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July 22, 2014

Homework Help: Science: Physics

Recent Homework Questions About Physics

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physics
With a magnetic field perpendicular to a single 13.2 cm diameter circular loop of copper wire decreases uniformly from .670 T to zero. If the wire is 2.25 mm in diameter how much charge moves past a point in the coil during this operation?
Monday, April 28, 2014 at 6:04pm

physics
Your vertical spring accelerometer has a 40 g mass hanging from it. You climb aboard the roller coaster that starts at rest and watch the accelerometer read 0.45 for 5 seconds while descending the first peak and then change to 2.8 for 2.5 seconds while going through the bottom...
Monday, April 28, 2014 at 5:32pm

physics
A 60 kg stunt person runs off a cliff at 5.3 m/s and lands safely in the river 11.8 m below. What was the splashdown speed?
Monday, April 28, 2014 at 5:20pm

physics
A child and sled with a combined mass of 48.4 kg slide down a frictionless hill that is 7.15 m high. If the sled starts from rest, what is its speed at the bottom of the hill?
Monday, April 28, 2014 at 4:55pm

Physics: Earthquakes
I'm studying for an upcoming exam and I came across this problem: 10 seconds separate the P- and S-wave arrival times of an earthquake which shakes you 1m. How far away is the earthquake epicenter and what is the magnitude? I'm stuck and would really appreciate the ...
Monday, April 28, 2014 at 3:59pm

Physics
Estimate the total amount of translational kinetic energy in a small classroom at normal room temperature. Assume the room measures 5.00mm by 12.0mm by 4.00mm .
Monday, April 28, 2014 at 3:34pm

Physics
What is the total internal energy of 5.00molmol of 30∘C^\circ C He\rm{He} gas and O2\rm{O_2} gas, respectively?
Monday, April 28, 2014 at 3:33pm

Physics waves- check answers please
1. A vibrating point on a spring travels 60 mm during three cycles. What is the amplitude of the vibration? my answer: I got 10 mm but I'm not sure if it is the correct answer. 2. For two connect pendulums to resonate, they must have the same: a) mass b) amplitude c) ...
Monday, April 28, 2014 at 2:50pm

Physics
A sniper fires a bullet at 120 m/s at 30° above the horizontal from the roof top of a 35 m high parking garage. If the bullet strikes the level ground beside the parking garage:
Monday, April 28, 2014 at 2:17pm

Physics
A satellite is placed 39875 m above the Moon's SURFACE. (M=7.35e22 kg, R=1.74e6 m) Find the Period of the satellite in seconds. (assume a circular orbit)
Monday, April 28, 2014 at 11:06am

Physics
A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.
Monday, April 28, 2014 at 11:05am

Physics MCQ - Quick check
A washing machine spin dryer has a period T. In order to triple the centripetal acceleration of the clothes in the dryer the period should be ? 3T A cube of mass 2.0 kg is kept pressed against a vertical wall by applying a horizontal force of 60N. If the coefficient of ...
Monday, April 28, 2014 at 9:41am

Engineering Physics
which of the following is equal to the angular acceleration of a disk? a)first time derivative of angular position b) second time derivative of angular position
Monday, April 28, 2014 at 5:47am

Physics waves- check answers please
1. A vibrating point on a spring travels 60 mm during three cycles. What is the amplitude of the vibration? my answer: I got 10 mm but I'm not sure if it is the correct answer. 2. For two connect pendulums to resonate, they must have the same: a) mass b) amplitude c) ...
Sunday, April 27, 2014 at 9:20pm

physics
The formation of condensation on a glass of ice water causes the ice to melt faster than it would otherwise. If 8.00 g of condensation forms on a glass containing both water and 200 g of ice, how many grams of the ice will melt as a result? Assume no other heat transfer occurs.
Sunday, April 27, 2014 at 9:11pm

physics
A mercury barometer reads 760 mm of Hg on the ground. What will it read on the roof of the Empire State Building? (take the ρair to be 1.29 kg/m3 and the ρHg to be 13600 kg/m3.)(? mm of Hg)
Sunday, April 27, 2014 at 6:54pm

physics
if 20g of steam at 100 c is mixed into 80 g of water at 20 c what is the final temperature if no heat lost
Sunday, April 27, 2014 at 6:22pm

physics
how many gram of ice at 0 c can be melted by the heat released when one gram of steam condense to water at 100 c check my answer please and you deman i am sorry by accident i post it the previous question solution Qcold=-Qhot MLf(ice)=-MlV(water) Mice = -(-0.001*2256000)/(...
Sunday, April 27, 2014 at 5:48pm

