Saturday

March 28, 2015

March 28, 2015

Number of results: 65,168

**physics**

A mass with an initial combined potential energy and kinetic energy of 10,000 joules is dropped onto a fence post to drive it into the ground. The post is driven 0.25 meters into the ground before it comes to rest with the mass sitting on top of the post. How much work was ...
*January 24, 2012 by Charles*

**physic**

2. While throwing a football, you exert a forward force of 50.0 N on it and push it forward a distance of 1.2 m.
*December 23, 2010 by sabrina*

**physics**

a ball of mass 0.4 kg is initially at rest on the ground. It is kicked and leaves teh kicker's foot with a speed of 5 m/s in a direction of 60 degrees above the horizontal. What is the impulse
*November 30, 2011 by emma*

**Physics**

A child of mass m is playing on a merry-go-round which has mass 6m and radius r. Assume the merry-go-round is a uniform disk. The child is standing on the edge of the merry-go-round, which is spinning with an angular speed ω1. a) What is the moment of inertia, I1, of the ...
*November 30, 2014 by Alex*

**S.S. 1 question**

5. What did delegates decide about how the number of representatives for each state would be determined? a. Each state would get a number of representatives directly proportional to its population. b. Each state would get a number of representatives proportional to its ...
*November 8, 2012 by Jman*

**College Physics **

A 40 kg child is standing on the edge of a merry-go-round in a playground. Before they were deemed too dangerous, these were quite common. They were just huge rotating platforms you could sit on while someone spun you around in uniform circular motion until you screamed in ...
*April 8, 2012 by Taylor*

**Physics**

A block with mass m1 on a plane inclined at angle to the horizontal is connected to a second hanging block with mass m2 by a cord passing over a small, frictionless pulley, as shown. The coefficient of static friction is us and the coefficient of kinetic friction is ...
*April 14, 2012 by modjadji*

**physics**

The planet mars has a mass of 6042e23 kg and a radius of 3038e6 m. how much would a 60 kg person weigh on Mars compared to their weight on Earth? How heavy he would feel he weighed in kg on Mars?
*June 23, 2011 by edward*

**Math help understand **

Have world problem and I don't get it please explain step by step simplify and show me as many ways as possible cause one might be easier than other !! A bicycle travels at constant speed of 15km/hr. Bus starts 195km behind bicycle and catches up to bicycle in 3 hrs. What's ...
*March 20, 2014 by Annie *

**physics**

A stone is thrown straight downward with a speed of 2.2 meter per second from a height of 28 meters. What is the speed of this stone 1 second after it is released? [Neglect air resistance.]
*October 15, 2009 by Janice*

**ethics**

A person driving home late one evening on a dark, deserted road comes across a single-vehicle accident. Getting out of the car and viewing the damaged vehicle, it is clear that the lone occupant, the driver, is hurt and unconscious. Wishing to help the injured person, the "...
*April 18, 2011 by Ria*

**Statistics**

Use the multiple regression equation to predict a person's salary. Assume that the variable A is the number of years of college. Assume that the variable B is the number of years of experience. Suppose the person has 7 years of college and 3 years of experience. What should ...
*November 9, 2012 by jassi*

**statistics**

Use the multiple regression equation to predict a person's salary. Assume that the variable A is the number of years of college. Assume that the variable B is the number of years of experience. Suppose the person has 7 years of college and 3 years of experience. What should ...
*November 12, 2012 by jassi*

**Statistic help ASAP Please**

The tests done to determine if someone is HIV positive are called Enzyme immunoassay or EIA tests. The test screens a blood sample for the presence of antibodies to HIV. Like most tests, this test is not perfect. The table below shows the approximate probabilities of positive ...
*March 17, 2014 by Helen*

**Physics **

7. An early objection to the idea that the earth is spinning on its axis was that the earth would turn so fast at the equator that people would be thrown into space. Show the error in this logic by calculating the centripetal force needed to hold a 100. kg person in place at ...
*February 2, 2015 by Brian *

