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November 27, 2014

Homework Help: Science: Physics

Recent Homework Questions About Physics

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please help me!! physics
The masses of blocks A and B are 4.5 kg and 3.7 kg respectively. The blocks are initially at rest and are connected by a massless string passing over a massless, frictionless pulley. The system is released from rest. a. What is the acceleration of the blocks? b. What is the ...
Sunday, November 24, 2013 at 6:34pm

Physics
An X-ray binary consists of 2 stars with masses m1 (the accreting compact object) and m2 (the donor). The orbits are circular with radii r1 and r2 centered on the center of mass. (a) Find the orbital period T of the binary following the guidelines given in lectures. Express ...
Sunday, November 24, 2013 at 3:29pm

Physics
A sphere of radius r starts from rest and rolls without slipping along a curved surface, dropping through a vertical distance of 0.500 m. Find the final speed v of the sphere’s center of mass.
Sunday, November 24, 2013 at 12:51pm

Physics
A weather vane initially at rest has a moment of inertiaof 0.100 kg-m2about its axis of rotation. A 50.0 g pieceof clay is thrown at the vane and sticks to it at a point20.0 cm from the axis. The initial velocity of the clay is 15.0 m/s, directed perpendicular to the vane. ...
Sunday, November 24, 2013 at 11:41am

Physics
TORQUE, ROTATION AND TRANSLATION A Yo-Yo of mass m has an axle of radius b and a spool of radius R . Its moment of inertia about the center can be taken to be I=(1/2)mR2 and the thickness of the string can be neglected. The Yo-Yo is released from rest. You will need to assume ...
Sunday, November 24, 2013 at 11:22am

Physics
TURNTABLE SOLUTIONS A gyroscope consists of a uniform disc of mass radius M= 1 kg and radius R= 0.3 m . The disc spins with an angular speed ω= 400 rad⋅s-1 as shown in the figure below. The gyroscope precesses, with its axle at an angle 30∘ below the ...
Sunday, November 24, 2013 at 11:19am

Physics
A man lifts a luggage of 20 kg from the ground and puts it on his head 2 m above the ground. Calculate the work done by him on the luggage.
Sunday, November 24, 2013 at 10:05am

Physics
A pulley of mass mp , radius R , and moment of inertia about its center of mass Ic , is attached to the edge of a table. An inextensible string of negligible mass is wrapped around the pulley and attached on one end to block 1 that hangs over the edge of the table. The other ...
Sunday, November 24, 2013 at 10:01am

Physics
A man lifts a luggage of 20 kg from the ground and puts it on his head 2m above the ground. Calculate the work done by him on the luggage.
Sunday, November 24, 2013 at 9:37am

physics
Forces of F1=975 N,F2= 745 N, f3= 1175 N and are applied at the same point. The angle between f1 and f2 is 60.0 degree and the angle between f2 and f3 is 30.0 degree. F2 is between f1 and f3 find the resultant force.
Sunday, November 24, 2013 at 8:54am

physics
three forces, each of magnitude 1450 LB act in the same point. The angle between adjacent forces is 45.0 degree. Find the resultant force?
Sunday, November 24, 2013 at 8:49am

physics
find the tension in each cable. T1=68.0 degree T2= 25.0 degree weight= 27500 N
Sunday, November 24, 2013 at 8:47am

physics
a 2.50 N rock is thrown down from a cliff at 10.0 m/s. a. what is the velocity after falling 25.0 m? b. velocity as it hits the water 125 m below? c. kinetic energy as it hits the H20?
Sunday, November 24, 2013 at 8:42am

physics
a 2.00 lb rock is dropped from a bridge to the water 50 below. a. what is the velocity as it hits the water? b. how long does it take to hit the water? c. What is its kinetic energy as it hits the H2o?
Sunday, November 24, 2013 at 8:39am

physics
want to bring a weight of 1 kg suspended at a height of 5 feet, slowly down so that it takes 1 min to reach down.how do i make this working
Sunday, November 24, 2013 at 3:34am

Physics
A man has a mass of 65kg on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 13% of his body weight?
Sunday, November 24, 2013 at 2:53am