Physics
A ammeter is to be constructed using a galvanometer that has a 2.00 mA full-scale deflection and internal resistance of 50.0 ohms. It must be good enough to detect 40 mA, which is the max current. How would one do this? How would you make a voltmeter able to read the largest ...
Sunday, April 27, 2014 at 5:22pm

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.
Sunday, April 27, 2014 at 4:56pm

physics
A 1.50 ✕ 103 kg car starts from rest and accelerates uniformly to 17.1 m/s in 12.7 s. Assume that air resistance remains constant at 400 N during this time. (a) Find the average power developed by the engine. W (b) Find the instantaneous power output of the engine at t...
Sunday, April 27, 2014 at 4:49pm

physics
A highway is made of concrete slabs that are 14.0 m long at 20° C. (a) If the temperature range at the location of the highway is from -17.8° C to +40.8° C, what size expansion gap should be left (at 20° C) to prevent buckling of the highway? (b) How large are ...
Sunday, April 27, 2014 at 3:11pm

Physics
Calculate the number of H2O molecules in a human body of mass 65.9 kg. Assume that, on average, water makes up 62% of the mass of a human body. (Use 1.0 u for the atomic mass of hydrogen, and 16.0 u for the atomic mass of oxygen.)
Sunday, April 27, 2014 at 3:08pm

Physics waves- check answers please
1. A vibrating point on a spring travels 60 mm during three cycles. What is the amplitude of the vibration? my answer: I got 10 mm but I'm not sure if it is the correct answer. 2. For two connect pendulums to resonate, they must have the same: a) mass b) amplitude c) ...
Sunday, April 27, 2014 at 2:41pm

Physics
If a car engine has a power,P. Write an expression for the time it will take to accelerate from w to 4w. Note that P=wt where t is torque.
Sunday, April 27, 2014 at 2:36pm

physics
Indigenous people sometimes cook in watertight baskets by placing hot rocks into water to bring it to a boil. What mass of 500ºC rock must be placed in 4.00 kg of 15.0ºC water to bring its temperature to 100ºC , if 0.0250 kg of water escapes as vapor from the ...
Sunday, April 27, 2014 at 12:19pm

physics
If you pour 0.0100 kg of 20.0ºC water onto a 1.20-kg block of ice (which is initially at −15.0ºC ), what is the final temperature? You may assume that the water cools so rapidly that effects of the surroundings are negligible.
Sunday, April 27, 2014 at 12:09pm

physics
A 0.250-kg aluminum bowl holding 0.800 kg of soup at 25.0ºC is placed in a freezer. What is the final temperature if 377 kJ of energy is transferred from the bowl and soup, assuming the soup’s thermal properties are the same as that of water?
Sunday, April 27, 2014 at 11:20am

physics
How many grams of coffee must evaporate from 350 g of coffee in a 100-g glass cup to cool the coffee from 95.0ºC to 45.0ºC ? You may assume the coffee has the same thermal properties as water and that the average heat of vaporization is 2340 kJ/kg (560 cal/g). (You ...
Sunday, April 27, 2014 at 11:02am

physics
A coin is dropped from the Leaning Tower of Pisa. It starts from rest and falls freely. Neglecting air resistance, compute the coin's position and velocity at 1.0 s, 2.0 s and 3.0 s.
Sunday, April 27, 2014 at 3:11am

Physics
A 1900 kg Oldsmobile traveling south on Abbott Road at 13.6 m/s is unable to stop on the ice covered intersection for a red light at Saginaw Street. The car collides with a 3854 kg truck hauling animal feed east on Saginaw at 9.8 m/s. The two vehicles remain locked together ...
Saturday, April 26, 2014 at 11:04pm

Physics
A disk at rest experiences a constant angular acceleration for t = 85 s, at the end of which it is spinning with a frequency of f = 45 rpm. Please answer the following questions. A)Write an expression for the magnitude of the angular velocity of the disk after the acceleration...
Saturday, April 26, 2014 at 5:30pm

