April 24, 2014

Search: physcis

Number of results: 57

Physcis - Planets
How could you discover a planet without seeing it with a telescope?
Monday, August 23, 2010 at 7:41am by Shaila

use the principle of an incline plane and derive the coeffecient of stationary friction
Tuesday, June 28, 2011 at 6:43pm by merry light

A car accelerates from rest at 4.9 m/s2. How much time does it need to attain a speed of 6 m/s?
Sunday, September 18, 2011 at 11:56am by Chloe

equation of nuclear fission of urnaium 235 forming iodine 131
Monday, October 31, 2011 at 4:08am by Anonymous

Calculate the total energy of 2.0 kg object moving horizontally at 10 m/sec 50 meters above the surface.
Thursday, January 6, 2011 at 11:24am by Nallely

What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is 0.82?
Monday, May 7, 2012 at 10:29pm by ericka

In the figure below find the electric potential at point P due to the grouping of charges at the other comers of the rectangle. Q1= 8.0 uc Q2=-8.0 uc Q3= -12.0 uc
Wednesday, April 13, 2011 at 12:55pm by c harlene

A soccer ball kicked with a force of 14.8 N accelerates at 6 m/s2 to the right. What is the mass of the ball?
Tuesday, November 13, 2012 at 8:10am by Brett

A soccer ball kicked with a force of 14.8 N accelerates at 6 m/s2 to the right. What is the mass of the ball?
Tuesday, November 13, 2012 at 8:10am by Brett

can we only have uniform electric field in flux only
Wednesday, August 18, 2010 at 12:58am by blasting

Physcis -wavelets and wavefronts
Describe how the wavelets that form in the wavefront apparently vanish behind it?
Monday, November 1, 2010 at 8:25am by Farah

a 16990kg airplane lands with a speed of 91m/s on a stationary aircraft carrier deck that is 115m. find workk done by nonconservative forces in stopping the plan.
Friday, March 26, 2010 at 4:44pm by brittney

Calculate the ratio of Rydberg value for doubly ionized lithium, a one electron atom with a nucleus of charge 3e, to that of hydrogen? Include the reduced mass effect for Li++ in your calculations.
Sunday, April 13, 2014 at 5:36pm by help pls

a black of mass 92 kg and volume 0.031 lies at the bottom of the sea how much force is needed to lift it ? take 1.03*10^3 kg/m as the density of sea water
Saturday, September 7, 2013 at 7:39am by eman

a flag pole is 1ooft from an observer who sights the top of the flag pole to be at an angle of 50 degrees from the horizontal. How high is the flagpole
Sunday, September 23, 2007 at 7:44pm by Casandra

help physcis
At what cold-reservoir temperature (in degree C) would a Carnot engine with a hot-reservoir temperature of 350degree C have an efficiency of 70%?
Tuesday, March 30, 2010 at 8:29pm by Naso

Two trucks approach at the same speed and undergo an inelastic collision. Their total momentum? a. becomes zero b. remains unchanged c. doubles d. I need to know the masses of the two cars I say B.
Sunday, April 12, 2009 at 12:52am by Jacob

Determine the acceleration of the marble from the straight line equation you calculated in question 2. So the equation i found in Q2 was y=9.84x+6.79 How do i figure out acceleration from this? please help!
Saturday, November 5, 2011 at 7:32pm by Anonymous

Physcis - Wavefront and wavelets
Describe how the wavelets that form in the wavefront apparently vanish behind it?
Wednesday, November 3, 2010 at 4:22pm by Farah

A 2520 kg demolition ball swings at the end of a 23.9 m cable on the arc of a vertical circle. At the lowest point of the swing, the ball is moving at a speed of 8.97 m/s. Determine the tension in the cable.
Sunday, February 19, 2012 at 2:03pm by KayLyn

biker passes a lamppost at the crest of a hill at + 4.5 m/s. she acceleratets down the hill at a constant rate of +0.40 ,/s2 for 12 seconds.\ how far does she move down the hill during this time?..
Tuesday, September 18, 2012 at 11:13pm by miguel

Two astronaut, as shown in the figure, each having a mass of 62.0 kg, are connected by a 12.00 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.00 m/s. Treating the astronauts as particles, calculate...
Monday, November 12, 2012 at 3:43pm by Anonymous

a particle moving at a velocity of 6 m/s in the positive x direction is given an acceleration of 3.9m/s^2 in the positive Y direction for 3.4s. what is the final speed of the particle? answer in units of m/s
Saturday, December 11, 2010 at 12:57am by vanessa

Physcis 1
A muscle builder holds the ends of a massless rope. At the center of the rope, a 7.9-kg ball is hung. Each end of the rope subsequently makes an angle of È with the horizontal. What is the tension in the rope if the angle È is 6.0°?
Thursday, February 10, 2011 at 7:56pm by April

