Saturday
July 30, 2016

Homework Help: Science: Physics

Recent Homework Questions About Physics

Physics
What is physics
Saturday, July 30, 2016 by Val

Physics
A sled has 300 kg m/s of momentum at point A. At point B the momentum is 375 kg m/s after 2 sec. What force was applied to the sled?
Saturday, July 30, 2016 by BT

Physics
A 75 kg individual runs a 5 m/s and jumps onto a stationary 40 kg wagon. What is the speed of the wagon and individual?
Saturday, July 30, 2016 by BT

Physics
Emma is working in a shoe test lab measuring the coefficient of friction for tennis shoes on a variety of surfaces. The shoes are pushed against the surface with a force of 400 N, and a sample of the surface material is then pulled out from under the shoe by a machine. The ...
Saturday, July 30, 2016 by BT

Physics
Emma is working in a shoe test lab measuring the coefficient of friction for tennis shoes on a variety of surfaces. The shoes are pushed against the surface with a force of 400 N, and a sample of the surface material is then pulled out from under the shoe by a machine. The ...
Saturday, July 30, 2016 by BT

statistics
in a certain college 33% of the physics majors belong to ethnic minorities. if 8 students are selected at random from the physics majors what is the probability that more than 5 belong to an ethnic minority
Saturday, July 30, 2016 by bernie

physics
three equal charges each of 2.0×10^-6 are fixed at three corner of an equilateral triangle of side 5cm .find the coulomb force experience due to other two charges
Friday, July 29, 2016 by jelil

Physics
If a man walks 4 km east and then 5 km south. How far is he from the point where he started?
Friday, July 29, 2016 by Cathy

Physics
A ladder 9 meters long is place a wall t base 2 metera away. What is the height reach by the ladder?
Friday, July 29, 2016 by Cathy

physics
a rock is dropped from a height of 20m above the ground when it hits the ground it leaves a hole 10cm deep with what speed does the rock hit the ground, and what is the magnitude of the rock's deceleration after it hits the ground
Thursday, July 28, 2016 by kevin

physics
find the energy of an x-ray photon which can impact a maximum energy of 50 kev to an electron
Thursday, July 28, 2016 by priyanka

Physics
(a) A narrow beam of light containing yellow (580 nm) and green (550 nm) wavelengths goes from polystyrene to air, striking the surface at a 30.0º incident angle. What is the angle between the colors when they emerge? (b) How far would they have to travel to be separated ...
Wednesday, July 27, 2016 by Elizabeth

hard core physics
A car is at motion.It horns an hears the echo of the sound after 6 sec.find the speed of the car.
Wednesday, July 27, 2016 by j

Physics
A hollow sphere starts from rest and rolls down a hill without sliding. At the bottom of the hill, it has a linear velocity of 5 m/s. What was the height of the hill the sphere rolled down (in meters)?
Wednesday, July 27, 2016 by Rebecca

Physics
A body of volume hundred centimetre cube is immersed completely in water contained in a jar containing water. the weight of the jar and the water before immersion was 700 grams. After immersion weight of the jar and the water will be
Wednesday, July 27, 2016 by Vidhi

Physics
A body of volume hundred centimetre cube is completely immersed in a jar containing water. The weight of the jar and the water before immersion was 700. After immersion weight of jar and water will be
Wednesday, July 27, 2016 by Vidhi

physics
a sky diver jumps out of a plane that is 3000m above ground with an initial upward speed of 6m/s she free falls for 20s (assume there is no wind at this time)before pulling the cord to activate the parachute she then falls to the ground at a constant downward speed of 5m/s, ...
Wednesday, July 27, 2016 by gary

Physics
What is the change in the volume of 1.0 L kerosene, when it is subjected to an extra pressure of 2.0 ×100000 N/m^2 if the density of the kerosene =800kg m^-3 and speed of sound in kerosene is 1300ms^-1
Wednesday, July 27, 2016 by Vidhi

physics
a person in a hot air balloon ascending vertically at a constant rate of 12m/s drops a rock over the side when the balloon is 40 m above the ground, what is the velocity of the rock just before it hits the ground, and how long will it take the rock to reach the ground
Wednesday, July 27, 2016 by gary

Physics
A cubical block of steel of side 'a ' and density 'p'floats on mercury of density with a part of it being submerged. The height of the block above the Mercury level is given by
Wednesday, July 27, 2016 by Vidhi

science(physics)
A bullet of mass 100g moving with20m/sec .Strikes a wooden plank and peretrates up to 20cm.Calculate the resistance offered by the wooden plank.
Wednesday, July 27, 2016 by Raj

