Tuesday
September 2, 2014

Homework Help: Science: Physics

Recent Homework Questions About Physics

Post a New Question | Current Questions

College Physics
A force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete exerts on the ground as a function of time. Starting from rest, a 60.0 kg athlete jumps down onto the platform from a height of 0.600 m. While she is in contact...
Thursday, April 10, 2014 at 12:34pm

College Physics
An astronaut of mass 84.0 kg is taking a space walk to work on the International Space Station. Because of a malfunction with the booster rockets on his spacesuit, he finds himself drifting away from the station with a constant speed of 0.570 m/s. With the booster rockets no ...
Thursday, April 10, 2014 at 12:33pm

College Physics
Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this? Many people imagine that the collision force exerted on the car is much greater than that experienced by...
Thursday, April 10, 2014 at 12:32pm

physics help!
A uniform stationary ladder of length= 5.1 m and mass= 15 kg leans against a smooth vertical wall, while its bottom legs rest on a rough horizontal floor. The coefficient of static friction between floor and ladder is μ = 0.41. The ladder makes an angle θ = 51° ...
Thursday, April 10, 2014 at 11:23am

College physics
dockworker applies a constant horizontal force of 80.0N to a block of ice on a smooth horizontal floor. thhe block starts from rest and moves 11.0m in 5.00s. (a) what is the mass of the ice block? (b) if the work stops pushing at the end of the 5.00s, How far does the block ...
Thursday, April 10, 2014 at 11:07am

physics
a rod is having a positive charge and a point charge is placed at a distance 'd' from it making angle 45 degree with one end and 37 degree with the other.calculate field. plz answer its urgent.
Thursday, April 10, 2014 at 9:37am

physics
A 0.527 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plunger, and comes to rest some distance above the plunger. The plastic tube has an inner radius of 7.07 mm, and is frictionless. Neither the plunger nor...
Thursday, April 10, 2014 at 4:08am

physics
A hydraulic lift has a leak so that it is only 6.0 × 101% efficient in raising its load. If the large piston exerts a force of 1.00 × 102 N when the small piston is depressed with a force of 15 N and the radius of the small piston is 18 cm, what is the radius of ...
Thursday, April 10, 2014 at 3:31am

physics
Which one of the following situations are likely to involve turbulent flow? a 1 micrometer microbe swimming in water at 30 micrometers per second a 1 millimeter bug crawling on the windshield of a car that is travelling at 30 m/s a 10 micrometer blood cell moving through a ...
Thursday, April 10, 2014 at 2:31am

physics
An aeroplane flying at 350km/h in a direction of N 40 degrees E strike a wind blowing from N 50 degrees W at 75km/h calculate the resulting velocity of the aircraft? need help trying to work this out. please. any help would be great.
Wednesday, April 9, 2014 at 10:30pm

PHYSICS
100turns of insulated wire are wraped around a wooden cylindrical core of cross-sectional area 12cm2. The two ends of the wire are connected to a resistor. The total circuit resistance is 13Ω. If an externally applied uniform magnetic field along the core changes from 1....
Wednesday, April 9, 2014 at 7:50pm

Physics
A 100 g mass is attached and wrapped around an apparatus at a constant radius of 10 cm. The hanging mass is dropped and obtains a speed of 0.2 m/s after 1 m. Using energy considerations, what is the moment of inertia of the apparatus?
Wednesday, April 9, 2014 at 7:43pm

physics
When kicking a soccer ball (0.35kg), the time of contact is usually about 5ms. What average kicking force would be required to attain a ball velocity of 110 km/hr if the ball is initially at rest?
Wednesday, April 9, 2014 at 7:32pm

physics
Two hockey players collide at center ice. Player 1 m = 70 kg Vi= 10 m/s7. Player 2 m = 90 kg Vi= - 3 m/s + 4 m/s If the two players become tangled up and travel together, what is their final velocity?
Wednesday, April 9, 2014 at 7:32pm

physics
Given the same exerted force (130N) exerted over 2s on two javelins of different mass (javelin1 = 1.2 kg; javelin2 = 1.6 kg), what is the kinetic energy of each javelin?
Wednesday, April 9, 2014 at 7:30pm

physics
Show that the acceleration is 7.5 m/s2 for a ball that starts from rest and rolls down a ramp and gains a speed of 30 m/s in 4 s
Wednesday, April 9, 2014 at 7:25pm