Physics
A steel (Young's modulus 2.0 x 1011 N/m2) wire is strung between two supports attached to a ceiling. Initially, there is no tension in the wire when it is horizontal. A 98-N picture is then hung from the center of the wire, as the drawing illustrates, so the ends of the ...
Saturday, November 23, 2013 at 11:31pm

Physics
A 61-kg snow skier is being pulled up a 14 ° slope by a steel (Young's modulus 2.0 x 1011 N/m2) cable. The cable has a cross-section area of 7.0 x 10-5 m2. The cable applies a force to the skier, and, in doing so, the cable stretches by 2.1 x 10-4 m. A frictional ...
Saturday, November 23, 2013 at 11:19pm

Physics
A 68-kg water skier is being pulled by a nylon (Young's modulus 3.7 x 109 N/m2) tow rope that is attached to a boat. The unstretched length of the rope is 15 m and its cross-section area is 1.8 x 10-5 m2. As the skier moves, a resistive force (due to the water) of ...
Saturday, November 23, 2013 at 10:47pm

Physics
A 710kg car drives at a constant speed of 23m/s . It is subject to a drag force of 500 N. What power is required from the car's engine to drive the car (a) on level ground? (b) up a hill with a slope of 2.0∘ ?
Saturday, November 23, 2013 at 3:16pm

physics-can anyone solve this please
3. A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field...
Saturday, November 23, 2013 at 11:33am

Physics
Problem 3- A 40 kg child swings in a swing supported by two ropes, each 3 m long. (a) If the tension in each rope at the lowest point is 350 N, a. find the child's speed at the lowest point. b. the force exerted by the seat on the child at the lowest point. (Neglect the ...
Saturday, November 23, 2013 at 8:59am

Physics
Problem 2- A 4 kg object is attached to a vertical rod by two strings, as in the Figure. The object rotates in a horizontal circle at constant speed 6 m/s. Find the tension in (a) the upper string and (b) the horizontal string.
Saturday, November 23, 2013 at 8:58am

physics
how much work (in ft lb) is done by a large bucket that can lift 4.5 ton of dirt 14 ft into the air and dump it into a 5.0 yd cubed dump truck?
Saturday, November 23, 2013 at 7:41am

physics
Two liters of nitrogen combine with 6 L of hydrogen to form 4 L of ammonia. If the molecules of nitrogen and hydrogen have two atoms each, how many atoms of hydrogen and nitrogen are there in one molecule of ammonia?
Friday, November 22, 2013 at 6:38pm

physics
The pressure in each of your car tires is 1.80 105 Pa. The mass of your car is 1660 kg. Assuming that each of your tires bears one-quarter of the total load, what is the contact area of each tire with the road?
Friday, November 22, 2013 at 6:36pm

Physics
A fire truck attaches two fire hoses to a hydrant to fight a fire. Each hose has a diameter of 20 cm. The underground water pipe going to the hydrant has a diameter of 100 cm. In the underground pipe, the water has a speed of 2.0 m/s.
Friday, November 22, 2013 at 4:18pm

physics
Black hole in X-Ray Binary. (2.75/11.0 points) An X-ray binary consists of 2 stars with masses (the accreting compact object) and (the donor). The orbits are circular with radii and centered on the center of mass. (a) Find the orbital period of the binary following the ...
Friday, November 22, 2013 at 2:38pm

physics
A skier of mass 77.7 kg, starting from rest, slides down a slope at an angle $\theta$ of 35.7° with the horizontal. The coefficient of kinetic friction is 0.08. What is the net work, i.e. net gain in kinetic energy, (in J) done on the skier in the first 10.9 s of descent?
Friday, November 22, 2013 at 1:59pm

physics
A spacecraft of mass is first brought into an orbit around the earth. The earth (together with the spacecraft) orbits the sun in a near circular orbit with radius ( is the mean distance between the earth and the sun; it is about 150 million km). (a) What is the speed (in m/s) ...
Friday, November 22, 2013 at 12:43pm

physics
Black hole in X-Ray Binary. (2.75/11.0 points) An X-ray binary consists of 2 stars with masses (the accreting compact object) and (the donor). The orbits are circular with radii and centered on the center of mass. (a) Find the orbital period of the binary following the ...
Friday, November 22, 2013 at 12:34pm

Help Please!!!- Physics
A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show ...
Friday, November 22, 2013 at 12:00pm