Science
What is physics
Wednesday, July 27, 2016 by Yashesh

Physics
Considering a mass-spring system aligned horizontally moving at a velocity v. a) How will the velocity of the mass change if amplitude is doubled. b) How will the velocity of the mass change if the spring constant is quartered? I know the answer to the first one is that it ...
Wednesday, July 27, 2016 by Lost

physics
a person uses a slingshot to launch a rock upward with a velocity of 30m/s how long does it take to reach a height of 20m what maximum height does the rock reach, what is the velocity of the rock at this height, what is the velocity of the rock just before it lands
Tuesday, July 26, 2016 by kyle

physics
a driver starting from rest accelerates at a rate of 1.5m/s^2 for 20s until reaching a certain speed she then continues driving at this constant speed for an additional 20s what maximum speed does the driver attain what total distance does the driver cover during the 40s that ...
Tuesday, July 26, 2016 by kyle

physics
an arrow is shot vertically upward after 2s it is at a height of 36m although this is not necessarily the highest point with what velocity was the arrow shot what is the maximum height reached by the arrow how long is the arrow in flight altogether
Tuesday, July 26, 2016 by craig

physics
the takeoff speed for a large airplane is 180 mi/hr(roughly 80m/s0 the plane is capable of accelerating at a rate of 4m/s^2 assume that the plane starts at rest determine the minimum runway length required for this plane to safely take off a smaller airplane requires a takeoff...
Tuesday, July 26, 2016 by craig

Pure math,physics,life science,geography,life orientation,isizulu and english.
I'm in grade 11 and idon't know what to do couse i want to be a civil engineering so physcal science is a chaleng to me!
Tuesday, July 26, 2016 by Mjoyini saphokazi

physics
A stone is projected vertically upwards with a speed of 30ms from the top of a tower of height 50m. Neglecting air resistance determine the maximum height it reached from the ground.[g=10ms^2]
Tuesday, July 26, 2016 by josh

physics
the mass of a proton is 1836 times the mass of an electron a)a proton is traveling at speed v. at what speed (in terms of v) would an electron have the same kinetic energy as the proton? b) an electron has kinetic energy K. if a proton has the sane speed as the electron. what ...
Tuesday, July 26, 2016 by hey

physics
A car accelerates from rest at 1.0 m/s^2 for 20s along a straight roa, it then moves at a constant speed for half an hour, it then deccelerates uniformly to a stop in 30s. Find the total distance covered by the car.
Tuesday, July 26, 2016 by sophia

Physics
during a race,a dragster is 200 meters from the finish line when something goes wrong and its stops accelerating.it travels at a constant velocity of45 meters per second for 3seconds to try to finish the race.How far from the finish line is the dragster after 3 seconds?
Tuesday, July 26, 2016 by Physics

Physics
A body accelerates uniformly from rest and covers a distance of 180m in 6s. Calculate the magnitude of its acceleration. . solution S=ut+1/2at^2 180=0x6+1/2xax6^2 180=0+a/2x6^2 180-0=36a/2 180=36a/2 180x2=36a 360=36a 360/36=36a/36 10ms^-2=a acceleration is 10ms^-2
Tuesday, July 26, 2016 by Josh

physics
an arrow is shot vertically upward 2 seconds later it is at a height of 42m (this may not be necesarily its highest point)with what velocity was the arrow shot, how long is the arrow in flight altogether
Monday, July 25, 2016 by casey

physics
a rock is dropped from a height of 20m above the ground when it hits the ground it leaves a hole 10cm deep. With what speed does the rock hit the ground, what is the magnitude of the rock's deceleration after it hits the ground
Monday, July 25, 2016 by steve

physics
a train moving at 35m/s slows down to 20 m/s over the course of 1 minute what distance does the train cover during this time, what is the trains acceleration during this time, if the train continued to slow down with the same acceleration how much more time would it take to ...
Monday, July 25, 2016 by steve

physics
a woman drives at a speed of 20m/s for part of a trip and at a speed of 30m/s for the rest of the trip if she spends 10 minutes driving at each speed determine her average speed for the full trip. If instead she drives 10 kilometers at each speed determine her average speed ...
Monday, July 25, 2016 by steve

Physics
There is an outcropping of ice with a large drop to a slope below. A 100kg piece of ice breaks off with a 60kg person on top of it, and falls o the slope below. The piece of ice slides down the slope to the bottom and onto a horizontal portion. It slides to a stop at a ...
Monday, July 25, 2016 by Barry

