Thursday
April 24, 2014

Homework Help: Science: Physics

Recent Homework Questions About Physics

Post a New Question | Current Questions

Physics
A star rotates twice in 24 hours. It then goes supernova, meaning it explodes and its radius gets a lot larger, about 4 times larger. Additionally, the explosion sends most of the mass to the edge of the sphere, making it resemble a spherical shell instead of a solid sphere. ...
Thursday, April 3, 2014 at 9:14am

Physics Help
A graph of wavelength vs. 1/frequency should be a straight line. What are it's slope and y-intercept? I'm not given any graphs or numbers, just this question. And I know that Velocity = frequency x wavelength And that slope is found by rise/run and m= y2-y1/x2-x1 ...
Thursday, April 3, 2014 at 3:23am

physics
Does changing the angle of an incline that you are rolling a ball down change any of these paramaters? Final velocity of the ball, work, initial potential energy, and final kinetic energy?
Thursday, April 3, 2014 at 2:43am

PHYSICS!!
Light travels at about 0.75c in water. A)What's the wavelength in water of light whose wavelength in vacuum is 418nm
Thursday, April 3, 2014 at 12:47am

Physics
A uniform beam of length L = 8.00 m and weight 3.80 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam.
Wednesday, April 2, 2014 at 10:26pm

Physics
Consider the following distribution of objects: a 4.00-kg object with its center of gravity at (0, 0) m, a 1.20-kg object at (0, 3.00) m, and a 5.40-kg object at (2.00, 0) m. Where should a fourth object of mass 7.00 kg be placed so that the center of gravity of the four-...
Wednesday, April 2, 2014 at 10:26pm

physics
I once was given a metal whiskey flask for being in my cousin’s wedding. When it got dented, I put in 1 gram of H2O (initially 21°C, just like the air filling the rest of the flask) and heated it up to boil the water. It popped the dent out. Assume the flask had a ...
Wednesday, April 2, 2014 at 9:35pm

physics
What linear speed must a 0.0508-kg hula hoop have if its total kinetic energy is to be 0.164 J? Assume the hoop rolls on the ground without slipping.
Wednesday, April 2, 2014 at 6:21pm

physics
A billiard ball of mass m = 0.250 kg hits the cushion of a billiard table at an angle of θ1 = 70.0° at a speed of v1 = 2.50 m/s. It bounces off at an angle of θ2 = 63.0° and a speed of v2 = 2.10 m/s.
Wednesday, April 2, 2014 at 5:50pm

physics
A wheel, starting from rest, has a constant angular acceleration of 1.8 rad/s^2. In a 3.1-s interval, it turns through an angle of 142 rad. How long has the wheel been in motion at the start of this 3.1-s interval?
Wednesday, April 2, 2014 at 5:39pm

physics
A submarine is stranded on the bottom of the ocean with its hatch 25.0 m below the surface. Calculate the force needed to open the hatch from the inside, given it is circular and 0.450 m in diameter. Air pressure inside the submarine is 1.00 atm.
Wednesday, April 2, 2014 at 5:26pm

Physics
Consider the following distribution of objects: a 4.00-kg object with its center of gravity at (0, 0) m, a 1.20-kg object at (0, 3.00) m, and a 5.40-kg object at (2.00, 0) m. Where should a fourth object of mass 7.00 kg be placed so that the center of gravity of the four-...
Wednesday, April 2, 2014 at 5:10pm

Physics
A uniform beam of length L = 8.00 m and weight 3.80 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam.
Wednesday, April 2, 2014 at 5:10pm

Physics
It shows a ball going along a frictionless track. How do you find the kinetic energy at position B on the track if position B is 15 above the ground and position A is 20 meters above the ground? The weight of the ball is .020 kg
Wednesday, April 2, 2014 at 4:52pm

physics
pressure cookers have been around for more than 30 years, although their use has stongly declined in recent years.how much force must the latches holding the lid onto pressure cooker be able to withstand if the circular lid is 25 cm in diameter and the gauge pressure inside is...
Wednesday, April 2, 2014 at 4:44pm

physics college level
A 2.0-kg block is projected up a frictionless inclined plane with a speed of 10 m/s. The angle of inclination is 30o . The block goes a distance of _____ up the plane before stopping. Assume g = 10 m/s2
Wednesday, April 2, 2014 at 4:27pm

Physics
In a relay race the second runner does not start from rest. it covers 100 m in 10 sec, finishing with maximum velocity of 12 m/sec, assuming the constant acceleration, determine his initial velocity. ??
Wednesday, April 2, 2014 at 4:09pm

