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August 30, 2014

Homework Help: Science: Physics

Recent Homework Questions About Physics

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physics
A piece of iron block moves across a rough horizontal surface before coming to rest. The mass of the block is 1.8 kg, and its initial speed is 3.8 m/s. How much does the block's temperature increase, if it absorbs 69% of its initial kinetic energy as internal energy? The ...
Monday, April 21, 2014 at 12:56am

Physics waves- check answers please
1. In a standing wave, the medium at the tip of a loop is a) showing destructive interference b) not moving c) at the original amplitude of the wave d) showing constructive interference my answer: b 2. If a motorcycle is travelling toward an observer the frequency the observer...
Monday, April 21, 2014 at 12:29am

physics
If a boulder of 9.7 tons is placed on a 70 degree incline, how much extra force would be needed to push the boulder up if the incline increases up by 5 degrees?
Sunday, April 20, 2014 at 10:02pm

physics
Find the distance on a flat screen between the principal image and the second order bright fringe for red light(wavelength=664nm)if there are 900 slits per centimeter and the screen is 2.75 meters from the slits.
Sunday, April 20, 2014 at 7:25pm

physics
A square room has 3 mirrored walls of length L with one side missing. A laser is fired from the center of the open side of the room with an angle of incidence, I, toward the wall on the right. If the reflected beam is to hit a target on the back wall .80 of L from the right ...
Sunday, April 20, 2014 at 7:17pm

Physics waves
I am stuck with both of these questions. Thanks in advanced! 1. If one tone has a frequency of 110 Hz and another tone is played near it with a tone of 113 Hz, the beat frequency is ___ Hz 2. A standing wave has 3 nodes in a string 20 m long. The wavelength of this wave is __ ...
Sunday, April 20, 2014 at 7:16pm

Physics waves- check answers please
1. If a bat emits 10 sounds in 5 seconds, what is the frequency of the bat's vocal outbursts (rounded to first decimal place) My answer: 2.0 Hz 2.If one crest has a 3 cm amplitude and interacts with another pulse to produce a crest 8 cm high this demonstration" a) ...
Sunday, April 20, 2014 at 6:22pm

physics
When heat transfers into a system, is the energy stored as heat? Explain briefly.
Sunday, April 20, 2014 at 4:55pm

Physics
I've been working on this problem for close to an hour now and keep getting very wrong numbers... The two objects with different mass (m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown in the figure are released from rest, with one object at a height of 0.91 m...
Sunday, April 20, 2014 at 4:42pm

Physics
A 60 man choir sings with the sound intensity of 70 dB in a 12m distance from the choir. a) What is the average sound intensity in this distance? b) What is the sound intensity in a 20 m distance ? Help please :)
Sunday, April 20, 2014 at 2:43pm

Physics
A man pulls a rope attached to a crate with a force of 120 N. If the rope makes an angle of 130 degrees with the ground, find the components of the force.
Sunday, April 20, 2014 at 1:07pm

physics
A 150-g block on the end of a spring with a spring constant of 35 N/m is pulled aside 25 cm and released from rest. In the electrical analog the maximum charge on the capacitor is 0.25 C.The maximum current in the LC circuit is
Sunday, April 20, 2014 at 12:57pm

physics
a bus decreases its speed from 80kmh-1to 60kmh-1 in 5 sec find the acceleration
Sunday, April 20, 2014 at 10:30am

Physics
Table 1: Temperature and volume data Trial Temperature (Celsius) Volume (mL) Starting Volume Room Temperature = Hot Water Trial 1 106 5.2ml Hot Water Trial 2 107 5.4ml Cold Water Trial 1 lo 4.3ml Cold Water Trial 2 lo 4.3ml PLOT AREA (Insert a graph that you either drew here ...
Sunday, April 20, 2014 at 7:45am

Physics
The inner and outer surfaces of a cell membrane carry a negative and positive charge, respectively. Because of these charges, a potential difference of about 0.070 V exists across the membrane. The thickness of the membrane is 0.000000008 m. What is the magnitude of the ...
Saturday, April 19, 2014 at 10:16pm

Physics
The anode (positive terminal) of an X-ray tube is at a potential of +125000 V with respect to the cathode (negative terminal). (a) How much work (in joules) is done by the electric force when an electron is accelerated from the cathode to the anode? (b) If the electron is ...
Saturday, April 19, 2014 at 9:44pm