Physics
Calculate the λSWL for molybdenum, when the accelerating potential is 15 kV
Monday, July 25, 2016 by Sowmi

college physics
A student observes 30 waves traveling down a string in a lab experiment. It takes 10 seconds for the waves to all go by. What is the frequency of the waves (in Hz)?
Monday, July 25, 2016 by Taylor

College physics
Please help me... I have no idea where to begin...A tone of 4000 Hz is being played on a tuning fork. You run toward the tuning fork at 5 m/s. What frequency do you hear? Take the speed of sound to be 343 m/s.
Monday, July 25, 2016 by Taylor

Physics
A projectile has initially the same horizontal velocity as it would acquire if it had moved from rest with uniform acceleration of 3m/s² for 0.5 minute. If the maximum height reached by it is 80m then the angle of projection is[g=10m/s²]
Monday, July 25, 2016 by Projectile

Physics
how many coulombs must be on one object for it to be repelled with a force of 6.0 N by a second charge of 2.0uC at a distance of 1.0 m?
Monday, July 25, 2016 by Kim

Physics
Hello! can someone help me how to solve this problem in MATLAB? SHAFT SUBJECTED TO SINUSOIDAL DISTRIBUTED TORQUE Circular shaft AB has length 3L and is supported by a wall at A, where x=0, and free to rotate at B, where x=3L. A distributed torque per unit length T(x) = t_0*cos...
Monday, July 25, 2016 by simonsay

physics
a body is projected horizontally from height of 78.4 m with a velocity 10 m/s . its velocity after 3 sec
Monday, July 25, 2016 by jayashree

PHYSICS
a bus starts from rest and in 30s it reaches speed of 20m/s.then the speed remains steady for 15s and decreases steadily until it stops 5s later.what the distance covered from strat to finish.
Sunday, July 24, 2016 by Muuka

Physics
Jet of water striking series of radial flat vanes of the wheel is 200 mm and the velocity of the jet is 100 m/s. The velocity of the vanes is 46 m/s Calculate the force exerted on the series of vanes by the jet of water.
Sunday, July 24, 2016 by Herman

physics
three resistors of 2ohm, 3ohm and 4 ohm are connected in (a) series (b) parallel. find the equivalent resistance in each case
Sunday, July 24, 2016 by ganga

Physics
A cyclist moving on a corcular track of radius 40m completes half a revolution in 40 sec. Its average velocity is nearly
Sunday, July 24, 2016 by Khilin

physics
Calculate the momentum of a 100 kg object moving with velocity 10m/s
Sunday, July 24, 2016 by rishabh

physics
Calculate the momentum of a 100 kg object moving with velocity 10m/s
Sunday, July 24, 2016 by rishabh

physics
a pendulum swing with a speed of 1.5 m/s at its lowedt point. How high will it rise before it stops
Sunday, July 24, 2016 by Anonymous

Physics
At what positions is the speed of a simple harmonic oscillator half its maximum? That is, what values of x / X give v = ±vmax/2 , where X is the amplitude of the motion? Hello, I am so confused about this question. I am not really sure where to start. Thank you so much!
Sunday, July 24, 2016 by Elizabeth

physics
if an 80 meter high object placed 2 meter from a convex lens forms an image whose distance from the object is 2 meter; show with the aid of a diagram with appropriate scale the height of the image formed and confirm your answer using mirror law formula?
Saturday, July 23, 2016 by amara

physics
Ball A with a mass of 0.500 kg is moving east at a velocity of 0.800 m/s. It strikes ball B, also of mass 0.500 kg, which is stationary. Ball A glances off B at an angle of 40.0° north of its original path. Ball B is pushed along a path perpendicular to the final path of ...
Saturday, July 23, 2016 by Matt

physics
A 16.0-g bullet is shot into a wooden block at rest with mass 4550 g on a frictionless surface. The bullet strikes and is lodged in the block, causing is to slide at a speed of 1.20 m/s. Find the speed of the bullet (in m/s) before striking the block.
Saturday, July 23, 2016 by Matt

physics
A man walked 10 m north, then 5 m south. What distance did he walk? What is his final displacement?
Saturday, July 23, 2016 by Face off

Physics
A car takes up from west and accelerate uniformly at the rate of 4m/s square until it reaches a velocity of 10m/s. It then maintains this speed for 5secs and later decelerate at the rate of 2m/s square till it reaches its destination a) draw the velocity time graph of the ...
Saturday, July 23, 2016 by Alif

Physics
A weight suspended from an ideal spring oscillates up and down with a period T. If the amplitude of the oscillation is doubled, the period will be ? A. 1.5 T B. 2T C. T/2 D. T E. 4T
Saturday, July 23, 2016 by SAGAR

