Friday

February 5, 2016
**PHYSICS**

The static pressure in horizontal pipeline is 43000Pa and the cross sectional area is 20cm. The fluid is said to be incompressible and non viscous and has density of 1000kg/m. Calculate:- -velocity -The volume flow rate in a pipe
*Saturday, December 5, 2015 by MORE*

**physics **

A beam 6 m long is simply supported at the ends,and carries a uniform distributed load of 1500kg/m (including its own weight ) and three concentrated loads of 1000,2000 and 3000 kg acting respectively at the left quarter point,centre point and right quarter point. Draw the ...
*Saturday, December 5, 2015 by Marfo *

**Physics**

Using the definition of work, get a job on the tension of the spring with a spring constant 300,0 H / m 20,0sm. The spring stiffness of the spring gun with 400 Nm pro- ryadili bullet clenched spring by 5.0 cm. Weight 10.0 g bullet from the spray gun shot up. Determine the ...
*Saturday, December 5, 2015 by Aung*

**physics**

Orders of magnitude 2: What is the energy of a photon of wavelength λ=780 nm. Please give the energy in K⋅kB units this time (to within 1%). This is an equivalent temperature unit: (Tequiv=E/kB), with the temperature in Kelvin (K), and kB is the Boltzmann constant. ...
*Saturday, December 5, 2015 by Abd*

**physics**

Orders of magnitude 4: Assume again a Rubidium atom (mass m=87⋅u) is initially at rest. Again it then absorbs a photon of wavelength λ=780 nm. What is the kinetic energy Ekin of the atom after this process? Please give the energy in μK⋅kB units. This is ...
*Saturday, December 5, 2015 by Abd*

**physics**

If you push a box for a distance of one meter with a force of 4,187 newtons How many calories have you used?
*Friday, December 4, 2015 by anonimous*

**Physics**

A gas cylinder has a volume on 200l, and contains Nitrogen at a pressure of 200kPa and a temperature of 290 degrees Kelvin. The molar mass of Nitrogen is 14.0067g. Calculate. The number of moles in the gas cylinder?
*Friday, December 4, 2015 by John*

**Physics**

The total U.S. consumption of electricity in a particular year was 5.0 x 1012 kilowatt-hours. What is the mass equivalence of this amount of energy? Show all calculations leading to an answer.
*Friday, December 4, 2015 by Lexi *

**Physics**

Suppose the thickness of an oil film on water is just the right thickness for canceling red light. What color will your eye see? Explain using 3 – 4 complete sentences.
*Friday, December 4, 2015 by Lexi*

**Physics**

In a lab experiment, 45 grams of a metal are heated from 22⁰C to 78⁰C by the addition of 450 J of heat. What is the specific heat of the metal? Show all calculations leading to an answer.
*Friday, December 4, 2015 by lexi*

**physics**

A 189.4 kg uniform, horizontal beam is hinged at one end and at the other is supported by a cable that is at 37 degrees to the vertical. The beam is 3.85 m long. Calculate the magnitude of the force at the hinge.
*Friday, December 4, 2015 by S*

**Physics, Statistics**

Consider a series of 8 flips of a fair coin. (a) Calculate the probabilities for obtaining 0-8 heads. We will consider each of these nine outcomes to be macrostates of the system. (b) Calculate the entropy for each of these macrostates. I was able to figure out part A, but I&#...
*Friday, December 4, 2015 by Heidi*

**Physics**

Consider eight, eight-cubic centimeter (8 cm3) sugar cubes stacked so that they form a single 2 x 2 x 2 cube. How does the surface area of the single, large cube compare to the total surface area of the individual eight cubes? Report your answer as a ratio. Be sure to show all...
*Friday, December 4, 2015 by Ariel*

**Physics **

A horizontal water pipe goes from a large diameter to a small diameter and then back to the first diameter as shown in the figure below. The level of water (8cm in the larger tube and 4 cm in the constricted tube) in the small vertical tubes provides us with information about ...
*Friday, December 4, 2015 by Anna*