Physics
A lost shipping container is found resting on the ocean floor and completely submerged. The container is 6.0 m long, 2.2 m wide, and 2.3 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 ...
Saturday, April 19, 2014 at 6:56pm

Physics
A physics student who is late for school is trying to catch her bus. The student is 10 m behind the bus as the bus starts from rest and begins to accelerate at 0.5 m/s2 away from her. If the student continues running at a steady 3 m/s, will she catch her bus?
Saturday, April 19, 2014 at 4:58pm

Physics
While driving her new fuel efficient mini-car, Zelda changes her velocity from 22 km/h [forward] to 85 km/h [forward] while driving 2.0 × 102 m. What is her average acceleration ?
Saturday, April 19, 2014 at 4:58pm

physics
a 6.0 kW electric oven is connected to a fuse box by a cable of resistance 0.25 ohms. when the cooker is switched on at full power, a current of 26 A passes through it. Calculate the potential difference between the two ends of the cable and the power wasted in it because of ...
Saturday, April 19, 2014 at 2:00pm

Physics
A 245 g toy car is placed on a narrow 70-cm-diameter track with wheel grooves that keep the car going in a circle. The 1.0 kg track is free to turn on a frictionless, vertical axis. The spokes have negligible mass. After the car's switch is turned on, it soon reaches a ...
Saturday, April 19, 2014 at 1:31pm

Physics
Concider the arrangement of four 1miroC point -charges located at allfour coners of a square with 4cm sides.Calculate the electric field due to the charges in the center of the square.
Saturday, April 19, 2014 at 11:26am

physics
Please help me !!! for solution of this question Water enters a horizontal pipe with a rectangular cross section at a speed of 1.00 m/s. The width of the pipe remains constant but the height decreases. 27.3 m from the entrance, the height is half of what it is at the entrance...
Saturday, April 19, 2014 at 10:51am

Physics
A mass accelerates uniformly when the resultant force acting on it is......?
Saturday, April 19, 2014 at 10:17am

physics
Water enters a horizontal pipe with a rectangular cross section at a speed of 1.00 m/s. The width of the pipe remains constant but the height decreases. 27.3 m from the entrance, the height is half of what it is at the entrance. If the water pressure at the entrance is 2921 Pa...
Saturday, April 19, 2014 at 9:26am

physics problem
The density of a sample of air is 1.157 kg/m3, and the bulk modulus is 1.42 · 105 N/m2. a) Find the speed of sound in the air sample. -----> I found it 350.3 m/s and its correct. b) Find the temperature of the air sample. Give answer in °C. ----> I cant find ...
Saturday, April 19, 2014 at 9:04am

physics
a mass of 10 kg is suspended from a spring balance .it is pulled aside by a string so that it an angle 60 with the vertical.the new reading of the balance is ??
Saturday, April 19, 2014 at 8:24am

physics
Two forces F1 and F2 ifF1is double that ofF2 and the resultant is perpendicular on F1 then the angle betwee them is Expain ans with reason and diagram
Saturday, April 19, 2014 at 5:52am

Physics
A large water tank has an inlet pipe and an outlet pipe. The inlet pipe has a diameter of 2.19 cm and is 2.13 m above the bottom of the tank. The outlet pipe has a diameter of 5.49 cm and is 4.85 m above the bottom of the tank. A volume of 0.359 m3 of water enters the tank ...
Friday, April 18, 2014 at 10:14pm

Physics
1) Determine the extension of the trampoline when a 200 kg person stands on the trampoline. (k=12000) 2) If on the first push, the trampoline went 8.0 cm below its position in part 1, find the average force exerted by his leg muscles? For the first question i was able to get 0...
Friday, April 18, 2014 at 10:11pm

Physics
f a 40 kg weight and a 200 kg weight each dropped from 1 m above the trampoline, find the final position of each weight. Assume the trampoline is a simple spring obeying Hooke's law with a k value of 12 000 N/m. I was able to get the answer to this, using mg(h+x) = 1/2kx^x...
Friday, April 18, 2014 at 9:24pm

physics
Two stars are 4.40 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.03 m and just detects these stars as separate objects. Assume that light of wavelength 550 nm is being observed. Also assume that diffraction effects...
Friday, April 18, 2014 at 3:19pm

