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July 25, 2014

Homework Help: Science: Physics

Recent Homework Questions About Physics

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Physics 1
What torque is needed to accelerate a 70Kg disk with a 20 cm radius from rest to 10 rad/s?
Thursday, April 17, 2014 at 6:10pm

Physics 1
What is the rotational kinetic energy of the Earth in its orbit around the sun?
Thursday, April 17, 2014 at 6:09pm

Physics 1
Two balls have the same size and mass. One is hollow, the other one is solid. How would you determine which is which without breaking them apart?
Thursday, April 17, 2014 at 4:48pm

Physics 1
If you see an object rotating, is there necessarily net torque acting on it? Explain
Thursday, April 17, 2014 at 4:47pm

Physics
Find Acceleration and velocity of vault or car(from rest). This is info from the movie Fast 5(Vault Heist). time = 15s Vault ≈ 74,750 lb ≈ 33,903.03 kg Car ≈ 1900 kg Money in vault ≈ 4,900 kg Estimate coefficient (tires & concrete) ≈ 1 Estimate ...
Thursday, April 17, 2014 at 4:04pm

physics
a window easher pushes his brush up a vertical window at constant velocity by applying a force F as shown below. The brush weighs 12 N and the coefficient of the kinetic friction is 0.2. find the magnitude of force F.
Thursday, April 17, 2014 at 11:52am

physics
Two blocks are connected by a light string that passes over a massless, frictionless pulley as shown. The coefficient of friction between the 4kg block and the surface is 0.4. Find the acceleration of the system and the tension in the string.
Thursday, April 17, 2014 at 11:49am

Physics
Bioluminescence Some species of dinoflagellate (a type of unicellular plankton) can produce light as the result of biochemical reactions within the cell. This light is an example of bioluminescence. It is found that bioluminescence in dinoflagellates can be triggered by ...
Thursday, April 17, 2014 at 12:34am

Physics
an open tank contains a layer of oil floating on top of a layer of water (of density 1000 kg/m3) that is 3.0 m thick, as shown. What must be the thickness of the oil layer if the gauge pressure at the bottom of the tank is to be 9.1×104 Pa? The density of the oil is 880 ...
Thursday, April 17, 2014 at 12:33am

Physics
How Many Capillaries? The aorta has an inside diameter of approximately 2.1 cm, compared to that of a capillary, which is about 1.0×10−5m (10 μm). In addition, the average speed of flow is approximately 1.0 m/s in the aorta and 1.0 cm/s in a capillary Assuming...
Thursday, April 17, 2014 at 12:32am

Physics
A Blowhard Tests of lung capacity show that adults are able to exhale 1.5 liters of air through their mouths in as little as 1.0 second. A. If a person blows air at this rate through a drinking straw with a diameter of 0.49cm , what is the speed of air in the straw? v = ___ m/...
Thursday, April 17, 2014 at 12:32am

Physics
A 77 kg window cleaner uses a 13 kg ladder that is 7.1 m long. He places one end on the ground 3.8 m from a wall, rests the upper end against a cracked window, and climbs the ladder. He is 3.9 m up along the ladder when the window breaks. Neglect friction between the ladder ...
Wednesday, April 16, 2014 at 11:32pm

Physics
A rope of length L = 5.2 m with a total mass of m = 0.275 kg is tied to a hook rigidly mounted into a wall. A pulse of height 1.9 cm is sent down the rope. The tension in the rope is F = 29 N. (B) What is the height of the pulse that returns?
Wednesday, April 16, 2014 at 8:34pm

physics
calculate the image positions and magnifications for an object 3cm tall and a mirror of focal length +12 with the object at the following positions: 2.5 f, 2.0 f, 1.5 f, 0.5 f. please help me don't understand it at all. it would be best if you can explain it to me rather ...
Wednesday, April 16, 2014 at 5:06pm

physics
A hailstone traveling with a velocity of 43 meters/second comes to a virtual stop 0.28 seconds after hitting water. What is the magnitude of its acceleration in the water
Wednesday, April 16, 2014 at 4:51pm

physics
Putting a lid on a boiling pot greatly reduces the heat transfer necessary to keep it boiling. Explain why
Wednesday, April 16, 2014 at 3:19pm

Physics
A person pushes with a horizontal force of 25 N 4kg block, initially at rest on a horizontal table, a distance of 3m. The coefficient of kinetic friction between the block and table is 0.35. determine external work on the block-table system. the energy dissipated by friction ...
Wednesday, April 16, 2014 at 12:41pm