Physics
A satellite is given a boost of 540 MJ of energy to move it from its initial orbit at an altitude of 150 km to a higher altitude orbit. If the satellite has a mass of 1.16 ✕ 10^3 kg, what is the new altitude it reaches? Take the mass of the Earth to be 5.97 x 10^24 kg ...
Wednesday, April 2, 2014 at 3:59pm

Physics
In a relay race the second runner does not start from rest. it covers 100 m in 10 sec, finishing with maximum velocity of 12 m/sec, assuming the constant acceleration, determine his initial velocity. ??
Wednesday, April 2, 2014 at 3:10pm

Physics
The flywheel of a steam engine runs with a constant angular speed of 112 rev/ min . When steam is shut off, the friction of the bearings and the air brings the wheel to rest in 2.2 h. What is the magnitude of the constant angular acceleration of the wheel in rev/min^2? Do not ...
Wednesday, April 2, 2014 at 1:42pm

Physics
A cyclist starts from rest and pedals such that the wheels of his bike have a constant angular acceleration. After 20.0 s, the wheels have made 219 rev. What is the angular acceleration of the wheels? What is the angular velocity of the wheels after 20.0 s? If the radius of ...
Wednesday, April 2, 2014 at 1:35pm

Physics -- check answers please
1. A boy pushes a car to slow it down while the car is rolling horizontally down the road. If the boy pushes backwards on the car with 10N of force as the car rolls forward 3.0m, the amount of work done by the boy is: a)-30 b)0 c)3.3 J d)30 N•m e)300J my answer: a 2. what...
Wednesday, April 2, 2014 at 12:22pm

Physics
I already figured out the answers to some but I need help with two more. 1) A disk with an initial angular velocity ω0 = 4.5 rad/s experiences a constant angular acceleration of α = 7.5 rad/s2 for time t = 15 s. Please answer the following questions. ω0 = 4.5 ...
Wednesday, April 2, 2014 at 11:06am

Equation help
A physics student stands at the top of a hill that has an elevation of 56 meters. he throws a rock and it goes up into the air and then falls back past him and lands on the ground below. The path of the rock can be modeled by the equation y=0.04x^2+1.3x+56 where x is the ...
Wednesday, April 2, 2014 at 10:31am

physics
The mass of an iron cube having an edge length 1.8 cm is 70 g. Find itd density.
Wednesday, April 2, 2014 at 8:22am

Physics
A 2115 kg car moving east at 10.61 m/s col- lides with a 3169 kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 32.4◦ north of east and at a speed of 5.03 m/s. What was the speed of the 3169 kg car before the collision?
Tuesday, April 1, 2014 at 11:46pm

physics
Is there a way to calculate the moment of inertia of a hanging mass (3.1 kg) without length & width dimensions?
Tuesday, April 1, 2014 at 11:26pm

Physics
A uniform beam of length L = 8.00 m and weight 3.80 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam.
Tuesday, April 1, 2014 at 10:39pm

Physics
Consider the following distribution of objects: a 4.00-kg object with its center of gravity at (0, 0) m, a 1.20-kg object at (0, 3.00) m, and a 5.40-kg object at (2.00, 0) m. Where should a fourth object of mass 7.00 kg be placed so that the center of gravity of the four-...
Tuesday, April 1, 2014 at 10:39pm

Physics-Gravitational Potential Energy
A satellite is given a boost of 540 MJ of energy to move it from its initial orbit at an altitude of 150 km to a higher altitude orbit. If the satellite has a mass of 1.16 ✕ 103 kg, what is the new altitude it reaches? Take the mass of the Earth to be 5.97 x 10^24 kg ...
Tuesday, April 1, 2014 at 10:06pm

Physics
When a small object is launched from the surface of a fictitious planet with a speed of 52.0 m/s, its final speed when it is very far away from the planet is 32.0 m/s. Use this information to determine the escape speed of the planet.
Tuesday, April 1, 2014 at 10:04pm

Physics
For the system of two crates and a pulley in the figure below, what fraction of the total kinetic energy resides in the pulley? (Assume m1 = 14 kg, m2 = 10 kg and mpulley = 5 kg.) (( o )) | | | | [m1] | [m2]
Tuesday, April 1, 2014 at 9:58pm

