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March 27, 2015

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Recent Homework Questions About Physics

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physics
A 6.110 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is μs = 0.455 and the coefficient of kinetic friction is μk = 0.255. At time t = 0, a force F = 16.8 N is applied horizontally to the block. State the ...
Wednesday, December 10, 2014 at 2:50pm

physics
A stunt man 60kg jumps down straight down at bozs below 10m from a balcony and he's going down at a speed of 50km/h. What is the force exerted on the boxs?
Wednesday, December 10, 2014 at 1:02pm

physics
A 145-g baseball travels at 35 m/s toward a baseball player's bat (the bat is the object of reference) and rebounds in the opposite direction at 40 m/s
Wednesday, December 10, 2014 at 12:09pm

Physics
An 11 kg object moves down a 25 degree incline at a constant speed. what is the magnitude of the coefficient of friction? I have m=11.0kg incline = 25 deg but i feel like I am missing one more number in order to calculate
Wednesday, December 10, 2014 at 11:08am

physics
Consider a system of a cliff diver and the earth. The gravitational potential energy of the system decreases by 21,000 J as the diver drops to the water from a height of 32.0 m. Determine her weight in newtons.
Wednesday, December 10, 2014 at 10:45am

Physics
A 1250 kg car traveling at 20 m/s suddenly runs out of gas while approaching the valley shown in the figure below. What will be the car's speed as it coasts into the gas station on the other side of the valley? (Assume that no energy is loss to friction.) file://dd-s-1/...
Wednesday, December 10, 2014 at 9:24am

Physics
Silver pellets with a mass of 1.0 g and a temperature of 85°C are added to 200 g of water at 18°C. How many pellets must be added to increase the equilibrium temperature of the system to 24°C?
Wednesday, December 10, 2014 at 1:52am

physics
A 2 kg lab cart is sliding across across a horizontal frictionless surface at a constant velocity of 4.0 meters per second east. What will be the cart's velocity after a 6.0-newton westward force acts on it for 2.0 seconds and in what direction? Update 2: what i don't...
Wednesday, December 10, 2014 at 12:37am

physics
A wheel is spinning with constant angular velocity the ratio of speed of a point on the end of rim to the speed of point halfway between the centre and the end point of rim is:........?
Wednesday, December 10, 2014 at 12:27am

Physics
Sir can you help me to solve this question on Physics Two persons p and q are standing 100m away from a high wall and seperated by distance d. P claps and q hears two sound (direct and echo) with a time difference of 0.2sec. Find the distance between p and q
Tuesday, December 9, 2014 at 11:49pm

physics
A 1543.1 kg car is traveling at 25.1 m/s when the driver takes his foot off the gas pedal. It takes 5.7 s for the car to slow down to 20 m/s. How large is the net force slowing the car? Answer in units of N
Tuesday, December 9, 2014 at 11:34pm

physics
An archer puts a 0.39 kg arrow to the bowstring. An average force of 196.3 N is exerted to draw the string back 1.28 m. The acceleration of gravity is 9.8 m/s 2 . Assuming no frictional loss, with what speed does the arrow leave the bow? Answer in units of m/s
Tuesday, December 9, 2014 at 10:59pm

physics
an ice skater starts her spin with her arms stretched straight out. She then pulls her armsin close to her body. Assume her moment of inertia when her arms are stretched out is 3.0 kg-m sqaured and it is 2.0 kg-m squared when she pulls them in tight. If she starts her spin at ...
Tuesday, December 9, 2014 at 10:53pm

Physics
Musicians can use beats to tune their instruments. One flute is properly tuned and plays the musical note A at exactly 440Hz. A second player sounds the same note and hears that her flute is slightly "flat" (that is, at too low of a frequency). Playing at the same ...
Tuesday, December 9, 2014 at 10:21pm

physics
A train moving at a constant speed is passing a stationary observer on a platform. a flute player is playing a note with frequency of 940Hz. after the flute has passed, the observer hears the sound frequency of 915Hz. What is the speed of the train? The speed of sound in air ...
Tuesday, December 9, 2014 at 9:51pm