I dont rember exactly the question. its about average velocity. A person travel 400 meter, he complete 4 ROUNDS at 60 sec,57SEC,55SEC AND 53 sec.what if average velocity?
Sunday, July 25, 2010 at 1:12pm by Sham

you can close a door by pushing on the door anywhere except directly on the hinge. In each case you do exactly the same amount of work. Why does it seem harder to close thedoor if you push it cose to the hinge.?
Wednesday, October 15, 2008 at 12:39pm by Anonymous

A spring of negligible mass stretches 2.20 cm from its relaxed length when a force of 10.50 N is applied. A 1.100 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the origin to x=5.0 cm and ...
Monday, November 26, 2012 at 6:11pm by Anonymous

A stone is shown at rest on the ground a vector shows the weight of the stone. complete the vector diagram showing another vector that results in zero net force on the stone. b. what is the conventional name of the vector you have drawn
Thursday, April 7, 2011 at 9:28am by felicia

A box of books weighing 330 N is shoved across the floor of an apartment by a force of 440 N exerted downward at an angle of 35.0° below the horizontal. If the coefficient of kinetic friction between box and floor is 0.57, how long does it take to move the box 4.00 m, starting...
Thursday, September 23, 2010 at 2:49pm by Anonymous

A crane whose motoer has a power input of 5.0kW lifts a 1200-kg load of bricks through a height 30m in 90s. Find the efficency of the crane which is the ratio between its output power and its input power
Tuesday, November 15, 2011 at 7:59pm by Ania

a solid of density 5000 kgf weights 0.5 kgf in air . it is completely immersed in water of density 1000 kg m-3.calculate the apparent weight of the solid in water.
Sunday, October 20, 2013 at 3:02am by ASTINA

an Ampere is the flow of 6.28 X 10^18 electrons per second past a fixed point in a conductor. how many flow past a fixed point if the current is 17.5 mA?
Sunday, September 4, 2011 at 5:04pm by Gena

In the diagram shown the pulley at frictionless and the cylindrical load weighs 800. A. Determine the tension in the cable. B. Determine the horizontal component of the reaction of the pin A. C. Determine the vertical component of the reaction of the pin A.
Thursday, February 3, 2011 at 8:00am by ali

Physcis - scientifc models and theories.
a) Do you believe that some current accepted scientific models or theories might be held in high regard because of the structure of the scientists who proposed them? b) Suggest on possible model or theory that is currently accepted by a majority of people that you feel might ...
Monday, November 1, 2010 at 8:24am by Farah

Physcis - scientifc models and theories.
a) Do you believe that some current accepted scientific models or theories might be held in high regard because of the structure of the scientists who proposed them? b) Suggest on possible model or theory that is currently accepted by a majority of people that you feel might ...
Wednesday, November 3, 2010 at 4:23pm by Farah

physcis problem ,please help
A resistance in a circuit is 470§Ù ¡¾ 10%. When a meter with a full-scale voltage of 25V and error of ¡¾ 3% is used to measure the voltage across the resistance, the voltage was read as 12V. Obtain the power across the resistance and determine its error.
Saturday, July 24, 2010 at 12:30pm by ong

need help with physcis vector problem Using combining vectors to find displacement problem(BEST answer)? tourist on a jet ski move 1.2km 55 degrees North of E and then 3.15km 70 degrees south of east. determine the jet ski's displacement.
Monday, March 1, 2010 at 9:48pm by jake

A 100.0 kg base runner begins his slide into second base when he is moving at a speed of 4.70 m/s. The coefficient of friction between his clothes and Earth is 0.550. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to...
Wednesday, October 10, 2012 at 8:40pm by Anonymous

A painter climbs a ladder leaning against a smooth wall. At a certain height, the ladder is on the verge of slipping. Let the mass of the painter be 85.0 kg, length = 5.80 m, the ladder’s mass to be 37.0 kg, è = 51.0°, and the coefficient of friction between ground and ladder ...
Sunday, November 11, 2012 at 6:03pm by Anonymous

Hello, I was wondering how to explain the potential energy in a Ferris wheel, and if there were any reputable (aka not something such as Wikipedia, etc) that had an explanation for this? The only thing I have gathered is that mgh=Eg and that Eg is the energy stored in the ...
Friday, November 2, 2007 at 8:39pm by Physics_For_Life_Fo_Shizzle

reviews the concepts that are important in this problem. A golfer imparts a speed of 35.9 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) How much time does the ball spend in the air...
Sunday, February 19, 2012 at 1:49pm by KayLyn

