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October 1, 2014

Homework Help: Science: Physics

Recent Homework Questions About Physics

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Physics
The rocket sled shown in Figure 4.5 accelerates at a rate of 29.0 m/s2. Its passenger has a mass of 66.0 kg. Calculate the direction and magnitude of the total force the seat exerts against his body.
Saturday, June 14, 2014 at 10:46pm

Physics
Two teams of nine members each engage in a tug of war. The first team's members have average masses of 67 kg and exert average forces of 1350 N horizontally. The second team's members have average masses of 72 kg and exert average forces of 1361 N horizontally. (a) ...
Saturday, June 14, 2014 at 10:24pm

Physics
A 45-t electric train accelerates uniformly from a station with the train’s motion depicted in the graph in Figure 2.(Recall that 1 t = 1.0 × 103 kg.)Determine the net force acting on the train during the uniform acceleration portion of the motion.
Saturday, June 14, 2014 at 7:58pm

physics
The cg of the 50.0 N pole held by the pole vaulter is 2.00 m from the left hand, and the hands are 0.700 m apart. Calculate the force exerted by each hand.
Saturday, June 14, 2014 at 5:41pm

physics
You have an spring gun. The end of the gun is at 1 meter above the ground. This gun is shoot horizontally with no air resistance. The cannon ball hits the ground 1.32 meters ahead from it was shoot. What is the cannon ball's initial velocity?
Saturday, June 14, 2014 at 5:18pm

Physics
A person is carrying a plank of wood 2.00 m long with one hand pushing down on it at one end with a force F1 and the other hand holding it up at 50.0 cm from the same end of the plank with force F2. If the plank has a mass of 20.0 kg and its center of gravity is at the middle ...
Saturday, June 14, 2014 at 5:13pm

Physics
The Yukon Quest, an annual dog-sled race between Whitehorse in the Yukon and Fairbanks in Alaska, covers a gruelling distance of 1.61 × 103 km. Assuming that the average speed of the dog team that set a course record is 6.28 km/h, determine the best time for this race. ...
Saturday, June 14, 2014 at 12:50pm

Physics
An unknown mass has an acceleration of 2 m/s2 to a 1 kg body.if the same force accelerate another body of 8 m/s2 .what is the mass of the body?
Saturday, June 14, 2014 at 9:04am

Physics
A 10 kg is acted upon by a force of 90 N .What acceleration is imparted?
Saturday, June 14, 2014 at 9:01am

PHYSICS
racing car accelerates uniformly. changes with following average speeds 20m/s for 2sec ;40m/sec for 2s and 60m/s for 6sec . what is overall average speed of car
Saturday, June 14, 2014 at 5:43am

Physics
A 0.020 rubber stopper is swung in a horizontal circle by 0.80 cm thread that makes 30.0 revolution every 20 seconds. a.) what is the stopper's speed? T=? v=(2pi(r))/T
Saturday, June 14, 2014 at 12:16am

Physics
An object is 30.0 cm to the left of a convex lens with a focal length of +8.0 cm. Calculate the distance from the lens. Would it be upright or inverted?
Friday, June 13, 2014 at 9:45pm

PHYSICS
IF EARTH WERE TO ROTATE FASTER THAN ITS PRESENT SPEED THEN WEIGHT PF OBJECT WILL DECREASE AT EQUATOR BUT REMAIN UNCHANGED AT POLES why?
Friday, June 13, 2014 at 2:09pm

PHYSICS
if force acts on body WHOSE ACTION LINE does not Passes through its center of gravity then body will experience A ANGULAR ACCELERATION b linear acceleration C ZERO ACCELERATION D ZERO ACCELERATION
Friday, June 13, 2014 at 1:46pm

Physics
Okay last question I need help with Monochromatic light of 605 nm falls on a single slit, which is located 85 cm from a screen. The first dark band appears at 5.4 mm from the center. How wide is the slit? 0.001 mm 0.050 mm 0.095 mm 1.50 mm
Friday, June 13, 2014 at 1:08pm

Physics
A singer moves a note up one octave. How has the sound changed? The amplitude has decreased The wavelength has increased The speed has increased The frequency has increased <-- im not sure, but i'm thinking that it's this one
Friday, June 13, 2014 at 12:58pm