physics
An angry student (upset over his mid-term mark) throws an orange at his TA. The orange (m = 160 g) hits the TA in the head and comes to rest in 0.06s. If the skull can undertake a force of 1100N before the brain is damaged, how fast must the orange be traveling?
Wednesday, April 9, 2014 at 5:39pm

physics
James (80kg) is performing a bungee jump from a 210m high dam. He has a free fall for 160 meters until the rope starts to extend and stops 1 meter above ground. What is the stiffness of the bungee rope? How much work does the bungee rope perform?
Wednesday, April 9, 2014 at 5:38pm

physics
A soccer goalie (m = 65 kg) collides with the goalpost. If she was moving at 8 m/s and comes to rest in 1⁄2 a second, determine: a) The impulse the post exerts on the player. b) The impulse the goalie exerts on the post. c) The average force exerted by the post. d) The ...
Wednesday, April 9, 2014 at 5:36pm

Physics
A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis
Wednesday, April 9, 2014 at 4:04pm

Physics
The circus has come to town, and Lael the Magnificent will kick a grape into her assistant's waiting mouth (not to worry − the grape is freshly washed). She starts at the origin and boots the grape at an angle 20.0° east of north. The grape starts from a height ...
Wednesday, April 9, 2014 at 2:32pm

physics
Mary is standing at a place such that she makes an angle of 42° to the right of the normal of a mirror. Where should Mary's mom stand so that she can best see Mary's reflection in the mirror?
Wednesday, April 9, 2014 at 2:32pm

Physics
Suppose you make an electromagnet with a copper wire and a battery by putting the two ends of the wire on the two ends of the battery. If you switch the side of the battery, are you changing the magnetic poles of the wire?
Wednesday, April 9, 2014 at 1:32pm

physics
A uniform thin rod of length 0.55 m and mass 5.5 kg can rotate in a horizontal plane about a vertical axis through its center. The rod is a rest when a 3.0-g bullet traveling in the horizontal plane of the rod is fired into one end of the rod. As viewed from above, the ...
Wednesday, April 9, 2014 at 12:33pm

physics
a person was climbing on a building.he slips 1 metre for every 5 metre he climb up. if the building is 53 metre high and he takes 5 seconds to climb 1 metre,find the total time taken by him to get on the top of the building.
Wednesday, April 9, 2014 at 12:17pm

Physics
a gas at temperature 27 C and at a pressure of 20 atm is allowed to expand and its new volume becomes 10 times that the original and the new pressure is equal to the atmospheric pressure.what is the new temperature of the gas?
Wednesday, April 9, 2014 at 12:09pm

physics
A rescue worker pulls an injured skier lying on a toboggan (with a combined mass of 127 kg) across flat snow at a constant speed. A 2.53 m rope is attached to the toboggan at ground level, and the rescuer holds the rope taut at shoulder level. If the rescuer's shoulders ...
Wednesday, April 9, 2014 at 9:54am

physics
how many Btu of heat are required to melt 8.35 lb of ice at 32 degrees F
Wednesday, April 9, 2014 at 9:30am

physics
A motorcycle accelerates uniformly from rest and reaches a linear speed of 33.4 m/s in a time of 11.6 s. The radius of each tire is 0.265 m. What is the magnitude of the angular acceleration of each tire?
Wednesday, April 9, 2014 at 12:56am

physics
A baseball pitcher throws a baseball horizontally at a linear speed of 41.3 m/s. Before being caught, the baseball travels a horizontal distance of 15.4 m and rotates through an angle of 52.7 rad. The baseball has a radius of 3.74 cm and is rotating about an axis as it travels...
Wednesday, April 9, 2014 at 12:28am

physics
A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.50 x 104 rad/s to an angular speed of 3.76 x 104 rad/s. In the process, the bit turns through 3.13 x 104 rad. Assuming a constant angular acceleration, how long would it take the bit to ...
Wednesday, April 9, 2014 at 12:02am

Physics
A cart loaded with bricks has a total mass of 22.3 kg and is pulled at constant speed by a rope. The rope is inclined at 27.3◦degrees above the horizontal and the cart moves 9.3 m on a horizontal surface. The coefficient of kinetic friction between ground and cart is 0....
Tuesday, April 8, 2014 at 9:53pm