**essay cont.: mrs. sue**

The next step for a student to do is to take all of the information he or she learned in the class, and apply it to his or her future. For example, when one buys a house in the future, it is necessary to take out a loan. To do this, one has to consider interest rates and must ...
*November 28, 2007 by julie*

**physics**

A juggler throws a ball from height of 0.950 m with a vertical velocity of +5.50 m/s and misses it on the way down. What is its velocity when it hits the ground?
*November 14, 2010 by leila*

**physics**

A juggler throws a ball from height of 0.950 m with a vertical velocity of +4.25 m/s and misses it on the way down. What is its velocity when it hits the ground?
*December 20, 2010 by sabeen*

**physics**

anyone??? A juggler throws a ball from height of 0.950 m with a vertical velocity of +4.25 m/s and misses it on the way down. What is its velocity when it hits the ground? thanks.
*December 20, 2010 by sabeen*

**physics**

A juggler throws a ball from height of 0.950 m with a vertical velocity of +4.25 m/s and misses it on the way down. What is its velocity when it hits the ground?
*December 22, 2010 by sk*

**physics**

A cannon on a railroad car is facing in a direction parallel to the tracks (the figure below ). It fires a 99-kg shell at a speed of 105 m/s (relative to the ground) at an angle of 60 above the horizontal. If the cannon plus car have a mass of 4.6 104 kg, what is the recoil ...
*February 25, 2011 by Renee*

**physics**

A person whose mass is m = 60.5 kg steps on a mechanical bathroom scale placed on an inclined plane that makes the angle α = 31.7° with the horizontal. What is the reading on the scale? For this question I used the formula FN=mgcostetha= 60.5x9.8xcos31.7 but the answer is...
*September 28, 2014 by fresno T*

**Physics**

Please help due in less than 2 hours!! A person whose mass is m = 86.0 kg steps on a mechanical bathroom scale placed on an inclined plane that makes the angle α = 21.3° with the horizontal. What is the reading on the scale? i've tried m*g*sin(21.3) and it still says I'm ...
*February 23, 2015 by anon*

**Physics**

I fire a tennis ball from an air cannon, straight up from ground level, at initial speed v0. At the instant it reaches the top of its trajectory, I fire a second tennis ball at the same initial speed. Air resistance is negligible. At what fraction of the maximum height reached...
*February 10, 2011 by Cecille*

**Physics**

I fire a tennis ball from an air cannon, straight up from ground level, at initial speed v0. At the instant it reaches the top of its trajectory, I fire a second tennis ball at the same initial speed. Air resistance is negligible. At what fraction of the maximum height reached...
*February 12, 2011 by Cecille*

**Math**

i have to do math riddles and their hard so can you help me out with this one please "six students lined up for a free throw competition. The fourth person won the event. Place the students in order and identify the winner. Paulin went before Ayla and rowen. Ayla shot right ...
*January 2, 2010 by Daminiq*

**physics**

a person walks first a constant speed of 5.00m/s along a straight line from point A to point B and then back along the line from point B to A at a constant speed of 3.00m/s. (a) what is her average speed over the entire trip? (b) what is her average velocity over the entire trip?
*January 27, 2010 by millie*

**physics**

A stone is dropped from a 75 m high building. when this stone has dropped 15m, a second stone is thrown downward with an initial velocity such that two stones hit the ground at the same time. find a. time taken for the first stone to fall 75m. (b) the time taken for the second...
*October 19, 2010 by elaine*

**physics**

A stone is dropped from a 75 m high building. when this stone has dropped 15m, a second stone is thrown downward with an initial velocity such that two stones hit the ground at the same time. find a. time taken for the first stone to fall 75m. (b) the time taken for the second...
*October 19, 2010 by elaine*

**physics**

An airplane of mass 1.6 x 10^4 kg is moving at 58 m/s. The pilot then revs up the engine so that the forward thrust by the air around the propeller becomes 7.0 x 10^4 N. If the force exerted by air resistance on the body of the airplane has a magnitude of 6.0 x 10^4 N, find ...
*October 11, 2012 by Amy*