Physics
A forklift exerts an upward force of 2.00*10^3 N on a box as it moves the box 5.00 m higher. How much work does the forklift do? 500 J 1.00*10^3 J 1.00*10^4 J <--- 0.00 J
Friday, June 13, 2014 at 12:46pm

Physics
How would i solve this? A 10.0 kg ball falling at 10.0 m/s hits a pile of feathers and comes to a complete stop in 10 s. What force does the pile of feathers exert to stop the ball? 10 N 20 N 100 N 200 N
Friday, June 13, 2014 at 11:37am

physics
A person standing on top of a building throws a ball with a horizontal velocity of 14 m/s. If the ball strikes the ground 65 m from the base of the building, how high is the building?
Friday, June 13, 2014 at 10:10am

Physics
an ice block at 0 degree celcius is dropped from height 'h' above the ground. what should be the value of 'h' so that it just melts completely by the time it reaches the bottom assuming the loss of whole gravitational potential energy is used as heat by the ice...
Friday, June 13, 2014 at 10:04am

PHYSICS
ANGULAR VELOCITY OF SECOND HAND OF WATCH IS a 2pi /30sec B pi/30sec C pi/60sec D PI/1800
Friday, June 13, 2014 at 9:14am

PHYSICS
monkey is accelerating down string whose breaking strength is two third of its weight the min acceleration of monkey should be A 1/3g B 2/3g C G d ZERO
Friday, June 13, 2014 at 9:09am

physics
on a trip a car covers 42.3 miles in 40.0 minutes. find the average velocity in m/s and km/hr
Friday, June 13, 2014 at 9:02am

physics
A car of mass 537 kg is moving 32.0° North of East at a speed of 22.7 m/s. What is the magnitude of the momentum of the car? (magnitude - how big is it? ignore direction)
Friday, June 13, 2014 at 8:11am

Physics
Identical point charges of +1.1 ¦ÌC are fixed to three of the four corners of a square. What is the magnitude q of the negative point charge that must be fixed to the fourth corner, so that the charge at the diagonally opposite corner experiences a net force of ...
Friday, June 13, 2014 at 3:49am

Physics
A proton and an electron are moving due east in a constant electric field that also points due east. The electric field has a magnitude of 8.0 ¡Á 104 N/C. Determine the magnitude of the acceleration of the proton and the electron.
Friday, June 13, 2014 at 3:46am

physics
The weightless strut in the figure below is not attached to the wall; it is prevented from falling only by friction. (Let w = 360 N, L = 5.25 m and h = 3.25 m.) (a) Find the magnitude of the force of friction between the wall and the strut. (b) Find the normal force exerted by...
Thursday, June 12, 2014 at 7:54pm

physics
If the coaster is going to make it to point C it needs to start with some initial velocity. If point C is 21 meters high and the coaster starts at a height of 20 meters, what would its initial velocity need to be if no energy is lost to friction?
Thursday, June 12, 2014 at 7:48pm

physics
(a) Find the force P that must be applied to a piston of area 10.60 cm2 to produce sufficient fluid pressure to support a car weighing 12,101 N by means of a column of fluid of cross sectional area 285 cm2 as seen in the figure below. F1/A1=F2/A2 F1=F2*A1/A2 12101*10.6/285 =...
Thursday, June 12, 2014 at 7:37pm

Physics
An object with mass 3.0 kg is executing simple harmonic motion, attached to a spring with spring constant k =210 N/m. When the object is 0.23 m from its equilibrium position, it is moving with a speed of 0.72 m/s. (a) Calculate the amplitude of the motion. m (b) Calculate the ...
Thursday, June 12, 2014 at 3:17pm

Physics
A 7.50 kg bowling ball strikes a stationary 4.50 kg bowling ball. After the collision, the 4.50 kg ball is traveling 8.50 m/s 30.0° east of north; the 7.50 kg ball is traveling 6.50 m/s 20.0° south of east. What was the initial velocity (magnitude and direction) of the...
Thursday, June 12, 2014 at 3:16pm

physics
A mass m is gently placed on the end of a freely hanging spring. The mass then falls 21.3 cm before it stops and begins to rise. What is the frequency of the oscillation? I found the same question (with a different length) posted on here, but following the steps of the answer ...
Thursday, June 12, 2014 at 3:00pm

physics
A spring is stretched by 0.72 m from its orginal length with an external force of 10.5. What is the spring constant, k, of the spring?
Thursday, June 12, 2014 at 2:53pm

physics
A boy on ice skates is atationary on a frozen lake(no friction).He throws a package of mass 5kg at 4m/s horizontally east.the mass of the boy is 60kg.at the instant the package leaves the boy's hand,the boy starts moving. Calculate the magnitude of the velocity of the boy ...
Thursday, June 12, 2014 at 1:40pm