Physics HELP!
A 50-g mass is attached to a spring and undergoes simple harmonic motion. Its maximum acceleration is 15m/s2 and its maximum speed is 3.5m/s . Determine the angular frequency. Determine the spring constant. Determine the amplitude of the motion. how do I find these things?
Tuesday, December 9, 2014 at 9:11pm

physics
A train moving at a constant speed is passing a stationary observer on a platform. a flute player is playing a note with frequency of 940Hz. after the flute has passed, the observer hears the sound frequency of 915Hz. What is the speed of the train? The speed of sound in air ...
Tuesday, December 9, 2014 at 9:09pm

physics
An amusement park ride consists of a rotating circular platform 8.09 m in diameter from which 10 kg seats are suspended at the end of 2.19 m mass less chains. When the system rotates, the chains make an angle of 14.8 ◦ with the vertical. The acceleration of gravity is 9....
Tuesday, December 9, 2014 at 8:09pm

physics
A golf ball rolled off the edge of a table that has a height of 1.25 m and lands 0.48 m away from the table. The golf ball took 0.505 s to hit the ground 0.48 m from the table. What was the horizontal velocity, to the nearest hundredth m/s, of the ball as it rolled off the ...
Tuesday, December 9, 2014 at 7:47pm

Physics
A player passes a 0.600-kg basketball down court for a fast break. The ball leaves the player's hands with a speed of 8.20m/s and slows down to 7.30m/s at its highest point.Ignoring air resistance, how high above the release point is the ball when it is at its maximum height?
Tuesday, December 9, 2014 at 7:47pm

Physics
A ball of mass m is attached to a spring with a spring constant k. The system is attached to a thin vertical axis as shown in Figure 4. In its equilibrium vertical position the spring length is L. The axis starts to rotate with a constant angular frequency ω. Find the ...
Tuesday, December 9, 2014 at 2:59pm

physics
help me thjuis site bloowssssssss
Tuesday, December 9, 2014 at 1:03pm

physics
Hahahahahahaha ha????
Tuesday, December 9, 2014 at 11:57am

physics
an airplane flies 200km from city a to city b east,then 200km south from city b to c,and finally 100km northwest to city d.how far is it from city a to city d.in what direction must the airplane head to return directly to city a from city d?
Tuesday, December 9, 2014 at 10:08am

physics
a fisherman noticed that his boat was lifted by the wter waves about once evry two seconds. He looked at the waves wnd estimated the length of a wave to be a 6cm. He also estimated the vertical distance between the highest point snd the lowest point of the wave to be 0.5m find...
Tuesday, December 9, 2014 at 7:10am

physics
A particle of mass 0.2kg is found to stretch a certain spring by 5.0 cm. a. What is the force constant of the spring? b. By how much will a 1kg mass stretch the spring.
Tuesday, December 9, 2014 at 7:04am

physics
A 17.9 kg block is dragged over a rough, horizontal surface by a constant force of 119 N acting at an angle of 30◦ above the horizontal. The block is displaced 40.7 m, and the coefficient of kinetic friction is 0.111. what is the final speed
Tuesday, December 9, 2014 at 1:07am

physics
A 17.9 kg block is dragged over a rough, horizontal surface by a constant force of 119 N acting at an angle of 30◦ above the horizontal. The block is displaced 40.7 m, and the coefficient of kinetic friction is 0.111. what is the final speed
Tuesday, December 9, 2014 at 12:53am

physics
The stone was thrown through a distance of 80 cm the act of throwing takes approximately 0.064 s. determine the launch velocity of the stone
Tuesday, December 9, 2014 at 12:34am

general physics
An axle of a mass of 10 kg, length 10 cm and radius .1 m is free to rotate about the axis which runs the length of the axle, throuhh it's center. A chain of mass 4kg is fastened to the axle at one end, wound exactly 6 times around the axle, and a rock of mass 1.8 kg ...
Tuesday, December 9, 2014 at 12:01am

physics
Assuming 100% transfer of energy in the system, please calculate maximum KE (Kinetic Energy) that the rocket has if the rocket were to again a height of 25 meters. Rocket mass = 0.5 kilograms, and gravity = 9.8 m/s^2
Monday, December 8, 2014 at 11:18pm

physics
Both drawings show the same square, each of which has a side of length L = 0.86 m. An observer O is stationed at one corner of each square. Two loudspeakers are located at corners of the square, as in either drawing 1 or drawing 2. The speakers produce the same single-...
Monday, December 8, 2014 at 10:42pm

physics I
A lost shipping container is found resting on the ocean floor and completely submerged. The container is 5.4 m long, 2.3 m wide, and 2.4 m high. Salvage experts attach a spherical balloon to the top of the container and inflate it with air pumped down from the surface. When ...
Monday, December 8, 2014 at 8:35pm