**Physics**

A satellite has a mass of 6090 kg and is in a circular orbit 4.63 × 105 m above the surface of a planet. The period of the orbit is 2.4 hours. The radius of the planet is 4.86 × 106 m. What would be the true weight of the satellite if it were at rest on the planet...
*Friday, December 4, 2015 by Tim*

**Physics**

A 5000 kg truck rear ends a 2500 kg car. Both vehicles applied brakes at the moment of the impact and began to skid. After the impact, the acceleration of the truck is -2 m/s and the acceleration of the car is -3 m/s. If the car skid for 30 m and the truck for 2 m, how fast ...
*Friday, December 4, 2015 by Karen *

**Physics**

A cylinder of gas is compressed by a piston from an initial volume of 125 liters to a final volume of 90 liters. The compression occurs at constant pressure, and the work done on the gas by the piston is 104 joules. What is the gas pressure during the compression? (1 liter = ...
*Friday, December 4, 2015 by Johnny Black*

**Physics**

A child and sled with a combined mass of 45.0 kg slide down a frictionless hill. If the sled starts from rest and has a speed of 8.0 m/s at the bottom, what is the height of the hill (include units)?
*Friday, December 4, 2015 by Help!!!!*

**statistics**

a student gets the following grades in his 5 subjects: 87 for calculu; 82 for Physics; 79 for Chemistry; 81 for english; 83 for history. Compute the weighted mean if the weights for the 5 subjects are 5,4,4,3, and 3, repectively
*Friday, December 4, 2015 by wew*

**Physics**

The resultant of two forces is 50N. If the forces are perpendicular to each other and one of them makes an angle of 300 with the resultant, find its magnitude
*Friday, December 4, 2015 by Olamilekan*

**AP Physics**

How fast (in rpm) must a centrifuge rotate if a particle 6.0 cm from the axis of rotation is to experience an acceleration of 130000 g's
*Friday, December 4, 2015 by -*

**AP Physics**

A fire engine must lift 30 kg of water a vertical distance of 20 m each second. What is the amount of power needed for the water pump for this fire hose? Is the answer 5880W? If yes, why so?
*Friday, December 4, 2015 by Collins*

**AP Physics**

The Eiffel Tower is 300 m tall. When you are standing at a certain place in Paris, it subtends an angle of 7.0°. How far are you, then, from the Eiffel Tower?
*Thursday, December 3, 2015 by -*

**physics**

A hiker begins a trip by first walking 25.0 km 45.0° south of east from her base camp.On the second day she walks 40.0 km in a direction 60.0° north of east, at which point she discovers a forest ranger’s tower.Find the magnitude of the displacement from base camp...
*Thursday, December 3, 2015 by jasmeen*

**Physics Help Needed**

Two blocks are connected by massless string that is wrapped around a pulley. Block 1 has a mass m1=6.90 kg, block 2 has a mass m2=2.30 kg, while the pulley has a mass of 1.70 kg and a radius of 12.2 cm. The pulley is frictionless, and the surface mass 1 is on is also ...
*Thursday, December 3, 2015 by Anonymous*

**physics**

Calculate the gravitational force in N between a 17.3 kg object and 14.8 kg object that are separated by 1.02 m
*Thursday, December 3, 2015 by ciara*

**Physics**

Help Needed Please... After changing a tire on your car, you need to tighten one of the lug nuts to the proper specified torque of 49.0 N m. How much force is needed if you're pushing down on the end of the 39.0 cm long torque wrench at an angle of 120° with respect to...
*Thursday, December 3, 2015 by Anonymous*

**Physics**

Help Needed Please... After changing a tire on your car, you need to tighten one of the lug nuts to the proper specified torque of 49.0 N m. How much force is needed if you're pushing down on the end of the 39.0 cm long torque wrench at an angle of 120° with respect to...
*Thursday, December 3, 2015 by Anonymous*

**Physics**

On a frictionless horizontal air table, puck A (with mass 0.255 kg ) is moving toward puck B (with mass 0.365 kg ), which is initially at rest. After the collision, puck A has velocity 0.118 m/s to the left, and puck B has velocity 0.649 m/s to the right. What was the speed ...
*Thursday, December 3, 2015 by Amanda*