Physics
what will be the final temp of 500g of 21c waterbullets are dropped in? when 500g of 324c lead
Wednesday, April 16, 2014 at 12:14pm

physics
sf
Wednesday, April 16, 2014 at 11:21am

Physics
A ladder 13 feet long leans against a vertical frictionless wall with its lower end 5 feet from the wall. the ladder weighs 80 lbs and its center of gravity is at its center. Find the magnitude and direction of the force exerted on the lower end of the ladder.
Wednesday, April 16, 2014 at 10:49am

physics
A10m long ladder of mass 18kg leans against a frictionless wall. The ladder makes a 20 angle with the wall. The cofficient of friction between the ladder and the ground is 0.3. How far up the ladder can a 75kg man climb before the ladder slips?
Wednesday, April 16, 2014 at 10:29am

physics
Which of the following statements about a system in resonance is true A.The energy of the system is always increasing. B.The greater the damping the larger the amplitude of the oscillations C.The driving force is always in the direction of the velocity. D.The frequency of the ...
Wednesday, April 16, 2014 at 9:42am

physics
Your town is installing a fountain in the main square. If the water is to rise 26 m (85.3 feet) above the fountain, how much pressure must the water have as it moves slowly toward the nozzle that sprays it up into the air? Assume atmospheric pressure equal to 100,000 Pa.
Wednesday, April 16, 2014 at 9:10am

Physics please help?????
The figure shows three rotating, uniform disks that are coupled by belts. One belt runs around the rims of disks A and C. Another belt runs around a central hub on disk A and the rim of disk B. The belts move smoothly without slippage on the rims and hub. Disk A has radius R; ...
Wednesday, April 16, 2014 at 7:35am

national academy physics
a circular track is made on which an athlete has to cover three rounds to complete a 1000m run.during the run find the distance and magnitude of displacement of the athlete
Wednesday, April 16, 2014 at 7:21am

Physics
Gravity on Mars is 1/3 of that on earth. If Mars atmosphere is only 2 km thick, what is atmospheric pressure on Mars?
Wednesday, April 16, 2014 at 4:32am

Physics
An airplane is flying at an altitude of 2,000 m with a speed of 216 m/s. What is the pressure of air outside the plane?
Wednesday, April 16, 2014 at 4:31am

physics
An object floats on water with 84% of its volume below the surface. The same object when placed in another liquid floats on that liquid with 74% of its volume below the surface. Determine the density of the unknown fluid
Wednesday, April 16, 2014 at 2:41am

Math/Physics
John is driving at a constant speed of 20.0 m/s when he passes Jane, who is traveling in the same direction at 15.0 m/s at the moment that John passes her. If Jane is accelerating at 2.0 m/s2, how far will Jane drive before she catches up to John? How much time passes from ...
Tuesday, April 15, 2014 at 11:13pm

Physics
A crate begins sliding down a frictionless incline of 25.0o. If the objects begins sliding from rest and takes 1.50 sec to slide down the incline, what is the speed of the crate as it leaves the incline? How long is the incline?
Tuesday, April 15, 2014 at 7:54pm

Physics
John is driving at a constant speed of 20.0 m/s when he passes Jane, who is traveling in the same direction at 15.0 m/s at the moment that John passes her. If Jane is accelerating at 2.0 m/s2, how far will Jane drive before she catches up to John? How much time passes from ...
Tuesday, April 15, 2014 at 7:54pm

college physics
A reflecting telescope has a radius of curvature of 3m for its objective mirror and a radius of curvature of -1.5 for its eyepiece mirror. If the distance between the two mirrors is 0.90 m, how far in front of the eyepiece should you place the electronic sensor to record the ...
Tuesday, April 15, 2014 at 4:06pm

Physics
The figure shows three rotating, uniform disks that are coupled by belts. One belt runs around the rims of disks A and C. Another belt runs around a central hub on disk A and the rim of disk B. The belts move smoothly without slippage on the rims and hub. Disk A has radius R; ...
Tuesday, April 15, 2014 at 4:06pm

physics
A shout down a well produces an echo in 2.00 seconds. How deep is the surface of the water in the well? Assume the speed of sound to be 343 m/s.
Tuesday, April 15, 2014 at 4:01pm

physics
jabu phuses a cart that is of mass 5kg with a speed of 1m,s she suddenly increase the force acting on the cart to move 2m,s for a distance of 50m (a)calculate the force causing the cart to speed up
Tuesday, April 15, 2014 at 1:29pm

