physics please HELP !
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Physics please help desprate
A basketball player throws the ball at a 38° angle above the horizontal to a hoop which is located a horizontal distance L = 5.6 m from the point of release and at a height h = 0.4 m above it. What is the required speed if the basketball is to reach the hoop? 
Physics !!!!! HELP PLEASE
A hand gun fires a 12.0 g bullet at a speed of 400 m/s. What is its kinetic energy? At what speed must a motorcycle of mass 173 kg move to have the same kinetic energy as the bullet? Express your answer in km/h. 
URGENT! PLEASE HELP QUICK PHYSICS
Summarize two observations that are contrary to the predictions based on Newton’s laws but that confirm Einstein’s explanation of gravity. Indicate how the predictions based on Newton’s theory differ from Einstein’s. 
Physics Need Help
The pile driver struck the piling with a speed of 20 m/s. At what height did the pile driver hammer have to be lifted for it to fall freely and attain that speed before striking the piling? Show steps please!!! 
Physics
trainA is moving at speed of 115 km/hr on a track on the same track 100 m away a trainB is moving at speed 25km/hr what should be the least retardation of trainA so that it doesn't collide? My answer is coming as 63 km/he but it's wrong please help? 
math(help)
please help someone explain this please!! The length of a marathon is 138,435 ft.each stride,or step,by a particular runner is 3 ft long.does the number of strides the runner takes fit evenly into the length of the race?(EXPLAIN ANSWER PLEASE)  IS 38... 
Physics
A block weighing 70.7 N rests on a plane inclined at 21.6° to the horizontal. The coefficient of the static and kinetic frictions are 0.23 and 0.12 respectively. What is the minimum magnitude of the force F, parallel to the plane, that will prevent the block from slipping? I ... 
Physics
a mass (m1) on a smooth horizontal surface, connected by a thin cord that passes over a pulley to a second block (m2), which hangs vertically. If the acceleration is .098 m/s^2 and m1 is 1.0 kg how much must m1 must be to keep it at this acceleration I got 99 kg could you ... 
physics
"An unbaked curve has a radius of curvature of 75m. On a winter day, with snow on the road, the coefficient of static friction between the tires of the car and the road is .23. What is the maximum speed with which the care can safely negotiate the cure?" r=75 and static ... 
Physics
A bicycle wheel of radius .7m is rolling without slipping on a horizontal surface with an angular speed of 2 rev/s when the cyclist begins to uniformly apply the brakes. The bicycle stops in 5 s. Through how many revolutions did the wheel turn during the 5 s of braking? I ... 
Physics
A bicycle wheel of radius .7m is rolling without slipping on a horizontal surface with an angular speed of 2 rev/s when the cyclist begins to uniformly apply the brakes. The bicycle stops in 5 s. Through how many revolutions did the wheel turn during the 5 s of braking? I ... 
Physics
A bicycle wheel of radius .7m is rolling without slipping on a horizontal surface with an angular speed of 2 rev/s when the cyclist begins to uniformly apply the brakes. The bicycle stops in 5 s. Through how many revolutions did the wheel turn during the 5 s of braking? I ... 
Physics Gravity
A projected space station consists of a circular tube that will rotate about its center (like a tubular bicycle tire) as shown in the figure . The circle formed by the tube has a diameter of about 1.1km g = R w^2 = 9,8 m/s^2 R = 550 m How do I convert the answer with this ... 
Physics
Judy, by chance, spots a potted plant falling outside the window at 2.88 m/s . Further down the same building, Judy’s boyfriend clocks the pot at 54 m/s . How far apart are the friends? The acceler ation of gravity is 9.8 m/s2 . Answer in units of m Please give right answer... 
physics
In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 3.1 m/s at an angle of 15.0° below the horizontal. It is released 0.82 m above the floor. What horizontal distance does the ball cover before bouncing? Please ... 
Physics Elena please help!
Assume you are agile enough to run across a horizontal surface at 11.60 m/s on an airless spherical asteroid of uniform density 1.0x103 kg/m3, independently of the value of the gravitational field. To launch yourself into orbit by running, what would be (a) the radius? (b) the... 
