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March 30, 2017

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Homework Help: Science: Physics

Recent Homework Questions About Physics

Physics
Find speed of sound in air if distance is 170 meters and time is 1.1 second
Saturday, March 4, 2017 by Anonymous

physics
A car tire makes contact with the ground on a rectangular area of 12cm by 18cm and the pressure exerted on the ground by the car is 1.05 x 10^5 Pa . the car mass is ..........
Saturday, March 4, 2017 by hend

Physics
Problem: A fixed 16.2-cm-diameter wire coil is perpendicular to a magnetic field 0.79 T pointing up. In 0.15 s , the field is changed to 0.34 T pointing down. Part A: What is the average induced emf in the coil?
Saturday, March 4, 2017 by Dom

Physics
A 20-cm-diameter circular loop of wire is placed in a 0.57-T magnetic field. Part A When the plane of the loop is perpendicular to the field lines, what is the magnetic flux through the loop? Part B The plane of the loop is rotated until it makes a 42 ∘ angle with the field ...
Saturday, March 4, 2017 by Dom

Physics
An air-filled toroidal solenoid has a mean radius of 15.2 cm and a cross-sectional area of 4.98 cm2 as shown in (Figure 1) . Picture this as the toroidal core around which the windings are wrapped to form the toroidal solenoid. The current flowing through it is 11.5 A , and it...
Saturday, March 4, 2017 by Dom

Physics
The ice point of a faulty mercury in glass thermometer isX degree celcius while its steam point is 85 degree celcius. If the thermometer reads 50 degree celcius when the true temperature is 40 degree celcius, calculate the value of X
Saturday, March 4, 2017 by Sadiq

physics
Object A of mass M is released from height H, whereas object B of mass 0.5M is released from height 2H. What is the ratio of the velocity of object A to that of object B immediately before they hit the ground? A. 1 : 2 B. 1.41 : 1 C. 1 : 1.41 D. 1 : 4 E. 1 : 1
Friday, March 3, 2017 by dali

physics
Mass M1 has twice the mass of M2. M1 and M2 are raised from a height of 5 m to 25 m, and from 14 m to 24 m, respectively. What is the ratio of work done on mass M1 to that done on mass M2? A. 1 : 4 B. 25 : 12 C. 4 : 1 D. 2 : 1 E. 5 : 1
Friday, March 3, 2017 by dali

physics
At what rate is a 60.0-kg boy using energy when he sprints up a flight of stairs 10.0 m high in 8.00 s? A. 75.0 W B. 48.0 W C. 735 W D. 480 W E. 4.80 kW
Friday, March 3, 2017 by dali

physics
A 10-kg mass is moving at a speed of 4.0 m/s. How much work is required to stop the mass? A. 20 J B. 40 J C. 60 J D. 80 J E. 100 J
Friday, March 3, 2017 by dali

physics
Which quantity and unit are INCORRECTLY paired? A. Quantity: F Unit: kg m/s B. Quantity: J Unit: N·s C. Quantity: W Unit: J D. Quantity: P Unit: W E. Quantity: E Unit: kg m2/s2
Friday, March 3, 2017 by dali

physics
In which of the following situations is the most work done on the object? A. Holding a 50 kg object. B. Carrying a 30 kg object down a 40 m long hallway. C. Lifting a 20 kg object 1 m up. D. Carrying a 15 kg object up a flight of stairs. E. Lowering a 25 kg object from a ...
Friday, March 3, 2017 by dali

Physics
p = mv Scenario #4 At a station ,a train weighs approximately 1000kg and is moving at 50m/s on a railway and collides with an incoming train weighing 1000kg and moving at -20m/s. 1)If these two trains stick together and begin to move after having being collided with one ...
Friday, March 3, 2017 by Cheryl

physics 11
a water bomber flying with a horizontal speed of 85m/s at a height of 3000 m drops a load on a fire below. how far in front of the target fire should the load be released?
Friday, March 3, 2017 by sumal

physics 11
a canon is shot horizontally at 15 m/s off a cliff, which is 36m above water. how far away from the cliff should the target enemy boat be when the canon is shot?
Friday, March 3, 2017 by sumal

Physics
Scenario : A truck has a mass of 2000kg and is moving at 50m/s and collides with another truck that has a mass of 2000kg moving at a speed of -20m/s. 1)Is this a sticky or springy collision? 2)What is the total momentum after the collision? 3)If both trucks stick together and ...
Friday, March 3, 2017 by Suzy