**Physics**

Two ice skaters stand at rest in the center of an ice rink. When they push off against one another the 61-kg skater acquires a speed of 0.63 m/s . If the speed of the other skater is 0.86 m/s , what is this skater's mass?
*Thursday, December 3, 2015 by Amanda*

**Physics**

A 30-06 caliber hunting rifle fires a bullet of mass 0.0101 kg with a velocity of 279 m/s to the right. The rifle has a mass of 3.46 kg. What is the recoil speed of the rifle as the bullet leaves the rifle? Answer in units of m/s.
*Thursday, December 3, 2015 by Elisabeth*

**physics**

A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 32.0 m above sea level, directed at an angle theta = 47.3° above the horizontal, and with a speed v = 35.5 m/s. Assuming that air friction ...
*Thursday, December 3, 2015 by danniel*

**Physics**

A stone is aimed at a cliff of height h with an initial speed of v = 36.0 m/s directed 75.0° above the horizontal, as shown in the Figure below by the arrow. The stone strikes at A, 6.25 s after launching. What is the height of the cliff?
*Thursday, December 3, 2015 by Kevin*

**Please Check My Work: College Physics**

Determine the minimum angle at which a roadbed should be banked so that a car traveling at 20 m/s can safely negotiate the curve if the radius of the curve is 200m. * Data: v=20 m/s r=200m *Formula TAN(theta)=v^2/rg *Solution TAN(theta)=(20 m/s)^2/(200m)(9.8 m/s^2) TAN(theta...
*Thursday, December 3, 2015 by Jose Luis*

**Please Check: College Physics**

A 8 kg block is moving with an initial speed of 6 m/s on a rough horizontal surface. If the force is 12 N, approximately how far does the block travel before it stops? *I have: V^2=Vi^2+2ax 0=(6 m/s)^2 + 2(-9.8 m/s^2)(x) -36 m^2/s^2 = -19.6 m/s^2(x) x = 1.83 m. *Is this ...
*Thursday, December 3, 2015 by Jose Luis*

**physics**

a 2.0 kg solid mass has an apparent weight 12.34N when totally immersed in water. Calculate the apparent weight of the body when totally immersed in a liquid of density 0.78
*Thursday, December 3, 2015 by jay*

**PHYSICS**

two masses m1 = 12 kg and m2 = 13 kg are connected by a light inextensible string passing over a frictionless pulley. Find (a) acceleration of the system when released from rest (b) tension in the string ?
*Thursday, December 3, 2015 by Camz*

**physics **

particle A makes a elastic collision with another particle B at rest.they fly apart in opposite directions with equal speed.if their masses are Ma and Mb respectively ,then relations between Ma and Mb.
*Thursday, December 3, 2015 by Bn sharma*

**physics**

ahmed throws a ball at initial velocity of 36 meter per second.assuming the ball is caught at the same height at which it was released. calculate the maximum distance the ball can reach.
*Thursday, December 3, 2015 by nuzhat*

**physics**

a brick of mass 2.0kg is dropped from a rest position 5.0m above the ground what is its velocity at a height of 3.0m above the ground [g=9.8meter per second square
*Thursday, December 3, 2015 by asma*

**Physics Check My Work Please**

Determine the minimum angle at which a roadbed should be banked so that a car traveling at 20 m/s can safely negotiate the curve if the radius of the curve is 200m. * Data: v=20 m/s r=200m *Formula TAN(theta)=v^2/rg *Solution TAN(theta)=(20 m/s)^2/(200m)(9.8 m/s^2) TAN(theta...
*Thursday, December 3, 2015 by Jose Luis*

**Physics Check My Work Please**

A 8 kg block is moving with an initial speed of 6 m/s on a rough horizontal surface. If the force is 12 N, approximately how far does the block travel before it stops? *I have: V^2=Vi^2+2ax 0=(6 m/s)^2 + 2(-9.8 m/s^2)(x) -36 m^2/s^2 = -19.6 m/s^2(x) x = 1.83 m. *Is this ...
*Thursday, December 3, 2015 by Jose Luis*