Physics
A 3 kg block collides with a massless spring of spring constant 90 N/m attached to a wall. The speed of the block was observed to be 1.5 m/s at the moment of collision. The acceleration of gravity is 9.8 m/s^2. How far does the spring compress if the surface on which the mass ...
Tuesday, April 8, 2014 at 9:51pm

Physics
A 3.9 g mass is released from rest at C which has a height of 0.9 m above the base of a loop-the-loop and a radius of 0.4 m. The acceleration of gravity is 9.8 m/s^2. Find the normal force pressing on the track at A, where A is at the same level as the center of the loop. ...
Tuesday, April 8, 2014 at 9:50pm

Physics
A block of mass 2.48 kg is kept at rest as it compresses a horizontal massless spring (k= 113 N/m) by 4.65 cm. As the block is released, it travels 0.462 m on a rough horizontal surface before stopping. The acceleration of gravity is 9.8 m/s^2. Calculate the coefficient of ...
Tuesday, April 8, 2014 at 9:46pm

physics
A force of 120.0 N is applied to 2.00 cm diameter piston in a closed container of water with a density of 1,000 kg/m2. What is the force on another piston with diameter of 25.0 cm connected to the container?
Tuesday, April 8, 2014 at 9:45pm

physics
A thin, uniform rod is hinged at its midpoint. To begin with, one-half of the rod is bent upward and is perpendicular to the other half. This bent object is rotating at an angular velocity of 7.1 rad/s about an axis that is perpendicular to the left end of the rod and parallel...
Tuesday, April 8, 2014 at 9:40pm

Physics (Help Please)
Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this? Many people imagine that the collision force exerted on the car is much greater than that experienced by...
Tuesday, April 8, 2014 at 8:53pm

Physics (Help Please)
An astronaut of mass 84.0 kg is taking a space walk to work on the International Space Station. Because of a malfunction with the booster rockets on his spacesuit, he finds himself drifting away from the station with a constant speed of 0.570 m/s. With the booster rockets no ...
Tuesday, April 8, 2014 at 8:52pm

Physics (Help please)
A force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete exerts on the ground as a function of time. Starting from rest, a 60.0 kg athlete jumps down onto the platform from a height of 0.600 m. While she is in contact...
Tuesday, April 8, 2014 at 8:49pm

PHYSICS HELP
A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis
Tuesday, April 8, 2014 at 3:47pm

physics
A 4.0-m-long steel wire has a cross-sectional area of 0.050cm2. Its proportional limit has a value of 0.0016 times its Young's modulus. Its breaking stress has a value of 0.0065 times its Young's modulus. The wire is fastened at its upper end and hangs vertically. A. ...
Tuesday, April 8, 2014 at 3:15pm

Physics
A force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete exerts on the ground as a function of time. Starting from rest, a 60.0 kg athlete jumps down onto the platform from a height of 0.600 m. While she is in contact...
Tuesday, April 8, 2014 at 1:58pm

Physics
An astronaut of mass 84.0 kg is taking a space walk to work on the International Space Station. Because of a malfunction with the booster rockets on his spacesuit, he finds himself drifting away from the station with a constant speed of 0.570 m/s. With the booster rockets no ...
Tuesday, April 8, 2014 at 1:57pm

physics
A golfer can generate a peak angular velocity of 3.89 rev/s. If the distance from the club head to it's axis of rotation is 0.96 meters, calculate the peak linear velocity with which he can hit the ball in meters per second.
Tuesday, April 8, 2014 at 1:56pm

Physics
Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this? Many people imagine that the collision force exerted on the car is much greater than that experienced by...
Tuesday, April 8, 2014 at 1:54pm

Physics multiple choice questions
1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy --> ...
Tuesday, April 8, 2014 at 1:22pm

Physics
2. Boxcar A, with mass of 1500 kg, is travelling at 25 m/s to the east. Boxcar B has a mass of 2000 kg, and is initially at rest. The box cars collide inelastically and move together after they get stuck. What is their combined velocity?
Tuesday, April 8, 2014 at 12:41pm