Physics
An airplane whose speed is 150km/hr climbs from a runway at an angle of 20° above the horizontal. What is its altitude two minutes after takeoff? How many kilometers does it travel in a horizontal direction during this two minute period? My work: 150cos(20) = 140.9 150sin(20... 
Physics
A novice pilot sets a plane's controls, thinking the plane will fly at 2.50 * 10*2 km/h to the north. If the wind blows at 75 km/h toward the southeast, what is the plane's resultant velocity? Use graphical techniques please show me how to solve this. the answer i need to come... 
Physics
If a 40 kg brick and a 400 kg brick each dropped from 1 m above a trampoline, find the lowest position of each brick. Assume the trampoline is a simple spring obeying Hooke's law with a k value of 12 000 N/m. So, I used mg(h+x)=1/2 k x^2 then solved for x in each case. ** Bob... 
Physics (Please help!!!)
If you are given many closed sacks filled with different amounts of identical marbles, how could you determine the weight of a single marble without opening the sacks? (Assume the weight of the sack material can be ignored.) The only thing I could think of was to weigh the bag... 
Physics
A 0.15kg bullet is fired into a 1.85kg block that is hanging from a 45cm string. What minimum initial bullet speed is required if the bullet and block are to make one complete revolution? Please show all work. I need this question answered as soon as possible! 
Physics(Please check)
There is a PV diagram with ABC and the cycle is moving clockwise. segment AB is isobaric BC is isochronic AC cannot be determined The delta U for this is zero and the W=positive. The last questions asks if the heat flow Q is positive, negative, or zero and the answer given is ... 
Physics
A 0.5 kg airtrack car is attached to the end of a horizontal spring of constant k = 20 N/m. The car is displaced 15 cm from its equilibrium point and released. a) What is the car's maximum speed? b) What is the car's maximum acceleration? c) What is the frequency f of the car... 
3mts
Can someone please let me know what these mean; 3 MTS  C, F and K and this one too 2 L in a SP of G Please and thank you so much for your help:) 3 major temperature scales  celsius, fahrenheit and kelvin 2 lenses in a standard pair of Glasses 
Social Studies
Please please point me in the direction of people contributed to Islam history i.e. contributors to medicine, poets, mathematician, astronomer. I would like to know where to start. Thanks 
ScienceHelp Please
What is a concept map. I've asked that same question yesterday as well, but I don't think anyone noticed. Can someone please tell me how to create one for the milky way,thanks in advance. 
Algebra 2 Urgent! please Help!
simplfy (10x^26xx^3)+(9x+x^3+5x^2) please show all work and steps i have been working on this problem for 10 minutes and still cant figure out how to do it. 
Algebra II
Please helpI'm totally lost What is the equation of the ellipse with foci(10,0), (10,0) and covertices (0,3),(0,3) x^2/109 + y^2/9 = 1 X62/100 + y^2/9 = 1 Please show me the steps because I have others to do and I'm really stuck 
Sociology
I do not understand the reading"what happened to the American Social Compact?" of Robert Reich although I have read it many many times. Could you please explain it in main ideas? please help me. 
please please i need more ideas in the answer
write a single paragraph which answers this question, “Who is responsible for program planning, the academic advisor or the student? Explain why.” 
The World History
I need help with the answers to exams of this subject please anyone can,, on exams007678,007680,007681,007682 please send as soon as possible thanks to the one that is willing to hlep.. 
health/help me please
I am confused because it depend on the quantity and in my question they did not list it . It can be too the METHAMPHETAMINE as 1st offense please help me pick the write answer I read it more than one time 
Social Studies 9
why do you think lawyers in land claims trials refer to the royal proclamation of 1763 more then 200 years . PLEASE PLEASE I NEED IT BY TOMORROW . !!! 
Please help with math!!
Ted Andrews bought 15 shares of Clark Company stock at $14.875. He sold them a month later at $20.375. What was his profit? Please help!! :) Thanks to everyone who helps! a)$6.50 b)$49.50 c)$80.50 d)$82.50 
Any one! Please Help!
Why did the british exercise restraint in their effrts to defeat the rebellious colonies? can someone give me an accurate brief description! i don't have my text book! please help me! 