Physics
The acceleration due to gravity on Earth is 9.80 m/s2. If the mass of a dog is 40.0 kg, what is the weight of the dog?
Friday, April 18, 2014 at 9:49am

physics
A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true?
Friday, April 18, 2014 at 7:46am

physics
A singly ionized helium atom is in the ground state. It absorbs energy and makes a transition to the n = 3 excited state. The ion returns to the ground state by emitting two photons. What are their wavelengths of a lower and higher energy photon?
Thursday, April 17, 2014 at 10:12pm

physics
What is the de Broglie wavelength of a 5.0-eV electron?
Thursday, April 17, 2014 at 10:11pm

physics
A laser emits 1.42 1018 photons per second in a beam of light that has a diameter of 1.82 mm and a wavelength of 524.0 nm. Determine each of the following for the electromagnetic wave that constitutes the beam. (a) the average electric field strength (b) the average magnetic ...
Thursday, April 17, 2014 at 10:11pm

physics
The moon's diameter is 3.48 106 m, and its mean distance from the earth is 3.85 108 m. The moon is being photographed by a camera whose lens has a focal length of 48.5 mm. (a) Find the diameter of the moon's image on the slide film. (b) When the slide is projected onto...
Thursday, April 17, 2014 at 10:10pm

physics
In a Young's double-slit experiment, the angle that locates the second dark fringe on either side of the central bright fringe is 7.2°. Find the ratio d/λ of the slit separation d to the wavelength λ of the light.
Thursday, April 17, 2014 at 10:09pm

physics
compute the kinetic energy of an 1800 lb automobile traveling at 30 mi/hr. how many times as great is the kinetic energy if the velocity is doubled? compute the kinetic energy, in erg and in joules, of a 2 gram bullet travelling at 500 m/sec.
Thursday, April 17, 2014 at 6:37pm

Physics
The cars (2 cars) are pulling a vault out of the wall of a police station. What is the acceleration and velocity from rest? This question comes from the vault heist scene in the movie Fast 5. you can use what even distance and time to find it. The weight of the car and vault ...
Thursday, April 17, 2014 at 6:37pm

Physics 1
What torque is needed to accelerate a 70Kg disk with a 20 cm radius from rest to 10 rad/s?
Thursday, April 17, 2014 at 6:10pm

Physics 1
What is the rotational kinetic energy of the Earth in its orbit around the sun?
Thursday, April 17, 2014 at 6:09pm

Physics 1
Two balls have the same size and mass. One is hollow, the other one is solid. How would you determine which is which without breaking them apart?
Thursday, April 17, 2014 at 4:48pm

Physics 1
If you see an object rotating, is there necessarily net torque acting on it? Explain
Thursday, April 17, 2014 at 4:47pm

Physics
Find Acceleration and velocity of vault or car(from rest). This is info from the movie Fast 5(Vault Heist). time = 15s Vault ≈ 74,750 lb ≈ 33,903.03 kg Car ≈ 1900 kg Money in vault ≈ 4,900 kg Estimate coefficient (tires & concrete) ≈ 1 Estimate ...
Thursday, April 17, 2014 at 4:04pm

physics
a window easher pushes his brush up a vertical window at constant velocity by applying a force F as shown below. The brush weighs 12 N and the coefficient of the kinetic friction is 0.2. find the magnitude of force F.
Thursday, April 17, 2014 at 11:52am

physics
Two blocks are connected by a light string that passes over a massless, frictionless pulley as shown. The coefficient of friction between the 4kg block and the surface is 0.4. Find the acceleration of the system and the tension in the string.
Thursday, April 17, 2014 at 11:49am

Physics
Bioluminescence Some species of dinoflagellate (a type of unicellular plankton) can produce light as the result of biochemical reactions within the cell. This light is an example of bioluminescence. It is found that bioluminescence in dinoflagellates can be triggered by ...
Thursday, April 17, 2014 at 12:34am

Physics
an open tank contains a layer of oil floating on top of a layer of water (of density 1000 kg/m3) that is 3.0 m thick, as shown. What must be the thickness of the oil layer if the gauge pressure at the bottom of the tank is to be 9.1×104 Pa? The density of the oil is 880 ...
Thursday, April 17, 2014 at 12:33am