Physics
1. Car A, with mass of 1250 kg, is travelling at 30 m/s to the east. Car B is a truck with mass of 2000 kg, travelling to the west at 25 m/s. Assume these two vehicles experience an inelastic collision but do not stick together, and Car A goes off 10 m/s to the west. What will...
Tuesday, April 8, 2014 at 12:40pm

physics
A technician needs to determine the amount of energy required to increase the temp. of a vat containing 12 kg of water. The water enters the vat from the water mains at a temp. of 15 deg C. The technician knows that the final temp. required is 90 deg C. How much energy is ...
Tuesday, April 8, 2014 at 12:11pm

physics
How to calculate the maximum vertical component of the force in rope BC when the force in rope is 400N
Tuesday, April 8, 2014 at 5:24am

physics
Consider the rotational motion of two compact discs (CD). Disc A undergoes a rotation of 540 degrees in 1.50 secs, and disc B undergoes a rotation of π radians in 3.00 secs.
Monday, April 7, 2014 at 11:30pm

Physics
My willy bird is 6 inches and has a mass, M, of 2.1kg. During penetration, it reaches a force or 15.0 N with a coefficient of friction 0.75. Calculate its rotational velocity given no respect to time. How much work is done in a thirty second period?
Monday, April 7, 2014 at 9:46pm

Physics
What is the critical angle (in degrees) for a ray of light coming from a medium with an index of refraction of 1.4 to a medium with an index of refraction of 1.2? label the unit.
Monday, April 7, 2014 at 9:07pm

Physics
A fish swimming in a pond looks up at a dragonfly flying 45 cm above the surface of the water. How far does the dragonfly appear to the fish if the indices of refraction of water and air are 1.33 and 1, respectively? Enter your answer in cm.
Monday, April 7, 2014 at 9:06pm

Physics
The air pressure in a tire is 2.38 atm. What is this pressure in kilopascals?
Monday, April 7, 2014 at 8:35pm

physics
1. A light ray strikes a mirror at an angle of 42° from the surface of the mirror. What angle does the reflected ray make with the normal Ans. 42° 2. A ray of light hits a mirror at 27° from the normal. What is the angle between the reflected ray and the normal. ...
Monday, April 7, 2014 at 8:03pm

physics
A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 2.2cm from the solenoid's axis (so at a point inside the ...
Monday, April 7, 2014 at 7:29pm

Physics
Draw each of the following vectors on graph paper, then find the x- and y- components. Make sure to include units in your answers for the components. a) ⃑r = (65 m, 30degrees above the positive x-axis) b) ⃑v = (125 m/s, 40degrees below the negative x-axis) c) &#...
Monday, April 7, 2014 at 6:44pm

physics
100turns of insulated wire are wraped around a wooden cylindrical core of cross-sectional area 12cm2. The two ends of the wire are connected to a resistor. The total circuit resistance is 13Ω. If an externally applied uniform magnetic field along the core changes from 1....
Monday, April 7, 2014 at 6:27pm

physics
If for the pipe carrying water in a building, h = 220 meters, v_1 = 3.8 m/s, and the cross-sectional area at 1 is twice that at 2. What must P_1 be in order that P_2 = 135000 Pa? P_1 =
Monday, April 7, 2014 at 5:03pm

physics
A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis (so at a point outside the ...
Monday, April 7, 2014 at 5:02pm

physics
How many excess electrons are there in a typical lightning bolt that has about 16 C of charge? Answer 1 x 1020 1 x 1019 10 1 x 1016
Monday, April 7, 2014 at 5:01pm

physics
An infinitely long thin metal strip of width w=12cm carries a current of I=10A that is uniformly distributed across its cross section. What is the magnetic field at point P a distance a=3cm above the center of the strip as shown? This one requires some integration! I suggest ...
Monday, April 7, 2014 at 5:01pm

physics HELP
Consider a coaxial cable with 2Amps in the center conductor coming out of the page, and 1Amp in the outer conductor going into the page. The center conductor has a radius of 1mm, the outer conductor's inner radius is 2mm, and the outer conductor's outter radius is 3mm...
Monday, April 7, 2014 at 5:01pm

physics
The figure shows a nozzle on a hose carrying water. If the pressure at Point 1 is 290 x 10^3 Pa, the velocity 0.64 m/s, and the diameter 20 cm. Given that the diameter at point 2 is 1.4 cm, what is the velocity at point 2? v_2 = What is the pressure at point 2? P_2 =
Monday, April 7, 2014 at 4:57pm

physics
Water is in the big beaker in the figure on the left. Scale 1 reads 87 Newtons, scale 2 reads 544 newtons, and scale 3 reads 0 newtons. The hanging block has a density of 15 x 10^3 kg/m^3. What does scale 1 read after the block is fully lowered into the beaker of water? Scale...
Monday, April 7, 2014 at 4:55pm

physics
Earthquakes are essentially sound waves—called seismic waves—traveling through the earth. Because the earth is solid, it can support both longitudinal and transverse seismic waves. The speed of longitudinal waves, called P waves, is 7800m/s . Transverse waves, called...
Monday, April 7, 2014 at 4:36pm

physics HELP
A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis (so at a point outside the ...
Monday, April 7, 2014 at 3:58pm