Physics
A ball is kicked and flies from point P to Q following a parabolic path in which the highest point reached is T. The acceleration of the ball is
Tuesday, April 15, 2014 at 12:40pm

Physics
Man stands out on the street with a frequency meter. A police car drives by with the sirens on and the frequency of the sounds measures 800 Hz when it get close but 600 Hz when the car goes away. a) What is the speed of the police car? b) What is the actual frequency of the ...
Tuesday, April 15, 2014 at 8:29am

physics
Propeller blade in aeroplane is 2m long if propeller rotates 1800rev/min compute tangential velocity.
Tuesday, April 15, 2014 at 6:07am

statistics
Leslie took two midterm exams and earned the following scores: 82 on the chemistry exam (class distribution: μ = 75, σ = 6.25) and 63 on the physics exam (class distribution: μ = 59, σ = 3.57). Rounding to two decimal points, on which exam should Leslie get...
Monday, April 14, 2014 at 10:27pm

Physics
A "reference ring" with moment of inertia Ic rests on a solid disk torsion pendulum with a moment of inertia I0. a) What is the period T0 for the motion with the disk alone? b) What is the period T1 for motion with the combined system? c) Use the expressions from a) ...
Monday, April 14, 2014 at 9:22pm

Physics
The graph below shows the force applied to a 4.0 kg cart initially at rest but free to move on a horizontal track. Forces (in N) are measured on the ordinate and times (in s) are measured on the abscissa. Use the following values for the graph: a = 4.9 and x = 2.0. Assume the ...
Monday, April 14, 2014 at 8:22pm

PHYSICS
A dog sitting 2.2m from a vertical mirror thinks its image is another dog. A)How far is the image from the dog? B)To investigate, the dog walks directly toward the mirror at 0.28m/s . At what rate does the dog approach its image?
Monday, April 14, 2014 at 6:19pm

PHYSICS
A laser is mounted on a table 1.04m above the ground, pointed at a vertical mirror a horizontal distance 3.46m away. The laser beam strikes the mirror 1.52m above the ground. Behind the laser is a wall, 2.80m from the aperture where the laser light emerges. At what height does...
Monday, April 14, 2014 at 6:18pm

physics
A 15.4g bullet traveling at 270 m/s is fired into a 0.488kg wooden block anchored to a 100 N/m spring. How far is the spring compressed? x_{compressed} = If the speed of the bullet is not known but it is observed that the spring is compressed 43.9 cm, what was the speed of ...
Monday, April 14, 2014 at 5:28pm

physics
Two wires are anchored at both ends. Wire 1 has a mass of 105 grams and a length of 6.9 m. Wire 2 has a mass of 60 grams, a length of 20 m, and a tension of 143 N. What must be the tension in Wire 1 if its third harmonic is to equal the first overtone of Wire 2? T_{wire1} =
Monday, April 14, 2014 at 5:20pm

physics
The velocity of a simple harmonic oscillator is given by; v = + 6.92*sin(10.5*t) (mks units) What is its angular frequency? omega = What is the amplitude of the motion? A = Where is the mass at the time t = 86.08 seconds? x = If the mass is 0.53 kg, what is the spring's ...
Monday, April 14, 2014 at 5:02pm

physics
the binding energy of a nucleus is 240.0 MeV. What is the mass defect of the nucleus in atomic mass units?
Monday, April 14, 2014 at 4:29pm

Physics
An object is 14 cm in front of a diverging lens that has a focal length of -7.9 cm. How far in front of the lens should the object be placed so that the size of its image is reduced by a factor of 1.9?
Monday, April 14, 2014 at 4:26pm

Physics
A magnifying glass (a positive lens) with a focal length of +6 cm is placed 2 cm above a page of print. What is the magnification of this image?
Monday, April 14, 2014 at 3:56pm

Physics
Last question i'm stuck on please help me through this. Five waves pass a dock in 2.0 s. If the waves are traveling at 10.0 m/s, then what is the wavelength of the waves?
Monday, April 14, 2014 at 1:50pm

Physics
A cue ball collides with two other snooker balls and comes to a complete stop. The angles between the centres at the point of collision are shown below. If the velocity of the incoming cue ball is 5 m/s, determine the velocities of all moving balls after the collision.
Monday, April 14, 2014 at 1:32pm