Physics
A(n) 0.34 kg soccer ball approaches a player horizontally with a speed of 6.18 m/s. The player illegally strikes the ball with her hand and causes it to move in the opposite direction with a speed of 31.3 m/s . What is the magnitude of the impulse de- livered to the ball by ...
Friday, March 3, 2017 by Kiera

Physics
Three resistors are connected in series across a battery. The value of each resistance and its maximum power rating are as follows: 7.1Ω and 20.9 W, 29.5Ω and 11.4 W, and 13.6Ω and 12.5 W. (a) What is the greatest voltage that the battery can have without one of the ...
Friday, March 3, 2017 by Brooke

physics
Determine the ionization energy required to extract the electron totally out of a hydrogen atom, and put it at rest
Friday, March 3, 2017 by vicky

physics
A 60kg boy climbs 70 fligts of stairs each 20cm high in one minute how much powers is developed?
Friday, March 3, 2017 by physics

physics help please
A double-slit experiment is performed with light from a Helium Neon Laser on two slits 80 micrometers apart. The first bright interference fringe left of the center is spaced 2m from the bright center. How far away from the double slit is the screen? wavelength =632nm What ...
Friday, March 3, 2017 by kailey

Physics
Things around you are emitting infrared radiation that includes the wavelength 1.13 10-5 m. What is the energy of the photons?
Thursday, March 2, 2017 by nichole

Physics PLEASE HELP
The two barges shown here are coupled by a cable of negligible mass. The mass of the front barge is 2.22 ✕ 10^3 kg and the mass of the rear barge is 3.22 ✕ 10^3 kg. A tugboat pulls the front barge with a horizontal force of magnitude 34.0 ✕ 10^3 N, and the frictional ...
Thursday, March 2, 2017 by Haya

physics
After a mishap, an 82.8 kg circus performer clings to a trapeze, which is being pulled to the side by another circus artist, as shown here. (angle for T1 = 15) (angle for T2 = 10) Calculate the tension (in N) in the first rope,T1, if the person is momentarily motionless. (...
Thursday, March 2, 2017 by Haya

Physics
A 35.0 g ball at the end of a string is swung in a vertical circle with a radius of 35.0 cm. The rotational velocity is 212.0 cm/s. (a)Find the tension (in N) in the string at the top of the circle. (b)Find the tension (in N) in the string at the bottom of the circle.
Thursday, March 2, 2017 by Haya

Physics
A car is traveling with constant 20.0 ms for 2.0mins constant rate 0.50 how far can travel for first part of the trip How long does it take for the car to a stop during the decond part of trip How far does it take during second trip What average velocity
Thursday, March 2, 2017 by Anonymous

Physics
A 1500 kg car is combined to another car of mass of 1000 kg by colliding with it at a velocity of 3 cm/sec.Find the velocity of the cars just after their collision.
Thursday, March 2, 2017 by Md shaheen Mahmud

physics
A student pulls a (34) kg box a distance of (13.50) m up a ramp set at 25.8o using a force of (181) N applied parallel to the ramp. Find the efficiency of the ramp. Give your answer in percent (%) and with 3 significant figures.
Thursday, March 2, 2017 by l

Physics
A block of ice of mass 30 kg is at rest atop an inclined plane of vertical height 2 m. It is released and slides down the inclined plane. What is its speed at the bottom of the inclined plane?
Wednesday, March 1, 2017 by Hannah

physics
The 2.0 kg wood box in the figure(Figure 1) slides down a vertical wood wall while you push on it at a 45 ∘ angle. The coefficient of kinetic friction of wood on wood is μk = 0.200. What magnitude of force should you apply to cause the box to slide down at a constant speed...
Wednesday, March 1, 2017 by jjh

Physics
hearing rattles from a snake, a boy make two rapid displacements of magnitude 1.8m and 2.4m in sketches show how the two displacements might add up to give magnitude of 4.2m, 3.0m and 0.6m?
Wednesday, March 1, 2017 by Anonymous

physics
How much work isneeded to stop a 20g bullet moving with a speed of 150m/s
Wednesday, March 1, 2017 by victor

physics
1.00L piston with 1.00 mole of an ideal gas at 298.0K and 1.00bar is isothermally and reversibly compressed to a final volume of 0.200L, the irreversibly expanded in first step to its original volume with an applied pressure of 1.00bar. Calculate the change in heat for the ...
Wednesday, March 1, 2017 by Orbit