Physics
A 2.3 × 103 kg car accelerates from rest under the action of two forces. One is a forward force of 1141 N provided by traction between the wheels and the road. The other is a 947 N resistive force due to various frictional forces. How far must the car travel for its ...
Monday, December 8, 2014 at 8:29pm

AP physics
A 2.84 × 103 kg car requires 5.4 kJ of work to move from rest to some final speed. During this time, the car moves 20.4 m. Neglecting friction, find a) the final speed.
Monday, December 8, 2014 at 8:20pm

physics
a movie last 2 hours. during that time what is the angular displacement of each of the following? a.the hour hand b.the minute hand c.the second hand
Monday, December 8, 2014 at 7:46pm

physics help please please please!!!
A spaceship lands on a new planet. the crew decides to measure the speed of sound in the planets atmosphere. taking a tube with a length of 50 cm, they find that one resonant frequency occurs at 2,520 Hz, and the next resonant frequency at 2,940 hz. what is the speed of the ...
Monday, December 8, 2014 at 7:06pm

physics
A movie lasts 2 hours. During that time, what is the angular displacement of each of the following? a.the hour hand b.the minute hand c.the second hand
Monday, December 8, 2014 at 6:57pm

statics/physics
The uniform 10-kg ladder in the figure rests against the smooth wall at B, and the end A rests on the rough horizontal plane for which the coefficient of static friction is 0.3. determine the angle of inclination of the ladder and the normal reaction at b if the ladder is on ...
Monday, December 8, 2014 at 5:26pm

Physics
A weight of 690 N is held by two cables. The left-hand cable had tension T2 and makes an angle of 41◦ with the ceiling. The right-hand cable had tension T1 and makes an angle of 42◦ with the ceiling. What is the tension in the cable labeled T1 slanted at an angle ...
Monday, December 8, 2014 at 5:10pm

Physics
Consider the 690 N weight held by two cables. The left-hand cable had tension T2 and makes an angle of 41◦ with the ceiling. The right-hand cable had tension T1 and makes an angle of 42◦ with the ceiling.
Monday, December 8, 2014 at 4:28pm

physics
A 75-g piece of aluminum at 89 °C is dropped in 1.0 L of water at 1.3 101 °C, which is in an insulated beaker. Assuming that there is negligible heat loss to the surroundings, determine the equilibrium temperature of the system
Monday, December 8, 2014 at 3:54pm

Physics
A box of books weighing 337 N is shoved across the floor by a force of 467 N exerted downward at an angle of 35° below the horizontal. (a) If μk between the box and the floor is 0.56, how long does it take to move the box 4.00 m starting from rest? 2.518 s (b) What is...
Monday, December 8, 2014 at 10:56am

Physics
A hockey puck is hit on a frozen lake and starts moving with a speed of 13.80 m/s. Exactly 5.1 s later, its speed is 7.80 m/s. (a) What is the puck's average acceleration? m/s2 (b) What is the coefficient of kinetic friction between the puck and the ice?
Monday, December 8, 2014 at 9:13am

Physics
A 2.84 kg block starts from rest at the top of a 30° incline and accelerates uniformly down the incline, moving 1.92 m in 1.90 s. (a) Find the magnitude of the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (...
Monday, December 8, 2014 at 8:59am

Physics
A box of books weighing 337 N is shoved across the floor by a force of 467 N exerted downward at an angle of 35° below the horizontal. (a) If μk between the box and the floor is 0.56, how long does it take to move the box 4.00 m starting from rest? s (b) What is the ...
Monday, December 8, 2014 at 8:34am

Physics
A 2.0 kg mass starts from rest and slides down an inclined plane 7.9 ✕ 10-1 m long in 0.64 s. What net force is acting on the mass along the incline? N
Monday, December 8, 2014 at 8:25am

physics
Two forces are applied to a car in an effort to accelerate it, as shown below. The first force, F1 = 400 N, is applied at an angle α = 32° to the forward dashed line. The second force, F2 = 536 N, is applied at an angle β = 10° to the forward dashed line. (a...
Monday, December 8, 2014 at 7:29am

Physics
In one of your rigorous workout sessions, you lost 140 g of water through evaporation. Assume that the amount of work done by your body was 3.8 105 J and that the heat required to evaporate the water came from your body. (a) Find the loss in internal energy of your body (due ...
Monday, December 8, 2014 at 2:20am