Physics
A cargo plane is flying horizontally at an altitude of 10000m with a velocity of 800km/h when a cargo pallet falls out the back ramp. (i) How long does it take to fall to the ground? (ii) How far horizontally is the pallet from where it fell off when it hits the ground? (iii) ...
Monday, April 14, 2014 at 1:25pm

physics
Four identical masses of mass 800kg each are placed at the corners of a square whose side lengths are 15.0cm . What is the magnitude of the net gravitational force on one of the masses, due to the other three?
Monday, April 14, 2014 at 12:38pm

Physics
Help me please I'm stuck on this question 2.In a thunderstorm at 20.0°C, Karen sees a bolt of lightning and hears the thunderclap 3.00 s later. How far from Karen did the lightning strike? Show your work.
Monday, April 14, 2014 at 12:33pm

Physics
A radar sends out a sound wave of 1.50 Mhz and senses it again from a moving car at a 1.40 Mhz. What is the speed of the car ?
Monday, April 14, 2014 at 8:17am

physics
A hammer with 10 J of kinetic energy hits a nail and pushes it 5.0 mm into a plank. Both the hammer and nail come to rest after the collision. What is the average force that acts on the nail while it moves the 5.0 mm?
Monday, April 14, 2014 at 4:26am

Physics
An airplane is flying at an altitude of 2,000 m with a speed of 216 m/s. What is the pressure of air outside the plane?
Monday, April 14, 2014 at 3:24am

Physics
Gravity on Mars is 1/3 of that on earth. If Mars atmosphere is only 2 km thick, what is atmospheric pressure on Mars?
Monday, April 14, 2014 at 3:21am

physics
1. A car travels down a straight, flat, level road. Initially, the car is traveling at 80.0 km/hr Northward . After traveling 0.50 0 km , the car is traveling at 95 .0 km/hr. What is the magn i tude of the car ’ s acceleration during this interval ?
Monday, April 14, 2014 at 1:09am

physics
The drawing shows the top view of two doors. The doors are uniform and identical. Door A rotates about an axis through its left edge, and door B rotates about an axis through its center. The same force is applied perpendicular to each door at its right edge, and the force ...
Monday, April 14, 2014 at 12:56am

physics 1
A person is sitting with one leg outstretched and stationary, so that it makes an angle of 30.0° with the horizontal, as the drawing indicates. The weight of the leg below the knee is 50.5 N, with the center of gravity located below the knee joint. The leg is being held in...
Sunday, April 13, 2014 at 9:43pm

physics
A small object is attached to the end of a horizontal spring at position x = 0. It is the pulled to position x = A and released. In one full cycle of its motion, the total distance traveled by the object is...
Sunday, April 13, 2014 at 8:58pm

Physics
Can someone help with the following physics problem? This is the only one I'm having trouble solving. Thanks. A 3.6-m-long ladder leans against a frictionless wall as shown in the figure below. The coefficient of static friction between the ladder and the floor is 0.30. ...
Sunday, April 13, 2014 at 12:30pm

Health Physics
1. Two blocks of mass 0.1 kg and 0.2 kg approach each other on a frictionless surface at velocities of 0.4 and 1 m/s respectively. If the blocks collide and remain together, calculate their joint velocity after the collision. 2. A cyclotron produces a 100-μA beam...
Sunday, April 13, 2014 at 11:18am

physics grade 10 icse
two balls of masses in ratio 1:2 are dropped from the same height find : a. the ratio between their velocities when they strike the ground and b. the ratio of the forces acting on them during motion
Sunday, April 13, 2014 at 12:21am

Physics 141
A 71-kg skier is going down a slope oriented 37° above the horizontal. The area of each ski in contact with the snow is 0.13 m2. Determine the pressure that each ski exerts on the snow.
Saturday, April 12, 2014 at 11:52pm

Physics
Which of the following is the equation of the circle with centre (-1.5, 0.5) and radius 3? A. 2x^2 + 6x + 2y^2 - 2y - 13 = 0 B. 2x^2 - 6x + 2y^2 + 2y - 13 = 0 C. 2x^2 - 6x + 2y^2 - 2y - 13 = 0 D. 2x^2 + 6x + 2y^2 - 2y - 23 = 0 E. @x^2 + 6x + 2y^2 - 2y -14 = 0
Saturday, April 12, 2014 at 11:45pm