Physics
If you weigh 670 N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 15.0 km ? Take the mass of the sun to be ms = 1.99×1030 kg , the gravitational constant to be G = 6.67×10−11 N&#...
Friday, July 22, 2016 by Ane

math
In a class,30 students passed in math,20 passed in physics and 8 passed in both. How many students failed in both if the class has 45 students?
Friday, July 22, 2016 by miki

PHYSICS
on a partime job you are asked to bring a cylindrical iron rod of legnth 85.8 cm and diameter 2.85 cm from a storage room to a machinist. will you need a cart? (to answer calculate the weight of the rod.)
Friday, July 22, 2016 by joshua

Physics
Searches related to a stone is projected vertically upward with a speed of 14m/s from a tower 100m high. find the maximum height attained and the speed with which it strikes the ground
Friday, July 22, 2016 by Anonymous

Physics,Mthe
a body of mass is100an objet and volume is 10 .find the density
Friday, July 22, 2016 by Patrick.da.prince

Physics
I need to understand how to calculate the final 2 steps of this problem. Appreciate any help: For a circuit, consisting of a single battery and two light bulbs in parallel, what is the total resistance of the circuit if each light bulb has a resistance of 6.3 ohms? 1/Rt=1/R1+1...
Thursday, July 21, 2016 by Anna

physics
A child pulls a wagon with a force of 16 N by a handle making an angle of 20 degrees with the horizontal. If the wagon has a mass of 4.9 kg, to the nearest hundredth of a m/s2 what is the acceleration of the wagon?
Thursday, July 21, 2016 by llama

Physics
A particle moving along a line that passes through the origin has zero angular momentum about that origin true false
Thursday, July 21, 2016 by SAGAR

Physics
Center of mass of a body coincides with its center of gravity irrespective of its mass and size 1. True 2.False
Thursday, July 21, 2016 by SAGAR

physics
Is torque depends on the choice of origin
Thursday, July 21, 2016 by SAGAR

Physics
Two stars of mass M and 2M, a distance 3x apart rotates in circles about the common center mass "0" The gravitational force acting on the stars is KGM^2/x^2, what is value of K?
Thursday, July 21, 2016 by SAGAR

PHYSICS
A Car Of Mass 280kg Moving With A Velocity Of 30m/s
Thursday, July 21, 2016 by value

physics
You have a mass of 93 kg and are on a 56-degree slope hanging on to a cord with a breaking strength of 156 newtons. What must be the coefficient of static friction to 2 decimal places between you and the surface for you to be saved from the fire?
Thursday, July 21, 2016 by baaaaaa

physics
A skier traveling at 26.2 m/s encounters a 23 degree slope. (a)If you could ignore friction, to the nearest meter, how far up the hill does he go? (b)If the coefficient of kinetic friction in the previous problem was actually 0.11 and the slope 30 degrees, to the nearest meter...
Thursday, July 21, 2016 by clache

physics
if the big piston is 10 times of the sizes of the smaller piston to balance a 500Nload at the big piston (assume that the piston level are the same and the weight of the big piston can be ignored
Thursday, July 21, 2016 by aloyy

Physics or Math
Question: A Toyota car travelled at the rate of 70 km/hour leaves the house 2 hours after a Kia car has left and overtakes it in 5 hours. at what rate was Kia car travelling? what's the formula pls?
Thursday, July 21, 2016 by John

Physics
Question: A Toyota car travelled at the rate of 70 km/hour leaves the house 2 hours after a Kia car has left and overtakes it in 5 hours. at what rate was Kia car travelling? What's the formula?
Thursday, July 21, 2016 by John

Physics
Question: A Toyota car travelled at the rate of 70 km/hour leaves the house 2 hours after a Kia car has left and overtakes it in 5 hours. at what rate was Kia car travelling? What's the Formula pls? Thanks
Thursday, July 21, 2016 by John

physics
a police van moving on a highway with a speed of 30 kmph fired a bullet at a thief car speeding away in the same direction with a speed of 192kmph. if the muzzle speed of the bullet is 150 m per sec. the speed eith which the bullet hit the thief car is
Thursday, July 21, 2016 by Ramakanth

Physics
Question: A Toyota car travelled at the rate of 70 km/hour leaves the house 2 hours after a Kia car has left and overtakes it in 5 hours. at what rate was Kia car travelling?
Thursday, July 21, 2016 by John

Math
In a group of 500 students, 150 are studying physics, 220 are studying biology, and 100 are studying chemistry. At least 25 students are studying more than one of these sciences. What is the greatest possible number of these students that might NOT be studying any of these ...
Wednesday, July 20, 2016 by Anonymous