Please help!- Physics
3. You travel from New Orleans, Louisiana, with the following vectors: • New Orleans à Point A: q = 180°, Δd = 483 km • Point A à Point B: q = 106°, Δd = 347 km • Point B à Point C: q = 106°, Δd = 347 km Remember: ...
Friday, November 22, 2013 at 12:00pm

Physics electric potential energy difference
A current loop with radius 20 cm and current 2 A is in a uniform magnetic field of 0.5 T. Considering all possible orientations of the loop relative to the field, what is the largest potential energy difference (in Joules) you can find between two orientations?
Friday, November 22, 2013 at 10:03am

physics
Suppose that the range of output frequencies is from 47.4 Hz to 14.8 kHz for a pipe organ. Take 343 m/s for the speed of sound. (a) What is the length (in units of m) of the longest pipe open at both ends and producing sound at its fundamental frequency? (b) What is the length...
Friday, November 22, 2013 at 12:41am

physics
A cylinder is fitted with a piston that is connected to the bottom by a spring. The spring has a spring constant of k = 3600 N/m. The cylinder is open to air at the top and is frictionless. The radius of the cylinder is 25 mm and the piston has negligible mass. The air beneath...
Thursday, November 21, 2013 at 11:43pm

physics
A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show ...
Thursday, November 21, 2013 at 9:24pm

Physics
A 55.0 kg diver steps off a diving board and drops straight down into the water. The water provides an upward average net force 1320 N. If the diver comes to rest 5.8 m below the water's surface, what is the total distance between the diving board and the diver's ...
Thursday, November 21, 2013 at 7:00pm

physics
A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show ...
Thursday, November 21, 2013 at 5:21pm

physics
a uniform (in density and shape) stick is balanced by one end on the ground and the other tied to a massless horizontal rope attached to a wall as shown in the figure. The stick's mass is 10kg and its length is 5m. a. Calculate the tension on the rope b. Calculate the ...
Thursday, November 21, 2013 at 3:43pm

Physics
X rays bombarding heavy atoms can be used to eject electrons from the 1s shell in atoms; indeed, this is the starting point for Moseley’s experiments. Estimate the maximum wavelength of pho- tons required to eject an electron from the 1s shell of copper, for which Z = 29...
Thursday, November 21, 2013 at 2:19pm

Physics
A 100-watt bulb becomes warm and glows brightly enough to light a small room. On the other hand, a 100-watt laser can cut holes in steel and would not be effective at lighting a small room. What is true about the light coming from these two sources that accounts for these dif...
Thursday, November 21, 2013 at 2:19pm

physics
A 0.40 kg mass is attached to a spring with force constant 26 N/m and released from rest at a distance of 3.2 cm from the equilibrium position Use conservation of energy to find the speed of the spring when it is halfway to the equilibrium position Find the maximum speed of ...
Thursday, November 21, 2013 at 1:15am

physics
1. A man pulls a crate with a rope. The crate slides along the floor in the horizontal direction (x direction). The man exerts a force of 50 N on the rope, and the rope is at an angle q. Describe how the force components (Fx, Fy) change as the angle increases from 0° to 90...
Wednesday, November 20, 2013 at 8:23pm

physics
3. You travel from New Orleans, Louisiana, with the following vectors: • New Orleans à Point A: q = 180°, Δd = 483 km • Point A à Point B: q = 106°, Δd = 347 km • Point B à Point C: q = 106°, Δd = 347 km Remember: ...
Wednesday, November 20, 2013 at 8:22pm

Physics
A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show ...
Wednesday, November 20, 2013 at 8:20pm

Physics! Please help! :)
A concave mirror with a radius of curvature of 0.61 m is illuminated by a candle located on the symmetry axis 2.61 m from the mirror. Where is the image of the candle? Answer in units of m
Wednesday, November 20, 2013 at 8:15pm

physics
A concave mirror with a radius of curvature of 0.61 m is illuminated by a candle located on the symmetry axis 2.61 m from the mirror. Where is the image of the candle? Answer in units of m.
Wednesday, November 20, 2013 at 8:07pm

Physics!! help pleasee
A 10 kg object with a velocity 7.5i m/s explodes into two equal fragments. One flies off with a velocity 2.5i -2.5j m/s. What is the velocity of the other fragment in vector notation?
Wednesday, November 20, 2013 at 7:42pm