English
"It is a moribund reader who doesn't feel the spell of its bounding anapests, as hard to ignore as a herd of reindeer on roof." I need help... Please restate it,so I can understand it better... Please help............ 
PreAlgebra
what is the surface area of a square pyramid if the slant height is 15.2 m and the base is 15.2 m? please explain it to me. this is not homework, it is a practice question and I do not understand how to solve it. Someone PLEASE help! 
Chemistry HELP PLEASE!!
write the oxidation and reduction halfreactions that occur at the anode and cathode, respectively, when MgCl2 liquid is electrolyzed using inert electrodes. HELP PLEASE!!! 
math lit ,geography,history,life science,LO
Am in grade 10 and am doing these subjects and I dnt knw what kind of career choice I can choose please guys help me out please 
math
3. the ratio of dollars earned to hours worked is 18/2 . which of the following ratios is the proportional to this? a=48/6 b=24/4 c=54/6 d=3/27 please help I think it b could someone please give me the right answer if tis is worng 
Someone Please Help me PreCalc
Determine the missing coordinate of the point (4/7,y) that lies on the graph of the unit circle in quadrant IV. Please show the steps because I need to solve more. Thank you. 
math help
Simplify √48ab^2 I'm not sure how to do this. Please help me and explain how you got the answer. Thank you so much. After I understand, I want to try the rest questions I was assigned and if you can, please let me know if it's right or wrong. 
Chemistry 112
Can someone please explain to me how to calculate reaction order with respect to something? I've read this in my textbook, and I watched videos on YouTube, but I still don't understand. Please help. 
English
PLEASE HELP ME! I have been trying all day! I need a sentence for tomorrow that follows this pattern and ends with a ! Pronounpredicate verbverbarticleproper nounverbarticle=adjectiveproper noun preposition  proper noun ! Please I'm begging HELP ME PLEASE 
Physics
For the answer to the following post, do you mean that the frequency does not depend on the radius? Posted by Johnny on Saturday, March 13, 2010 at 5:49pm. The frequency of circular motion for a charged particle moving around in the presence of a uniform magnetic field does ... 
Math please check answer
please check my answer thanks What would be the amount of compound interest on $ 8,000 invested for one year at 6 %, compounded quarterly ? (need to show all of your work ) ok this is what I got $8,000 x 0.6 = $ 480 $ 480 / 4 = $120 $120 x 0.6 / 4 = $ 121.80 $8,241.80 x 0.6 /4... 
MathAlgebra II to be exact
Come up with a new linear function that has a slope that falls in the range −1< m <0 . Choose two different initial values. For this new linear function, what happens to the function’s values after many iterations? Are the function’s values getting close to a ... 
PHYSICS
Using the motor principle explain why a motor is rotating in the direction indicated. I seriuosly have no idea, please help explain this theory to me. PHYSICS  drwls, Saturday, February 6, 2010 at 2:15pm To help you answer that question, I'd need a figure that shows what kind... 
physics
The information on a onegallon paint can is that the coverage, when properly applied, is 450 ft sq. One gallon is 231 cubic inches. What is the avg. thickness of the paint in such an application? Please explain how to do this. The answer should be in inches. 
Physics
A merrygoround accelerates from est at .870 rad/sec^2. When the merrygoround has made 4 complete revolutions, how much time has elapsed since the merrygo round started? What is the angular velocity of the merrygo round? Could someone help, please 
Physics
A car sits at a red light. Once the light turns in green, the driver accelerats at a rat of 3.5m/s^2. How far has the car moved after 6 seconds? I have so far d= (1/2)at^2 please check is it (1/2)(3.5m/s^2)(6 seconds) is the answer 1.75 m/s^2 x 6 sec=10.5 m/s^2? Thank you 
Physics
A hydraulic jack is used to move an 8896 Newton car. If the area of the output piston is 8 times that of the input piston, how much input force is required to lift the the car? Is this where I do P=PA or F1(A2)/F2 = A1(f2)/F2 F1 = A1F2/A2 Please help set this up. F2=8896 A1=8 ... 