**physics**

two people run a race around a track. One is in the first lane and the other is in the 7th lane. they both start at the same start line. They both finish in the same amount of time, but the runner in the outside lane is determined to be the winner. Wh?
*Wednesday, December 2, 2015 by Anonymous*

**Physics**

In a typical golf swing, the club is in contact with the ball for about 0.0010s. If the 45-g ball acquires a speed of 59m/s, estimate the magnitude of the force exerted by the club on the ball.
*Wednesday, December 2, 2015 by Amanda*

**Physics**

Two ice skaters stand at rest in the center of an ice rink. When they push off against one another the 61-kg skater acquires a speed of 0.63 m/s . If the speed of the other skater is 0.86 m/s , what is this skater's mass?
*Wednesday, December 2, 2015 by Amanda*

**Physics**

A punter drops a .43 kg football from rest vertically 1 meter down onto his foot. The ball leaves his foot with a speed of 18m/s at an angle of 55* above the horizontal. What is the impulse delivered by the foot (magnitude and direction)?
*Wednesday, December 2, 2015 by Rob*

**Physics**

A child and sled with a combined mass of 45.0 kg slide down a frictionless hill. If the sled starts from rest and has a speed of 8.0 m/s at the bottom, what is the height of the hill (include units)?
*Wednesday, December 2, 2015 by Mariah*

**Physics**

You jump from a height of 1.0m from the surface of the Earth. The Earth will actually move a bit as you land. a.) Explain Why b.) Estimate the distance the Earth moves, listing any assumptions you make
*Wednesday, December 2, 2015 by Jack*

**Physics**

A stone is aimed at a cliff of height h with an initial speed of v = 54.0 m/s directed 55.0° above the horizontal, as shown in the Figure below by the arrow. The stone strikes at A, 7.31 s after launching. What is the height of the cliff? What is the maximum height H ...
*Wednesday, December 2, 2015 by Anonymous*

**Physics**

A projectile is fired at 32.5° above the horizontal. Its initial speed is equal to 160.0 m/s. Assume that the free-fall acceleration is constant throughout and that the effects of the air can be ignored. What is the maximum height reached by the projectile?
*Wednesday, December 2, 2015 by Anonymous*

**Physics**

A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 35.0 m above sea level, directed at an angle theta = 46.3° above the horizontal, and with a speed v = 35.8 m/s. Assuming that air friction ...
*Wednesday, December 2, 2015 by Anonymous*

**Physics**

A ball with a mass of 4 kg and a velocity of 10 m/s strikes an 8kg ball that is initially at rest. If the collision is perfectly elastic, what are the velocities of the 4 kg and 8 kg ball after the collision?
*Wednesday, December 2, 2015 by Thomas*

**Physics**

A ski rope operates on a 15° slope of length 65.0 m. The rope moves at 9.7 km/h and provides power for 40.0 riders at one time, with an average mass per rider of 70 kg. Estimate the power required to operate the tow
*Wednesday, December 2, 2015 by Anonymous*

**Physics**

NASA lost contact with Pioneer 10 on January 22, 2003. How far in meters was it from the sun on that date? Pioneer 10 was traveling at 12.24 km/s relative to the sun. Calculate the position of Pioneer 10 as of January 2009 relative to the sun. Pioneer is headed toward the star...
*Wednesday, December 2, 2015 by Madison*

**Physics**

When you drop a 0.27-kg apple, Earth exerts a force on it that accelerates it at 9.8 m/s2 toward Earth's surface. According to Newton's third law, the apple must exert an equal and opposite reaction force on Earth. If the mass of Earth is 5.98 1024 kg, what would be ...
*Wednesday, December 2, 2015 by Anonymous*

**Physics**

Consider the 667 N weight held by two cables shown below. The left-hand cable had tension T2 and makes an angle of θ2 with the ceiling. The right-hand cable had tension 540 N and makes an angle of 55◦ with the ceiling. The right-hand cable makes an angle of 55◦...
*Wednesday, December 2, 2015 by Anonymous*