**Physics**

A man stands on the roof of a building that is 50 m tall and throws a rock with a velocity of 35 m/s at an angle of 50 degrees above the horizontal (a) What is the total time in the air (b) What is the horizontal distance from the base of the building to the point where the ...
*December 18, 2013 by Vlad*

**Physics**

A man stands on the roof of a building that is 50 m tall and throws a rock with a velocity of 35 m/s at an angle of 50 degrees above the horizontal (a) What is the total time in the air (b) What is the horizontal distance from the base of the building to the point where the ...
*December 18, 2013 by Vlad*

**English**

“Forward: push forward, onward, do.” How can you apply this to your life?
*October 17, 2013 by unknown*

**Chemistry**

Three people weigh on a standard mass of 2.00 g on the same balance. Each person obtains a reading of 7.32 for the mass of the standard. These results imply that the balance that was used is ___________. a) neither accurate nor precise b) accurate c) precise d) accurate and ...
*February 20, 2014 by Bryan*

**Physics**

A ball is dropped from rest from a height of 20.0 m. One second later a second ball is thrown vertically downwards. If the two balls arrive on the ground at the same time, what must have been the initial velocity of the second ball?
*August 28, 2011 by Anonymous*

**Physics**

A ball is dropped from rest from a height of 20.0m. One second later a second ball is thrown vertically downwards. If the two balls arrive on the ground at the same time, what must have been the initial velocity of the second ball?
*August 31, 2012 by Alex*

**Physics**

A ball is dropped from rest from a height of 20.0m. One second later a second ball is thrown vertically downwards. If the two balls arrive on the ground at the same time, what must have been the initial velocity of the second ball?
*August 31, 2012 by Alex*

**science**

A stone is dropped into a river from a bridge 43.9 m above the water. Another stone is dropped vertically down 1s after the first is dropped. Both stones strike the water at the same time. a) What is the initial speed of the second stone? Write an equation for the vertical ...
*September 17, 2006 by sara*

**math**

) A wierd number is a number that is the product of two consecutive primes, such as 7x11=77 . What is the least common multiple of the 5 smallest wierd number 7) According to an ancient belief, when a friend visits a sick person, 1/70 of his sickness is taken away. What is the...
*February 25, 2007 by brenton atcheson*

**Science 10**

A person hits a 45-g golf ball. The ball comes down on a tree root and bounces straight up with an initial speed of 14.0 m/s. Determine the height the ball will rise after the bounce The equation is height= 1/2 velocity^2 / g where g is 9.8m/s^2
*July 16, 2007 by Caitlin*

**physics**

Driving in your car with a constant speed of 12 m/s, you encounter a bump in the road that has a circular cross-section. If the radius of curvature of the bump is 35 m, find the apparent weight of a 63-kg person in your car as you pass over the top of the bump.
*March 6, 2011 by Randy*

**Cultural Diversity**

I have to write a 1400 to 1750 word autobiographical research paper that analyzes the influences of race as it relates to my community. In the paper I must write a first person account of how human interactions in my community have been racialized. What is an autobiographical ...
*January 12, 2010 by Susan H.*

**physics**

A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 40.0 min at 85.0 km/h, 12.0 min at 95 km/h, and 35.0 min at 30.0 km/h, and spends 35.0 min eating lunch and buying gas. Determine the average speed for the ...
*September 13, 2011 by gigi*

**statistics**

A person owns both her own business and her own home and purchases a cariety of insurances to protect them. In any one year the probability of an insurance claim on the business is .4 and on the home is .05. Assuming that these are independent events, find the probability that...
*October 2, 2009 by Sharon*

**phsyics**

A mass, m1 = 9.36 kg, is in equilibrium while connected to a light spring of constant k = 112 N/m that is fastened to a wall. A second mass, m2 = 6.71 kg, is slowly pushed up against mass m1, compressing the spring by the amount A = 0.201 m The system is then released, and ...
*November 5, 2009 by Anonymous*

