Thursday

July 31, 2014

July 31, 2014

Number of results: 91,217

**MATH**

Aircraft are landing and taking off on parallel runways at a busy airport. On its approach, one aircraft descends from an altitude of 1200m to an altitude of 500m in 35s. During the same time, a departing aircraft climbs from an altitude of 200 m to an altitudes of 1250m. A) ...
*January 5, 2011 by Anonymous*

**math**

triangle ABC has vertices A(3,4), B(4,-3) and C(-4,-1). a. draw a sketch of the triangle b. draw the altitude from vertex A c. find the slope of side BC which is =-1/4 d. find the slope of the altitude from A which is 4 e. find the equation of the line that contains this ...
*October 27, 2010 by Ted*

**math**

an altitude of triangle is 5/3rd of the length of its corresponding base if their altitude be increased by 4cm and the base is decreased by 2cm, the area of the triangles remain the same. find the base and altitude of triangle ?????
*October 7, 2012 by TUHITUHI*

**math**

the length of the base of a triangle is 4 times its altitude. if the area of a triangles is 162cm2 find the altitude
*February 11, 2011 by annette*

**math**

a jetliner is crusing at an altitude of 31,680 ft. What is the altitude in miles? Show work by using demensional analysis.
*October 26, 2010 by Anonymous*

**Calculus**

Wheat is poured on the ground at a rate of 12 ft^3/s. The pile forms a cone whose altitude is always three fourths of the radius. Find the rate at which the altitude is increasing when the altitude is 6.0 ft.
*March 10, 2012 by Candy*

**math**

The base of triangle ABC is one half the altitude.The altitude of triangle DEF is one half its base. If both triangles are equal in area, what is the ratio of the altitude of triangle ABC to the altitude of triangle DEF ? a. 1:4 b. 1:2 c. 1:1 d. 2:1 e. 4:1 please answer and ...
*April 19, 2014 by thomas*

**math**

The base of triangle ABC is one half the altitude. The altitude of triangle DEF is one half its base. If both triangles are equal in area, what is the ratio of the altitude of triangle ABC to the altitude of triangle DEF? a. 1:4 b. 1:2 c. 1:1 d. 2:1 e. 4:1 please answer and ...
*April 24, 2014 by thomas*

**math (geometry)**

A parallelogram has sides 8 and 12. The shorter altitude is 6. Find the length of the other altitude. -------------------------------------------------------------------------------- It says the answer is 9, but I don't know how they got that. Any help is greatly appreciated!! =D
*March 11, 2008 by Emily*

**Physics**

The modern Boeing 747 passenger jet airplane cruises at a speed up to 900 km/hr, at an altitude of 11,000 m. The cabin pressure is maintained equivalent to the atmospheric pressure at an altitude of 2,000 m. This is called the "cabin altitude". The pressure as a function of ...
*January 27, 2013 by Francisco*

**AP Calculus**

The sum of the two bases and the altitude of a trapezoid is 16ft. a) Define the area A of the trapezoid as function of its altitude. b) Find the altitude for which the trapezoid has the largest possible are. (Optimization)
*October 31, 2010 by Anonymous*

**math (altitude)**

An airplane flying at an altitude of 31,000 feet descends at a rate of 1,200 feet per minute. If the plane descends for 15 minutes, what would its altitude be in feet?: * 13,000 23,000 18,000 21,000
*September 22, 2007 by anonymous*

**Math**

the altitude, AD, to the hypotenuse BC of right triangle ABC divides the hypotenuse into segments that are 8 and 10 cm long. find the length of the altitude.
*October 19, 2013 by anae*

**Physics**

A car of mass 1100 kg starts from rest at sea level and climbs a hill of altitude 50 m. At the top of the hill the car has a speed of 25 m/s. From the top of the hill the driver turns off the engine and coasts down to an altitude of 15 m. Assume the friction and the air ...
*October 25, 2012 by Sara*

**Physics**

A car of mass 1100 kg starts from rest at sea level and climbs a hill of altitude 50 m. At the top of the hill the car has a speed of 25 m/s. From the top of the hill the driver turns off the engine and coasts down to an altitude of 15 m. Assume the friction and the air ...
*October 26, 2012 by Sara*