Physics
A mercury barometer reads 760 mm of Hg on the ground. What will it read on the roof of the Empire State Building? (take the ρair to be 1.29 kg/m3 and the ρHg to be 13600 kg/m3.)(? mm of Hg)
Saturday, April 26, 2014 at 3:58pm

physics
A diagram shows two cylinders containing two pistonsA and B. The two cylinders are connected with a tube containing a fluid. The system is similar to the hydraulic braking system of a car. A man pushes down on piston A while piston B has a 10kg mass sitting on it. The surface ...
Saturday, April 26, 2014 at 3:27pm

physics
The drawing shows a top view of a square box lying on a frictionless floor. Three forces, which are drawn to scale, act on the box. Consider an angular acceleration with respect to an axis through the center of the box (perpendicular to the screen). Which one of the following ...
Saturday, April 26, 2014 at 1:05pm

physics
Which one of the following statements describes the condition(s) for which a rigid body is in equilibrium? Only internal forces can be present. The sum of the externally applied forces must be zero, and the sum of the externally applied torques must be zero. Each external ...
Saturday, April 26, 2014 at 1:03pm

physics
explain to me the process doping. what is it? how is it done?
Saturday, April 26, 2014 at 9:07am

physics
can you please explain how the process of doping is conducted.
Saturday, April 26, 2014 at 8:32am

physics
A stone is dropped from the deck of the bridge. The sound of the splash reaches the deck 3 seconds later. If sound travels at 342 m/s in still air, how high is the deck of bridge above the water?
Saturday, April 26, 2014 at 6:17am

Physics
Your teenage kid finally gets his drivers license. He takes off in your brand new car that weighs 2000kg at 47m/s when he hits a parked semi that weighs 40000kg. They plow forward in a perfectly in elastic fashion in the same direction. What is the velocity of the wreck?
Saturday, April 26, 2014 at 2:34am

physics
A projectile is launched vertically from the surface of the Moon with an initial speed of 1210 m/s. At what altitude is the projectile's speed two-fifths its initial value?
Friday, April 25, 2014 at 7:16pm

Physics
Two Train whistles, A and B each have a frequency of 408Hz. A is stationary and B is moving toward the right (away from A) at a speed of 35.0m/s. A listener is between the two whistles and is moving toward the right at a speed of 15.0m/s. What is the frequency from A and B as ...
Friday, April 25, 2014 at 6:51pm

Physics
When subjected to a force of compression, the length of a bone (compression Young's modulus 9.4 x 109 N/m2, tensile Young's modulus 1.6 x 1010 N/m2) decreases by 1.5 x 10-5 m. When this same bone is subjected to a tensile force of the same magnitude, by how much does ...
Friday, April 25, 2014 at 5:51pm

Physics 194
Light of wavelength 630 nm passes through a grating and then onto a screen located several meters from the grating. The 1st order bright band is located 0.26m from the central maximum. Light from a second source produces a band 0.21m from the central maximum. Determine the ...
Friday, April 25, 2014 at 1:38pm

Physics
Light of wavelength 630 nm is incident on a long, narrow slit. a)Determine the angular deflection of the first diffraction minimum if the slit width is 0.020 mm. b)Determine the angular deflection of the first diffraction minimum if the slit width is 0.20 mm. c)Determine the ...
Friday, April 25, 2014 at 1:33pm

Physics
Your teenage kid finally gets his drivers license. He takes off in your brand new car that weighs 2000kg at 47m/s when he hits a parked semi that weighs 40000kg. They plow forward in a perfectly in elastic fashion in the same direction. What is the velocity of the wreck?
Friday, April 25, 2014 at 12:30pm

Physics
In one dimension, a 12 kg ball moving to the right at 9 m/s collides with a 4kg ball moving to the left at 3 m/s. The collision is perfectly elastic. Find the final velocities of both balls.
Friday, April 25, 2014 at 12:27pm

Physics
A 25000kg bowling ball moving at 40 m/s hits a 10000kg bowling ball moving at 25 m/s from behind. It is a perfectly elastic collision, so what are the final velocities of the two balls?
Friday, April 25, 2014 at 12:25pm