Physics
5 moles of ideal gas cloud has an initial pressure of 1.00 bar, initial volume of 100.0L and temperature of 25.0ºC. The cloud expands adiabatically to a final volume of 900.0L. Cp,m= 15.79 J mol-1 K-1 . What is the final pressure and final temperature of the gas cloud? What ...
Tuesday, February 28, 2017 by Orbit

Physics
An ideal gas in a moveable piston is allowed to reversibly expand by slowly heating at constant pressure. a. Derive the equation for the work done reversibly as a function of the initial and final temperatures.( i have used w=-nrtln(v final/v intial) i dont know how can I take...
Tuesday, February 28, 2017 by Carlos

physics newton's third law
Two blocks are attached to opposite ends of a massless rope that goes over a massless, frictionless, stationary pulley. One of the blocks, with a mass of 4.5 kg accelerates downward at 34g.
Tuesday, February 28, 2017 by jjh

Physics
A crazed armadillo with a mass of 60kg stands at the center of a rope which was initially strung horizontally between two poles 50m apart. Its weight causes the rope to sag 1.20m. What is the tension in the rope Solution: 2Tsin(angle) - mg = 0 Tan-1() = 1.2/25 = 2.75° 2Tsin(2...
Tuesday, February 28, 2017 by jjh

Physics
A driver jumps off the 3.0m diving board with an initial velocity of 5.0m/s. (a) Determine the maximum height, (b) The time to reach the maximum height, (c) The time it took to touch the water, and (c) The speed when touching the water.
Tuesday, February 28, 2017 by Martin

Physics
A light wave strikes a lake at an angle of incidence of 65.4 degrees. At what angle of refraction will this wave travel through the lake? (The index of refraction of water is 1.33 and the index of refraction of air is 1.00)
Tuesday, February 28, 2017 by Student12

Physics
A wave with an amplitude of 31 mm interferes with another wave that has the same wavelength, an amplitude of 13 mm. a) What is the maximum amplitude of the resultant wave if the two waves are in phase? b) What is the maximum amplitude of the resultant wave if the two waves are...
Tuesday, February 28, 2017 by Student12

Physics
A water wave with a wavelength of 35.6 cm approaches a wall with a large opening in it. The hole begins to close. What size does the hole in the wall need to be for the wave to noticeably diffract through the hole? Justify your answer.
Tuesday, February 28, 2017 by Student12

physics
Find the length of a pendulum that oscillates with a frequency of 0.25 Hz
Tuesday, February 28, 2017 by Anonymous

Physics
An object is given two initial velocities, one that has a magnitude of 60.0 ms-1 and points along a direction that is 35.0° north of east and the other has a magnitude of 55.0 ms-1 that points 15.0°, also north of east. Determine the resultant velocity of the object.
Tuesday, February 28, 2017 by Sarah

Physics
A plane travels 3 km due north, then 5 km due northeast. Represent these two displacements graphically and determine the resultant displacement by finding is magnitude and direction.
Tuesday, February 28, 2017 by Sarah

physics
A student in the fitness center lifts a weight with m = <81.5> kg from the floor to a height of <2.7> meters in a time of <15.50> seconds. Find the average power exerted by the student during this time. Give your answer in watts (W) and with 3 significant ...
Tuesday, February 28, 2017 by dali

Physics
a truck drives 60 m in 5s, while uniformity slowing to a stop. The average speed during this process is 12 m/s. What is the trucks jnitial speed at the beginning of this process? What is the magnitude of the trucks acceleration during this process? I have the answers I just ...
Tuesday, February 28, 2017 by Maria Garcia

physics
A 25-kg child sits at the top of a 4-meter slide. After sliding down, the child is traveling at 5 m/s. How much PE does he start with? How much KE does he end with? How much energy is lost to friction? if you push a box across the floor with a force of 30 N you push it 15 ...
Monday, February 27, 2017 by Bella

Physics
A car drive straight of the edge of a cliff that is 54m high. The police note that the point of impact is 130m from the base of the cliff. How fast was the car travelling when it went off the cliff.
Monday, February 27, 2017 by Paulyne