Physics  still confused Please help
In 9.7 s a fisherman winds 2.1 m of fishing line onto a reel whose radius is 30 cm (assumed to be constant as an approximation). The line is reeled in at constant speed. Determine the angular speed of the reel in rad/s. Thank you. 
physics
A airplane is approaching you at a speed of 360km/h. If you measure the pitch of its approaching engines to be 512 Hz, what must be the actual frequency of the sound of the engines? The speed of sound in air is 345m/s answer is 364Hz please explain steps? 
Physics
I'm super confused about how to approach this problem. Please help. A ball of Styrofoam (ρ = 100 kg/m3) is totally submerged in water. The ball has a mass of 300.0 g What is the volume of the ball? If a string holds the ball when it’s in the water, what’s the tension ... 
Physics
The bulk modulus of water is B = 2.2 x 10^9 N/m2. What change in pressure Delta P (in atmospheres) is required to keep water from expanding when it is heated from 12.4 °C to 31.1 °C? I know that the equation for pressure is Delta P = Force / Area but I have no idea what I ... 
physics
A baseball thrown at an angle of 45 degrees above the horizontal strikes a building 18 m away at a point 8 m above the point it is thrown. Find the time taken by the ball to hit the building. Please show me how to set the problem up. 
Physics
A 30W led bulb and a 90W led bulb are wired in the parallel to a 120V source. You plug in a third bulb in parallel with the other two and the current increases to a 4.5A, what is the wattage of the bulb you added? Please explain how you got the answer in steps. 
Physics
A gun of mass 0.1kg has a bullet of mass 0.1kg,the bullet laves the piston when fired at a velocity of 200m/s. Find the final velocity. (a) 20m/s (b) 23m/s (c) 30m/s (d) 45m/s (e) 15 m/s Please kindly help me with the questions I posted. Thank you 
Physics
A 8.6kg rock and a 5.9 × 104kg pebble are held near the surface of the earth. (a) Determine the magnitude of the gravitational force exerted on each by the earth. (b) Calculate the magnitude of the acceleration of each object when released. For b), would the accelerations ... 
physics
a bimetallic compound strip of brass and iron is 10cm long at 20C. When heated over a Bunsen burner flame the temperature of the brass rises to 800C and the iron to 750C. Calculate the difference in lengths of the iron and brass. (Ignore the bending effect)...please help 
Physics
A 2.6 kg block slides down a 25° inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity is 0.80 m/s. The incline is 1.6 m long. (a) What is the acceleration of the block? m/s2 wb=m*g=2.6*9.8=25.48 fp=25.48sin25=10.77n Fn=... 
Physics
A mirror on the passenger side of your car is convex and has a radius of curvature with magnitude 18 cm. (a)Another car is seen in this side mirror and is 13 m behind the mirror, if the car is 1.5 m tall, what is the height of its image? I can't figure this one out! help please! 
Physics(Please help)
A paperweight, when weighed in air, has a weight of W = 6.95 N. When completely immersed in water, however, it has a weight of Win water = 4.26 N. Find the volume of the paperweight. Would I multiply the two values of weight and then by the density of water? 
Physics
Help please A wire carries a current of 5.2 A from east to west through a 6.0 m section of wire in the earth's magnetic field of 1 × 10^5 T at a location where the magnetic field points south. What is the magnitude of the magnetic force acting on the wire? 3.1 × 10^4 N 3.1... 
Physics 11
A string that is 90cm long with a diameter of 0.75 mm and a tension of 60 N has a frequency of 100 Hz. What new frequency is heard when the length of the string is 100 cm long. Anyone help me please? 
physics
please help with either or both 1. a charge of 10C is passing in 2 second through a cross sectional area of a conductor. calculate the intensity of magnetic field at a distance of 10 cm from the conductor. 2. An amount of 3X10^20 electrons is passing in a conductor in 2 ms. ... 
science/physics
A fisherman yanks a fish out of the water with an acceleration of 4.5m/s2 using very light fishing line that has a ''test'' value of 100N. The fisherman unfortunately loses the fish as the line snaps. What can you say about the mass of the fish? (please help) 
physics
need help with this question please a 1kg block starts at rest and slides down the incline. the coefficient of friction between the incline and the block is 0.1. The height of the incline is 2m, and the angle is 30 degrees. use energy consideration to find the block's speed at... 