Physics multiple choice questions
1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy --> ...
Monday, April 7, 2014 at 12:39pm

physics
a 4kg bird is flying with a velocity of 4m/s2. what is the kinetic energy?
Monday, April 7, 2014 at 11:54am

physics
A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis (so at a point outside the ...
Monday, April 7, 2014 at 10:43am

Physics
You are given a four-wheeled cart of mass 11 kg, where the distance between a wheel and its nearest neighbors is 2.1 m. Suppose we load this cart with a crate of mass 109 kg, where the crate's center of mass is located in the back-middle of the cart, 0.525 m from its ...
Monday, April 7, 2014 at 9:52am

physics
100turns of insulated wire are wraped around a wooden cylindrical core of cross-sectional area 12cm2. The two ends of the wire are connected to a resistor. The total circuit resistance is 13Ω. If an externally applied uniform magnetic field along the core changes from 1....
Monday, April 7, 2014 at 9:27am

physics
Consider a coaxial cable with 2Amps in the center conductor coming out of the page, and 1Amp in the outer conductor going into the page. The center conductor has a radius of 1mm, the outer conductor's inner radius is 2mm, and the outer conductor's outter radius is 3mm...
Monday, April 7, 2014 at 7:30am

physics plz help
I need help in calculating work. following quantites are given. * G: 6.67E-11 *Mass of earth:5.98E24 *mass of satelightt:80kg *x(initial) center of the earth-7E6 m *x(final) center of the earth 12E6 m How do I make integral equation I need use 20 interval or calculate in excel...
Monday, April 7, 2014 at 5:36am

physics
An infinitely long thin metal strip of width w=12cm carries a current of I=10A that is uniformly distributed across its cross section. What is the magnetic field at point P a distance a=3cm above the center of the strip as shown? This one requires some integration! I suggest ...
Monday, April 7, 2014 at 5:36am

physics/calculus
I need help in calculating work. following quantites are given. * G: 6.67E-11 *Mass of earth:5.98E24 *mass of satelightt:80kg *x(initial) center of the earth-7E6 m *x(final) center of the earth 12E6 m How do I make integral equation I need use 20 interval.
Monday, April 7, 2014 at 1:04am

Physics -- check answers please
1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy --> ...
Monday, April 7, 2014 at 12:15am

physics
Assuming bicycle tires are perfectly flexible and support the weight of bicycle and rider by pressure alone, calculate the total area of the tires in contact with the ground. The bicycle plus rider has a mass of 80.0 kg, and the gauge pressure in the tires is 3.50×105 Pa
Sunday, April 6, 2014 at 11:50pm

Discrete Math
There are 150 students taking Discrete Mathematics II, Calculus II, and Physics I courses. Of these 51 are taking Discrete Mathematics II, 111 are taking Calculus II, and 63 are taking Physics I. There are 41 taking Discrete Mathematics II and Calculus II, 32 students taking ...
Sunday, April 6, 2014 at 11:29pm

physics
Water towers store water above the level of consumers for times of heavy use, eliminating the need for high-speed pumps. How high above a user must the water level be to create a gauge pressure of 3.00×105 N/m2 ?
Sunday, April 6, 2014 at 10:47pm

physics
A cosmic-ray proton in interstellar space has an energy of 19.5 MeV and executes a circular orbit having a radius equal to that of Mars' orbit around the Sun (2.28 1011 m). What is the magnetic field in that region of space?
Sunday, April 6, 2014 at 10:21pm

physics
You are given a four-wheeled cart of mass 11 kg, where the distance between a wheel and its nearest neighbors is 2.1 m. Suppose we load this cart with a crate of mass 109 kg, where the crate's center of mass is located in the back-middle of the cart, 0.525 m from its ...
Sunday, April 6, 2014 at 9:47pm

physics
Consider a coaxial cable with 2Amps in the center conductor coming out of the page, and 1Amp in the outer conductor going into the page. The center conductor has a radius of 1mm, the outer conductor's inner radius is 2mm, and the outer conductor's outter radius is 3mm...
Sunday, April 6, 2014 at 9:32pm

physics
A train is traveling along a straight, horizontal track at a constant speed of 20 mph (i.e.,a non-relativistic speed). An observer on the train places paint cans at the front and back of one of the cars. She then detonates the cans. Due to a malfunction, the can at the front ...
Sunday, April 6, 2014 at 8:45pm