Physics
How Many Capillaries? The aorta has an inside diameter of approximately 2.1 cm, compared to that of a capillary, which is about 1.0×10−5m (10 μm). In addition, the average speed of flow is approximately 1.0 m/s in the aorta and 1.0 cm/s in a capillary Assuming...
Thursday, April 17, 2014 at 12:32am

Physics
A Blowhard Tests of lung capacity show that adults are able to exhale 1.5 liters of air through their mouths in as little as 1.0 second. A. If a person blows air at this rate through a drinking straw with a diameter of 0.49cm , what is the speed of air in the straw? v = ___ m/...
Thursday, April 17, 2014 at 12:32am

Physics
A 77 kg window cleaner uses a 13 kg ladder that is 7.1 m long. He places one end on the ground 3.8 m from a wall, rests the upper end against a cracked window, and climbs the ladder. He is 3.9 m up along the ladder when the window breaks. Neglect friction between the ladder ...
Wednesday, April 16, 2014 at 11:32pm

Physics
A rope of length L = 5.2 m with a total mass of m = 0.275 kg is tied to a hook rigidly mounted into a wall. A pulse of height 1.9 cm is sent down the rope. The tension in the rope is F = 29 N. (B) What is the height of the pulse that returns?
Wednesday, April 16, 2014 at 8:34pm

physics
calculate the image positions and magnifications for an object 3cm tall and a mirror of focal length +12 with the object at the following positions: 2.5 f, 2.0 f, 1.5 f, 0.5 f. please help me don't understand it at all. it would be best if you can explain it to me rather ...
Wednesday, April 16, 2014 at 5:06pm

physics
A hailstone traveling with a velocity of 43 meters/second comes to a virtual stop 0.28 seconds after hitting water. What is the magnitude of its acceleration in the water
Wednesday, April 16, 2014 at 4:51pm

physics
Putting a lid on a boiling pot greatly reduces the heat transfer necessary to keep it boiling. Explain why
Wednesday, April 16, 2014 at 3:19pm

Physics
A person pushes with a horizontal force of 25 N 4kg block, initially at rest on a horizontal table, a distance of 3m. The coefficient of kinetic friction between the block and table is 0.35. determine external work on the block-table system. the energy dissipated by friction ...
Wednesday, April 16, 2014 at 12:41pm

Physics
what will be the final temp of 500g of 21c waterbullets are dropped in? when 500g of 324c lead
Wednesday, April 16, 2014 at 12:14pm

physics
sf
Wednesday, April 16, 2014 at 11:21am

Physics
A ladder 13 feet long leans against a vertical frictionless wall with its lower end 5 feet from the wall. the ladder weighs 80 lbs and its center of gravity is at its center. Find the magnitude and direction of the force exerted on the lower end of the ladder.
Wednesday, April 16, 2014 at 10:49am

physics
A10m long ladder of mass 18kg leans against a frictionless wall. The ladder makes a 20 angle with the wall. The cofficient of friction between the ladder and the ground is 0.3. How far up the ladder can a 75kg man climb before the ladder slips?
Wednesday, April 16, 2014 at 10:29am

physics
Which of the following statements about a system in resonance is true A.The energy of the system is always increasing. B.The greater the damping the larger the amplitude of the oscillations C.The driving force is always in the direction of the velocity. D.The frequency of the ...
Wednesday, April 16, 2014 at 9:42am

physics
Your town is installing a fountain in the main square. If the water is to rise 26 m (85.3 feet) above the fountain, how much pressure must the water have as it moves slowly toward the nozzle that sprays it up into the air? Assume atmospheric pressure equal to 100,000 Pa.
Wednesday, April 16, 2014 at 9:10am

Physics please help?????
The figure shows three rotating, uniform disks that are coupled by belts. One belt runs around the rims of disks A and C. Another belt runs around a central hub on disk A and the rim of disk B. The belts move smoothly without slippage on the rims and hub. Disk A has radius R; ...
Wednesday, April 16, 2014 at 7:35am

national academy physics
a circular track is made on which an athlete has to cover three rounds to complete a 1000m run.during the run find the distance and magnitude of displacement of the athlete
Wednesday, April 16, 2014 at 7:21am

Physics
Gravity on Mars is 1/3 of that on earth. If Mars atmosphere is only 2 km thick, what is atmospheric pressure on Mars?
Wednesday, April 16, 2014 at 4:32am