Physics
Three resistors of value 1.0 , 2.0 and 4.0 are connected in a parallel circuit with a 6.0 V battery. a) What is the total equivalent resistance? b) What is the across each resistor? c) The power delivered to the 4.0 resistor?
Thursday, June 12, 2014 at 1:14pm

Physics
3) What is the emf of a battery with an internal resistance of 0.15 if the battery delivers 1.5 A to an externally connected 5.0 resistors?
Thursday, June 12, 2014 at 1:03pm

physics
A 200 – W computer power supply is on 10 hours per day. If the cost of electricity is $0.15/kWh, what is the cost (to the nearest dollar) to run the computer every day for a year (365 days)?
Thursday, June 12, 2014 at 12:51pm

physics
A nut-cracker has arms o.4mlong and a nut is plsaced 0.05 from the hinge. Calculate the resistance of the shell if it is broken by a force of 100N applied at the end of the cracker(assume that all the forces are parallel)
Thursday, June 12, 2014 at 12:24pm

physics
A pole AB of length 10m and weight 600N has its centre of gravity 4m from the end A, and lies on horizontal fround.calculate the force required to begin to lift the end.why would this force applied at the end A,not be sufficient to lift the end A?
Thursday, June 12, 2014 at 12:21pm

physics
A nut-cracker has arms o.4m long and a nut is placed 0.05m from the hinge. Calculate the resistance of the shell if it is broken by a force of 100N applied at the end of the cracker(Assume that all forces are parallel)
Thursday, June 12, 2014 at 12:17pm

Physics
A man was lost in the woods. He wanders 3 km north, then 7 km east, then 7 km south, then 4 km west. What is the magnitude and direction of his resultant displacement?
Thursday, June 12, 2014 at 9:46am

Physics
Merry go round is push by a 100 kg man Radius is 2 m how much force is exerted. Maximum force in newtons
Thursday, June 12, 2014 at 8:41am

physics
A uniform ladder AB leans against a smooth vertical wall at an angle 60degree to the horizontal.the weight of the ladder is 200N. By taking moments about a suitable point,calculate the reaction at the wall
Thursday, June 12, 2014 at 7:33am

physics
A pole AB of length 10m and weight 600N has its centre of gravity 4m from the end A,and lies on horizontal ground. Calculate the force required to beging tto lift the end. Why would this force applied at the end A not be sufficient to lift the end A
Thursday, June 12, 2014 at 7:04am

physics
An aeroplane taking off from a field has a run of 500 meters. What is the acceleration and take off velocity if it leaves the ground 10 seconds after the start ?
Thursday, June 12, 2014 at 3:14am

physics
A nut-cracker has arms o.4m long and a nut is placed 0.05m from the hinge. Calculate the resistance of the shell if it is broken by a force of 100N applied at the end of the cracker(Assume that all forces are parallel)
Thursday, June 12, 2014 at 2:40am

physics
A uniform ladder AB leans against a smooth vertical wall at an angle 60degree to the horizontal.the weight of the ladder is 200N. By taking moments about a suitable point,calculate the reaction at the wall
Thursday, June 12, 2014 at 2:38am

physics(moment/equilibrium)
A pole AB of length 10m and weight 600N has its centre of gravity 4m from the end A,and lies on horizontal ground. Calculate the force required to beging tto lift the end. Why would this force applied at the end A not be sufficient to lift the end A
Thursday, June 12, 2014 at 2:35am

physics
a mass is thrown vertically upwards with an initial velocity of 30m/s. a second mass is dropped 0.5s later from directly above the height of 60m from the mass. when do they meet and at what height?
Wednesday, June 11, 2014 at 7:05pm

Physics
A 1.8 tonne railway truck moving at a speed of 3m/s up a steady incline comes to a stop after 45m. If the sum of the friction opposing the truck amounts to 80N What is the angle of elevation of the slope? I found Fg using m*g THen I tried using v^2=u^2 + 2as to find the ...
Wednesday, June 11, 2014 at 6:52pm

physics
98. On which of these hills does the ball roll down with increasing speed and decreasing acceleration along the path? (Use this example if you wish to explain to someone the difference between speed and acceleration.) 99. If you drop an object, its acceleration toward the ...
Wednesday, June 11, 2014 at 6:24pm