**Physics**

A car of mass 1100 kg starts from rest at sea level and climbs a hill of altitude 50 m. At the top of the hill the car has a speed of 25 m/s. From the top of the hill the driver turns off the engine and coasts down to an altitude of 15 m. Assume the friction and the air ...
*October 27, 2012 by Sara*

**math**

A certain ball is dropped from an altitude of 1 meter and rebounds one-half of it's previous altitude. What is the total distance the ball has traveled when it hits the floor the 40th time?
*September 5, 2013 by Jacob*

**Physics**

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

**physics**

Calculate the value of g for a satellite that is orbiting in a circle at an altitude equal to 3 Earth radii. also, along the same lines, A typical shuttle altitude is 220 km. Calculate the value of g at this altitude. The the mass of the Earth = 5.98 x 10^24 kg and the radius ...
*March 3, 2011 by kelly*

**Math**

The base of tringular field is twice its altitude. If the cost of levelling the field at the rate of Rs 10per m^2 is Rs 4000,find its base and altitude.
*September 9, 2012 by Simran kaur*

**Math**

The area of a triangle varies jointly as its base and altitude. By what percent will the area change if the base is increased by 15% and the altitude decreased by 25%?
*November 22, 2011 by Zoey*

**Math**

The area of a triangle varies jointly as its base and altitude. By what percent will the area change if the base is increased by 15% and the altitude decreased by 25%?
*November 22, 2011 by Jake*

**math**

the rim of a canyon is at an altitude of 45m. On a hike down into the canyon, a party of hikers stop for a rest 160m below the rim. They descend another 71m. What is their new altitude?
*July 5, 2012 by paula jones*

**Geometry altitude**

a(-2,4) b (4,6) c (-4,-4) find the equation for the altitude from each vertex of triangle abc.
*February 14, 2011 by Skye*

**Physics-Gravitational Potential Energy**

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

**Analytic geometry - finding point by intersect lin**

I have a triangle ABC. The slope of AB is -1/ab, the slope of AC is -1/ac, and the slope of BC is -1/ac. My question is, I have 3 lines: Altitude from A to BC, altitude from B to AC, and altitude from C to AB. I know their slope because it is just -1/slope. But I want to know ...
*March 5, 2013 by Knights*

**physics**

how would you calculate altitude given airspeed, rate of descent and time? I'm trying to find the change in altitude
*September 20, 2010 by polly*

**physics**

A model rocket leaves the ground, heading straight up at 47 m/s. (a) What is its maximum altitude? m What are its speed and altitude at each of the following times? (b) 1 s m/s m (c) 4 s m/s m (d) 8 s m/s m
*January 16, 2011 by Jen*

**geometry**

The altitude upon the hypotenuse of a right triangle divides the hypotnuse into segments of 3 and 12. find the length of the altitude
*February 8, 2011 by Jorge*

**Geography **

How do latitude and altitude affect the climate? My answer: The altitude affects the climate in the sense that the higher the altitude, the colder and harsher the climate will become. Latitude affecting the climate, however, depends on the equator. The closer the latitude is ...
*September 2, 2013 by Anonymous*

**math**

The atmospheric pressure P in pounds per square inch (psi) is given by P = 14.7 e^−0.21 a where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 11.35 psi, what is its altitude?
*November 14, 2013 by Anonymous*

**Math**

The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 4500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 9000 centimeters and the area is 87000...
*August 23, 2011 by Ning*

**Math Homework**

1) Given the side of a square pyramid is 6cm and the altitude is 4cm calculate the surface area. 2) Given the side of a square pyramid is 12cm and the altitude is 8cm calculate the surface area. 3) Given the side of a square pyramid is 18cm and the altitude is 12cm calculate ...
*February 6, 2007 by Student*

**math**

The atmospheric pressure P in pounds per square inch (psi) is given by the formula below, where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 13.25 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your answer to the ...
*October 20, 2011 by Anonymous*

**math**

The atmospheric pressure P in pounds per square inch (psi) is given by the formula below, where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 13.25 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your answer to the ...
*January 22, 2012 by Anonymous*