Physics
An airplane is flying at an altitude of 2,000 m with a speed of 216 m/s. What is the pressure of air outside the plane?
Wednesday, April 16, 2014 at 4:31am

physics
An object floats on water with 84% of its volume below the surface. The same object when placed in another liquid floats on that liquid with 74% of its volume below the surface. Determine the density of the unknown fluid
Wednesday, April 16, 2014 at 2:41am

Math/Physics
John is driving at a constant speed of 20.0 m/s when he passes Jane, who is traveling in the same direction at 15.0 m/s at the moment that John passes her. If Jane is accelerating at 2.0 m/s2, how far will Jane drive before she catches up to John? How much time passes from ...
Tuesday, April 15, 2014 at 11:13pm

Physics
A crate begins sliding down a frictionless incline of 25.0o. If the objects begins sliding from rest and takes 1.50 sec to slide down the incline, what is the speed of the crate as it leaves the incline? How long is the incline?
Tuesday, April 15, 2014 at 7:54pm

Physics
John is driving at a constant speed of 20.0 m/s when he passes Jane, who is traveling in the same direction at 15.0 m/s at the moment that John passes her. If Jane is accelerating at 2.0 m/s2, how far will Jane drive before she catches up to John? How much time passes from ...
Tuesday, April 15, 2014 at 7:54pm

college physics
A reflecting telescope has a radius of curvature of 3m for its objective mirror and a radius of curvature of -1.5 for its eyepiece mirror. If the distance between the two mirrors is 0.90 m, how far in front of the eyepiece should you place the electronic sensor to record the ...
Tuesday, April 15, 2014 at 4:06pm

Physics
The figure shows three rotating, uniform disks that are coupled by belts. One belt runs around the rims of disks A and C. Another belt runs around a central hub on disk A and the rim of disk B. The belts move smoothly without slippage on the rims and hub. Disk A has radius R; ...
Tuesday, April 15, 2014 at 4:06pm

physics
A shout down a well produces an echo in 2.00 seconds. How deep is the surface of the water in the well? Assume the speed of sound to be 343 m/s.
Tuesday, April 15, 2014 at 4:01pm

physics
jabu phuses a cart that is of mass 5kg with a speed of 1m,s she suddenly increase the force acting on the cart to move 2m,s for a distance of 50m (a)calculate the force causing the cart to speed up
Tuesday, April 15, 2014 at 1:29pm

Physics
A ball is kicked and flies from point P to Q following a parabolic path in which the highest point reached is T. The acceleration of the ball is
Tuesday, April 15, 2014 at 12:40pm

Physics
Man stands out on the street with a frequency meter. A police car drives by with the sirens on and the frequency of the sounds measures 800 Hz when it get close but 600 Hz when the car goes away. a) What is the speed of the police car? b) What is the actual frequency of the ...
Tuesday, April 15, 2014 at 8:29am

physics
Propeller blade in aeroplane is 2m long if propeller rotates 1800rev/min compute tangential velocity.
Tuesday, April 15, 2014 at 6:07am

statistics
Leslie took two midterm exams and earned the following scores: 82 on the chemistry exam (class distribution: μ = 75, σ = 6.25) and 63 on the physics exam (class distribution: μ = 59, σ = 3.57). Rounding to two decimal points, on which exam should Leslie get...
Monday, April 14, 2014 at 10:27pm

Physics
A "reference ring" with moment of inertia Ic rests on a solid disk torsion pendulum with a moment of inertia I0. a) What is the period T0 for the motion with the disk alone? b) What is the period T1 for motion with the combined system? c) Use the expressions from a) ...
Monday, April 14, 2014 at 9:22pm

Physics
The graph below shows the force applied to a 4.0 kg cart initially at rest but free to move on a horizontal track. Forces (in N) are measured on the ordinate and times (in s) are measured on the abscissa. Use the following values for the graph: a = 4.9 and x = 2.0. Assume the ...
Monday, April 14, 2014 at 8:22pm

PHYSICS
A dog sitting 2.2m from a vertical mirror thinks its image is another dog. A)How far is the image from the dog? B)To investigate, the dog walks directly toward the mirror at 0.28m/s . At what rate does the dog approach its image?
Monday, April 14, 2014 at 6:19pm

