Saturday
May 23, 2015

Homework Help: Science: Physics

Recent Homework Questions About Physics

physics
A 4.40kg bucket of water is accelerated upward by a cord of negligible mass whose breaking strength is 74.0N
Monday, March 2, 2015 at 7:34pm

Calculus Physics
Imagine a spaceship on its way to the moon from the earth. Find the point, as measured from the center of the earth, where the force of gravity due to the earth is balanced exactly by the gravity of the moon. This point lies on a line between the centers of the earth and the ...
Monday, March 2, 2015 at 7:11pm

Calculus Physics
A glass of orange juice is on the floor of a subway car traveling along a straight path at constant velocity. Everything's fine. The coefficient of static friction between the glass and the floor is 0.32. The subway suddenly accelerates forward. What is the maximum ...
Monday, March 2, 2015 at 7:09pm

Physics
Analyze the flight of a projectile moving under the influence of gravity (mg) and linear, i.e., laminar- flow drag (fD = bv, with b > 0 constant). Neglect \Phase I"; assume the projectile is launched from the origin at speed v1 and angle 1 above the horizontal. WARNING...
Monday, March 2, 2015 at 4:54pm

Physics
A 100kg object moving at 20 m/s comes to a stop over distance of 40 m. What is the coefficient of dynamic fiction between the object and the ground? I tried to work it out with the formula, but I'm really confused. Please help.
Monday, March 2, 2015 at 4:52pm

physics
The largest tension that can be sustained by a stretched string of linear mass density μ, even in principle, is given by τ = μc2, where c is the speed of light in vacuum. (This is an enormous value. The breaking tensions of all ordinary materials are about 12 ...
Monday, March 2, 2015 at 3:51pm

Physics
An outdoor swimming pool contains 100000 kilogram of water how much energy is needed yo heat water from 15 celius to 20 celius
Monday, March 2, 2015 at 2:54pm

physics
Heat can never flow from ________. how come it is cold to hot?
Monday, March 2, 2015 at 2:04pm

Basic Physics
There is a rocket on a stage connected a spring with the spring constant k(N/m). The weights of the rocket and the stage are m(kg) and M(kg), respectively. The length of the spring without the stage and rocket or free is h0(m) and it becomes shrunk to h(m) on putting the ...
Monday, March 2, 2015 at 1:07pm

help! Physics
I've been getting this question wrong so many times! What is the relationship between the coefficient of friction and the time that it takes the object to reach the bottom of the ramp?
Monday, March 2, 2015 at 10:32am

modern physics
a hunter on the ground fires a bullet in the northeast direction which strikes a deer 0.25 metre away from him, the bullet travel with a speed of 1800m/hr.at the instant an airplane is directly over the hunter at an altitude of one metre and is traveling due east with a ...
Sunday, March 1, 2015 at 11:48pm

Physics
A baseball pitcher delivers a fastball that crosses the plate with an angle of 7.89 degrees relative to the horizontal and a speed of 87.5 mph. The ball (mass 0.145 kg) is hit back over the head of the pitcher at an angle of 38.03 degrees with respect to the horizontal and a ...
Sunday, March 1, 2015 at 11:21pm

physics
A seesaw has a mass of 30 kg, a length of 3.0 m, and fulcrum beneath its midpoint. It is balanced when a 50-kg person sits on one end and a 65-kg person sits on the other end.Locate the center of mass of the seesaw (a distance from the 50-kg person)
Sunday, March 1, 2015 at 11:04pm

physics
A particle moves half distance by 20 m/s and stay half distance moves by 30 m/s. Average speed of total journey should be?
Sunday, March 1, 2015 at 10:59pm

Physics
A 7.5 kg box is on a table. What is the normal force acting on the box in each of the following situations? a) You leave the box alone. b) You push down on the box with a force if 20 N. c) You pull up on the box with a force of 20 N.
Sunday, March 1, 2015 at 8:02pm

Physics
A top is a toy that is made to spin on its pointed end by pulling on a string wrapped around the body of the top. The string has a length of 80 cm and is wound around the top at a spot where its radius is 2.0 cm. The thickness of the string is negligible. The top is initially ...
Sunday, March 1, 2015 at 8:01pm

Physics
A worker pushes horizontally on a 25 kg crate resting on ground level. The coefficients of static and kinetic friction are 0.4 and 0.3.? a) How much force must he apply to start the crate moving? b) After the crate has stereo moving, how much force must he apply to move the ...
Sunday, March 1, 2015 at 7:57pm