Physics
A 920kg car is 65m from a concrete barrier, travelling at 125km/h, when the driver notices and slams on the breaks. The frictional force acting on the car is 8500 N. Is ther driver able to stop the car before hitting the barrier.
Tuesday, April 1, 2014 at 9:39pm

physics
Assume all angles to be exact. The critical angle between two materials is 45∘. If the angle of incidence is 35∘, what is the angle of refraction? (Consider that light can travel to the interface from either material.)
Tuesday, April 1, 2014 at 9:35pm

physics
An outdoor circular fish pond has a diameter of 4.00 m and a uniform full depth of 1.60 m . A fish halfway down in the pond and 0.70 m from the near side can just see the full height of a 1.80 m tall person. How far away from the edge of the pond is the person?
Tuesday, April 1, 2014 at 9:34pm

Physics
9. Question : Cheryl runs a race on a circular 400.0 m track. She starts running east at the starting line and stops 20.0 m west of the starting line. Her time is 8.0 × 101 s. What is her average speed? 4.8 m/s 2.1 × 10-1 m/s -2.5 × 10-1 m/s 5.0 × 101 ...
Tuesday, April 1, 2014 at 9:25pm

physics
Madison pushes with a 160-N horizontal force on a 20-kg crate of coffee resting on a warehouse floor.the floor of friction force of 24N.show that the box accelerates is 4m/s²
Tuesday, April 1, 2014 at 9:22pm

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 4s
Tuesday, April 1, 2014 at 8:42pm

physics
What is the smallest size plane mirror a 184-cm {\rm cm}-tall person should buy to see himself if he mounts the mirror on a vertical wall?
Tuesday, April 1, 2014 at 5:05pm

Physics
After a completely inelastic collision, two objects of the same mass and same initial speed are found to move away together at 1/5 their initial speed. Find the angle between the initial velocities of the objects.
Tuesday, April 1, 2014 at 4:55pm

Physics
A stone is dropped at t = 0. A second stone, with 4 times the mass of the first, is dropped from the same point at t = 110 ms. (a) How far below the release point is the center of mass of the two stones at t = 410 ms? (Neither stone has yet reached the ground.) (b) How fast is...
Tuesday, April 1, 2014 at 4:44pm

physics
A certain hydraulic system is designed to exert a force 100 times as large as the one put into it. (a) What must be the ratio of the area of the slave cylinder to the area of the master cylinder? (b) What must be the ratio of their diameters? (c) By what factor is the distance...
Tuesday, April 1, 2014 at 4:26pm

physics
A concrete wall of thickness one metre of a dam can withstand a side pressure of 10 5 2 N m- . Find the thickness of sidewall at the bottom of the water dam at a depth of 100 m. [ g = - 10 m 2 s and density of water = 10 3 kg/m3 ]
Tuesday, April 1, 2014 at 1:35pm

physics
A train travel 20km at a uniform speed 60km/1hr and the next 20km at a uniform speed of 80km/1hr calculate its average speed
Tuesday, April 1, 2014 at 8:53am

Physics
What pressure is exerted by the tip a nail struck with a Force of 20,000N? Assume the tip is a 1.5mm-radius circle.
Tuesday, April 1, 2014 at 2:58am

Physics Help
A bungee jumper undergoes simple harmonic motion with amplitude 3.5 m and frequency 0.135 Hz. Assume the bungee jumper follows the simple harmonic motion equation x=Acos(wt). A. Determine the bungee jumper's velocity at 0.25 s B. Determine the bungee jumper's velocity ...
Tuesday, April 1, 2014 at 1:33am

Physics
A puck with mass m = 0.17kg slides along a frictionless horizontal surface at v = 5.3m/s . It hits and sticks to the free end of a spring with k = 17N/m Find the amplitude and period of the subsequent simple harmonic motion?
Tuesday, April 1, 2014 at 12:53am

Need help on Physics!!
Three uniform spheres are fixed at the positions shown in the diagram. Assume they are completely isolated and there are no other masses nearby. (a) What is the magnitude of the force on a 0.20 kg particle placed at the origin (Point P)? What is the direction of this force? (b...
Monday, March 31, 2014 at 11:24pm

Physics please help ASAP!
If you know the mass of a star and a planet’s radius and speed at perihelion (closest approach to the star), then using conservation of energy and angular momentum you can solve for the radius and speed of that planet at aphelion (farthest point from the star). Encke’...
Monday, March 31, 2014 at 11:20pm

physics
The figure below shows a claw hammer being used to pull a nail out of a horizontal board where θ = 32.2°. The mass of the hammer is 1.00 kg. A force of 125 N is exerted horizontally as shown, and the nail does not yet move relative to the board. Assume the force the ...
Monday, March 31, 2014 at 11:08pm