Physics
The answer "use the right-hand rule" isn't working for my brain. I'd really like to understand how to answer the following: You can make an electromagnet by wrapping wire around a wire and connecting the ends to a battery. If the battery is connected so that ...
Wednesday, July 20, 2016 by Anna

physics
Solar material has a density of about 3*10^-4kg/m^3,and the amount of matter released in a typical CME is around 1*10^15kg. Assuming mu solar material is mu_0, estimate the strength of the magnetic field at the suns surface during typical CME
Wednesday, July 20, 2016 by unknown

physics
An infinitely-long wire with resistivity 2.0*10^-8 ohm*m initially has 1.5 A of "conduction" current flowing through it. When the emf connected to the wire is turned off, this current stops in time of .6ns. Estimate the amount of displacement current created in the ...
Wednesday, July 20, 2016 by Sally

Physics
Two lead spheres at the same temperature have radii in the ratio 1:2.what is the ratio of their heat capacities
Wednesday, July 20, 2016 by Vaishnavi

Physics
Two resistors of 2.0 ohm and 3.0 ohm are connected a) in series b) in parallel, with a battery of 6.0V and negligible internal resistance. For each case draw a circuit diagram and calculate the current through the battery
Wednesday, July 20, 2016 by Bella

physics
A particle is moving along a circular path of radius r, when it makes half a rotation, what is the ratio between its displacement and distance? (a) 2π (b) π (c) π/2 (d) π/4
Wednesday, July 20, 2016 by SAGAR

physics
what is pin hole cemera
Wednesday, July 20, 2016 by musa ezekiel

Physics
In each cycle of its operation, a heat engine expels 2400 J of energy and performs 1800 J of mechanical work. (a) How much thermal energy must be added to the engine in each cycle? (b) Find the thermal efficiency of the engine.
Wednesday, July 20, 2016 by Theaaaa03

Physics
A second's pendulum is taken on the surface of moon where acceleration due to gravity is 1/6th of that of earth.Will the time period of pendulum remain same or increase or decrease?Give a reason.
Wednesday, July 20, 2016 by Yashasvi

Physics
ABC is an equilateral triangle of side 4.0 cm in a vacuum. There are point charges of 8.0C at A and B. Find (a) the potential, (b) the electric field at C.
Wednesday, July 20, 2016 by Hezekiah

college physics
Suppose an aeroplane is moving in the north direction and magnetic field is into the paper .Which part of aeroplane will b positively charged? A-its head B-its left wing C-its tail D- its right wing
Wednesday, July 20, 2016 by Ghulam

physics
a car moving through road what is the direction of force and surface of acting
Wednesday, July 20, 2016 by Anonymous

Physics
A paper ball is dropped from a height of 5 meters above the ground. It hits the ground traveling with a speed of 2 m/s. How much work did air resistance do on the paper ball? I dont know how to start this. PLease help
Wednesday, July 20, 2016 by Jay

Physics
Your ear is capable of differentiating sounds that arrive at the ear just 1.00 ms apart. What is the minimum distance between two speakers that produce sounds that arrive at noticeably different times on a day when the speed of sound is 340 m/s?
Wednesday, July 20, 2016 by Elizabeth

Physics
Horizontal electric power lines supported by vertical poles can carry large currents. Assume that Earth’s magnetic field runs parallel to the surface of the ground from south to north with a magnitude of 0.50××10^-4 Tesla and that the supporting poles are 38 m...
Tuesday, July 19, 2016 by Mike

physics
Moving a magnet inside a coil of wire will induce a voltage in the coil. How is the voltage in the coil increased? by moving the magnet inside the coil of wire more slowly by moving the magnet inside the coil of wire more rapidly by holding the magnet absolutely still by ...
Tuesday, July 19, 2016 by Melissa Duckworth

Physics
I don't understand what formula to use for this question: Points A and B each have an electric potential of +9 V. How much work is required to take 1 mC of charge from A to B? Thank you
Tuesday, July 19, 2016 by Anna

Physics
A bullet fired into a fixed target loses half of its initial velocity in penetrating 15cm. How much further it will penetrate before coming to rest?
Tuesday, July 19, 2016 by Ramakanth

Physics
if body having initial velocity of 10m/s moves with a uniform acceleration 10m/s then the final velocity when it covers a distance
Tuesday, July 19, 2016 by Balaji

Physics
For what values of "a" and "b"will the vectors 2i^_3j^_k^ and ai^+bj^_2k^ be parallel to each other?
Tuesday, July 19, 2016 by Sreedyuti

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Homework Help: Science