Physics
A 24.8-g bullet is fired from a rifle. It takes 2.15 × 10-3 s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 778 m/s. Assuming that the acceleration of the bullet is constant, find the average net force exerted on the bullet.
Sunday, March 1, 2015 at 7:42pm

Physics
The brakes of a truck cause it to slow down by applying a retarding force of 7760 N to the truck over a distance of 870 m. What is the work done by this force on the truck?
Sunday, March 1, 2015 at 7:41pm

physics
A 100kg shot putter is putting a shot 4kg. Just before he releases the shot, he is in the air (feet are off the ground). At this instant, the only force he exerts against the shot is an 800N horizontal force directed forward. a-what is his horizontal acceleration at this ...
Sunday, March 1, 2015 at 7:26pm

physics
a jeepney from rest accelerates unit fromly covers the time 3.25s. and covers in 15m. Determine the acxeleration of jeepney
Sunday, March 1, 2015 at 7:09pm

Physics
There is an 8 meter tall hill with a circular radius of 20 meters. What is yhe minimum speed a car needs to momentarily lose contact with the road?
Sunday, March 1, 2015 at 7:01pm

Physics
What is the final temperature reached by the addition of 11.4 grams of steam at 100C to 681 grams water at 25C in an aluminum calorimeter having a mass of 781 grams? C of water=1 cal/gc C of aluminum= 0.22 cal/gc L steam= 540cal/g My Attempt Qloss=Qgain Qst+Qhw=Qcup+Qcw ml+mcT...
Sunday, March 1, 2015 at 6:52pm

physics
Grant accelerates a 1kg ball 5.0m/s2 horizontally. The vertical acceleration of the ball is zero. The force of gravity is the only external force acting on the ball other than the forces Grant exerts on it. a-How large is the horizontal force grant exerts on the ball at this ...
Sunday, March 1, 2015 at 6:34pm

Physics
An unstable nucleus with a mass of 18.0 ✕ 10-27 kg initially at rest disintegrates into three particles. One of the particles, of mass 4.1 ✕ 10-27 kg, moves along the positive y-axis with a speed of 8.0 ✕ 106 m/s. Another particle, of mass 7.7 ✕ 10-...
Sunday, March 1, 2015 at 4:09pm

Physics 1
In recent years, scientists have discovered hundreds of planets orbiting other stars. Some of these planets are in orbits that are similar to that of earth, which orbits the sun (Msun = 1.99 × 10^(30) kg) at a distance of 1.50 × 10^(11) m, called 1 astronomical ...
Sunday, March 1, 2015 at 3:47pm

physics(urgent answer pls)
A projectile is launched with 30m/s at an angle of 60degree with d horizontal (a) find d position of the projectile,and d magnitude and direction of its velocity at t=2s (b) find d time when d ball reaches the highest point (c) find d horizontal range
Sunday, March 1, 2015 at 2:37pm

physics
A projectile is launched with 30m/s at an angle of 60degree with d horizontal (a) find d position of the projectile,and d magnitude and direction of its velocity at t=2s (b) find d time when d ball reaches the highest point (c) find d horizontal range
Sunday, March 1, 2015 at 1:53pm

Physics
A group of soldiers hid at the bottom and against the wall of a 100 m. high cliff. Unknown to them, the Evil rebels have positioned a cannon on top of the cliff; 8,000 m. from the edge. If the cannon has a muzzle speed of 320 m/sec, how close to the bottom edge of the cliff ...
Sunday, March 1, 2015 at 9:09am

physics
a block of ice slides down a 45degree inclined plane in twice the time it takes to slide down a 45degree frictionless inclined plane. what is the coefficient of kinetic friction between the ice block and the plane?
Sunday, March 1, 2015 at 8:47am

physics
a block of ice slides down a 45degree inclined plane in twice the time it takes to slide down a 45degree frictionless inclined plane. what is the coefficient of kinetic friction between the ice block and the plane?
Sunday, March 1, 2015 at 8:46am

physics
A car has a uniform velocity of 108km/h. How far does it travel in 1/2 min
Sunday, March 1, 2015 at 6:31am

physics
Why do you think the wave aspect of light was discovered earlier than its particle aspect?
Sunday, March 1, 2015 at 2:17am

physics
A bug starts walking away from the top of a spherical ball of ice and will start to slip when the normal force exerted on it drops to 1/2 of its weight. If the ice ball has a diameter of 34 cm, how far can the bug walk before it begins to slip?
Sunday, March 1, 2015 at 1:06am