Physics
How to add vectors in terms of velocity by using vector chart
Wednesday, November 20, 2013 at 7:15pm

Physics
A 10 kg penguin slips down a rough incline of 35o . If the coefficient of kinetic friction between the penguin and the incline is 0.15, determine the penguin’s acceleration.
Wednesday, November 20, 2013 at 6:42pm

Physics
A ball on the end of a string is cleverly revolved at a uniform rate in a vertical circle of radius 85.0cm. If its speed is 4.15 m/s and its mass is 0.300 kg, calculate the tension in the string when the ball is (a) at the top of its path, and (b) at the bottom of its path.
Wednesday, November 20, 2013 at 6:41pm

Physics
A Jet plane traveling 1800 km/h (500 m/s) pulls out of a dive by moving in an arc of radius 6.00 km. What is the plane’s acceleration in g’s?
Wednesday, November 20, 2013 at 6:40pm

Physics
Mars has a moon (Phobos) with an orbital period of 7.67 hours and an orbital radius of 9.4x106 m. Use Kepler’s 3rdLaw to estimate the mass of Mars.
Wednesday, November 20, 2013 at 6:40pm

Physics
A 25 g bullet is fired from a rifle with a barrel of length 65 cm. The bullet starts from rest at one end of the barrel and experiences an average force of 1200 N due to the expanding gases as it moves down the length of the barrel. a) Calculate the work done on the bullet by ...
Wednesday, November 20, 2013 at 6:38pm

Physics
Two blocks are attached together with a piece of string. Block #1 (3 kg) slides along a rough horizontal surface and block #2 (2 kg) hangs off the end of the surface. If the blocks accelerate at 2.5 m/s2 in the directions shown, determine the tension in the string and the ...
Wednesday, November 20, 2013 at 6:35pm

Physics
Posting this question again Design an AC circuit with R, L, and C components so that it can achieve output voltage in a given load to be doubled in amplitude (magnitude) while achieving increase in the phase shift of the output voltage of 45 more than the phase of the input ...
Wednesday, November 20, 2013 at 5:05pm

Physics HELP!!
A gyroscope consists of a uniform disc of mass radius M= 1 kg and radius R= 0.3 m . The disc spins with an angular speed ω= 200 rad⋅s-1 as shown in the figure below. The gyroscope precesses, with its axle at an angle 30∘ below the horizontal (see figure). The ...
Wednesday, November 20, 2013 at 4:23pm

Physics
Three moles of an ideal monatomic gas are at a temperature of 396 K. Then 2438 J of heat is added to the gas, and 897 J of work is done on it. What is the final temperature of the gas?
Wednesday, November 20, 2013 at 4:06pm

Physics
A container holds 1.3 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 6.6x10-3 kg bullet with a speed of 670 m/s. What is the Kelvin temperature of the gas?
Wednesday, November 20, 2013 at 4:06pm

Physics
A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 92.9 m/s2 for 1.85 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude (above the ground) ...
Wednesday, November 20, 2013 at 1:22pm

Physics
Design an AC circuit with R, L, and C components so that it can achieve output voltage in a given load to be doubled in amplitude (magnitude) while achieving increase in the phase shift of the output voltage of 45 more than the phase of the input voltage. Use 60Hz as the ...
Wednesday, November 20, 2013 at 12:33pm

physics
A microwave draws 5.0 A when it is connected to a 120 V outlet. If electrical energy costs $0.090 per kW·h, what is the cost of running the microwave for exactly 6 h?
Wednesday, November 20, 2013 at 10:13am

physics(URGENT!!!!!)
EDXers!!! Plz help with MITx 8.01x I don't know how to solve HW8 Problem 3 Question c) Can anybody help me???? Explain Plz
Wednesday, November 20, 2013 at 7:10am

Physics-Attention ELENA
A circular plate with a slot in its surface is rotating with angular velocity ω and angular acceleration α with respect to a fixed coordinate system, OXYZ as shown. A ball B moves along the slot in the direction shown with velocity, v, and acceleration, a, both ...
Wednesday, November 20, 2013 at 12:32am