Physics
A toy dart gun has a spring with a spring constant of 315 N/m. An 12 gram dart is loaded in the gun and the spring is compressed a distance of 7.8 cm and then shot into the air. When the dart is 5.8 meters high in the air, what is its speed? If the maximum height the dart can ...
Monday, March 31, 2014 at 11:00pm

Physics
Water flows into a house at a velocity of 15 m/s through a pipe that has a radius of 0.40 m. The water then flows through a smaller pipe at a velocity of 45 m/s. What is the radius of the smaller pipe?
Monday, March 31, 2014 at 10:30pm

Physics
How much pressure is exerted on a submarine at a depth of 8.50 km in the Pacific Ocean? (density of sea water = 1.025 x 10^3 kg/m3, P0 = 1.01 x 10^5 Pa)
Monday, March 31, 2014 at 10:24pm

Physics
The two pistons in a hydraulic lift have radii of 2.67 cm and 20.00 cm respectively. What force must be applied to the 2.67 cm piston so that a 2.0 x 10^3 kg mass resting on the 20.0 cm piston is lifted?
Monday, March 31, 2014 at 10:22pm

Physics
The two pistons in a hydraulic lift have radii of 2.67 cm and 20.00 cm respectively. What force must be applied to the 2.67 cm piston so that a 2.0 x 103 kg mass resting on the 20.0 cm piston is lifted?
Monday, March 31, 2014 at 10:21pm

Physics
What element results if two protons and two neutrons are ejected from a radium nucleus?
Monday, March 31, 2014 at 10:10pm

physics
A string with a length of 1.3 m is fixed at both ends. What is the longest possible wavelength for a standing wave on this string?
Monday, March 31, 2014 at 10:05pm

physics
A person is standing in an elevator, which is accelerating upwards. What can you say about the relationship between the force due to gravity mg and the normal force N (both on the person)? a) N > mg b) N = mg c) N < mg (but not zero) d) N = 0 I picked d because the m in ...
Monday, March 31, 2014 at 10:04pm

college physics 2
A healthy astronaut's heart rate is 60 beats/min. Flight doctors on Earth can monitor an astronaut's vital signs remotely while in flight. How fast would an astronaut be flying away from Earth if the doctor measured her having a heart rate of 28 beats/min?
Monday, March 31, 2014 at 9:48pm

physics
Astronauts in space cannot weigh themselves by standing on a bathroom scale. Instead, they determine their mass by oscillating on a large spring. Supppose an astronaut attaches one end of a large spring to her belt and the other end to a hook on the wall of the space capsule. ...
Monday, March 31, 2014 at 8:26pm

physics
A compact car has a mass of 1150 kg. Assume that the car has one spring on each wheel, that the springs are identical, and that the mass is equally distributed over the four springs. (a) What is the spring constant of each spring if the empty car bounces up and down 2.2 times ...
Monday, March 31, 2014 at 8:17pm

physics
The acceleration due to gravity on the moon is 1.62 m/s2. What is the length of a pendulum whose period on the moon matches the period of a 4.00-m-long pendulum on earth?
Monday, March 31, 2014 at 7:47pm

physics
A ladder can fall for two reasons. If it is set too steep and the climber gets their mass to the left of the ladder's base, the ladder likely will fall over backwards. If the ladder is set at too shallow of an angle the required force of friction between the ladder and ...
Monday, March 31, 2014 at 7:09pm

Physics
A 3000N force stretches a wire by 2.0mm. A second wire of the same material is twice as long and has twice the diameter. How much force is needed to stretch it by 1.0 mm?
Monday, March 31, 2014 at 4:13pm

physics
For a hydrogen atom, determine the ratio of the ionization energy for the n = 3 excited state to the ionization energy for the ground state.
Monday, March 31, 2014 at 3:10pm

physics
Light shines through a single slit whose width is 5.7 × 10-4 m. A diffraction pattern is formed on a flat screen located 4.0 m away. The distance between the middle of the central bright fringe and the first dark fringe is 3.9 mm. What is the wavelength of the light?
Monday, March 31, 2014 at 2:44pm

physics
A 148 kg student sits on a chair which is solely supported by a solid 0.97 meter-long steel rod 0.68 cm in diameter. What is the change in length of the rod produced by the student's weight? Delta l =
Monday, March 31, 2014 at 2:20pm