Physics
A model helicopter and its load have a combined mass of 3.5 kg. Find the upward average force, in Newtons, exerted by the air if the helicopter is originally moving downward at 10 m/s and is brought to rest with constant acceleration in a distance of 50 m.
Sunday, March 1, 2015 at 1:05am

Physics
Three cylindrical blocks x, y and z are made of different materials of densities 2g/cm3, 5g/cm3 and 10g/cm3 respectively. If the side of each block resting on a level surface has an area of 2cm2, 4cm2 and 6cm2 and the height of block x is 10cm calculate; 1) weight of block x 2...
Saturday, February 28, 2015 at 11:08pm

Physics
A 4.1 g dart is fired into a block of wood with a mass of 20.2 g. The wood block is initially at rest on a 1.2 m tall post. After the collision, the wood block and dart land 2.6 m from the base of the post. Find the initial speed of the dart.
Saturday, February 28, 2015 at 9:10pm

Physics
An unstable nucleus with a mass of 18.0 ✕ 10-27 kg initially at rest disintegrates into three particles. One of the particles, of mass 4.1 ✕ 10-27 kg, moves along the positive y-axis with a speed of 8.0 ✕ 106 m/s. Another particle, of mass 7.7 ✕ 10-...
Saturday, February 28, 2015 at 9:06pm

physics
A 2200 kg car traveling at 8.7 m/s collides with a 2750 kg car that is initially at rest at the stoplight. The cars stick together and move 2.00 m before friction causes them to stop. Determine the coefficient of kinetic friction between the cars and the road, assuming that ...
Saturday, February 28, 2015 at 8:10pm

physics
A 39-turn circular coil of wire has a diameter of 1.2m. It is placed with its axis along the direction of the Earth's magnetic field of 58μT at 52° below the horizontal, and then in 0.16s it is flipped 180°. a) What is volts the magnitude of the average ...
Saturday, February 28, 2015 at 8:05pm

physics
a rectangular loop with a=6.0 cm, and b=4.0 cm, moving with a velocity v=8.0 cm/s into an area where the magnetic field is uniform, pointing into the page, and whose magnitude is B= 440 mT. a) What is in volts the induced emf in the loop when the loop is moving in a region ...
Saturday, February 28, 2015 at 8:03pm

physics
A 3.49 kg mud ball has a perfectly inelastic collision with a second mud ball that is initially at rest. The composite system moves with a speed equal to one-seventh the original speed of the 3.49 mud ball. What is the mass of the second mud ball?
Saturday, February 28, 2015 at 6:58pm

Physics
Two boats are heading away from shore. Boat 1 heads due north at a speed of 4 m/s relative to the shore. Relative to boat 1, boat 2 is moving 35° north of east at a speed of 1.2 m/s. A passenger on boat 2 walks due east across the deck at a speed of 1.3 m/s relative to ...
Saturday, February 28, 2015 at 3:34pm

Physics
An airplane is flying with a velocity of 248 m/s at an angle of 30.0° with the horizontal, as the drawing shows. When the altitude of the plane is 2.5 km, a flare is released from the plane. The flare hits the target on the ground. What is the angle θ?
Saturday, February 28, 2015 at 3:33pm

Physics
A fire hose ejects a stream of water at an angle of 30.9° above the horizontal. The water leaves the nozzle with a speed of 26.5 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the highest possible fire?
Saturday, February 28, 2015 at 3:33pm

Physics
Can someone help me with this problem? It requires a lot of visualizing and I've never been great at problems like that. A pair of blocks of mass m1 =29.0 kg, and m2 =58.0 kg, are being pushed on a horizontal surface by a constant forces of magnitude F=87.0 N. The angle &#...
Saturday, February 28, 2015 at 3:21pm

Physics
A 42 kg man stands on a bathroom scale in an elevator. Starting from rest at the bottom floor, the elevator ascends, attaining its maximum speed of 1.95 m/s in 1.22 s. It travels with this constant speed for the next 7.80 s. The elevator then slows down for 2.20 s and comes ...
Saturday, February 28, 2015 at 2:41pm

Physics
Hey, I'm studying for my physics class, and I'm not sure how to solve this problem. Can someone walk me through it please? I'd really appreciate any help! John throws a baseball from the edge of a cliff with an initial velocity of 17.0 m/s at an angle 27.0° ...
Saturday, February 28, 2015 at 1:52pm