**Physics**

Two pole-vaulters just clear the bar at the same height. The first lands at a speed of 8.50 m/s, and the second lands at a speed of 8.80 m/s. The first vaulter clears the bar at a speed of 1.50 m/s. Ignore air resistance and friction and determine the speed at which the second...
*October 9, 2012 by Sam*

**physical**

A block with mass m1 on a plane inclined at angle ƒÑ to the horizontal is connected to a second hanging block with mass m2 by a cord passing over a small, frictionless pulley, as shown. The coefficient of static friction is Us ƒÝ s and the coefficient of kinetic friction is Uk...
*April 5, 2012 by Lebza*

**physics**

A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 12.0 m/s. The student throws a ball into the air along a path that he judges to make an initial angle of 60.0° with the horizontal and to be in line with the ...
*February 17, 2011 by kia*

**physics**

A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 12.0 m/s. The student throws a ball into the air along a path that he judges to make an initial angle of 60.0° with the horizontal and to be in line with the ...
*February 18, 2011 by Anonymous*

**physics**

A science student is riding on a flatcar of a train traveling along a straight, horizontal track at a constant speed of 12.8 m/s. The student throws a ball into the air along a path that he judges to make an initial angle of 67.0° with the horizontal and to be in line with the...
*October 11, 2012 by sedef*

**Urgent maths homework help**

At a boarding school, in the evening, 9 students always take walks in groups of 3. How can the groups be arranged so that each person walks in a group with every other person exactly once in 4 days? I would like to know whether there is a trick to these type of questions. My ...
*February 21, 2015 by paul*

**Physics**

A person swings a 0.33 kg tether ball tied to a 5.4 m rope in an approximately horizontal circle. (a) If the maximum tension the rope can withstand before breaking is 11 N, what is the maximum angular speed of the ball?
*March 7, 2010 by John*

**enhancing children's self esteem**

I need a little help.2.according to many social scientist,adolescence ends for most people. A.when the physical and intellectual changes of puberty have occurred B.by the time the person reaches age 20. C.when they're most comfortable with and have a clear understanding of who...
*December 15, 2009 by neva*

**trig/precalc**

An airplane with a ground speed of 750 mph and a bearing of N 40 E encounters a wind of 50 mph with a bearing of S 30 E. Find the bearing and ground speed of the plane.
*December 16, 2012 by Mia*

**Physics**

An attack helicopter is equipped with a 20- mm cannon that ﬁres 198 g shells in the forward direction with a muzzle speed of 711 m/s. The fully loaded helicopter has a mass of 4810 kg. A burst of 75.3 shells is ﬁred in a 6.27 s interval. What is the resulting ...
*December 23, 2012 by Anonymous*

**math**

Twenty people apply for seven jobs that are available at fly by night aircraft company 12 are men and the rest are women. How many seven person groups have exactly three men? How many of these seven person groups have exactly three men or three women?
*May 24, 2012 by Jake*

**physics**

You are watching an archery tournament when you start wondering how fast an arrow is shot from the bow. Remembering your physics, you ask one of the archers to shoot an arrow parallel to the ground. Unfortunately the archer stands on an elevated platform of unknown height. ...
*November 17, 2010 by michaelJ*

**world history**

12. The Chinese philosopher Xunzi wrote that if a person attempted to cure rheumatism by beating a drum and sacrificing a pig to the gods, then the A. rheumatism wouldn't get better because proper therapy required playing a flute and sacrificing a chicken. B. rheumatism would ...
*October 6, 2012 by jake*

**history**

The Fourth Amendment states that the right of the people against unreasonable search and seizures of their persons, houses, papers, and personal effects shall not be violated. This amendment to the U.S. Constitution upholds which of the following common law principles? 1)The ...
*June 4, 2010 by kayci*