Physics
The current in a river is 1.0 meters/second. Britney swims 300 meters against the current. If she normally swims with a speed of 2.0 meters/second in still water, how long does it take her to complete the trip?
Wednesday, June 11, 2014 at 3:33pm

PHYSICS
for given angle of projection if time of flight is doubled horizontal range will increase to A FOUR TIMES B thrice C once D TWICE
Wednesday, June 11, 2014 at 2:22pm

PHYSICS
ratio of average velocity and average and average speed
Wednesday, June 11, 2014 at 2:11pm

physics
A body is to be projected at an angle with a velocity 24m/s just to pass over an obstacle 14m high at adistance of24m.then angle is what.
Wednesday, June 11, 2014 at 1:36pm

Physics
A body is thrown vertically upward with initial velocity 9.8m/s what height it will attain ?
Wednesday, June 11, 2014 at 1:26pm

PHYSICS
ball is dropped from certain height another ball is projected horizontally from the same point . Which statement is correct A BOTH HIT GROUND AT SAME VELOCITY B BOTH HIT GROUND AT SAME SPEED C change of velocity during path for both balls is same D change of SPEED during path ...
Wednesday, June 11, 2014 at 1:17pm

physics
The weightless strut in the figure below is not attached to the wall; it is prevented from falling only by friction. (Let w = 360 N, L = 5.25 m and h = 3.25 m.) (a) Find the magnitude of the force of friction between the wall and the strut. Correct: Your answer is correct. (b...
Wednesday, June 11, 2014 at 12:54pm

PHYSICS
ball is dropped downwards. After 1 sec another ball is dropped from the same point . What is distance between them after 3sec A 25m B 20m C 50m D 9.8m
Wednesday, June 11, 2014 at 12:47pm

physics
if a train at 72kmphr is to be brought to rest in a distance of 200 m then its retardation is A 20m/s^2 b 10m/s^2 c 2m/s^2 d 1m/s^2
Wednesday, June 11, 2014 at 11:27am

physics
a car travels first half distance between two places with average speed of 30 km per hour and remaining half with a speed of 50 km per hour what is the average speed of the car is A 37.5KM/hr B 10km/hr //c// 42km/hr D 40km/hr
Wednesday, June 11, 2014 at 11:08am

Physics
Hi, I need help with another question! A microwave transmitter emits waves towards a metal plate. The waves strike the plate and are reflected back along their path. I really wish I could put the diagram here but I don't think that's possible... The diagram shows 5 ...
Wednesday, June 11, 2014 at 10:41am

Physics
Hi! I need help with this question... A double slit experiment, using light of wavelength 600 nm, results in fringes being produced on a screen. The fringe separation is found to be 1.0 mm. When the distance between the double slits and the viewing screen is increased by 2.0 m...
Wednesday, June 11, 2014 at 10:27am

physics
a 150 metre long train crosses a bridge of length 250 metres in 25 seconds find its velocity
Wednesday, June 11, 2014 at 7:52am

physics
A boy on a motor scooter is traveling at a velocity of 14.1 m/s when he applies his brakes in order to stop. How much time will it take him to stop if he slows down at a rate of 3.2 m/s2?
Wednesday, June 11, 2014 at 7:49am

physics
A motorist is driving at a constant velocity of 28 m/s when he decides to pass a car that is in front of him. He accelerates at a rate of 2.5 m/s2 for 3.0 seconds while passing the car. What is his velocity at the end of the 3.0 seconds?
Wednesday, June 11, 2014 at 7:46am

physics
A motorist is driving at a constant velocity of 28 m/s when he decides to pass a car that is in front of him. He accelerates at a rate of 2.5 m/s2 for 3.0 seconds while passing the car. What is his velocity at the end of the 3.0 seconds?
Wednesday, June 11, 2014 at 7:34am

physics
A student drops an object from a fourth floor window. The velocity of the object is measured at 29.28 m/s 3.0 seconds later. What is the acceleration of the object?
Wednesday, June 11, 2014 at 7:27am