**calc**

2- The earth’s atmospheric pressure p is often modeled by assuming that the rate dpdhat Which p changes with the altitude above sea level is proportional to hp. Suppose that the pressure at sea level is 1013 millibars (about 14.7 pounds per square inch) and that the pressure ...
*April 10, 2007 by barb*

**college math**

The atmospheric pressure P in pounds per square inch (psi) is given by the formula below, where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 13.25 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your answer to the ...
*July 10, 2011 by joyce*

**math/geometry**

What are the surface areas of this two figures? a) a triangular pyramid with base of 5 cm, an altitude of the base of 8.7 cm and a slant height = 6.9 cm b) a square pyramid with a slant height of 5.2cm and an altitude of the triangle of 9cm.
*November 11, 2008 by katie*

**Algebra Honors**

The length of the base of a triangle is 4 times its altitude. If the area the triangle is 162 cm2, find the altitude.
*April 2, 2009 by Raj*

**geometry**

the base of a triangle is 4dm longer than its altitude, and its area is16dm^2. Find the lengths of the base and its altitude.
*February 6, 2011 by ja*

**Geometry**

The altitude of the hypotenuse of a right triangle divides the hypotenuse into segments of lengths 14 and 8. What is the length of the altitude?
*February 21, 2012 by Myles*

**Trigonometry **

Your altitude is 40,000 feet and you detect a target at a depression angle of 6 degrees and a range of 20 miles. what is the altitude of the target? Draw a picture.
*March 11, 2012 by Diana*

**Geometry**

Using vectors, show that the centroid of a regular pyramid with a rectangular base lies on the altitude to the base and is 4/5 of the altitude's length from the vertex.
*December 3, 2012 by Delia*

**geomerty HELP PLEASE!**

Using vectors, show that the centroid of a regular pyramid with a rectangular base lies on the altitude to the base and is 4/5 of the altitude's length from the vertex.
*December 4, 2012 by Delia*

**Math**

A lot is in the shape of a trapezoid. The sum of the bases is 180 feet. If the area of the lot is 8,100 square feet, what is the distance across the lot, i.e. the altitude of the figure? The altitude of the trapezoid is __ feet.
*April 25, 2013 by Joe*

**College Math II**

If a ball is tossed into the air from a height of 6 feet with a velocity of 32 feet per second, then its altitude at time t (in seconds) can be described by the function A(t) = - 16t^2 + 32t + 6. Find the altitude of the ball at 2 seconds. I am having problems understanding ...
*November 21, 2009 by Lori*

**Math (Proportions)**

3. The ratio of the altitude of a triangle to the length of its base is 5:12. Calculate the altitude if the length of the base is 42mm. 17.5 length/base= 5/12=x/42= 17.5
*October 18, 2013 by Jerald*

**math (algebra)**

Water boils at 212 degrees F at sea level (altitude 0 ft), 204.6 degrees F at 40000 ft, 197.2 deg. F at 8000 ft, and 189.8 deg. F at 12,000 ft. Find a good model relating the boiling temperature t of water to the altitude a.Is the model linear or quadratic?
*May 3, 2009 by Layne*

**physics**

In late 2001, steve Fossett tried to fly a balloon nonstop around the world . why on his attempted circumnavigation of the globe did Steve attempted to travel at an altitude of approximately 10000 m? That is a typical stratosphere flight altitude, where the pilot can usually ...
*June 16, 2007 by Emma*

**math**

Atmospheric pressure V decreases as altitude h increases. At a temperature of the pressure is 101.1kilopascals kPa at sea level, 86.4 kPa at h = 1 km, and 77.1 kPa at h = 2 km. Use a linear approximation to estimate the atmospheric pressure at an altitude of 3 km. Please round...
*March 30, 2007 by Tina*

**help physics**

A satellite, LangSat, moves in circular orbit around the Earth at a speed of 4.95kms-1. (i) What is the altitude of the satellite (ii) Determine the period of the satellite’s orbit (iii) What is the value of the gravity, g, at the satellite. (iv) If another satellite, DukuSat...
*September 2, 2013 by kent*