physics  PLEASE HELP
A vertical spring (ignore its mass), whose spring constant is 980 N/m, is attached to a table and is compressed 0.160 m. (a) What speed can it give to a 0.400 kg ball when released? (b) How high above its original position (spring compressed) will the ball fly? 
physics
(how do I go about solving this, i know i need to conver 88days to secs and that would be 126,720. but I don't where to go from there, help please) What is the average linear speed of Mercury about the Sun? (The distance from the Sun to Mercury is 5.80 1010 meters. The orbital... 
physics
Find the magnitude and direction of a)the resultant b)the equilibrant of two forces 10N acting in the direction N030'E and 15N acting in the eastern direction if boths forces act at a point. Please solve nd give the details especially the B parts of the question. 
Physics  Please Help
A 60 year old person has a threshold of hearing of 81.0 dB for a sound with frequency f=10,000 Hz. By what factor must the intensity of a sound wave of that frequency, audible to a typical young adult, (sound level=43.0 dB) be increased so that it is heard by the older person... 
physics
Please help me solve !!! Water flows into a swimming pool at the rate of 9.83 gal/min. If the pool dimensions are 33.4 ft wide, 44.9 ft long and 19.9 ft deep, how long does it take to fill the pool? (1 gallon = 231 cubic inches) Answer in units of min 
Physics
Four people sit in a car. The masses of the people are 41 kg, 47 kg, 53 kg, and 55 kg. The car's mass is 1020 kg. When the car drives over a bump, its springs cause an oscillation with a frequency of 1.00 Hz. What would the frequency be if only the 41kg person were present? ... 
physics please help!
A bat moving at 6.5 m/s is chasing a ﬂying insect. The bat emits a 37 kHz chirp and receives back an echo at 37.65 kHz. At what speed is the bat gaining on its prey? Take the speed of sound in air to be 336 m/s. Answer in units of m/s 
Physics Help Please
1) two cars start at the same location and accelerate for the same amount of time. if one car has twice the acceleration of the other, how will the final speeds of the cars compare? by how much farther will the faster car outdistance the slower car? 
physics
On her trip from home to school, Karla drives along three streets after exiting the driveway. She drives 1.85 miles south, 2.43 miles east and 0.35 miles north. Determine the magnitude of Karla's resultant displacement. explanation on answer please 
Physics
Light is shone from a liquid onto the air. The angle of incidence in the liquid is 45◦. The angle of refraction is measured to be 60◦ to the nearest degree. What is the refractive index of the liquid can anyone help please, I'm really stoked with this question and I'm not ... 
math please help!! asap
what is the vertical and horizontal difference between the two eqautions on a graph? Here are the eqautions y=2x+3 y=2x4 please help me on this. These two eqautions when graphed are parralell to each other i believe. But im not sure how to calculate the difference in ... 
GRADE 12 PHYSICS AGAIN
it has been 2 hours, can't someone please help me? I need to know if what I did was right, I think it is wrong and one of the numbers is supposed to subtracted instead of added. 2.44(t+1)^2 = 2.44 (t^22t1) d=2.44t^24.88t+2.44 & then 1.83t^2=2.44t^24.88t+2.44 0=0.61t^24.88... 
physics.
A steel beam is used in the construction of a skyscraper. By what fraction (change in L)/Lo does the length of the beam increase when the temperature changes from that on a cold winter day (15 degree F) to that on a summer day (+ 105 degree F)? I got 0.00144 for the answer, ... 
Physics
A pendulum of a given mass is pulled back through a given vertical height and released to swing back down to a 'wall' where it impacts. Can i use mg delta h to get E kin; and then use E= half mv^2 to get the collision impact velocity? Would someone check my thinking please? ... 
physics help please
Consider a system in which 3.60 mol of an ideal monatomic gas is expanded at a constant pressure of 101 kPa from an initial volume of 2.15 L to a final volume of 3.87 L. (b) Find the change in temperature for this process. ? K (c) Determine the amount of heat added to or ... 
physics
please help me!! i need to explain what is the easiest angle to lift an object. to use as less newton as possible/ the object will lay on surface that i can state its degree/ the degree that requiers the lowest force needed is 26.91 i found it but my proffesor wants me to give... 
physics
Water drops over 49 m high Niagara Falls at the rate of 6.0 106 kg/s. If all the energy of the falling water could be harnessed by a hydroelectric power plant, what would be the plant's power output hey can you please do this one step at a time, i couldn't understand the ... 