Physics
I need to check my answers for the following: An Aston Martin V8 Vantage sports car has a maximum “lateral acceleration” of 0.96 “g’s”, after which the car begins to skid out of its turn. 2.1 Calculate the coefficient of static friction between the car...
Monday, March 31, 2014 at 12:08pm

Physics
A steel ball hangs in a 147cm thread which is dragged right and then let go. Velocityh of the ball is 2,44m/s when it goes through the middle position. I dont have any mass given up. How many degrees to the side had the ball been dragged?
Monday, March 31, 2014 at 11:12am

physics
An 8 g bullet is shot into a 4.0 kg block, at rest on a frictionless horizontal surface. The bullet remains lodged in the block. The block moves into a spring and compresses it by 3.7 cm. The force constant of the spring is 2500 N/m. In the figure, the initial velocity of the ...
Monday, March 31, 2014 at 9:36am

Physics
A cubic meter of some material has a mass of 6400 kg. The block of material is lowered into a lake by a strong cable until the block is completely submerged. Draw a free-body diagram for the block. (Do this on paper. Your instructor may ask you to turn in your work.) Find the ...
Monday, March 31, 2014 at 6:34am

Physics
A 0.559 kg particle has a speed of 2.7 m/s at point A and kinetic energy of 8.4 J at point B. What is its kinetic energy at A?
Monday, March 31, 2014 at 5:56am

physics
car with a mass of 1280 kg is moving around a curve with a radius of 50 m at a constant speed of 10 m/s (about 22 MPH). (a) What is the centripetal acceleration of the car? (b) What is the magnitude of the force required to produce this centripetal acceleration
Monday, March 31, 2014 at 2:41am

Physics
I need immediate help on these questions:. 2.a small plastic ball with a mass of 0.005kg is suspended from a thread and hangs in equilibrium as shown in the drawing below when a small rod with a 2 uC charge is brought to within 3mm of the ball a)find the tension force in the ...
Sunday, March 30, 2014 at 11:55pm

physics
a cannon with mass of 2,000 kg fires a 10 kg shell with a velocity of 200 m/s at an angle of 60 degrees above the horizontal. What is the recoil velocity of the cannon across the level ground?
Sunday, March 30, 2014 at 11:13pm

physics
a 1500 kg car moving at 20 m/s strikes a truck waiting at a traffic light, hooking the bumpers. The two continue to move together at 10 m/s. What was the mass of the truck?
Sunday, March 30, 2014 at 11:11pm

physics
A water tank is filled to a depth of 10 m and the tank is 20 m above ground. The water pressure at ground level in a hose 2 cm in diameter is closest to: A) 3.9 × 105 N/m2 B) 2.0 × 104 N/m2 C) 9.2 N/m2 D) The cross-sectional area of the tank is needed.
Sunday, March 30, 2014 at 11:09pm

Physics
It's called Mike's Online Biology: MOB University. Click physics Tutoring tab -> chapter 9 -> scroll down to question #13 with video below it. I used it as a guide.
Sunday, March 30, 2014 at 10:55pm

physics
two objects attract each other gravitationally with a force of 2.5^-10N.when they are 0.25m apart. Their total mass is 4.00kg. Find the individual mass?
Sunday, March 30, 2014 at 10:52pm

physics
a 1000 kg sports car accelerates from 0-30 m/s in 5.0 s. What is tge average power delivered by the automobile engine?
Sunday, March 30, 2014 at 10:34pm

physics
Imagine having an 80-turn coil with radius of 5.0 cm and resistance of 30 Ù. At what rate must a perpendicular magnetic field change to produce a current of 4.0 A?
Sunday, March 30, 2014 at 9:49pm

physics
A uniform magnetic field makes an angle of 30 degrees with the axis of a circular loop of 300 turns and radius of 4 cm. The magnetic field changes at a rate of 85 T/s. Determine the magnitude of the induced emf in the loop.
Sunday, March 30, 2014 at 9:48pm

Physics 112
A battery is connected in series with a R = 0.26 Ω resistor and an inductor, as shown in the figure below. The switch is closed at t = 0. The time constant of the circuit is τ = 0.10 s, and the maximum current in the circuit is I = 8.4 A. Find the following. (a) the ...
Sunday, March 30, 2014 at 7:51pm

Physics
Water flowing through a garden hose of diameter 2.77 cm fills a 25.0-L bucket in 1.40 min. (a) What is the speed of the water leaving the end of the hose? Answer in m/s (b) A nozzle is now attached to the end of the hose. If the nozzle diameter is one-third the diameter of the...
Sunday, March 30, 2014 at 7:29pm