**physics**

A child loses his balloon, which rises slowly into the sky. a) If the balloon is 21.5 cm in diameter when the child loses it, what is its diameter at an altitude of 1150 m? Assume that the balloon is very flexible and so surface tension can be neglected. b) And what is the ...
*March 21, 2012 by maria*

**physics**

The largest ballon ever flown had a volume of 53 million cubic feet. The thickness of the fabric is only 0.013mm. The balloon would reach an altitude of 150,000 ft. ( 46 km). The atmospheric pressure at that altitude is about 2*10^-3kg/m^3. The pressure of the helium was the ...
*January 1, 2014 by alice*

**Phizzics....**

The Canadian microsatellite MOST (Microvariability and Oscillations of Stars) has a mass of just 52 kg. It travels in an almost circular orbit at an average altitude of 820 km above Earth’s surface. a) Calculate the gravitational force between Earth and the MOST satellite at ...
*May 15, 2012 by dreamygirl*

**Math**

The area of trapezoid is h( b1+b2)/5, where h is the altitude, and b1 and b2 are the lenghts of the parallel bases. If trapezoid has an altitude of 5 inches, an area of 55 square inches , and one base 12 inches long, what is the lenghth, in inches, of its other base? Please ...
*April 22, 2011 by Nena*

**11th grade**

Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 236 miles and a perigee of 215 miles above the surface of Earth. Use the rule of thumb that below an altitude ...
*December 16, 2010 by Vanessa*

**math**

The area of trapezoid is h( b1+b2)/5,where h is the altitude, and b1 and b2 are the lenghts of the parallel bases. If trapezoid has an altitude of 5 inches, an area of 55 square inches , and one base 12 inches long, what is the length, in inches, of its other base?
*April 20, 2011 by Please help*

**math**

The area of trapezoid is h( b1+b2)/5,where h is the altitude, and b1 and b2 are the lenghts of the parallel bases. If trapezoid has an altitude of 5 inches, an area of 55 square inches , and one base 12 inches long, what is the length, in inches, of its other base?
*April 20, 2011 by Please help*

**chemistry**

At an altitude of 50.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude?
*April 12, 2010 by Laura*

**chemistry**

At an altitude of 50.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude?
*April 12, 2010 by Laura*

**Chemistry**

At an altitude of 50.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude?
*April 13, 2010 by Anonymous*

**Math-please help! **

the area of the base of a triangular prisim A is 15 square inches and its altitude is 8 inches. Rectangular prism B has a square base that measures 2 inches on each side. If prisim A and prisim B have the same volumes, what must be the altitude of prisim b?
*April 12, 2010 by Lena*

**physics**

A spacecraft is in circular Earth orbit at 5400km altitude. By how much will its altitude decrease if it moves to a new circular orbit where its orbital speed is 20% higher?
*November 10, 2013 by Judith*

**algebra**

The length of an altitude of a triangle is 1/3 the length of the side to which it is drawn. If the area is 6 square cm., then what is the length of the altitude?
*January 6, 2011 by Tammy*

**chemistry**

A high-altitude balloon contains 97.5 L of helium gas at 95.8 kPa. What is the volume when the balloon rises to an altitude where the pressure is only 21.5 kPa? (Assume that the temperature remains constant.)
*March 2, 2011 by lisa*

**Algebra II**

The area of a triangle varies jointly as its base and altitude. By what percent will the area change if the base is increased by 15% and the altitude decreased by 25%?
*November 21, 2011 by Ashley*

**Algebra II**

The area of a triangle varies jointly as its base and altitude. By what percent will the area change if the base is increased by 15% and the altitude decreased by 25%?
*November 22, 2011 by Jake*

**Algebra II**

The area of a triangle varies jointly as its base and altitude. By what percent will the area change if the base is increased by 15% and the altitude decreased by 25%?
*November 22, 2011 by Jake*

**Math**

A plane was flying at an altitude of 30,000 feet when it began the descent toward the airport. The airplane descends at a rate of 850 feet per minute. a. What is the function rule that describes this situation? b. What is the altitude of the plane after it has descended for 8 ...
*January 12, 2014 by Shakira*

**physics**

A 981-kg satellite orbits the Earth at a constant altitude of 103-km. How much energy must be added to the system to move the satellite into a circular orbit with altitude 199 km? I need answer in MJ please tell me what formula
*March 11, 2011 by Rachel*