Physics
Suppose 0.015 kg of steam (at 100.00 °C) is added to 0.20 kg of water (initially at 14.0°C). The water is inside an aluminum cup of mass 40 g. The cup is inside a perfectly insulated calorimetry container that prevents heat exchange with the outside environment. Find ...
Monday, December 8, 2014 at 2:19am

Physics
When a 34-m-long metal pipe is heated from 13 °C to 39 °C, it lengthens by 2.56 cm. Determine the linear expansion coefficient. I tried to start by taking the difference of temperature times the length of the pipe and finally divide 2.56 by the number i got before but ...
Monday, December 8, 2014 at 1:57am

physics help!
The earth attracts a large flying bug toward its center with a force of 0.10 Newtons. With what force does the bug attract the earth itself? 1. 1.0 N 2. 0.10 N 3. Trillions of Newtons 4. 10 N 5. We need the mass of the bug. 6. Zero; the earth attracts the bug, not the ...
Monday, December 8, 2014 at 12:52am

physics
The sum of two forces, one having a magni- tude of 9 N acting due east and other having a magnitude of 4 N acting due north is
Monday, December 8, 2014 at 12:23am

physics
A 600 kg car is moving on a level road at 30 m/s. How large of a braking force is needed to stop it in a distance of 75m?
Monday, December 8, 2014 at 12:21am

physics
The earth attracts a large flying bug toward its center with a force of 0.10 Newtons. With what force does the bug attract the earth itself?
Monday, December 8, 2014 at 12:19am

physics
Two people, one twice as massive as the other, try to play tug of war on a nearly frictionless, level, icy surface. When they begin to tug, they are 12 m apart. They tug by pulling the rope hand over hand, until their hands meet along the rope. How far does the heavier person ...
Monday, December 8, 2014 at 12:16am

Physics
A block is at rest on an inclined plane. 63 kg µs = 0.47 èc Find the critical angle, èc, at which the block just begins to slide. Answer in units of ◦
Sunday, December 7, 2014 at 11:55pm

physics
A staging that weighs Wstaging supports a painter weighing 160 N. The reading on the left scale is 700 N and the reading on the right scale is 620 N. 700 N 620 N What is the weight of the staging? Answer in units of N
Sunday, December 7, 2014 at 11:33pm

Physics
A uniform rod pivoted at one end (point O) is free to swing in a vertical plane in a grav- itational field, held in equilibrium by a force F at its other end. The rod of length 7 m and weight 4.7 N makes an angle 39◦ with the hor- izontal and the force an angle of 54&#...
Sunday, December 7, 2014 at 11:21pm

Intro-Physics Help Please
A spaceship lands on a new planet. the crew decides to measure the speed of sound in the planets atmosphere. taking a tube with a length of 50 cm, they find that one resonant frequency occurs at 2,520 Hz, and the next resonant frequency at 2,940 hz. what is the speed of the ...
Sunday, December 7, 2014 at 11:15pm

physics
an object explode and a to 2 kilograms piece moves north at 4 m/s and a 4 kilograms piece moves East at 1.5 meters per second. What is the momentum of the third piece? What is the mass of the third piece if it moves at a speed of 4 meters per second?
Sunday, December 7, 2014 at 11:09pm

Physics
A block is at rest on an inclined plane. The mass is 44 kg. µs = 0.54 Find the critical angle, θc, at which the block just begins to slide. Answer in units of ◦
Sunday, December 7, 2014 at 8:40pm

physics
Two artifacts in a museum display are hung from vertical walls by very light wires. Wire T1 is horizontal from the left wall and goes to a center weight of 177N and wire T2 is at a 53 degree angle with the right wall heading from right to left downwards towards the center ...
Sunday, December 7, 2014 at 7:51pm

physics
What is the gravitational acceleration on a planet where a 2.0 kg mass has a weight of 16 N on the planet`s surface?
Sunday, December 7, 2014 at 7:49pm

Physics
A 7.68 m, 132 kg uniform ladder rests against a smooth wall. The coefficient of static fric- tion between the ladder and the ground is 0.642, and the ladder makes a 48.4◦ angle with the ground. How far up the ladder can a 528 kg person climb before the ladder begins to ...
Sunday, December 7, 2014 at 7:28pm