Physics
A single photon in empty space is converted into an positron and an electron, each with rest mass 511Mev. (a) show this transformation is not possible (dynamaically). (b)How could this transformation be made posible. (c)what is the minimum photon energy required to enable the ... 
Physics
Consider two objects, A and B, both undergoing SHM, but with different frequencies, as described by the equations xsuba= 2.0msin(2.0t) and xsubB = 5.0msin(3.0t), where t is in seconds. After t = 0, find the next three times t at which both objects simultaneously pass through ... 
physics
A highway curve has a radius of 123 m. At what angle should the road be banked so that a car traveling at 26.5 m/s has no tendency to skid sideways on the road? [Hint: No tendency to skid means the frictional force is zero.] I can't get this one right either please someone ... 
Physics PLEASE HELP
A toy race car starts from rest on a circular track of radius 4.30 m. The cars speed increases at the constant rate of 8.80 m/s2. At the point where the magnitudes of the centripetal and tangential accelerations are equal, determine (a) the speed of the race car. b) the ... 
Physics
At what rate will a pendulum clock run on the Moon, where the acceleration due to gravity is 1.63 m/s2 , if it keeps time accurately on Earth? That is, find the time (in hours) it takes the clock’s hour hand to make one revolution on the Moon. provide solutions and ... 
College Physics PLEASE HELP
A cylindrically shaped piece of collagen is being stretched by a force that increases from 0 to 3.0 x 10^2 N. The length and radius of the collagen are 2.5 and 0.091 cm. Young's Modulus is 3.1 x 10^6 N/m^2. a.) If the stretching obeys Hooke's Law, what is the spring constant... 
Physics; help please :)
A transverse wave is observed to be moving along a lengthy rope. Adjacent crests are positioned 2.4m apart. Exactly six crests are observed to move past a given point along the medium in 9.1 seconds. Determine the wavelength, frequency and speed of these waves. tHank you :) 
Physics  check answer please
Refraction is: a) the way light behaves when it goes through a narrow opening b)the way teo light sources interact to produce interference patterns c) the absorption of one component of the electric field d) none of the above are correct my answer: d 
Physics II
Please can anyone explain. Thank you. A rocket is launched vertically from ground with a constant acceleration. If the rocket emits a burst of sound every five seconds after launching, find the difference of intensity levels observed at the launching site for the first and the... 
physics  another question
Sam is sitting in her fishing boat watching a trout swim below the surface. She guesses the apparent depth of the trout at 2.0m. She estimates that her eyes are about 1.0 m above the water's surface, and that the angle at which she's observing the trout is 45 degrees. b) ... 
Physics(Please check)
After 14.6 s, a spinning roulette wheel has slowed down to an angular velocity of 1.22 rad/s. During this time, the wheel has an angular acceleration of 4.51 rad/s2. Determine the angular displacement of the wheel. I did w0= wf + (4.51)(14.6) = 1.22+45.1 46.32(14.6)  (1/2)(4... 
college finance
hey...last one please..please...the accelerating colection..please... Doria's Corporation makes sales of $2,160,000 per annum. The average age of accounts recievable is 30 days. Management considers shortening credit terms by 10 days. Cost of money is 18% how much will the ... 
Biology
Why is it important to understand the characteristic of life in a health care setting? Can someone please help me with this!!!??? I'm really confused and I'm not sure how answer this... Can you please just give me a few ideas to get started?? I'm thinking that people working ... 
Physics HELP!!!!!!!!
A recording engineer works in a soundproofed room that is 47.5 dB quieter than the outside. If the sound intensity in the room is 1.40 x 10^10 W/m2, what is the intensity outside? I have done this numerous times and it is still wrong! 47.5 = 10 log (1.4x 10^10/1x 10^10) ...