**CAL**

The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 4000 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 11500 centimeters and the area is ...
*July 9, 2011 by Laura Le*

**CAL**

The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 4000 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 11500 centimeters and the area is ...
*July 10, 2011 by lan*

**Calculus Please help!**

The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 3500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 7000 centimeters and the area is 87000...
*February 28, 2014 by ALI*

**physics...**

A satellite moves in a circular orbit around the Earth at a speed of 5661 m/s. (a) Determine the satellite's altitude above the surface of the Earth. i'm using the equation Gm/(r+h)=9.8 where h=altitude and i keep coming up with the wrong answer.
*December 8, 2010 by kaitlyn*

**calculus**

The altitude of a triangle is increasing at a rate of 3.000 centimeters/minute while the area of the triangle is increasing at a rate of 2.500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 9.000 centimeters and the area is 93...
*May 14, 2012 by remy*

**Calculus**

The rate of change R, in kilometers per hour, of the altitude of a hot air balloon is given by R(t)=t^3-4t^2+6 for time on the interval [0,4], where t is measured in hours. Assume the balloon is on ground level. What is the maximum altitude of the balloon during the interval [...
*January 10, 2011 by Joe Schmo*

**Physics**

A cup of coffee is sitting in an airplane flying at constant speed and altitude. Mu between cup and table is .36. The plane accelerates, maintaining constant altitude. What is the maximum acceleration that the plan can have without the cup sliding backwards?
*September 18, 2007 by Anonymous*

**algebra**

The atmospheric pressure P in pounds per square inch (psi) is given by P = 14.7 e^−0.21 a where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 12.17 psi, what is its altitude?
*November 11, 2013 by lisa*

**geometry**

two triangular roofs are similar. The ratio of the corresponding sides of these roofs is 2:3. If the altitude of the smaller roof is 4.5 feet, find the corresponding altitude of the larger roof. Round to the nearest hundredth. A. 7.5 B. 6.75 C. 6 D. 4
*September 17, 2010 by ashley*

**phys science**

A space shuttle orbits at an altitude of approximately 200km above the surface of the Earth. If the radius of the Earth itself is 6380 km, what’s the acceleration due to gravity at the altitude of the space shuttle?
*July 18, 2011 by josh*

**geometery**

A solid metal cylinder with a 4-in. radius and a 10-in. altitude is melted and recast into solid right circular cones each with a 1-in. radius and a 2-in. altitude. The number of cones formed is
*December 15, 2012 by Anonymous*

**proportional relationship**

An airplane is flying at an altitude of 4000 feet and descends at a rate of 200 feet per min. Determine whether the altitude is proportional to the # of min.
*February 4, 2014 by Regan*

**phys sci**

the space shuttle orbits at an altitude of approximately 200 km above the surface of the earth. If the radius of the earth itself is 6380km, what is the acceleration due to gravity at the altitude ofthe space shuttle?
*July 19, 2011 by king*

**physics**

The tropospheric lapse rate (the rate at which temperature decreases with altitude) is approximately 6°C per kilometer. Given that the mean surface temperature of Earth is 288 K and the effective radiating temperature is 255K, from what altitude does most of the emitted ...
*October 22, 2011 by Set6*

**physics**

A 470-kg satellite experiences a gravitational force of 850 N. Use M_{Earth} = 5.972 x 10^{24} kilograms and r_{Earth} = 6370 kilometers What is the radius of the satellite�s orbit? r_{orbit} = _____________kilometers What is its altitude? altitude = ...
*March 3, 2014 by Melissa*

**Phys Science**

Good afternoon tutors..I need help on a few problems.Im really stuck.. 1) the space shuttle orbits at an altitude of approximately 200km above the surface of the earth. If the radius of the earth itself is 6380km, whats the acceleration de to gravity at the altitude of the ...
*July 19, 2011 by 45843*

**Physics Help**

A hot air balloon starts at its launching station and it goes at a horizontal speed of 2.7 m/s and a vertical wind of 1.1 m/s. Once it reaches an altitude of 202 m, it stays at that altitude for 10.3 s, which is when it drops a sandbag. How far will the sandbag land from the ...
*November 8, 2010 by Kourt*