Physics
A man of mass 75 kg lies on a bed of 10,000 nails. The tip of each nail has an area of 1.0 square millimeter. What pressure does the man experience? [g=10 N/kg]
Saturday, April 12, 2014 at 3:04pm

Physics
5.00 kg of some liquid at 10.0 oC is mixed with 1.00 kg of the same liquid at 40.0 oC. what is the final equilibrium temperature? ignore any heat flow with the containers and/or surroundings
Saturday, April 12, 2014 at 1:44pm

physics
In one type of mass spectrometer, ions having the same velocity move through a uniform magnetic field. The spectrometer is being used to distinguish 12C+ and 14C+ ions that have the same charge. The 12C+ ions move in a circle of diameter 25 cm. (a) What is the diameter of the ...
Saturday, April 12, 2014 at 12:41pm

physics
A cylindrical conductor of radius carries a uniformly distributed current I. Show that the magnetic field within the conductor measured at a distance r from the center is given by the following equation... B= (u0Ir)/2pi a^2
Saturday, April 12, 2014 at 12:38pm

Physics
An object of mass 50 g floats in a liquid of density 2.5 g/ml. When the object is placed in a liquid of density 2.0 g/ml, it sinks to the bottom of the container. What is the force that the object exerts on the bottom of the container? [g = 10m/s^2 = 10N/kg]
Saturday, April 12, 2014 at 2:11am

Physics (Rotation)
In the figure, wheel A of radius rA is coupled by belt B to wheel C of radius rC. The angular speed of wheel A is increased from rest at a constant rate α. Find the time needed for wheel C to reach angular speed ω assuming the belt does not slip. (Hint: If the belt ...
Saturday, April 12, 2014 at 12:43am

College Physics
A uniform stationary ladder of length= 5.1 m and mass= 15 kg leans against a smooth vertical wall, while its bottom legs rest on a rough horizontal floor. The coefficient of static friction between floor and ladder is μ = 0.41. The ladder makes an angle θ = 51° ...
Friday, April 11, 2014 at 10:00pm

physics
A block is attached to a horizontal spring and set in simple harmonic motion, as shown in the figure. At what point in the motion is the speed of the block at its maximum? The position of the block when the spring is relaxed is marked by x = 0, and the extremes of the block\&#...
Friday, April 11, 2014 at 8:05pm

physics
An object-–spring system undergoes simple harmonic motion. If the mass of the object is doubled, what will happen to the period of the motion?
Friday, April 11, 2014 at 8:01pm

Physics
A uniform bar length of 2.0m and weight 1000 N has its center of gravity at its center. The bar is pivoted 0.5m from the right, and supports a weight of 200N on the opposite end (left end). What is the weight needed at right end of the bar to balance the bar?
Friday, April 11, 2014 at 5:18pm

Physics Energy
How would a $10.00 compact fluorescent light bulb (15 W) be an overall money saver compared to an incandescent light bulb (60 W) that costs $0.50?
Friday, April 11, 2014 at 4:16pm

Physics
A cannon launches a ball with the initial speed of 210 m/s at a 70 degree angle. 1. How high will the cannonball go? 2. If the cannonball has a mass of 25kg how much work does it take to launch the cannonball to that height?
Friday, April 11, 2014 at 3:06pm

Physics
Standing at the edge of a cliff 240 m tall. You throw a ball into the air one directly upward at 5 m/a and another downward at -5 m/s. Use conservation energy to show that they will have the same speed at the bottom. I know I have to do it twice.. And it should seem simple. I...
Friday, April 11, 2014 at 2:56pm

Physics
A wheel with a weight of 395N comes off a moving truck and rolls without slipping along a highway. At the bottom of a hill it is rotating at an angular velocity of 23.0rad/s . The radius of the wheel is 0.607m and its moment of inertia about its rotation axis is 0.800 MR2. ...
Friday, April 11, 2014 at 1:25pm

Physics
A space probe is traveling in outer space with a momentum that has a magnitude of 7.84 x 107 kg·m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 1.29 x 106 N and a direction opposite to the probe's motion. ...
Friday, April 11, 2014 at 11:09am