Physics
What air temperature will feel four times as warm as 0 °F?
Sunday, December 7, 2014 at 7:25pm

physics
An egg rolls off a kitchen counter and breaks as it hits the floor. The counter is 1.0 m high, the mass of the egg is about 50 g, and the time interval during the collision is about 0.010 s. How large is the impulse that the floor exerts on the egg? use equations of motion to ...
Sunday, December 7, 2014 at 6:47pm

Physics
A roller coaster goes 40-m along a section of track sloping 10 degrees below the horizontal, followed by a 13-m section sloping upward at 6 degrees, followed by an 26-m section of level track. Find the net displacement in m.
Sunday, December 7, 2014 at 5:27pm

physics
Two artifacts in a museum display are hung from vertical walls by very light wires. Wire T1 is horizontal from the left wall and goes to a center weight of 177N and wire T2 is at a 53 degree angle with the right wall heading from right to left downwards towards the center ...
Sunday, December 7, 2014 at 5:26pm

Physics
Electrons in an oscilloscope are deflected by two mutually perpendicular electric fields in such a way that at any time t the displacement is given by x = Acos(t), y=Acos(t+). Describe the path of the electrons and determine its ...
Sunday, December 7, 2014 at 4:09pm

Physics
A 4.0-kg block extends a spring 16 cm from its unstretched position. The block is removed and a 0.50-kg body is hung from the same spring. If the spring is then stretched and released, what is period of oscillation?
Sunday, December 7, 2014 at 4:08pm

Physics
A 1000-kg car has four 10-kg wheels. What fraction of the total kinetic energy of the car is due to rotation of the wheels? Assume that the wheels have the same rotational inertia as disks of the same mass and size. Explain why you do not need to know the radius of the wheels?
Sunday, December 7, 2014 at 4:05pm

Physics
A woman runs up a flight of stairs. The gain in her gravitational potential energy is 6500 J. If she runs up the stairs at half the speed, what is her gain in gravitational potential energy?
Sunday, December 7, 2014 at 2:46pm

Physics
. How much potential energy does the 2.5 kg rock sitting on an 18 –meter high cliff have?
Sunday, December 7, 2014 at 2:43pm

Physics
As part of a safety investigation, two 1200kg cars traveling at 24m/s are crashed into different barriers. Find the average force exerted on the car that hits a concrete barrier and takes 0.16s to stop.
Sunday, December 7, 2014 at 11:51am

physics
A contestant in a winter games event pushes a 41.0 kg block of ice in the positive direction across a frozen lake as shown in the Figure (a). The coefficient of static friction is 0.1 and the coefficient of kinetic friction is 0.03.
Sunday, December 7, 2014 at 11:38am

Physics
A spaceship of mass 2.0×106kg is cruising at a speed of 4.6×106m/s when the antimatter reactor fails, blowing the ship into three pieces. One section, having a mass of 5.2×105kg , is blown straight backward with a speed of 2.2×106m/s . A second piece, ...
Sunday, December 7, 2014 at 11:17am

Physics
A 24g ball of clay traveling east at 3.3m/s collides with a 33g ball of clay traveling north at 2.4m/s . 1a)What is the movement direction of the resulting 57g blob of clay? 1b)What is the speed of the resulting 57g blob of clay?
Sunday, December 7, 2014 at 11:15am

physics
: stand with one arm and side of one foot pressed agaonst a wall.can you raose the other leg side ways? if not,why not
Sunday, December 7, 2014 at 9:15am

physics
Define Newton's first law .
Sunday, December 7, 2014 at 8:40am

physics
Newton first law provides the measure of ???
Sunday, December 7, 2014 at 8:37am

physics
a metre ruler balances itself at 58 cm mark when a weight of 20 gf is suspended from one end. what is tge weight of the metre ruler?
Sunday, December 7, 2014 at 4:33am

Physics
A sign that weighs 670N is mounted at the end of a 2.00-m long rod of negligible weight. The supporting cable is connected at angle theta=30deg to the center of the rod. What is a) the tension T in the supporting cable, and b) the horizontal and vertical components of the ...
Sunday, December 7, 2014 at 12:36am

physics
A 265g mass attached to a horizontal spring oscillates at a frequency of 1.00Hz . At t =0s, the mass is at x= 4.20cm and has vx = − 1*.0cm/s. Determine the position at t= 3.60s. So I already found that... The period is 1.0000 s The angular frequency is 6.2832 rad/s The ...
Saturday, December 6, 2014 at 11:57pm