Physics
In one dimension, a 5g ball is moving to the right at 7 m/s collides with an 8g ball moving to the left at 4 m/s for a perfectly elastic collision. What is the final velocity of both balls? I just don't understand the whole left and right thing. I have already worked it ...
Friday, April 25, 2014 at 12:22pm

College Physics
Can someone check my answers for two and help me with the third? 1) A mass m at the end of a spring of spring constant k is undergoing simple harmonic oscillations with amplitude A. Part (a) At what positive value of displacement x in terms of A is the potential energy 1/9 of ...
Friday, April 25, 2014 at 11:28am

physics
Why can astronauts jump higher on the surface of the moon than on the surface of the earth? Is it because their legs are stronger? Has the amount of "body matter," i.e., "mass" changed? Do they weigh less on the moon than on earth? Why
Friday, April 25, 2014 at 11:00am

physics
Compute your mass in kilograms (1 pound has a mass of 0.45 kg on Earth) and then your weight in Newton’s for the earth, moon, and several planets. Where are you heaviest?
Friday, April 25, 2014 at 9:55am

physics
When subjected to a force of compression, the length of a bone (compression Young's modulus 9.4 x 109 N/m2, tensile Young's modulus 1.6 x 1010 N/m2) decreases by 1.5 x 10-5 m. When this same bone is subjected to a tensile force of the same magnitude, by how much does ...
Friday, April 25, 2014 at 9:04am

physics
A spring (k = 905 N/m) is hanging from the ceiling of an elevator, and a 4.8-kg object is attached to the lower end. By how much does the spring stretch (relative to its unstrained length) when the elevator is accelerating upward at a = 0.74 m/s2?
Friday, April 25, 2014 at 8:49am

physics
A box is being lowered down a wall at constant speed by a girl, as shown. Her hand is pushing on the edge of the box with 50 N of force at a 45° angle above the horizontal. The box weighs 40 N.
Thursday, April 24, 2014 at 11:03pm

science-physics
a ray of light traveling from the air into crown glass strikes the surface at an angle of 30 degrees. what will the angle of refraction be? please help me!! don't ignore this !
Thursday, April 24, 2014 at 9:33pm

physics
Why electric dipole moment between two charges points from negative to positive charge.
Thursday, April 24, 2014 at 9:02pm

Physics
A satellite is placed 39875 m above the Moon's SURFACE. (M=7.35e22 kg, R=1.74e6 m) Find the Period of the satellite in seconds. (assume a circular orbit)
Thursday, April 24, 2014 at 5:46pm

Physics
A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.
Thursday, April 24, 2014 at 5:44pm

urgent (physics)
A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.
Thursday, April 24, 2014 at 5:03pm

physics
A coin placed on a rotating turn table just slips if it is at a distance of 40cm from the centre if the angular velocity of the turn table is doubled,it will just slip at a distance of
Thursday, April 24, 2014 at 3:46pm

Physics ATTENTION HENRY!
A lifeguard who can swim at 1.2 m/s in still water wants to reach a dock positioned perpendicularly directly across a 550 m wide river. a) If the current in the river is 0.80 m/s, how long will it take the lifeguard to reach the dock? b) If instead she had decided to swim in ...
Thursday, April 24, 2014 at 3:29pm

Physics
1. A small plane can travel at 200 km/h in still air. If a 50.0 km/h wind is coming from the east, determine the ground velocity of the plane if the pilot keeps the plane pointed [N]. 2. A pilot is flying from City A to City B which is 300 km [NW]. If the plane will encounter ...
Thursday, April 24, 2014 at 2:30pm

Physics
A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.
Thursday, April 24, 2014 at 11:52am

Physics
Please explain to me how to do this question!!!!!!! A beam consists of singly ionised neon-20 atoms all travelling at the same speed, 3*10^5 m/s, through a vacuum. As the beam passes through the magnetic field it follows a circular path of radius 0.125m. The force on each of ...
Thursday, April 24, 2014 at 6:58am

physics
Three resistors, each of resistance 6 Ω, are connected in such a way that that they form the three sides of a triangle. What is the equivalent resistance between any two vertices of the triangle?
Wednesday, April 23, 2014 at 11:32pm

physics
ssume all temperatures to be exact. A 0.240-kg coffee cup at 27∘C is filled with 0.200kg of brewed coffee at 96∘C. The cup and the coffee come to thermal equilibrium at 84∘C. Part A If no heat is lost to the environment, what is the specific heat of the cup ...
Wednesday, April 23, 2014 at 8:45pm

physics
A proton moves in a circular path perpendicular to a constant magnetuc field. If the field strengrh of the magnet is increased, does the diameter of the circular path incresse, decrease, or remain the same?
Wednesday, April 23, 2014 at 8:09pm