**calc 3**

The magnitude of a velocity vector is called speed. Suppose that a wind is blowing from the direction N45°W at a speed of 40 km/h. (This means that the direction from which the wind blows is 45° west of the northerly direction.) A pilot is steering a plane in the direction N60...
*August 31, 2012 by Becky*

**Physics...help please!**

I fire a tennis ball from an air cannon, straight up from ground level, at initial speed v0. At the instant it reaches the top of its trajectory, I fire a second tennis ball at the same initial speed. Air resistance is negligible. At what fraction of the maximum height ...
*February 11, 2011 by Cecille*

**Math**

If a pitcher throws a ball to homeplate at a speed of 57 miles per hour for the distance of 47 feet how long does it take to cross homeplate? I multiplied distance x speed and got 2679 but not sure what that means???
*August 29, 2014 by Alicia Martinez*

**precalc**

1. A plane is headed at 122 degrees with an air speed of 350mph in a wind that is blowing from 38 degrees. Find the ground speed of the plane and the speed of the wind if the actual flight was at 133 degrees. 2. A plane is heading at 20 degrees at 300mph If a wind is blowing ...
*April 14, 2013 by sarah*

**PHYSICS**

A Few questions- please help!!! also show steps! What magnitude of force, acting for 0.025 s, will change the velocity of a 100 g ball from 30 m/s eastward to 40 m/s westward? A girl holds a 1.7 kg air rifle loosely and fires a bullet of mass 2 g. The muzzle velocity of the ...
*January 4, 2012 by Dyl*

**Algebra II**

A projectile is launched from a platform 10 meters above ground with an initial upward velocity of 20 meters per second. Find the time when the projectile has returned to the initial height launch, find the time the projectile hits the ground, find the time when the projectile...
*December 8, 2011 by Julia *

**earth**

The weight (V) of an object on Venus varies directly as its weight (E) on Earth. A person weighing 120 lb on Earth would weigh 106 lb on Venus. How much would a person weighing 180 lb on Earth weigh on Venus?
*September 5, 2012 by Anonymous*

**algebra**

1.You flip a coin 30 times and get heads 11 times, so the chance of getting heads is 11/30. Is this an example of theoretical or experimental probability? theoretical experimental * 2.You have made 3 out of 10 of your last free throws. How many free throws can you expect to ...
*March 18, 2013 by Cassie*

**physics**

A new event has been proposed for the Winter Olympics. An athlete will sprint 150.0 m, starting from rest, then leap onto a 20.8 kg bobsled. The person and bobsled will then slide down a 46.0 m long ice-recovered ramp, sloped at á=21.0°, and into a spring with a carfully ...
*October 31, 2009 by Anonymous*

**physics**

A new event has been proposed for the Winter Olympics. An athlete will sprint 150.0 m, starting from rest, then leap onto a 20.8 kg bobsled. The person and bobsled will then slide down a 46.0 m long ice-recovered ramp, sloped at á=21.0°, and into a spring with a carfully ...
*November 1, 2009 by Anonymous*

**Statistics**

A recent study stated that if a person chewed gum the average number of sticks of gum he or she chewed daily was eight. To teat the claim a researcher selected a random sample of 36 gum chewers and found the mean number of sticks of gum chewed per day was 9 and the standard ...
*April 8, 2009 by Camille*

**writing**

I'm Writing a Discursive Essay on the topic "is it more difficult to be a young person today then it was 50years ago", I have these main points: "we have technology but its brought us media pressue" "Better education system but with more pressue to succed" "Medical ...
*February 19, 2012 by khabo*

**Physics**

A quarterback takes the ball from the line of scrimmage, runs backward for 8 yards, and then runs sideways parallel to the line of scrimmage for 5 yards. At this point, he throws a 49 yard forward pass straight down the field. What is the magnitude of the football's resultant ...
*February 27, 2012 by Anonymous*