Physics
An astronaut is at rest 1.0 m away from his shuttle when his jet malfunctions and his hand-held radio dies. unable to reach his shuttle to return to safety, a) what can the astronaut do to get himself back to his ship? b) Which of Newton's three laws would this demonstrate?
Wednesday, November 20, 2013 at 12:02am

Physics
Three moles of an ideal monatomic gas are at a temperature of 396 K. Then 2438 J of heat is added to the gas, and 897 J of work is done on it. What is the final temperature of the gas?
Tuesday, November 19, 2013 at 11:22pm

Physics
Two spheres of equal mass are thrown against a wall with equal velocities. One sphere rebounds with 75% of its original speed, while the other sticks to the wall. Which imparted a greater impulse to the wall, the sticky ball or the rebounding ball? Justify your answer.
Tuesday, November 19, 2013 at 10:59pm

Physics
A 400 gram block slides down a 30 degree incline from rest and reaches the bottom with a speed of 4.50 m/s. If the height through which the block falls is 2.0 meters, find the average frictional force that acted on the block.
Tuesday, November 19, 2013 at 10:43pm

Physics
calculate the acceleration of this system, assuming that there are no frictional forces between the table and Block A. Block A is sitting on a table connected by a rope to a pulley system and Block B is hanging off the table connected to the rope from the pulley system. Mass ...
Tuesday, November 19, 2013 at 10:39pm

Physics
A container holds 1.3 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 6.6x10-3 kg bullet with a speed of 670 m/s. What is the Kelvin temperature of the gas?
Tuesday, November 19, 2013 at 10:11pm

physics
A person puts a suitcase of mass 10.9 kg into a van, moving the suitcase a total distance of 0.90 m: 0.60 m up and 0.30 m horizontally. How much work is done by the person?
Tuesday, November 19, 2013 at 10:08pm

physics
a go-cart with a mass of 47.0kg is accelerating at a rate of 4.50m/s^2. What net external force is being applied to the go-cart?
Tuesday, November 19, 2013 at 9:55pm

physics
Two blocks are connected by a string over a frictionless, massless pulley such that one is resting on an inclined plane and the other is hanging over the top edge of the plane. The inclined plane is inclined at an angle of 37 degrees. The hanging block has a mass of 16.0 kg, ...
Tuesday, November 19, 2013 at 8:29pm

Physics
the higher the angle the longer an objecg will be in the air , but dose that mean it will go further ?
Tuesday, November 19, 2013 at 7:49pm

Physics - projectile
a ball is thrown straight up at 50 m/s. What speed will it be when it returns to the thrower's hand?
Tuesday, November 19, 2013 at 7:34pm

Physics
A 0.60kg basketball is dunked vertically downward so that it leaves the [layer's hand at 8m/s. Assume it is released when the bottom of the ball is at the rim (3.05 meters off the ground). a). find acceleration of the ball once it leaves the player's hand b). how ling ...
Tuesday, November 19, 2013 at 6:26pm

Physics
A 0.60kg basketball is dunked vertically downward so that it leaves the [layer's hand at 8m/s. Assume it is released when the bottom of the ball is at the rim (3.05 meters off the ground). a). find acceleration of the ball once it leaves the player's hand b). how ling ...
Tuesday, November 19, 2013 at 6:17pm

Physics
A real spring does not oscillate forever. Instead, it eventually comes to a stop. Does this violate the Law of Conservation of Energy? Explain why or why not. I truly don't know what this means at all...can someone help me understand it?
Tuesday, November 19, 2013 at 5:58pm

Physics
A juggler tosses a 0.4kg ball straight up at 8m/s, and then catches it at the same height . a. determine the acceleration on the way up and down b. determine the total amount of time spent in the air by the ball. (hint: you know the displacement) c.determine the velocity of ...
Tuesday, November 19, 2013 at 5:30pm

Physics
A juggler tosses a 0.4kg ball straight up at 8m/s, and then catches it at the same height . a. determine the acceleration on the way up and down b. determine the total amount of time spent in the air by the ball. (hint: you know the displacement) c.determine the velocity of ...
Tuesday, November 19, 2013 at 5:26pm

physics
Astronomers determine masses of distant objects by observing their smaller companions. For example, they can measure the period of a planet orbiting around a distant star, measure the radius of its circular orbit, and then employ Newtonian physics to determine the mass of the ...
Tuesday, November 19, 2013 at 12:31pm

physics
Astronomers determine masses of distant objects by observing their smaller companions. For example, they can measure the period of a planet orbiting around a distant star, measure the radius of its circular orbit, and then employ Newtonian physics to determine the mass of the ...
Tuesday, November 19, 2013 at 12:30pm