Physics
Water flowing through a garden hose of diameter 2.77 cm fills a 25.0-L bucket in 1.40 min. (a) What is the speed of the water leaving the end of the hose? Answer in m/s (b) A nozzle is now attached to the end of the hose. If the nozzle diameter is one-third the diameter of the...
Sunday, March 30, 2014 at 7:13pm

Physics
Two identical pucks are set on a collision course on an air table. After the collision, puck A has a final velocity of 5.00cm/s at an angle of 28 degrees from the vertical and puck B has a final velocity of 4.00cm/s at an angle of 32 degrees from the vertical. Determine the ...
Sunday, March 30, 2014 at 6:06pm

Physics
Two pucks with similar masses collide with each other over a nearly frictionless surface. At the moment of collision, a sharp knocking sound is produced. Is this collision elastic or inelastic? Explain.
Sunday, March 30, 2014 at 6:05pm

Physics
Consider an isolated system consisting of two masses, each of which has a velocity vector in two dimensions. When these two masses collide the total momentum of the system is conserved. (a) Show that if the total momentum of the system is conserved then the component momenta ...
Sunday, March 30, 2014 at 6:04pm

physics
a student drops an object out the window of the top floor of a high-rise dormitory a) neglecting air resistance, how fast is the object traveling when it strikes the ground at the end of 3.0 s? express the speed in mi/h for a familiar comparison, b) how far, in meters, does ...
Sunday, March 30, 2014 at 5:09pm

physics
a ball is dropped from the top on an 80-m high building. what speed does the ball have in falling 3.5 s?
Sunday, March 30, 2014 at 4:18pm

Physics
Water flowing through a garden hose of diameter 2.77 cm fills a 25.0-L bucket in 1.40 min. (a) What is the speed of the water leaving the end of the hose? Answer in m/s (b) A nozzle is now attached to the end of the hose. If the nozzle diameter is one-third the diameter of the...
Sunday, March 30, 2014 at 3:41pm

physics
a car travels on a straight road. a) starting from rest, the car is going 44 ft/s (30 mi/h) at the end of 5.0 s. What is the car's average acceleration in ft/s^2 b) in 4.0 more seconds, the car is going 88 ft/s (60 mi/h). what is the car's average acceleration for this...
Sunday, March 30, 2014 at 3:35pm

physics
modern oil tankers weigh more than a half-million tons and have lengths of up to one-fourth mile. Such massive ships require a distance of 5.0 km (about 3.0 mi) and a time of 20 min to come to a stop from a top speed of 30 km/h. What is the magnitude of a such a ship's ...
Sunday, March 30, 2014 at 3:30pm

physics
a race car traveling northward on a straight, level track at a constant speed travels 0.750 km in 20.0 s. the return trip over the same track is made in 25.0 s. a) what is the average velocity if the car in m/s for the first leg of the run? b) what is the average velocity for ...
Sunday, March 30, 2014 at 3:13pm

Physics
A 1230 -kg car is pushing an out-of-gear 2180 -kg truck that has a dead battery. When the driver steps on the accelerator, the drive wheels of the car push horizontally against the ground with a force of 4420N . The rolling friction of the car can be neglected, but the heavier...
Sunday, March 30, 2014 at 2:21pm

physics
a glass lens has a convex surface with a radius 25.0 cm and a concave surface with radius 50.0 cm with the glass refraction = 1.51 calculate the focal length
Sunday, March 30, 2014 at 11:41am

Physics
PLEASE HELP! DUE TOMORROW! In a warehouse crates are placed at the top of a ramp and an employee has to slowly (at a constant velocity) lower them down the ramp. Initially the crates are stationary so the employee needs to start them moving by pulling on them and then push ...
Sunday, March 30, 2014 at 11:28am

physics
Given the atmospheric pressure is 10 5pa what is a gauge pressure of 0.55 mpa equal to?
Sunday, March 30, 2014 at 10:45am

physics
The mass of a vehicle is 4.25 tones concentrate 1.25 meters behind the front wheels what is the force required to jack up the rear wheels?
Sunday, March 30, 2014 at 10:43am

physics
Two positive charges of 12 µC and 8 µC respectively are 10 cm apart. Find the work done in bringing them 4 cm closer, so that, they are 6 cm apart..
Sunday, March 30, 2014 at 12:45am

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Post a New Question | Current Questions

Homework Help: Science

Search
Members