PHYSICS
A laser is mounted on a table 1.04m above the ground, pointed at a vertical mirror a horizontal distance 3.46m away. The laser beam strikes the mirror 1.52m above the ground. Behind the laser is a wall, 2.80m from the aperture where the laser light emerges. At what height does...
Monday, April 14, 2014 at 6:18pm

physics
A 15.4g bullet traveling at 270 m/s is fired into a 0.488kg wooden block anchored to a 100 N/m spring. How far is the spring compressed? x_{compressed} = If the speed of the bullet is not known but it is observed that the spring is compressed 43.9 cm, what was the speed of ...
Monday, April 14, 2014 at 5:28pm

physics
Two wires are anchored at both ends. Wire 1 has a mass of 105 grams and a length of 6.9 m. Wire 2 has a mass of 60 grams, a length of 20 m, and a tension of 143 N. What must be the tension in Wire 1 if its third harmonic is to equal the first overtone of Wire 2? T_{wire1} =
Monday, April 14, 2014 at 5:20pm

physics
The velocity of a simple harmonic oscillator is given by; v = + 6.92*sin(10.5*t) (mks units) What is its angular frequency? omega = What is the amplitude of the motion? A = Where is the mass at the time t = 86.08 seconds? x = If the mass is 0.53 kg, what is the spring's ...
Monday, April 14, 2014 at 5:02pm

physics
the binding energy of a nucleus is 240.0 MeV. What is the mass defect of the nucleus in atomic mass units?
Monday, April 14, 2014 at 4:29pm

Physics
An object is 14 cm in front of a diverging lens that has a focal length of -7.9 cm. How far in front of the lens should the object be placed so that the size of its image is reduced by a factor of 1.9?
Monday, April 14, 2014 at 4:26pm

Physics
A magnifying glass (a positive lens) with a focal length of +6 cm is placed 2 cm above a page of print. What is the magnification of this image?
Monday, April 14, 2014 at 3:56pm

Physics
Last question i'm stuck on please help me through this. Five waves pass a dock in 2.0 s. If the waves are traveling at 10.0 m/s, then what is the wavelength of the waves?
Monday, April 14, 2014 at 1:50pm

Physics
A cue ball collides with two other snooker balls and comes to a complete stop. The angles between the centres at the point of collision are shown below. If the velocity of the incoming cue ball is 5 m/s, determine the velocities of all moving balls after the collision.
Monday, April 14, 2014 at 1:32pm

Physics
A cargo plane is flying horizontally at an altitude of 10000m with a velocity of 800km/h when a cargo pallet falls out the back ramp. (i) How long does it take to fall to the ground? (ii) How far horizontally is the pallet from where it fell off when it hits the ground? (iii) ...
Monday, April 14, 2014 at 1:25pm

physics
Four identical masses of mass 800kg each are placed at the corners of a square whose side lengths are 15.0cm . What is the magnitude of the net gravitational force on one of the masses, due to the other three?
Monday, April 14, 2014 at 12:38pm

Physics
Help me please I'm stuck on this question 2.In a thunderstorm at 20.0°C, Karen sees a bolt of lightning and hears the thunderclap 3.00 s later. How far from Karen did the lightning strike? Show your work.
Monday, April 14, 2014 at 12:33pm

Physics
A radar sends out a sound wave of 1.50 Mhz and senses it again from a moving car at a 1.40 Mhz. What is the speed of the car ?
Monday, April 14, 2014 at 8:17am

physics
A hammer with 10 J of kinetic energy hits a nail and pushes it 5.0 mm into a plank. Both the hammer and nail come to rest after the collision. What is the average force that acts on the nail while it moves the 5.0 mm?
Monday, April 14, 2014 at 4:26am

Physics
An airplane is flying at an altitude of 2,000 m with a speed of 216 m/s. What is the pressure of air outside the plane?
Monday, April 14, 2014 at 3:24am

Physics
Gravity on Mars is 1/3 of that on earth. If Mars atmosphere is only 2 km thick, what is atmospheric pressure on Mars?
Monday, April 14, 2014 at 3:21am

physics
1. A car travels down a straight, flat, level road. Initially, the car is traveling at 80.0 km/hr Northward . After traveling 0.50 0 km , the car is traveling at 95 .0 km/hr. What is the magn i tude of the car ’ s acceleration during this interval ?
Monday, April 14, 2014 at 1:09am

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