**Physics doppler effect**

A person standing close to a railroad crossing hears the whistle of an approaching train. He notes that the pitch of the whistle drops as the train passes by and moves away from the crossing. The frequency of the approaching whistle is 523 Hz, and drops to 491 Hz after the ...
*May 16, 2011 by Joan*

**Math **

According to the U.S. Census Bureau's most recent data on the marital status of the 242 million Americans aged 15 years and older, 124.2 million are currently married and 74.5 million have never been married. If one person from these 242 million persons is selected at random, ...
*October 2, 2014 by Jim*

**applied physics**

an ironworker drops a hammer 5.25m to the ground. what is its speed as it hits the ground?
*April 22, 2013 by donna*

**Calculus**

Assume the world population will continue to grow exponentially with a growth constant (corresponding to a doubling time of about 52 years), it takes acre of land to supply food for one person, and there are 13,500,000 square miles of arable land in in the world. How long will...
*October 13, 2011 by Isiah*

**physics**

Air is blowing with a wind speed of 35 [mi/hr] eastward relative to the ground.Find the velocity of an eagle relative to an observer on the ground if the eagle is flying at a speed of 22 [mi/hr] westward “against” the wind.
*September 28, 2013 by ad*

**Physics**

Question 1:A child's wagon with a mass of 11 kg is moving at a constant speed of 4 m/s on a horizontal frictionless surface at the Houston Zoo. After a 4.2 kg Southern Ground Hornbill lands by vertical descent in the child's wagon, the velocity of the wagon will be Answer m/s...
*February 2, 2015 by Samiboo711*

**diversity**

How will you apply the knowledge you have learned about effective business communication and cultural diversity to your current/future job and college courses? First, think about your current or future job and college courses. Second, make a list of the things you've learned ...
*June 26, 2007 by NeNe*

**Physics**

1.) A tennis ball (mass = 57 grams) is held directly above a basketball (mass = 624 grams)that is held 4.7 meters off the ground. Both are dropped simultaneously. Assuming an elastic collision, how high above the ground does the tennis ball reach after bouncing? (Note that the...
*December 16, 2014 by Please Help*

**Physics for Life science**

1. A block of mass m=100kg rests on a level ground. With what force, parallel to the ground, must you push the block so that it is just ready to start sliding? The coefficient of static friction between the block and the ground is 0.40.
*May 3, 2010 by TangenT*

**Physics for Life science**

1. A block of mass m=100kg rests on a level ground. With what force, parallel to the ground, must you push the block so that it is just ready to start sliding? The coefficient of static friction between the block and the ground is 0.40.
*May 3, 2010 by TangenT*

**physics**

A block of mass m1 = 2.4 kg initially moving to the right with a speed of 3.3 m/s on a frictionless, horizontal track collides with a spring attached to a second block of mass m2 = 4.1 kg initially moving to the left with a speed of 1.5 m/s as shown in figure (a). The spring ...
*October 14, 2013 by Leticia*

**Maths/ Calc**

Supplies are dropped from a stationary (not moving up or down) helicopter and, after some amount of time, land on the ground with a velocity of -160 feet per second. Assumptions: Start time at t = 0 and ignore air resistance. Recall that the height function is given by y(t)= ...
*April 18, 2013 by Eliz*

**Physics**

Student A is on a 9m Hugh bridge while Student B is on the ground. Student B throws an apple up to Student B with a velocity of 18m/s. How long does it take for the apple to reach student A's hand? if student A is unable to catch the apple, how long would it take for the apple...
*January 23, 2014 by Sandara*

**Physics**

Student A is on a 9m high bridge while Student B is on the ground. Student B throws an apple up to Student B with a velocity of 18m/s. How long does it take for the apple to reach student A's hand? if student A is unable to catch the apple, how long would it take for the apple...
*January 23, 2014 by Sandara*

**Precalculus**

The volume V(t) of air (in cubic inches) in an adult's lungs t seconds after exhaling is approximately. (Do not use mixed numbers in your answer.) V(t)= 53+28.5sin(pie(t)/2-pie/2) (a) Find the maximum and minimum amount of air in the lungs. Maximum is (cubic inches) Minimum is...
*November 21, 2010 by Max*