Physics
A car drive straight of the edge of a cliff that is 54m high. The police note that the point of impact is 130m from the base of the cliff. How fast was the car travelling when it went off the cliff.
Monday, February 27, 2017 by Anonymous

physics
The eye of a hurricane passes over Grand Bahama Island. It is moving in a direction 77.2 ◦ north of west with a speed of 49.0 km/h. Exactly 2.92 hours later, the course of the hurricane shifts due north, and its speed slows to 22.4 km/h, as shown. How far from Grand Bahama ...
Monday, February 27, 2017 by Anonymous

Physics
A person walking across the room with a constant speed of 2m/s, and they run back with a constant speed of 8m/s. What is their average speed for the trip? I know the answer is 3.2m/s but I need help knowing how it's done. Greatly appreciated!
Monday, February 27, 2017 by Maria Garcia

physics
a car moving at speed of 5 m/s ,accelerates at a constant rate of 2.50 m/s^2 for 5.00s . what is the car final speed
Monday, February 27, 2017 by Dazhani Jarrett

Physics
A person walking across the room with a constant speed of 2m/s, and they run back with a constant speed of 8m/s. What is their average speed for the trip? I know the answer is 3.2m/s but I need help knowing how it's done. Greatly appreciated!
Monday, February 27, 2017 by Maria Garcia

Physics
A car accelerates from zero to 80 mph in 8.0 seconds. What is the average speed during this activity? So I thought to calculate average speed it is S = distance/time So 80/8 would be 10 m/s, but the answer is 40 MPH and I have no clue how :(
Monday, February 27, 2017 by Maria Garcia

Physics
A ball (mass of 0.3kg) is suspended on a string that is attached to the ceiling. The ball is charged with an unknown charge q. Determine the magnitude of the charge on the ball if the electric field strength is 3000N/C, and the string forms an angle of θ = 20° as diagrammed ...
Monday, February 27, 2017 by Anonymous

physics
a force is applied on a piston with radius of 2cm to lift a truck with a mass of 2400 kg sits on a piston with a radius of 180cm what is the magnitude of the applied force?
Monday, February 27, 2017 by HEELLLPPP

Physics Help please
The lecturer with a monotone voice of 440 Hz and you are both 2m away from the long, smooth and tall wall. You will hear sound that comes directly to you from the lecturer along with sound that comes back from the wall on it’s way to reaching you. You need the path here ...
Monday, February 27, 2017 by nina

biology
physics osmosis
Monday, February 27, 2017 by andy

physics
which formular do to use to calculate distace in newton's law if i have height and angle?
Monday, February 27, 2017 by puleng

Physics
Water of mass 200g and temperature 10digrees Celsius is put in a copper calorimeter of mass 80g. Steam from boiler at a normal pressure is passed into the calorimeter for sometime. The total mass of the calorimeter and contents is 283g. The final temperature of the contents is...
Monday, February 27, 2017 by David

Physics
A balloon is filled with a gas which is lighter than air. It is observed to rise in air up to a certain height. State the reason why the balloon stops rising.
Monday, February 27, 2017 by David

Physics
A 231 kg block is released at height h = 3.9 m. The track is frictionless except for a portion of length 6.6 m. The block travels down the track, hits a spring of force constant k = 1624 N/m, and compresses it 1.7 m from its equilibrium position before coming to rest ...
Sunday, February 26, 2017 by Dj

ADVANCED LEVEL PHYSICS
A particle travelling in a straight line with constant acceleration and starting from rest covers 36m in the 5th second.Find the acceleration and the distance traveled in the 6th second
Sunday, February 26, 2017 by JIKU

Physics-Work, Energy, and Power
A 56.9 kg sledder descends an 8.21-meter high hill, encountering a friction force of 11.7 N, Fill in the blanks and determine the speed of the sledder after traveling the 31.7 meters to the bottom of the hill. Top of the hill: KE=0J PE=_ W=_ Work=_ PE=0J KE=_ At the bottom of ...
Sunday, February 26, 2017 by Anonymous

Physics
A ball is shot from the top of a building with an initial velocity of 20 m/s at an angle θ = 39° above the horizontal. If a nearby building is the same height and 55 m away, how far below the top of the building will the ball strike the nearby building?
Sunday, February 26, 2017 by Jen

Physics
A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 9.40 m/s at an angle of 21.0° below the horizontal. It strikes the ground 6.00 s later. (a) How far horizontally from the base of the building does the ball strike the ground...
Sunday, February 26, 2017 by Emily