Physics
In diving to a depth of 785 m, an elephant seal also moves 410 m due east of his starting point. What is the magnitude of the seal's displacement?
Saturday, February 28, 2015 at 1:45pm

Physics
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.050 s, during which time it experiences an acceleration of 380 m/s2. The ball is launched at an angle of 51° above the ground. Determine the horizontal and ...
Saturday, February 28, 2015 at 1:36pm

Physics
How will the balancing length of a potentiometer be affected if resistance in the primary cell is increased or decreased? Will the balancing length change if a resistance is introduced before the jockey ?
Saturday, February 28, 2015 at 12:14pm

Physics
A solid cylinder is pivoted at its center about a frictionless axle. A force is applied to the outer radius of 1.27 m at an angle of 30 ◦ above the tangential and exerts a force of 5 N. A second force is applied by wrapping rope around the inner radius of 0.576 m, which ...
Saturday, February 28, 2015 at 11:38am

physics
an arrow is shot into the air with an initial velocity of 100m is at elevation of 60 degree find. a the time of flight b the maximum height attained c the range
Saturday, February 28, 2015 at 10:43am

Physics
A 2302 kg block of granite is pulled up an incline that has an angle of inclination of 17.0 o with a constant speed of 2.22 m/s by a steam winch (see Figure). The coefficient of kinetic friction between the block and the incline is 0.340. How much power must be supplied by the...
Saturday, February 28, 2015 at 10:41am

physics
the water in a 0.5 km wide river is flowing at 5 m/sec from west to east. a man row a boat with a velocity of 13 m/sec in a direction of north west relative to water. find the time taken to cross the river so that man reaches exactly at same point to opposite end of the river...
Saturday, February 28, 2015 at 9:52am

physics
an anti aircraft gun fires at an elevation of 60 degree at an enemy air at 10.000 m above the ground. AE what speed must cannombe shot to hit the plane at the height (g=10m50)
Saturday, February 28, 2015 at 9:24am

physics
A rectangular loop with a=2.9 cm, and b=1.9 cm, moving with a velocity v=3.8 cm/s into an area where the magnetic field is uniform, pointing into the page, and whose magnitude is B= 450 mT. a) What is in volts the induced emf in the loop when the loop is moving in a region ...
Saturday, February 28, 2015 at 1:10am

Physics
As your vacation job, you are driving a concrete mixer (mass 3300 kg). While driving down a hill (angle α = 29° with the horizontal), suddenly, a cow steps out on the road. You hit on the brakes, and with each locked wheel leaving 24 meters of skid marks, you come to ...
Friday, February 27, 2015 at 10:26pm

Physics
A 755 N diver is standing on a platform 10.0 m above the surface of the water. What is the diver's speed when he hits the water? (disregard friction)
Friday, February 27, 2015 at 8:42pm

college physics
The builders of the pyramids used a long ramp to lift 21000-kg (21-ton) blocks. If a block rose 1.1 m in height while traveling 20 m along the ramp’s surface, how much uphill force was needed to push it up the ramp at constant velocity?
Friday, February 27, 2015 at 3:39pm

physics
A radio station, broadcasting at 89.1 MHz on the FM dial, has two transmission towers d = 40.0 m away from each other, producing signals that are completely in phase. An avid fan of this station is listening to it on her portable radio while jogging directly toward one of the ...
Friday, February 27, 2015 at 2:01pm

physics
Background: the Centaur impacts the moon with a velocity of 2.500 km/s (relative to the moon). Why is it acceptable to assume that the impact velocity will be consistent, even if the mass is not consistent? (Hint: think about the path that the vehicle approaches the moon)
Friday, February 27, 2015 at 1:58pm

physics
A motorcycle of mass 350kg has an acceleration of 3m/s when the resistance against motion is 200N.Calculate the force required
Friday, February 27, 2015 at 7:48am

physics 113
Calculate the change in internal energy of 2kg of water at 90 degree celcius when it is changed to 3:30m3 of steam at 100oC. The whole process occurs at atmospheric pressure. The latent heat of vaporization of wat
Friday, February 27, 2015 at 4:34am

physics
Two masses of 3.25 kg each, connected by a string, slide down a ramp making an angle of 31° with the horizontal. The coefficient of kinetic friction between m1 and the ramp is 0.31. The coefficient of kinetic friction between m2 and the ramp is 0.17. Find the magnitude of ...
Friday, February 27, 2015 at 12:23am