Physics
Consider two masses that hang from an overhead beam. The first mass of 86.4 kg is attached to the beam using an ideal rope. The second mass of 20.8 kg is attached to the first mass with an ideal rope and hangs directly under the first mass. (a) Find the tension in the lower ...
Sunday, April 6, 2014 at 8:44pm

physics
A special train is traveling down a long, straight track with a constant acceleration of 9m/s^2 in the forward direction. The train is located on Mars where the acceleration due to gravity is 9 m/s^2. If a passenger drops a ball and measures the acceleration of the ball, the ...
Sunday, April 6, 2014 at 8:43pm

Physics
You are given a four-wheeled cart of mass 11 kg, where the distance between a wheel and its nearest neighbors is 2.1 m. Suppose we load this cart with a crate of mass 109 kg, where the crate's center of mass is located in the back-middle of the cart, 0.525 m from its ...
Sunday, April 6, 2014 at 8:43pm

physics
A series RLC circuit is made with a C=100pF capacitor, an L=100μH inductor, and an R=30Ω resistor. The circuit is driven at 5×106rad/s with a 1V amplitude. What is the current oscillation amplitude in amps
Sunday, April 6, 2014 at 5:04pm

Physics
In the device a 50g mass is hung from a pulley and released. A disk is placed on the platform. The platform has a radius of 5cm. The disk and platform go from rest to an angular velocity of 8.5rad/s in 2.5 seconds. What is the moment of inertia of the disk? What is its mass? ...
Sunday, April 6, 2014 at 4:56pm

Physics
Boxcar A, with a mass of 1500 kg, is travelling at 25 m/s to the east. Boxcar B has a mass of 2000 kg, and is initially at rest. The boxcars collide inelastically and move together after they get stuck. What is their combined velocity?
Sunday, April 6, 2014 at 3:41pm

Physics
A bullet is fired horizontally with a speed of 100 m/s aiming at a target 20m away. It misses the target by??
Sunday, April 6, 2014 at 2:58pm

cape1 physics
a hammer is often used to force a nail into wood.the faster the hammer moves,the deeper the nail moves into the wood.
Sunday, April 6, 2014 at 12:56pm

Math/Physics
Problem Question: Rashad started The 780km drive from Sault st. Marie to Ottawa at 09:00. His average speed was 100km/h. Two hours later Tyson left Ottawa for Sault St. Marie. He drove at 80km/h on the same highway. How far from Ottawa, and what time of day did they meet?
Sunday, April 6, 2014 at 12:26pm

physics
A lightning bolt may carry a current of 1.00 ✕ 104 A for a short time interval. What is the resulting magnetic field 134 m from the bolt? Assume that the bolt extends far above and below the point of observation.
Sunday, April 6, 2014 at 12:14pm

physics
A series RLC circuit is made with a C=100pF capacitor, an L=100μH inductor, and an R=30Ω resistor. The circuit is driven at 5×106rad/s with a 1V amplitude. What is the current oscillation amplitude in amps
Sunday, April 6, 2014 at 10:40am

physics
Consider a coaxial cable with 2Amps in the center conductor coming out of the page, and 1Amp in the outer conductor going into the page. The center conductor has a radius of 1mm, the outer conductor's inner radius is 2mm, and the outer conductor's outter radius is 3mm...
Sunday, April 6, 2014 at 8:59am

physics
A brass ring of diameter 10.00 cm at 22.2°C is heated and slipped over an aluminum rod of diameter 10.01 cm at 22.2°C. Assume the average coefficients of linear expansion are constant. (b) What if the aluminum rod were 9.16 cm in diameter?
Saturday, April 5, 2014 at 8:53pm

Physics
A 215-kg load is hung on a wire of length of 3.50 m, cross-sectional area 2.000x10^-5 m2, and Young's modulus 8.00x 10^10 N/m2. What is its increase in length?
Saturday, April 5, 2014 at 5:36pm

Pages: <<Prev | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | Next>>

Post a New Question | Current Questions

Homework Help: Science

Search
Members