Physics
A golf ball, mass 0.048 kg, rests on a tee. It is struck by a golf club with an effective mass of 0.225 kg and a speed of 44 m/s. Assuming the collision is elastic, find the speed of the ball when it leaves the tee (remember: you can not assume the club is at rest after the ...
Wednesday, April 23, 2014 at 6:19pm

physics
A mass attached to a spring oscillates with a period of 3.04 s. If the mass starts from rest at x = 0.0420 m and time t = 0, where is it at time t = 2.75 s?
Wednesday, April 23, 2014 at 6:00pm

physics
The planet Jupiter has a satellite, Io, which travels in an orbit of radius 4.220×108 m with a period of 1.77 days. Calculate the mass of Jupiter from this information.
Wednesday, April 23, 2014 at 5:46pm

physics
Assume that the dots in the painting are separated by 1.0 mm and that the wavelength of the light is vacuum= 500 nm. Find the distance at which the dots can just be resolved by (a) the eye and (b) the camera. I know that the resolving equation is (angle)min = 1.22(wavelength...
Wednesday, April 23, 2014 at 5:30pm

Physics
Jack is driving with a pail of water along a straight pathway at a steady 25 m/s when he passes Jill who is parked in her minivan waiting for him. When Jack is beside Jill, she begins accelerating at the rate of 4.0 × 10−3 m/s2 in the same direction that Jack is ...
Wednesday, April 23, 2014 at 5:15pm

Physics
A small plane can travel at 200 km/h in still air. If a 50.0 km/h wind is coming from the east, determine the ground velocity of the plane if the pilot keeps the plane pointed [N].
Wednesday, April 23, 2014 at 5:02pm

physics
(a) A hydrogen atom has its electron in the n = 5 level. The radius of the electron's orbit in the Bohr model is 1.323 nm. Find the de Broglie wavelength of the electron under these circumstances. (b) What is the momentum, mv, of the electron in its orbit?
Wednesday, April 23, 2014 at 3:06pm

physics
Gamma rays (γ-rays) are high-energy photons. In a certain nuclear reaction, a γ-ray of energy 0.306 MeV (million electronvolts) is produced. Compute the frequency of such a photon
Wednesday, April 23, 2014 at 3:05pm

Physics
A small plane can travel at 200 km/h in still air. If a 50.0 km/h wind is coming from the east, determine the ground velocity of the plane if the pilot keeps the plane pointed [N].
Wednesday, April 23, 2014 at 2:28pm

physics
A 225-kg box is pushed horizontally with a force of 620N. If the coefficient of friction is 0.20, calculate the acceleration of the box.
Wednesday, April 23, 2014 at 2:02pm

Physics
could you explain friction in a very easy term please
Wednesday, April 23, 2014 at 1:28pm

Physics
Could you explain these in a very easy term that I could understand, give the definitions of the 3 thing below Static Friction Dynamic Friction Rolling Friction
Wednesday, April 23, 2014 at 1:28pm

physics
Calculate the energy in kcal used by a 53-kg woman who does 55 deep knee bends in which her center of mass is lowered and raised 0.400 m. (She does work in both directions.) You may assume her efficiency is 20%.
Wednesday, April 23, 2014 at 1:23pm

physics
Three tug boats are pulling on a cruise ship with three ropes. Two pull with a force of 1800 N each at angle of [N15°E] and [S24°E]. If the net force on the ship is zero, what must the tension in the third rope be?
Wednesday, April 23, 2014 at 1:19pm

physics
a great amount of water vapor changes phase to become liquid water droplets in the clouds that form a thunder storm. Does this phase change release or absorb energy?
Wednesday, April 23, 2014 at 11:19am

physics
explain why we sweat when it is hot? How does it help us? In terms of heat and temperature what happens
Wednesday, April 23, 2014 at 11:15am