Seals may cool themselves by using thermal windows, patches on their bodies with much higher than average surface temperature. Suppose a seal has a 0.030 m^2 thermal window at a temperature of 30 degree C. If the seal’s surroundings are a frosty -10 degree C, what is the net ...
Tuesday, April 6, 2010 at 11:30am by Kidda

An airplane flying at 120km/h due west moves into a region where the wind is blowing at 40km/h due east. If the plane's original vecotr velocity is Vplane, what is the expression for the plane's resulting velocity in terms of Vplane. a. 1/3 >Vplane b. 2/3>Vplane c.1 ...
Saturday, September 18, 2010 at 8:40pm by Josh

physcis ! HELP !!!!
which of collowing situations describe a particle that might have a non-zero velocity? canbe more than one A) a particle that has a constant position as a function of time B) a particle that has its position changing as a fnction of time c)when you graph the particle's ...
Tuesday, April 10, 2012 at 6:00pm by kelly

On a banked race track, the smallest circular path on which cars can move has a radius of 113 m, while the largest has a radius of 160 m, as the drawing illustrates. The height of the outer wall is 14.4 m. Find (a) the smallest and (b) the largest speed at which cars can move ...
Thursday, February 24, 2011 at 10:05pm by john

During a ski race, Kate uniformly accelerated at 3.15m/s^2 for 100meters. She then maintained this velocity for another 100m. she then uniformly decelerated at 6m/s^2 for 2 seconds. she accelerates back to her maximum velocity over the next 200meters in 16 seconds. she then ...
Thursday, March 4, 2010 at 7:16pm by jake

In the process of starting up the car plant, a turbine accelerates from rest at 0.49 rad/s^2 .How long does it take to reach its 4400 rpm operating speed? How many revolutions does it make during this time? I got 940 s for the first part, but for the second part Do i use the ...
Thursday, April 16, 2009 at 7:03pm by Sandy

Boat A negotiates a curve whose radius is 375 m. Boat B negotiates a curve whose radius is 150 m. Each boat experiences the same centripetal acceleration. What is the ratio of the speed of boat A to that of boat B?
Sunday, February 19, 2012 at 2:04pm by KayLyn

After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 35.5 m horizontally from the end of the ramp. His velocity, just before landing, is 18.5 m/s and points in a direction 43.2 ° below the horizontal. Neglecting air resistance and any ...
Sunday, February 19, 2012 at 1:50pm by KayLyn

Doogleberry Physcis
In an L-R-C series circuit, the resistance is 380 Ohms, the inductance is 0.400 H, and the capacitance is 2.00×10−2 uF. What is the resonant frequency of the circuit? (omega naught) The capacitor can withstand a peak voltage of 570 volts. If the voltage source operates ...
Sunday, September 23, 2012 at 4:46am by Doogleberry

in order to determine the width of a river, a base line of 100 ft is marked off on one side. On the other side of the river is a large rock. When sighted from each end of the base line it is found that the lines of sight make angles of 60 degrees and 75 degrees, respecively, ...
Sunday, September 23, 2007 at 7:48pm by Casandra

a flight attendant pulls her 70 kg flight bag in an airport terminal holding the handle 50 degrees above the horizontal. she pulls the bag a distance of 200 m while exerting a 40 n force acting along the handle with a constant speed how much work does the flight attendant ...
Saturday, October 20, 2012 at 9:31pm by chad

how can i graph this scenario a hawk flies north 5 miles in 5 min. it turns around and flies south 3 miles in 3 min, then turns back around and flies north 2 miles in 2 min.
Tuesday, October 8, 2013 at 10:30pm by Anonymous

Physcis(Please help)
A pilot flies her route in two straight-line segments. The displacement vector A for the first segment has a magnitude of 254 km and a direction 30.0o north of east. The displacement vector for the second segment has a magnitude of 178 km and a direction due west. The ...
Sunday, May 27, 2012 at 1:52pm by Hannah

A beam resting on two pivots has a length of L = 9.00 m and mass M =81.0 kg. The pivot under the left end exerts a normal force n1 on the beam, and the second pivot placed a distance 4.00 m from the left end exerts a normal force n2. A woman of mass m= 43.0 kg steps onto the ...
Sunday, November 11, 2012 at 4:53pm by Anonymous

An object slides without friction in a bowl shaped like a hemisphere. It is released from rest at one edge of the bowl, slides up the other side before stopping right on the edge of the bowl. During which part of this process is the power being delivered by the gravitational ...
Wednesday, June 22, 2011 at 12:40am by Casey

Physcis 30
Q1) If there are 100 radioactive atoms with a half-life of 30 seconds, how many radioactive atoms will remain after one half-life (30 seconds)? How many will remain after two half-lives (60 seconds)? Three half-lives? So basically, after 30 seconds it will be 50.After 60 sec. ...
Thursday, January 6, 2011 at 11:13am by Marium

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