Check my answers 6 ?s- Physics
What is a free body diagram? (Points : 1) a drawing of an object in free fall a diagram showing all the forces acting on an object but not its surroundings <-- a diagram showing the shape of an object and the forces that act on it a diagram of an object that is free to ...
Tuesday, November 19, 2013 at 12:11pm

Physics
A rifle shoots 50.0 gram bullet with a muzzle a velocity of 350 m/s. How fast would a 80.0 kg person have to run in order to have the same amount of kinetic energy as the bullet in flight? If the bullet is shot vertically, what is the the maximum height about the gun barrel ...
Tuesday, November 19, 2013 at 11:54am

Physics
A 1000 kg car is going 8.90 m/s has a minimum braking distance of 6.0 meters. Find the average braking force exerted on the car during the stopping process.
Tuesday, November 19, 2013 at 11:50am

Physics
3. A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field...
Tuesday, November 19, 2013 at 11:42am

physics
What are the decibels 917m away from a 35.5 W sound source?
Tuesday, November 19, 2013 at 10:33am

Physics
A woman on a bridge 75.0m high sees a raft floating at a constant speed on the river below. She drops a stone from rest in an attempt to hit the raft. The stone is released when the raft has 7.00m more to travel before passing under the bridge. The stone hits the water 4.00m ...
Tuesday, November 19, 2013 at 10:04am

physics
What are the decibels 917m away from a 35.5 W sound source?
Tuesday, November 19, 2013 at 8:30am

Physics
The brick wall (k=0.80 W/m°C) of a building has 4.0 m X 10.0m dimensions and 15cm thick. How much heat in joules flows through the wall in 12-hour period when the average inside and outside temperatures are 20°C and 50°C?
Tuesday, November 19, 2013 at 7:36am

physics
Find the distance by which a 42cm diameter, 9.4m tall concrete column is compressed when it supports a 12900kg load
Tuesday, November 19, 2013 at 12:59am

physics
How big would a spherical helium balloon have to be to lift a 70kg person? The mass of the balloon's skin is 4.0kg
Tuesday, November 19, 2013 at 12:59am

physics
Water flows at 0.860m/s from a hot water heater, through a 450-kPa pressure regulator. The pressure in the pipe supplying an upstairs bathtub 3.70 m above the heater is 414-kPa. What's the flow speed in this pipe?
Tuesday, November 19, 2013 at 12:58am

Physics
A 1.6 kg mass and a 6 kg mass are connected by a massless string over a pulley that is in the shape of a solid wheel having a radius 0.13 m and mass 5.5 kg. Determine the linear acceleration of the blocks.
Tuesday, November 19, 2013 at 12:02am

Physics
An electromagnetic wave in a vacuum traveling in the +x direction generated by a variable source initially has a wavelength of 2.65 x 10^-4 m and a maximum electric field Emax in the +y direction of 8.20×10^−3 V/m. What are the coefficients in the equation for the ...
Monday, November 18, 2013 at 11:52pm

Physics, Chemistry, Science
I have an assignment about deep sea diving and of course it involves some gas mixtures to be used. I just don't know what suitable gas mixtures do I have to use in order for this diving to be safe and successful. The scenario is this: 1. A shipwreck is located at a depth ...
Monday, November 18, 2013 at 11:30pm

Physics
A 2.2 kg otter starts from rest at the top of a muddy incline 93.9 cm long and slides down to the bottom in 0.60 s. What net external force acts on the otter along the incline? Answer in units of N It requires a number answer but it makes no sense to me. How should I set this up?
Monday, November 18, 2013 at 11:01pm

Physics
A 2.2 kg otter starts from rest at the top of a muddy incline 93.9 cm long and slides down to the bottom in 0.60 s. What net external force acts on the otter along the incline? Does anyone know how to do this?
Monday, November 18, 2013 at 10:49pm

physics
two point charges +q and -q are separated by a distance d. aside from infinity, where else is the potential due to these two charges?
Monday, November 18, 2013 at 10:46pm

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