physics
a certain hamornic motion has amplitude of 0.7m and a period of 1.3s.find(a)the frequency of oscillation(b)the maximum velocity(c)the maximum acceleration
Wednesday, April 23, 2014 at 10:43am

physics
The pressure at the bottom of a cylindrical container with a cross-sectional area of 46.5 cm2 and holding a fluid of density 480 kg/m3 is 115 kPa. (a) Determine the depth of the fluid. (b) Determine the pressure at the bottom of the container if an additional 3.00 10-3 m3 of ...
Wednesday, April 23, 2014 at 9:11am

physics
In Figure 20.2 is a velocity selector that can be used to measure the speed of a charged particle. A beam of particles is directed along the axis of the instrument. A parallel plate capacitor sets up an electric field E which is oriented perpendicular to a uniform magnetic ...
Wednesday, April 23, 2014 at 6:42am

PHYSICS AP
The spring in the figure has a spring constant of 1000 N/ m. After being compressed by 15 cm it launches a 200 g block out onto a frictionless horizontal surface. The block then moves up an incline, where the coefficient of friction is 0.20, eventually becoming airborne as it ...
Wednesday, April 23, 2014 at 4:55am

Ap Physics
An escalator in a shopping centre carries people up through a height h at a vertical speed of v, but you’re in a hurry when you step onto it, so you climb the moving steps (each with a height of hs) at a rate of n steps/s. Determine: the amount of chemical energy ...
Wednesday, April 23, 2014 at 3:03am

physics
a cylinder with movable piston contains 40 moles of an ideal gas it is placed in an ice water bath where it reach thermal equilibrium. it is then compressed slowly with 7500 j of work done to compress it to a smaller volume. how much does its internal energy change
Wednesday, April 23, 2014 at 12:05am

Physics
What is the partial pressure of water on a day when the temperature is 25C and the relative humidity is 33% P=___Pa
Tuesday, April 22, 2014 at 11:31pm

physics
First start with an isothermal expansion at 2.0 atm from 1.0 L to 4.0 L. If this now is adiabatically compressed back to its original volume, what is the change in internal energy here? Also what are some examples of these processes
Tuesday, April 22, 2014 at 10:30pm

physics 1
Neutron stars consist only of neutrons and have unbelievably high densities. A typical mass and radius for a neutron star might be 5.6 x 1028 kg and 1.5 x 103 m. (a) Find the density of such a star. (b) If a dime (V = 2.0 x 10-7 m3) were made from this material, how much would...
Tuesday, April 22, 2014 at 10:15pm

physics
A bowling ball encounters a 0.760-m vertical rise on the way back to the ball rack, as the drawing illustrates. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. The translational speed of the ball is 4.43 m/s at the bottom of the rise. ...
Tuesday, April 22, 2014 at 9:58pm

physics
Three objects lie in the x, y plane. Each rotates about the z axis with an angular speed of 4.44 rad/s. The mass m of each object and its perpendicular distance r from the z axis are as follows: (1) m1 = 6.00 kg and r1 = 1.00 m, (2) m2 = 4.50 kg and r2 = 7.10 m, (3) m3 = 3.60 ...
Tuesday, April 22, 2014 at 9:26pm

PHYSics
a child with a mass of 29 kg sits at a distance of 4m from the pivot point of a seesaw. where should a 15 kg child sit to balance the seesaw?
Tuesday, April 22, 2014 at 9:25pm

physics
robin is standing terrified at the end of a diving board, which is high above the water. if robin has a mass of 75 kg and is standing .6m from the board's pivot point, what torque is robin exerting on the board
Tuesday, April 22, 2014 at 9:17pm

physics
The oscillator that generates a wave completes 47 vibrations in 29.2 s. A given crest of the wave travels 382 cm along the rope in a time period of 10.3 s. What is the wavelength?
Tuesday, April 22, 2014 at 9:01pm

Physics
A 10.0g bul let traveling horizontally at 365 m/s strikes and becomes embedded in a 2.25kg block of wood placed on a large table. What will be the speed of the bullet block combination immediately after impact ?
Tuesday, April 22, 2014 at 8:26pm

Physics
A 12,000kg railroad car traveling at 12.0m/s couples with an identical car sitting on the tracks. What is the speed of the joined card?
Tuesday, April 22, 2014 at 8:19pm

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