Physics
Two blocks, stacked one on top of the other, slide on a frictionless horizontal surface. The surface between the two blocks is rough, however, with a coefficient of static friction equal to 0.50. The top block has a mass of 2.6 kg, and the bottom block's mass is 4.0 kg. If...
Friday, February 27, 2015 at 12:21am

physics
PART ONE: A charge of 4.70μC is at the origin and a second charge of −2.85μC is on the positive x-axis 1.08 m from the origin. Find the magnitude of the electric field at a point P on the y-axis 0.640 m from the origin. The value of the Coulomb constant is 8.99...
Thursday, February 26, 2015 at 11:21pm

physics
Find d electrostaticforce of a q1 to other charges.express ur answer as magnitude n direction
Thursday, February 26, 2015 at 10:01pm

Physics
A solid cylinder is pivoted at its center about a frictionless axle. A force is applied to the outer radius of 1.27 m at an angle of 30 ◦ above the tangential and exerts a force of 5 N. A second force is applied by wrapping rope around the inner radius of 0.576 m, which ...
Thursday, February 26, 2015 at 8:01pm

Physics
Chelsea is tuning a piano when She discovers that G above middle C is vibrating with a higher frequency than her G tuning fork, which vibrates at 392 Hz. She plays the piano key and tuning fork at the same time and hears a beat frequency of 2.0 Hz. What is the frequency of the...
Thursday, February 26, 2015 at 7:50pm

physics
A 1-m-tall barrel is closed on top except for a thin pipe extending 5.2m up from the top. When the barrel is filled with water up to the base of the pipe (1 m deep) the water pressure on the bottom of the barrel is 10 kPa. What is the pressure on the bottom when water is added...
Thursday, February 26, 2015 at 7:44pm

Physics
Which object had more potential energy when it was lifted to a distance of 10 meters?
Thursday, February 26, 2015 at 7:19pm

physics
A small ball of mass 65 g is suspended from a string of length 53 cm and whirled in a circle lying in the horizontal plane.If the string makes an angle of 28◦ with the vertical, find the centripetal force experienced by the ball. The acceleration of gravity is 9.8 m/s 2...
Thursday, February 26, 2015 at 7:03pm

physics
The two sets of magnetic-field coils,used to form the pictures on the screen, are _______ to each other. Parallel or perpendicular
Thursday, February 26, 2015 at 6:55pm

Physics
Label as to Mechanical, Electrical, Chemical, Heat, Radiant, Nuclear energy: 1) an egg 2)fire 3)waterfall 4)sound 5)light 6)gasoline 7)lightning 8) sun's energy 9) cooking an egg
Thursday, February 26, 2015 at 6:45pm

Physics
A thin road of length 3L in bent at a right angle at a distance of 2L on y axis and L on x axis locate the center of mass if L is 1.2 meter
Thursday, February 26, 2015 at 4:44pm

Physics
A 4900kg cable car goes 350m up a hill inclined 14∘ above the horizontal. What can your learn about the work done by the cable to move car up the hill? Answer quantitatively. Ignore friction.
Thursday, February 26, 2015 at 4:36pm

Physics
A seesaw has a mass of 30 kg, a length of 3.0 m, and fulcrum beneath its midpoint. It is balanced when a 50-kg person sits on one end and a 69-kg person sits on the other end.Locate the center of mass of the seesaw (a distance from the 50-kg person).
Thursday, February 26, 2015 at 4:24pm

physics
How long does it take a plane, traveling at a constant speed of 233 m/s, to fly once around a circle whose radius is 2090 m?
Thursday, February 26, 2015 at 2:36pm

Physics 1
A sled is initially given a shove up a frictionless 37.0∘ incline. It reaches a maximum vertical height 1.45m higher than where it started at the bottom. What was its initial speed? THANKS FOR ANY HELP!
Thursday, February 26, 2015 at 2:10pm

physics
A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 330 m/s.
Thursday, February 26, 2015 at 1:39pm

physics
Two eagles fly directly toward one another, the first at 15.0 m/s and the second at 21.0 m/s. Both screech, one emitting a frequency of 3200 Hz and the other one of 3800 Hz. What frequencies do they receive if the speed of sound is 330 m/s?
Thursday, February 26, 2015 at 1:38pm

physics
Two eagles fly directly toward one another, the first at 15.0 m/s and the second at 21.0 m/s. Both screech, one emitting a frequency of 3200 Hz and the other one of 3800 Hz. What frequencies do they receive if the speed of sound is 330 m/s?
Thursday, February 26, 2015 at 1:37pm

physics
Two eagles fly directly toward one another, the first at 15.0 m/s and the second at 21.0 m/s. Both screech, one emitting a frequency of 3200 Hz and the other one of 3800 Hz. What frequencies do they receive if the speed of sound is 330 m/s?
Thursday, February 26, 2015 at 1:37pm