Physics
1) Planet Zero has a mass of 5.0*10^23 kg and a radius of 2.0*10^6 meters. What is the acceleration of gravity on planet zero? 2)Phobos, a satellite of Mars, has a radius of 11km and a mass of 10^16 kg. Its a bit lumpy, but let's assume its spherical to get a doable ...
Saturday, December 6, 2014 at 11:36pm

Physics
1) Determine the force of gravitational attraction between the earth(m=5.98*10^24kg) and a 70-kg physics student if the student is in an airplane at 4.950 meters above the earth's surface.
Saturday, December 6, 2014 at 11:32pm

Physics
A dart gun is aimed horizontally at the center of a large target 150 m away. The initial velocity of the dart is 450 m/s. (Ignore air resistance) a) Where does the dart strike the target (relative to the center of the target)? b) To hit the center of the target the dart must ...
Saturday, December 6, 2014 at 8:09pm

Physics
Two noises produce sound levels of 70 and 80 dB when acting separately. Find the sound level in dB when the sources act together.
Saturday, December 6, 2014 at 7:08pm

Physics Electric
The electric potential in a region is given by V(x,y,z) = -10.0x^2 + 20.0xyz + 6.0y^3 a) Find the electric field that produces this potential? b) Find the amount of charge contained within a cubic region in space 20 cm on a side and centered at the point (10.0 cm, 10.0 cm, 10....
Saturday, December 6, 2014 at 6:47pm

physics I
A spherical reservoir that contains 4.55 105 kg of water when full. (h = 7.70 m.) The reservoir is vented to the atmosphere at the top. For a full reservoir, find the gauge pressure that the water has at the faucet in each house. Ignore the diameter of the delivery pipes. (The...
Saturday, December 6, 2014 at 6:36pm

Physics
bobpursley, is answering questions on this all you do?
Saturday, December 6, 2014 at 4:19pm

Physics
The force required to stretch a spring varies directly with the amount the spring is stretched. A force of 29 pounds is needed to stretch a spring 39 inches. How much force is required to stretch the spring 27 inches? Answer in units of lb
Saturday, December 6, 2014 at 4:13pm

Physics
Two forces are applied to a car in an effort to accelerate it, as shown below. The first force, F1 = 400 N, is applied at an angle α = 32° to the forward dashed line. The second force, F2 = 536 N, is applied at an angle β = 10° to the forward dashed line. (a...
Saturday, December 6, 2014 at 4:06pm

PHYSICS : I NEED HELP PLEASE
a 33 kg lawnmower is pulled by a 100N force on flat ground. The handle makes a 10 degree angle with the ground. The coefficient of friction between grass and lawnmower wheels is 0.10. Calculate normal force, force of friction and acceleration
Saturday, December 6, 2014 at 3:18pm

Physics: need detailed answer
a 33 kg lawnmower is pulled by a 100N force on flat ground. The handle makes a 10 degree angle with the ground. The coefficient of friction between grass and lawnmower wheels is 0.10. Calculate normal force, force of friction and acceleration
Saturday, December 6, 2014 at 2:52pm

Physics
Two artifacts in a museum display are hung from vertical walls by very light wires. Wire T1 is horizontal from the left wall and goes to a center weight of 177N and wire T2 is at a 53 degree angle with the right wall heading from right to left downwards towards the center ...
Saturday, December 6, 2014 at 2:27pm

Physics
A student uses a 2.00-m-long steel string with a diameter of 0.90 mm for a standing wave experiment. The tension on the string is tweaked so that the second harmonic of this string vibrates at 22.0Hz . (ρsteel=7.8⋅103 kg/m3) If you wanted to increase the first ...
Saturday, December 6, 2014 at 12:46pm

physics
what impulse is needed to slow a 45kg object from 15m/s to 12m/s?
Saturday, December 6, 2014 at 12:23pm

physics
steven throws a 3.5kg ball at a speed of 25m/s. what is the momentum of the ball? Please show work
Saturday, December 6, 2014 at 12:09pm

physics
Assume all temperatures to be exact, and neglect significant figures for small changes in dimension. A diver releases an air bubble of volume 4.0cm3cm^3 from a depth of 16mm below the surface of a lake, where the temperature is 8.0∘C. What is the volume of the bubble ...
Saturday, December 6, 2014 at 10:59am

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