Physics
Two forces FA and FB are applied to an object whose mass is 9.53 kg. The larger force is FA. When both forces point due east, the object's acceleration has a magnitude of 1.43 m/s2. However, when FA points due east and FB points due west, the acceleration is 1.28 m/s2, due...
Friday, April 11, 2014 at 9:12am

physics
A 0.527 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plunger, and comes to rest some distance above the plunger. The plastic tube has an inner radius of 7.07 mm, and is frictionless. Neither the plunger nor...
Friday, April 11, 2014 at 12:06am

physics
Given that the small piston has a radius of 0.0330 meters^2 and the large piston has a radius of 4.00 meters^2. (a) What force will the large piston provide if the small piston is pushed down with a force of 17.0 N?. (b) If the small piston is slowly depressed a distance of y1...
Thursday, April 10, 2014 at 11:05pm

physics
Here is a demonstration Pascal used to show the importance of a fluid's pressure on the fluid's depth(Figure 1) : An oak barrel with a lid of area 0.17m2 is filled with water. Along, thin tube of cross-sectional area 5.0×10−5m2 is inserted into a hole at ...
Thursday, April 10, 2014 at 10:56pm

physics
If you dive to a depth of 10m below the surface of a lake, Part A what is the pressure due to the water alone? What is the absolute pressure at that depth?
Thursday, April 10, 2014 at 10:54pm

physics
A 2.7-m nylon fishing line used to hold up a 7.1-kg fish has a diameter of 1.8mm . Part A How much is the line elongated?
Thursday, April 10, 2014 at 10:52pm

physics
A staging that weighs 210 N supports two painters, one 310 N and the other 440 N. The reading in the left scale is Fℓ = 320 N. What is the reading Fr in the right hand scale? Answer in units of N
Thursday, April 10, 2014 at 9:52pm

physics
A 50kg girl sits at the top of a slide 6m long tilted at an angle of 30 degrees. if it takes her 3.3s to slide to the bottom and the coefficient of kinetic friction is 0.45, how fast will she be going at the bottom?
Thursday, April 10, 2014 at 9:49pm

physics
Horizontal rays of red light (λ = 660 nm, in vacuum) and violet light (λ = 410 nm, in vacuum) are incident on the flint-glass prism shown in the drawing. The indices of refraction for the red and violet light are nred = 1.662 and nviolet = 1.698. The prism is ...
Thursday, April 10, 2014 at 9:45pm

physics
Bird bones have air pockets in them to reduce their weight–this also gives them an average density significantly less than that of the bones of other animals. Suppose an ornithologist weighs a bird bone in air and in water and finds its mass is 43.0 g and its apparent ...
Thursday, April 10, 2014 at 9:39pm

physics
A 0.527 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plunger, and comes to rest some distance above the plunger. The plastic tube has an inner radius of 7.07 mm, and is frictionless. Neither the plunger nor...
Thursday, April 10, 2014 at 9:34pm

Physics
convert 220 degree into radians show work.
Thursday, April 10, 2014 at 8:01pm

Physics
A space probe is traveling in outer space with a momentum that has a magnitude of 7.84 x 107 kg·m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 1.29 x 106 N and a direction opposite to the probe's motion. ...
Thursday, April 10, 2014 at 6:28pm

Physics
When a compact disk with a 12.0-cm diameter is rotating at 4.2 rad/s, what is (a) the linear speed and (b) the centripetal acceleration of a point on its outer rim?
Thursday, April 10, 2014 at 5:01pm

physics
Light that is polarized along the vertical direction is incident on a sheet of polarizing material. Only 98% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. No light passes through the second sheet. What angle does the ...
Thursday, April 10, 2014 at 4:46pm

Physics
A solid cylinder is mounted above the ground with its axis of rotation oriented horizontally. A rope is wound around the cylinder and its free end is attached to a block of mass 54.0 kg that rests on a platform. The cylinder has a mass of 265 kg and a radius of 0.430 m. Assume...
Thursday, April 10, 2014 at 4:38pm

physics
The intensity of the light that reaches the photocell in the figure below is 104.6 W/m2, when θ = 26°. What would be the intensity reaching the photocell if the analyzer were removed from the setup, everything else remaining the same?
Thursday, April 10, 2014 at 4:27pm

Physics
A solid cylinder is mounted above the ground with its axis of rotation oriented horizontally. A rope is wound around the cylinder and its free end is attached to a block of mass 54.0 kg that rests on a platform. The cylinder has a mass of 265 kg and a radius of 0.430 m. Assume...
Thursday, April 10, 2014 at 4:15pm

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