**Physics**

A molecule consists of two atoms. The atoms have masses of 20 u and 10 u and are 1.08 *10^-10 m apart. How far from the first atom is the center of mass of the molecule? Can someone help please I tried: (20u*(1.08 *10^-10m)) + (10u*(1.08 *10^-10))/ (20u+10u) and just got 1.08...
*Wednesday, December 2, 2015 by John Oben*

**Physics**

The temperature of 2.0 g of helium is increased at constant volume by ΔT. What mass of oxygen can have its temperature increased by the same amount at constant volume using the same amount of heat? I know for constant volume I should use the equation: Q=mCsubvdeltaT I ...
*Wednesday, December 2, 2015 by Joshua*

**Physics**

As usual, a drag coefficient of 0.5 is a reasonable guess. A cyclist going at a steady speed is mostly working to keep drag from slowing them down (rolling friction plays a part but is much smaller). Estimate what the power output is of a cyclist going at 40 km/hr.
*Wednesday, December 2, 2015 by Hermans*

**Physics **

a 100 kg bicycle is riding on the sidewalk at 15m/s when the rider is 20m from the intersection a red light causes her to apply 50N force to stop the bicycle
*Wednesday, December 2, 2015 by Kentucky *

**Physics**

Two ice skaters stand at rest in the center of an ice rink. When they push off against one another the 61-kg skater acquires a speed of 0.63 m/s. If the speed of the other skater is 0.86 m/s, what is this skater's mass?
*Wednesday, December 2, 2015 by Amanda*

**Physics**

As usual, a drag coefficient of 0.5 is a reasonable guess. A cyclist going at a steady speed is mostly working to keep drag from slowing them down (rolling friction plays a part but is much smaller). Estimate what the power output is of a cyclist going at 40 km/hr.
*Wednesday, December 2, 2015 by Daniel*

**Physics**

How long does the stone take to fall from the height of the cliff to the ground below?wit 3seconds after the stone has reached the ground
*Wednesday, December 2, 2015 by Prescilla*

**physics**

What thickness of Pyrex glass would have the same R−factor as a 1.0−cm thick stagnant air pocket?
*Wednesday, December 2, 2015 by kim*

**Physics**

A person who is 1.6 m tall throws a ball with a speed of 6.4 m/s at an angle of 65 degrees above the horizontal. What are the x and y components of the velocity (in m/s) of the ball the instant before it strikes the ground?
*Wednesday, December 2, 2015 by Andy*

**Physics**

A car has wheels with tyres on, which are 75cm in diameter. The car is travelling at a constant speed of 60km/hr. If no slipping is observed between the wheels(tyres) and the road, calculate the angular speed and the acceleration of a stone wedged in the thread of the tyre
*Wednesday, December 2, 2015 by Vincent*

**physics**

A dumbbell has a mass m on either end of a rod of length 2a. The center of the dumbbell is a distance r from the center of the Earth, and the dumbbell is aligned radially. If r≫a, the difference in the gravitational force exerted on the two masses by the Earth is ...
*Tuesday, December 1, 2015 by brooklyn*

**physics sound waves**

A friend in another city tells you that she has two organ pipes of different lengths, one open at both ends, the other open at one end only. In addition, she has determined that the beat frequency caused by the second-lowest frequency of each pipe is equal to the beat ...
*Tuesday, December 1, 2015 by brooklyn*

**Physics**

A 1000Kg car is traveling at 40 m/s. a.) if the car stops in 20 seconds, what is the deceleration rate? b.) what friction force will stop the car in 20 seconds?
*Tuesday, December 1, 2015 by Ellen *

**Physics**

A soccer player kicks the ball toward a goal that is 28.0 m in front of him. The ball leaves his foot at a speed of 19.5 m/s and an angle of 30.6° above the ground. Find the speed of the ball when the goalie catches it in front of the net. (Note: The answer is not 19.5 m/s...
*Tuesday, December 1, 2015 by Anonymous*