Physics
The Achilles tendon is attached to the rear of the foot as shown in (Figure 1) . A person elevates himself just barely off the floor on the "ball of one foot." Assume the person has a mass of 65kg and D is twice as long as d. Find the tension FT in the Achilles ...
Tuesday, June 10, 2014 at 11:13pm

Physics
What is the maximum tension possible in a 1.15 mm diameter nylon tennis racquet string? The ultimate tensile strength for nylon is 5.00×10^8N/m2.
Tuesday, June 10, 2014 at 11:10pm

Physics
Help please How do the dark lines of an atom's absorption spectrum relate to the bright lines of its emission spectrum? A. The bright lines are at the same energies as the dark lines. B. The dark lines are at higher energies than the bright lines. C. The bright lines are ...
Tuesday, June 10, 2014 at 9:51pm

physics
A flat circular mirror of radius 0.150 m is lying on the floor. Centered directly above the mirror , at a height of 0.750 m, is a small light source. Calculate the diameter of the bright circular spot formed on the 2.90 m high ceiling by the light reflected from the mirror.
Tuesday, June 10, 2014 at 9:13pm

LA
For questions 17–19, refer to the passage below: Albert Einstein, a world-famous mathematician was born in Bavaria in 1879. He acquired Swiss nationality in 1901 and he began working at the Swiss patent office the next year. Einstein was however also publishing papers in ...
Tuesday, June 10, 2014 at 7:58pm

Physics
Determine the acceleration of a 1500 kg automobile that rolls down an incline of 30° from the horizontal if a coefficient of friction between the tires and the incline is 0.12
Tuesday, June 10, 2014 at 6:59pm

Physics
Calculate the tension in the cable connecting the two masses. Assume all surfaces are frictionless.
Tuesday, June 10, 2014 at 6:58pm

Physics
In a rescue scene during the 911 crisis, a helicopter of mass 6000 kg accelerates upwards at the rate of 0.50 m/s2 while lifting a 2500 kg piece of concrete. What is the upward force exerted by the rotors of the helicopter? What is the tension in the cable attaching the ...
Tuesday, June 10, 2014 at 6:58pm

Physics
In the following diagram there is a coefficient of friction, μ, of 0.15 between the 5.0 kg mass and the surface. Calculate the tension in the cable connecting the two masses and the resulting acceleration.
Tuesday, June 10, 2014 at 6:58pm

Physics
A force of 3.0 N and 1.0 N act on a 6.0 kg mass as shown. What is the acceleration of the 6.0 kg mass
Tuesday, June 10, 2014 at 6:57pm

Physics
A 75.0-kg cross-country skier is climbing a 3.0o slope at a constant speed of 2.00 m/s and encounters air resistance of 25.0 N. Find his power output for work done against the gravitational force and air resistance. (b) What average force does he exert backward on the snow to ...
Tuesday, June 10, 2014 at 6:41pm

Physics
(a) How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and its initial speed is 110 km/h? (b) If, in actuality, a 750-kg car with an initial speed of 110 km/h is observed to coast up a hill to a height 22.0 m above its starting point...
Tuesday, June 10, 2014 at 6:27pm

Physics
Am i Correct? 2.0 cm*.044T*/.10 s= 0.88 V Each side of a square loop of wire measures 2.0 cm. A magnetic field of 0.044 T perpendicular to the loop changes to zero in 0.10 s. What average emf is induced in the coil during this change? A. 1.8 V B. 0.088 V C. 0.88 V <-- D. 0....
Tuesday, June 10, 2014 at 5:09pm

Physics
I'm not really sure on this one... Am i correct? A maglev train requires which of the following? A. track and the train must have the different magnetic poles B. track and the train must have the same magnetic poles <--- C. magnetic poles must alternate between the ...
Tuesday, June 10, 2014 at 4:55pm

Physics
Am i correct? My work 0.10/0.20= .5 = 1/2 or is it the other way around? .20/.10? Suppose a magnetic field of 0.20 T is applied to the area within a circular loop of wire. The strength of the field is then changed to 0.10 T. By what factor is the magnetic flux changed? A. 2 B...
Tuesday, June 10, 2014 at 4:38pm