Physics
Two wires are identical, except that one is aluminum and one is copper. The aluminum wire has a resistance of 0.527Ω. What is the resistance of the copper wire? Take the resistivity of copper to be 1.72 x 10-8 Ω·m, and that of aluminum to be 2.82 x 10-8 Ω·m.
Sunday, February 26, 2017 by Brooke

Physics
A coil of wire has a resistance of 31.8Ω at 28 °C and 55.6Ω at 53 °C. What is the temperature coefficient of resistivity?
Sunday, February 26, 2017 by Brooke

Physics
The place kicker on a football team kicks a ball from ground level with an initial speed of 8.30 m/s at an angle of 19.0° above the horizontal. How long is the ball in the air before it lands on the ground again? You may neglect air resistance.
Sunday, February 26, 2017 by Emily

Physics
A 231 kg block is released at height h = 3.9 m. The track is frictionless except for a portion of length 6.6 m. The block travels down the track, hits a spring of force constant k = 1624 N/m, and compresses it 1.7 m from its equilibrium position before coming to rest ...
Sunday, February 26, 2017 by Dj

Physics
A ball (mass of 0.5kg) is suspended on a string that is attached to the ceiling. The ball is charged with an unknown charge q. Determine the magnitude of the charge on the ball if the electric field strength is 2000N/C, and the string forms an angle of θ = 30°
Sunday, February 26, 2017 by Lenny

physics
Located 10 centimeters apart from each other are two charged particles. Both have equal mass. The second object has a charge that is twice as large as the charge on the first object. They experience a repulsive force of 95N due to the electrical interactions. What is the ...
Sunday, February 26, 2017 by Anonymous

physics
You push a charge of 0.1C through an electric field. Through this process, you do 48 J of work on the charged object. Determine the voltage between where you started and where you ended.
Sunday, February 26, 2017 by Anonymous

physics
At each corner of an equilateral triangle, there is a charge, as diagrammed below. The length of each side of the triangle is .4 meters. Find the net force acting upon q1, given the following values for each of the charges: q1 = −2.00 μC, q2 = 3.00 μC, and q3 = 4.00 μC.
Sunday, February 26, 2017 by Anonymous

physics
A car moving with a speed of 180kmh was brought uniformly to rest by the application of the breaks in 20s. How far did the car travel after the breaks
Sunday, February 26, 2017 by Harrison

Science
A physics student stands in an 64th floor. The students weights 810 N. What is his mass and normal force? Mass is 83? normal force is 810?
Sunday, February 26, 2017 by Boberto

Physics
An ideal spring hangs vertically from the ceiling. When 1.0 kg mass hangs from the spring it is extended 5.0 cm from its relaxed length. A downward external force is now applied to the mass to extend the spring an additional 10 cm. While the spring is being extended by the ...
Sunday, February 26, 2017 by Nicole

Physics
The horizontal surface on which the block slides is frictionless. The speed of the block before it touch the spring is 6.0 m/s. How fast is the block moving at the instant the spring has been compressed 0.15 m? The spring constant, k = 2000 N/m
Sunday, February 26, 2017 by Nicole

physics-sound
A police car moving at 41 m/s is initially behind a truck moving in the same direction at 17 m/s. The natural frequency of the car's siren is 800 Hz. The change in frequency observed by the truck driver as the car overtakes him is __(Hz) Take the speed of sound to be 340m/s.
Sunday, February 26, 2017 by chloe

physics
A person jumps out of a helicopter in mid-air to retrieve a small metal ball. He screams at 475Hz, but people on the ground hear him scream at 578Hz. The person is falling at __(m/s) Once he grabs the metal ball, he is pulled back up to the helicopter at the same speed as he ...
Sunday, February 26, 2017 by chloe

Physics
A bullet with mass (m) is fired vertically into a block of wood with mass (M) that is hanging from a rope at rest. If the billet has an initial speed Vi (initial velocity) find the height (h) that the block will swing into the air after the bullet becomes embedded in it m=0....
Sunday, February 26, 2017 by Stephy

physics
A ball is thrown upward with velocity 5m/s calculate total distance covered by it ?{ Using formulae (v)2 -(u)2. =2gs}
Sunday, February 26, 2017 by Mohasin wani

