at 5:32pm by bobpursley*

**physicsss**

A heavy freight train has a mass of 11800 metric tons. If the locomotive can pull with a force of 691000 N, how long does it take to increase it's speed from 0 to 70.3 km/h? 20.36=V0+5.9x10^-3 =349.1 s is this correct?
*Sunday, October 31, 2010 at 5:32pm by Jay- just need help!*

**physicsss**

A heavy freight train has a mass of 11800 metric tons. If the locomotive can pull with a force of 691000 N, how long does it take to increase it's speed from 0 to 70.3 km/h? 20.36=V0+5.9x10^-3 =349.1 s is this correct?
*Sunday, October 31, 2010 at 5:32pm by Jay- just need help!*

**physicsss**

oook but would that not be the same answer? a=(20.36-0)/ t t=20.36/.059 probably not how you rearrange it but all the other ways lead to numbers that are much too small
*Sunday, October 31, 2010 at 5:32pm by Jay- just need help!*

**PHYSICSSS**

Small rockets are used to make tiny adjustments in the speeds of satellites. One such rocket has a thrust of 35 N. If it is fired to change the velocity of a 71500 kg spacecraft by 64 cm/s, how long should it be fired?
*Monday, December 3, 2007 at 8:46pm by oliphia*

**physicsss**

A Thompson’s gazelle can reach a speed of 13 m/s in 3.0 s. A lion can reach a speed of 9.5 m/s in 1.0 s. A trout can reach a speed of 2.8 m/s in 0.12 s. Which animal has the greatest acceleration?
*Thursday, October 28, 2010 at 3:56pm by Jay*

**PHYSICSSS!**

why say such a useless comment bob? why dont you give him hint or pointers on how to start off the problem...you dont have to write out the full answers per se but dont be such an ass about it..geez
*Tuesday, September 21, 2010 at 8:39am by bobpursleysa!@#$%^&*

**physicsss**

A cable attached to a block of mass 11 kg pulls the block along a horizontal floor at a constant velocity. If the tension in the cable is 5.3 N, what is the coefficient of kinetic friction between the block and the floor?
*Saturday, February 14, 2009 at 12:42am by kj*

**PHYSICSSS**

While an elevator of mass 2681 kg moves upward, the tension in the cable is 29.4 kN. (a) What is the acceleration of the elevator? (b) If at some point in the motion the velocity of the elevator is 1.04 m/s upward, what is the elevator's velocity 3.96 s later?
*Saturday, February 11, 2012 at 11:35pm by Anonymous*

**PHYSICSSS HELP PLEASE**

A crate of potatoes of mass 9.0 kg is on a ramp with angle of incline 30° to the horizontal. The coefficients of friction are μs = 0.69 and μk = 0.41. Find the frictional force (magnitude and direction) on the crate if the crate is at rest. magnitude N direction
*Monday, February 13, 2012 at 12:02am by Anonymous*

**PHYSICSSS**

Thrust x time, also known as "impulse", must equal the momentum change desired. In your case the momentum change required is 7.15*10^4 kg * 0.64 m/s = 4.58*10^4 kg m/s Set this equal to 35 Newtons * T and solve for T. It will be in seconds
*Monday, December 3, 2007 at 8:46pm by drwls*

**PHYSICSSS please helppp ASAP**

A 9.5-kg watermelon and a 7.2-kg pumpkin are attached to each other via a cord that wraps over a pulley, as shown. Friction is negligible everywhere in this system. (a) Find the accelerations of the pumpkin and the watermelon. Specify magnitude and direction. magnitude ...
*Sunday, February 12, 2012 at 6:23pm by Anonymous*

**Physicsss**

A typical virus is a packet of protein and DNA (or RNA) and can be spherical in shape. The influenza A virus is a spherical virus that has a diameter of 85 nm. If the volume of saliva coughed onto you by your friend with the flu is 0.023 cm3 and 10−9 of that volume ...
*Saturday, September 10, 2011 at 6:49pm by Unknown*

**PHYSICSSS PLEASE HELP ANYONE**

A 9.5-kg watermelon and a 7.2-kg pumpkin are attached to each other via a cord that wraps over a pulley, as shown. Friction is negligible everywhere in this system. Pumpkin is at left of angle n is 53 degrees and watermelon is on right and at 30 degrees calculate acceleration ...
*Sunday, February 12, 2012 at 8:50pm by Anonymous*

**physicsss**

distance = rate*time time for first hallway is time = distance/rate = 35.0/3.50 = ?? Do time for second hallway and third hallway the same, add the times together, and see if the total adds to more than 1 minute (the difference between 10:29 and 10:30).
*Tuesday, September 11, 2007 at 8:27pm by DrBob222*