**Physics **

1) can the position-time graph for the motion of an object be a horizontal line?explain - so its yes? 2) can the positon-time graph bea vertical line, explain -so its yes
*Tuesday, December 1, 2015 by anonymous *

**Physics **

The position time-graph for the motion of a certain particle is a smooth curve, like a parabola.At a given instant of time the tangent line to t he position-time graph has a negative slope. is the instantaneous velocity of the particle at this time positive, negative, or zero?...
*Tuesday, December 1, 2015 by anonymous *

**Physics **

1) an objects position-time graph is a straight line with a positive slope. is the velocity of this object positive,negative or zero. negative 2) an objects position-time graph is a straight line with a negative slope. is the velocity of this object positive,negative or zero...
*Tuesday, December 1, 2015 by anonymous *

**PHYSICS**

The pressure and volume of an ideal monatomic gas change from A to B to C. From A to B, volume remains 0.400 and pressure rises to 4.00x10^5. From B to C, volume changes from 0.400 to 0.200 while pressure remains the same. There is a curved line between A and C and is an ...
*Tuesday, December 1, 2015 by Coffee*

**physics**

A projectile is fired at 30.0° above the horizontal. Its initial speed is equal to 172.5 m/s. Assume that the free-fall acceleration is constant throughout and that the effects of the air can be ignored. What is the maximum height reached by the projectile? At what time ...
*Tuesday, December 1, 2015 by Kevin*

**Physics**

A person who is 1.1 m tall throws a ball with a speed of 5.2 m/s at an angle of 56 degrees above the horizontal. What are the x and y components of the velocity (in m/s) of the ball the instant before it strikes the ground? The acceleration due to gravity is 10 m/s2
*Tuesday, December 1, 2015 by Kevin*

**Physics**

The launching speed of a certain projectile is 6.8 times the speed it has at its maximum height. Calculate the elevation angle at launching.
*Tuesday, December 1, 2015 by Kevin*

**Physics**

A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 32.0 m above sea level, directed at an angle theta = 46.9° above the horizontal, and with a speed v = 29.6 m/s. Assuming that air friction ...
*Tuesday, December 1, 2015 by Kevin*

**physics **

A 65.5 kg high jumper leaves the ground with a vertical velocity of 8.1 m/s. How high can he jump? The acceleration of gravity is 9.8 m/s2 .
*Tuesday, December 1, 2015 by BROOKE *

**PHYSICS**

Two blocks of masses m1 = 4.5kg and m2 = 6.5kg resting on a frictionless area connected by light inextensible chord as shown. A horizontal force F of 33.0 N directed to the right is applied to m1 as shown. Find (A) acceleration and (B) tension of the chord?
*Tuesday, December 1, 2015 by Camz*

**algebra**

in a class of 30 students , there are 22 students who study chemistry but not physics, 4 who study physics but not chemistry and who study neighter chemistry nor physics. how many students in the class study physics
*Tuesday, December 1, 2015 by judith*

**physics**

to what height should a cylindrical vessel of diameter d be filled with a liquid so that due to force on the verticle surface of the vessel be equal to the force on the bottom
*Tuesday, December 1, 2015 by ash*

**physics**

A friend in another city tells you that she has two organ pipes of different lengths, one open at both ends, the other open at one end only. In addition, she has determined that the beat frequency caused by the second-lowest frequency of each pipe is equal to the beat ...
*Tuesday, December 1, 2015 by eva*

**physics**

A 0.014 kg bullet is fired straight up at a falling wooden block that has a mass of 4.0 kg. The bullet has a speed of 700 m/s when it strikes the block. The block originally was dropped from rest from the top of a building and had been falling for a time t when the collision ...
*Monday, November 30, 2015 by sarah*

**PHYSICS**

a girl walks 1km north in 15min.then walks 200m south west in 60sec.what is her average velocity?
*Monday, November 30, 2015 by bety*

**Physics**

How do you find final kinetic energy?
*Monday, November 30, 2015 by Rebecca*

**Physics**

A radioactive isotope of Bismuth undergoes Beta Decay with a half-life of 22 days. How long (in days) will it take the Activity (A) of the sample to decrease to one-ninth of its original value? Assume that the original activity is A0.
*Monday, November 30, 2015 by Ash*