**Classical Mechanics**

During a track event two runners, Mary, and Alice, round the last turn and head into the final stretch with Mary a distance d = 2.0 m in front of Alice. They are both running with the same speed of v0= 5.0 m/s. When the finish line is a distance L= 45.0 m away from Alice, ...
*September 15, 2013 by rya*

**physics**

When you are running and want to stop quickly, you must decelerate quickly. What is the origin of the force that causes you to stop? Estimate the maximum rate of deceleration of a person running at top speed to come to rest.
*September 11, 2009 by perry*

**physics**

A plane is flying horizontally with speed 244 m/s at a height 5670 m above the ground, when a package is thrown downward from the plane with a vertical speed v(initial) = 73 m/s. What horizontal distance is traveled by this package? The acceleration of gravity is 9.8 m/s2 . ...
*September 2, 2011 by squires*

**physics**

A plane is flying horizontally with speed 244 m/s at a height 5670 m above the ground, when a package is thrown downward from the plane with a vertical speed v(initial) = 73 m/s. What horizontal distance is traveled by this package? The acceleration of gravity is 9.8 m/s2 . ...
*September 3, 2011 by squires*

**Physics**

A science student is riding on a flatcar of a train travelling along a straight horizontal track at a constant speed of 10.0 m/s.The student throws a ball into the air along a path that he judges to make an initial angle of 60.0 degrees with the horizontal and to be in line ...
*February 17, 2013 by Sammie*

**physics**

a student standing on the roof of a 50 meter high building kicks a stone at a horizontal speed of 4 meters per second, how much time is required for the stone to reach the level ground below?
*January 16, 2011 by jack*

**reading**

different creatures are equipped to live in different places.and moose long ago adapted to bogs and lakes, deer to forests and brushlands and bighorns to mountain peaks.the pronghorn,America's smallest "big game" mammal,is beautifully fitted to life on the wide open deserts ...
*March 22, 2010 by tommy*

**physics**

A puck of mass 5.0 kg moving at 16.5 m/s approaches an identical puck that is stationary on frictionless ice. After the collision, the first puck leaves with a speed v1 at 30º to the orginal line of motion. The second puck leaves with speed v2 at 60º. The speed v1 ...
*February 26, 2012 by alex*

**physics**

A puck of mass 5.0 kg moving at 16.5 m/s approaches an identical puck that is stationary on frictionless ice. After the collision, the first puck leaves with a speed v1 at 30º to the orginal line of motion. The second puck leaves with speed v2 at 60º. The speed v1 ...
*February 26, 2012 by alex*

**physics**

Driving in your car with a constant speed of 12 m/s, you encounter a bump in the road that has a circular cross section. If the radius of curvature of the bump is r = 34 m, find the apparent weight of a 60 kg person in your car as you pass over the top of the bump in Newtons.
*December 6, 2009 by Dave*

**PHYSICS**

1....How much force needed to bring a 3200 lb car from rest to a velocity of 44 m/s in 8 sec.? 2....A ball with a mass of 2 kg move to the right with a speed of 2 m/s. It hits a ball of mass 0.50 kg which is at rest. After collision the second ball moves to the right with a ...
*February 18, 2011 by EM*

**Math/ Calculus Help1**

Supplies are dropped from a stationary (not moving up or down) helicopter and, after some amount of time, land on the ground with a velocity of -160 feet per second. Assumptions: Start time at t = 0 and ignore air resistance. Recall that the height function is given by y(t)= ...
*April 16, 2013 by Martin*

**Physics**

A person eats a container of yogurt. The Nutritional Facts label states that it contains 195 Calories (1 Calorie = 4186 J). What mass of perspiration would one have to lose to get rid of this energy? At body temperature, the latent heat of vaporizaiton of water is 2.42 106 J/...
*April 5, 2008 by Jenny*

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