Physics
An 80g particle moving with an initial velocity of (50m/s)î strikes and sticks to a 60g particle moving at (50m/s)j. How much kinetic energy is lost in this collision?
Sunday, February 26, 2017 by Gorg

physics
A (10.25) kg bowling ball is hung on a (11.50) m long rope. It is then pulled back until the rope makes an angle of (39.0) degrees with the vertical and released. Find the speed of the ball is at the lowest point. Give your answer in m/s and with 3 significant figures.
Saturday, February 25, 2017 by l

Physics
The box is being pulled by a roope across a level floor as shown in the diagram. The box is accelerating at 1 m/s2, the coefficient of kinetic friction is 0.5. what is th tension in the rope?
Saturday, February 25, 2017 by Sarah

Physics help please
excited by the in class experiments you put two speakers in your living room 80cm apart producing a sound of 750Hz. 4.0 m away you place a microphone right on the centerline between the speakers. Will the microphone detect a loud sound or a soft on at this point (relatively to...
Saturday, February 25, 2017 by Naida

PHYSICS
On vacation, your 1400-kg car pulls a 520-kg trailer away from a stoplight with an acceleration of 2.00 m/s2 . A: What is the net force exerted by the car on the trailer? Assume that the positive x axis is directed toward the direction of motion. F = N What force does the ...
Saturday, February 25, 2017 by LISA

PHYSICS
An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction and has a magnitude of 6.2 N ; a second force has a magnitude of 5.0 N and points in the negative y direction Find the magnitude of the third force ...
Saturday, February 25, 2017 by AMY

Physics
you are skiing down a slope angled at 30 degrees to the horizontal. Your acceleration is 2m/s^2. what is the coefficient of kinetic friction between you and the hill?
Saturday, February 25, 2017 by Sarah

Physics
A ball is dropped from a building, after 2 sec another ball is thrown downward. After 6 sec the second ball overtook the first ball. Is the second ball has greater acceleration than the first ball? Explain.
Saturday, February 25, 2017 by Heeelp

help with physics
Excited by the in class experiments you put two speakers in your living room 80cm apart producing a sound of 750Hz. 4.0 m away you place a microphone right on the centerline between the speakers. Will the microphone detect a loud sound or a soft on at this point (relatively to...
Friday, February 24, 2017 by nina

physics help please
The lecturer with a monotone voice of 440 Hz and you are both 2m away from the long, smooth and tall wall. You will hear sound that comes directly to you from the lecturer along with sound that comes back from the wall on it’s way to reaching you. You need the path here ...
Friday, February 24, 2017 by nina

Physics
A 200 gram sample of hot water at 89°C is mixed with 200 grams of cool water at 16°C. Assume there is no loss of heat energy to the surroundings, what is the final temperature of the mixture when they reach thermal equilibrium?
Friday, February 24, 2017 by Kat

Physics
A 100 gram mass of metal at 106°C is placed in 100 grams of cool water at 22°C. The final temperature of the mixture is 25°C. What is the specific heat capacity of the metal?
Friday, February 24, 2017 by Kat

physics
A ball is fired at a speed of 8 m/s at 20˚ above the horizontal from the top of a 5 m high wall. How far from the base of the ball will the ball hit the ground? Also calculate the angle below horizontal the velocity vector makes.
Friday, February 24, 2017 by yara

Physics
The lecturer with a monotone voice of 440 Hz and you are both 2m away from the long, smooth and tall wall.You will hear sound that comes directly to you from the lecturer along with sound that comes back from the wall on it’s way to reaching you.You need the path here needs ...
Friday, February 24, 2017 by josh

physics
An electron is projected horizontally at a speed of 3x10^6 m/s into a uniform electric field 200 N/C produced by two charged plates of width 0.1m (a) find the a cceleration of the electron in the elec field.(b) finn the time takes to travel through the electric field.(c) what ...
Friday, February 24, 2017 by rahidul

physics
Consider a balloon of mass 0.030 kg being inflated with a gas of density 0.54 kgm-3. What will be the volume of the balloon when it just begins to rise in air of density 1.29 kg m-3? [g = 10 ms-2]
Friday, February 24, 2017 by Divine

Physics
A stone with a mass of 20kg and density of 20,000kg/m3 is immersed in water. Find its weight
Thursday, February 23, 2017 by Victory

physics
A ball moving at a velocity of 10 meters/second has a momentum of 8.0 kilogram meters/second. What is its mass?
Thursday, February 23, 2017 by Anonymous

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