Physics
A spring with a force constant 0f 2.50 kN/M is set upright, and a wood platform of negligible weight is fastened to its upper end. A 2.50 kg mass is gently placed on the platform and released. How far does the spring compress? What is the final equilibrium position?
Tuesday, June 10, 2014 at 3:22pm

physics
(a) How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and its initial speed is 110 km/h? (b) If, in actuality, a 750-kg car with an initial speed of 110 km/h is observed to coast up a hill to a height 22.0 m above its starting point...
Tuesday, June 10, 2014 at 3:21pm

Physics
Show that the x-component of the tension force Fc in terms of its magnitude Fc is given by -0.3420 Fc
Tuesday, June 10, 2014 at 1:42pm

physics!
a 4.0 kg object has a velocity of 4.0 m/s headed east. an explosion causes it to break up into two smaller 2.0 kg objects. if one of the objects has a velocity of 3.0 m/s at an angle of 30 degrees east of north, what is the velocity of the other object after the explosion
Tuesday, June 10, 2014 at 1:16pm

physics
An object of mass 5.0 kg is attached to a string of length 2.0 m and rotating in a horizontal circle with an angular velocity of 3.0 rad/s. What is the angular momentum of the object?
Tuesday, June 10, 2014 at 1:07pm

physics
What is the angular velocity of the object shown below if it rotates about the point P in the center? The rotational kinetic energy of the object is 1.4 J, the mass M is 1.3 kg, and L is 0.50 m.
Tuesday, June 10, 2014 at 12:43pm

Physics
A toy gun uses a spring with a force constant of 300. N/m to propel a 10.0-g steel ball. If the spring is compressed 7.00 cm and friction is negligible: (a) How much force is needed to compress the spring? (b) To what maximum height can the ball be shot? (c) At what angles ...
Tuesday, June 10, 2014 at 12:33pm

Physics
A 75.0-kg cross-country skier is climbing a 3.0o slope at a constant speed of 2.00 m/s and encounters air resistance of 25.0 N. Find his power output for work done against the gravitational force and air resistance. (b) What average force does he exert backward on the snow to ...
Tuesday, June 10, 2014 at 12:33pm

Physics
. (a) How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and its initial speed is 110 km/h? (b) If, in actuality, a 750-kg car with an initial speed of 110 km/h is observed to coast up a hill to a height 22.0 m above its starting ...
Tuesday, June 10, 2014 at 12:33pm

Physics
A spring with a force constant 0f 2.50 kN/M is set upright, and a wood platform of negligible weight is fastened to its upper end. A 2.50 kg mass is gently placed on the platform and released. How far does the spring compress? What is the final equilibrium position?
Tuesday, June 10, 2014 at 12:32pm

physics
A man is playing tennis and a tennis ball (m=1.2 kg) approaches his tennis racket with a speed of 8.0 m/s. His racket is in contact with the ball for 2.0 ms and sends the ball flying in the opposite direction with a speed of 6.0 m/s. What is the magnitude of the average force ...
Tuesday, June 10, 2014 at 12:29pm

physics
a vehicle is accelerating on a straight road. Its velocity at any instant is 30 km/hr, after 2 s, it is 33.6 km/hr and after further 2 s, it is 37.2 km/hr. Find the acceleration of vehicle in m/s^2
Tuesday, June 10, 2014 at 10:43am

physics
You have a box that contains 200 marbles. 99% of the marbles are green, the other 1% are white. How many green marbles would you have to remove from the box to reduce the percentage of green marbles to 98%?
Tuesday, June 10, 2014 at 10:26am

physics
A man in a circus shows jumps from a of 10m and is caught by the safety net which sags 2m due to his weight.calculate the average force exerted by the net on the man to stop his fall if the mass of the man is 60kg
Tuesday, June 10, 2014 at 6:49am

physics
A driver of a car travelling along a straight road with a speed of 72k.m./hour . Observes a sign board which gives the speed limit 54k.m./h.the signboard is 70m ahead when the driver applies break . Calculate the acceleration the car which will cause the car to pass the ...
Tuesday, June 10, 2014 at 2:55am

Physics
The air pressure on Pikes Peak in Colorado is approximately 600 millibars. What is the relationship between air pressure at the top of Pikes Peak and at sea level, where air pressure is 1013 millibars?
Tuesday, June 10, 2014 at 1:25am

physics
A skateboarder, with an initial speed of 4.2m/s , rolls virtually friction free down a straight incline of length 16m in 3.3 s.
Tuesday, June 10, 2014 at 12:42am

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