**Physics**

In a car crash, Car A rear ends Car B that stopped at a red light. After the crash, Car A and Car B meld together moving at a speed of 14 m/s. Car A has a mass of 1750 kg. Car B has a mass of 2000 kg. Calculate the initial momentum of Car A. So far I have Va=? Ma= 1750 kg Vb=0...
*Monday, November 30, 2015 by Rebecca*

**Physics**

1. The problem statement, all variables and given/known data A 2.0-m measuring stick of mass 0.175 kg is resting on a table. A mass of 0.500 kg is attached to the stick at a distance of 74.0 cm from the center. Both the stick and the table surface are frictionless. The stick ...
*Monday, November 30, 2015 by Tyler*

**Physics**

At t = 0 s,a particle of mass 7.08 kg starts from rest at the origin and moves with a velocity v = 6.00t^2i(hat) − 6.00tj(hat) + 6.00k(hat) m/s. 1. What is the angular momentum of the particle at t = 0 s I know angular is calculated from moment of inertia * angular ...
*Monday, November 30, 2015 by Tyler*

**physics **

A box slides down a 30.0 degree ramp with an acceleration of 1.25m/s². Determine the coefficient of Kinetic friction between the box and the ramp. I'm not sure to work it out I draw a picture to see if it would help me but I'm still stuck..
*Monday, November 30, 2015 by Mindy *

**Physics 1100**

Find theta; and W in the figure below where w1 = 21.0 N, w2 = 34.0 N, and α = 64.0°, assuming that the arrangement is at rest.
*Monday, November 30, 2015 by Tess*

**physics**

A pitcher throws a 0.141-kg baseball toward the batter so that it crosses home plate horizontally and has a speed of 42 m/s just before it makes contact with the bat. The batter then hits the ball straight back at the pitcher with a speed of 50 m/s. Assume the ball travels ...
*Monday, November 30, 2015 by king*

**Physics Check my work please**

A mass is attached to a spring is 0.2 kg. The spring's constant is 40 N/m. The mass is stretched to a position of 0.3 m and released. The final position is 0.1 m. #1) Find the change in potential energy of the system. #2) What is the work done by the spring? #1) Change in ...
*Monday, November 30, 2015 by Jose Luis*

**Physics**

Using 3 - 4 complete sentences, explain the role of both types of transformers in getting electric energy from an electric power plant (coal-fired, natural gas or nuclear) to our homes.
*Monday, November 30, 2015 by Alisia*

**PHYSICS !!!**

The diffusion rate for a solute is 4.0 10-11 kg/s in a solvent-filled channel that has a cross-sectional area of 0.50 cm2 and a length of 0.220 cm. What would be the diffusion rate m/t in a channel with a cross-sectional area of 0.30 cm2 and a length of 0.10 cm?
*Monday, November 30, 2015 by myheadhurts*

**Physics**

Using 3 – 4 sentences, explain, in your own words, two ways you could cause an electrical current using only a wire and a horseshoe magnet.
*Monday, November 30, 2015 by Alex*

**Physics**

Five moles of an ideal gas are compressed isothermally from A to B, What is the work involved if the temperature of the gas is 332 K? Be sure to include the correct algebraic sign. GRAPH: wvw.webassign.n3t/cj8/15-fc-009.gif wvw and n3t need to be retyped in their proper form ...
*Monday, November 30, 2015 by Jordan*

**Physics Check My Work Please**

A mass is attached to a spring is 0.2 kg. The spring's constant is 40 N/m. The mass is stretched to a position of 0.3 m and released. The final position is 0.1 m. #1) Find the change in potential energy of the system. #2) What is the work done by the spring? #1) Change in ...
*Monday, November 30, 2015 by Jose Luis*

**PHYSICS**

A MAN RUNS 300M WEST IN 60SEC.THEN RUNS 100M NORTH-WEST IN 20SEC.WHAT IS IT'S AVERAGE VELOCITY IN M/S?
*Monday, November 30, 2015 by BETY*