Physics mechanics
Car travelling speed 30 km/h stops after 8m distance through brakes.If same car moves at 60km/h. what is the stopping distance
Thursday, February 26, 2015 at 11:25am

physics
a thin rod of length 3l is bent at aright angle at adistance of l of on the x axis and at adistance of 2l on the y axis locate the center of mass with respect to the corner tale and l is1.2
Thursday, February 26, 2015 at 9:21am

physics
As part of an exercise program, a woman walks south at a speed of 2.00 m/s for 60.0 minutes. Then she turns around and walks north a distance 3000 m in 25.0 minutes. (a) What is the woman's average velocity during her entire motion? (b) What is the woman's average ...
Thursday, February 26, 2015 at 9:18am

Physics
Two men of the same mass climb the same flight of stairs. The first man climbs the stairs for 25 seconds, while the seconds person takes 35 seconds. Which man does the most work?
Thursday, February 26, 2015 at 4:58am

Physics
The drawing shows six point charges arranged in a rectangle. The value of q is 3.15 μC, and the distance d is 0.321 m. Find the total electric potential at location P, which is at the center of the rectangle.
Thursday, February 26, 2015 at 3:48am

physics 100
An aluminum wing on a passenger jet is 30 m long when its temperature is 20°C. At what temperature would the wing be 5 cm (0.05 m) shorter?
Thursday, February 26, 2015 at 2:21am

Physics
A uranium nucleus (mass 238 u, charge 92e) decays, emitting an alpha particle (mass 4 u, charge 2e) and leaving a thorium nucleus (mass 234 u, charge 90e). At the instant the alpha particle leaves the nucleus, the centers of the two are 5.5fm apart and essentially at rest. ...
Thursday, February 26, 2015 at 12:25am

physics
A mass of 337 g connected to a light spring of force constant 19.4 N/m oscillates on a horizontal, frictionless track. The amplitude of the motion is 5.4 cm. Calculate the total energy of the system. Answer in units of J.
Thursday, February 26, 2015 at 12:13am

Physics
A parallel plate capacitor has a rectangular plates with length 5cm and width 3cm. They are separated by a distance 12m and hooked up to a 20V battery A.) what is the area of each plate in m^2 B.) assuming nothing else is present on the circuit what is the potential difference...
Wednesday, February 25, 2015 at 11:05pm

Physics
An infinite,insulating sheet has a surface charge density 3.14C/m^2 the height is 12km A.) find the surface area of the Gaussian surface B.) find the total charge C.) find the total electric flux D.) use Guass's law to find the electric field at a height h=12km above the ...
Wednesday, February 25, 2015 at 10:58pm

Physics
A long insulating wire has a uniform charge density 7nC/m and r=3m away from the wire A.) surface area of the side of the Gaussian surface B.) find total charge enclosed by the Gaussian surface C.) find total electric flux D.) use Guass's law to find the electric flux at r=3m
Wednesday, February 25, 2015 at 10:54pm

physics
an astronaut is competing in mars olympic game her mass is 50 kg she will drive from tower 17 mm above a pool of water how much work in nj must she do to climb 17m
Wednesday, February 25, 2015 at 10:34pm

physics
how much work is done by the upward force of your head on a 50 N rock that you carry horizontally across a 10 m room?
Wednesday, February 25, 2015 at 9:25pm

Physics
How much work does spike do when he pulls a 50 kg sled with a force of 200 N with a rope at an angle of 30 degrees above the horizontal, 20 m?
Wednesday, February 25, 2015 at 9:25pm

physics
A supertanker with the mass of 5.55 × 108 kg is moving with a constant velocity. Its engines generate a forward thrust of 4.55 × 105 N. Determine (a) the magnitude of the resistive force exerted on the tanker by the water and (b) the magnitude of the upward buoyant...
Wednesday, February 25, 2015 at 8:09pm

Physics
A 58 kg woman is ice-skating toward the east on a frictionless frozen lake when she collides with a 94 kg man who is ice-skating toward the west. The maximum force exerted on the woman by the man during the collision is 210 N, west. Take east to be the positive direction of ...
Wednesday, February 25, 2015 at 8:00pm

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