**physicsss**

given (young's double slit experiment the slit separation is 0.08mm and the slits distance to the screen is 1.6 m. the central maxima has intensity Imax and the light has a wavelength of 6nm. the separation of the fringes was found to be 12mm near the center of the screen. ...
*Thursday, November 13, 2008 at 8:04pm by Kimora*

**PHYSICSSS**

Two boxes with different masses M1 = 1.8 kg and M2 = 2.6 kg are tied together on a frictionless ramp surface which makes an angle θ = 21° with the horizontal (see the figure below). What is the tension in the rope connecting the two boxes? N What is the tension in the ...
*Saturday, February 11, 2012 at 11:37pm by Anonymous*

**PHYSICSSS**

Two boxes with different masses M1 = 1.8 kg and M2 = 2.6 kg are tied together on a frictionless ramp surface which makes an angle θ = 21° with the horizontal (see the figure below). What is the tension in the rope connecting the two boxes? N What is the tension in the ...
*Sunday, February 12, 2012 at 12:59am by Anonymous*

**PHYSICSSS!**

A brass lid screws tightly onto a glass jar at 20 oC. To help open the jar, it can be placed into a bath of hot water. After this treatment, the temperature of the lid and the jar are both 60 oC. The inside diameter of the lid is 8.0 cm at 20 oC. Find the size of the gap (...
*Tuesday, September 21, 2010 at 8:39am by JT*

**physicsss ;o**

a 12 V car battery is found to be capable of storing 2.0 kW*h of eletrical energy. for a certain eletric car, it is necessary to develop 10 kW of power to drive at 20 km/h. a)suppose that the car has 10 such batteries. how long(hours)could it run if all 10 of them released all...
*Tuesday, December 13, 2011 at 7:25pm by monee'*

**PHYSICSSS**

A train engine pulls out of a station along a straight horizontal track with five identical freight cars behind it, each of which weighs 88.0 kN. The train reaches a speed of 13.0 m/s within 6.50 min of starting out. Assuming the engine pulls with a constant force during this ...
*Saturday, February 11, 2012 at 11:36pm by Anonymous*

**Physicsss**

A planet has two satellite moons. Moon X has an orbital period of 2.13 days. Moon Y has an orbital period of about 3.53 days. Both moons have nearly circular orbits. Use Kepler's third law to find the distance of each satellite from the planet's center. The planet's mass is 2....
*Friday, February 17, 2012 at 4:36pm by Angelina*

**PHYSICSSS HELP PLEASE**

Wc = mg = 9kg * 9.8N/kg = 88.2 N. = Wt. of crate. Fc = 88.2 N. @ 30 Deg.=Force of crate. Fp = 88.2*sin30 = 44.1 N. = Force parallel to ramp. Fv = 88.2*cos30 = 76.4 N. = Force perpendicular to ramp. Fs = 0.69*76.4 = 52.7 N.,up. = Force of static friction. Fk = 0.41*76.4 = 31.3 ...
*Monday, February 13, 2012 at 12:02am by Henry*

**Physicsss helppp pleaseee**

A helicopter is lifting two crates simultaneously. One crate with a mass of 151 kg is attached to the helicopter by cable A. The second crate with a mass of 79 kg is hanging below the first crate and attached to the first crate by cable B. As the helicopter accelerates upward ...
*Sunday, February 12, 2012 at 3:26pm by Anonymous*

**physicsss**

It is now 10:29a.m, but when the bell rings at 10:30a.m. Suzete will be late for french class for the third time this week. She must get from one side of the school to the other by hurring down three different hallways. She runs down the first hallway, a distance of 35.0m at a...
*Tuesday, September 11, 2007 at 8:27pm by confusedd!HELPP!!!*

**physicsss**

while driving his sports car at 20.0 m/s down a four-lane highway, eddie comes up behind a slow-moving dump truck and decides to pass it in the left lane. If eddie can accelerate at 5.00 m/s2) (squared) how long will it take for him to reach a speed of 30.0 m/s? i know its ...
*Tuesday, September 11, 2007 at 8:15pm by confusedd!HELPP!!!*

**physicsss**

Phobos is the larger and closer of Mars’s two moons. It has no atmosphere, a mean radius of 11 km, an albedo of 0.07, and an emissivity of 1.0. (i) Assuming that the radiative temperature of Phobos is 222 K and that it is spherical, what is its mean distance from the sun? (ii...
*Sunday, January 24, 2010 at 4:50pm by physics help!*

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