**Physics Help**

A hot air balloon starts at its launching station and it goes at a horizontal speed of 2.7 m/s and a vertical wind of 1.1 m/s. Once it reaches an altitude of 202 m, it stays at that altitude for 10.3 s, which is when it drops a sandbag. How far will the sandbag land from the ...
*November 8, 2010 by Kourt*

**Physics**

A hot air balloon starts at its launching station and it goes at a horizontal speed of 2.7 m/s and a vertical wind of 1.1 m/s. Once it reaches an altitude of 202 m, it stays at that altitude for 10.3 s, which is when it drops a sandbag. How far will the sandbag land from the ...
*November 9, 2010 by Ashley*

**Math - Pleeeease**

Two planes take off at a ny airport. The first plane climbs at an angle of 45 degrees with respect to the ground and reaches an altitude of 5600 feet. The second plane climbs at an angle of 60 degress with respect to the ground and reaches an altitude of 8200 feet. To the ...
*May 8, 2014 by andra*

**Physics. Please Help!!!**

A hot air balloon starts at its launching station and it goes at a horizontal speed of 2.7 m/s and a vertical wind of 1.1 m/s. Once it reaches an altitude of 202 m, it stays at that altitude for 10.3 s, which is when it drops a sandbag. How far will the sandbag land from the ...
*November 8, 2010 by Kourt*

**Physics. Please Help!!**

A hot air balloon starts at its launching station and it goes at a horizontal speed of 2.7 m/s and a vertical wind of 1.1 m/s. Once it reaches an altitude of 202 m, it stays at that altitude for 10.3 s, which is when it drops a sandbag. How far will the sandbag land from the ...
*November 9, 2010 by Kourt*

**algebra**

The atmospheric pressure P in pounds per square inch (psi) is given by P = 14.7 e−0.21 a where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 12.21 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your answer to the ...
*May 23, 2014 by tasha*

**altitude triangle inequality**

hi guys ive be struggling on this problem for a couple of days, so please help if you can Problem:Two altitudes of a triangle have lengths 12 and 14. What is the longest possible length of the third altitude, if it is a positive integer? Thanks in advance and merry christmas: ...
*December 31, 2012 by Knights*

**earth science**

if the base of a clound is located at an altitude of 2 kilometers and the top of the clound is located at an altitude of 8 kilometrs, is the clound located in the: troposhere statosphere or mesosphere
*May 28, 2008 by lea williams*

**physics**

Helium balloons are used regularly in scientific research. A typical balloon would reach an altitude of 45.0 km with an air density of 4.3×10−3 kg/m3. At this altitude the helium in the balloon would expand to 540000.0 m3. Take g=10 m/s2. Find the buoyant force on the ...
*December 14, 2013 by Anonymous*

**AP Chemistry**

A 2.50 L balloon is filled with helium gas at sea level, 1.00 atm and 32 degrees celsius. The balloon is released and it rises to an altitude of 30,000 ft. If the pressure at this altitude is 228 mm Hg and the temperature is -44 degrees celsius, what is the volume of the balloon?
*November 1, 2012 by Katie*

**Physics**

Helium balloons are used regularly in scientific research. A typical balloon would reach an altitude of 40.0 km with an air density of 4.3*10^-3 kg/m^3. At this altitude the helium in the balloon would expand to 540000.0m^3. Find the buoyant force on the balloon.
*December 24, 2013 by Hil*

**Geometry- how to write proof**

ABC is a right triangle. Angle C is 90 degree. Altitude CD is drawn to hypotenuse AB. Prove AB/BC = BC/BD and AB/AC = AC/AD This is a theorem. How do I prove it? Thanks. Dont you have similar triangles? You can show this by looking at the angles involved...remember the ...
*February 23, 2007 by Jen*

**Physics please help**

Geosynchronous satellites orbit the Earth at an altitude of about 3.58×10^7 m. Given that the Earth's radius is 6.38×10^6 m and its mass is 5.97×10^24 kg, what is the magnitude of the gravitational acceleration at the altitude of one of these satellites? Please explain as well...
*June 9, 2012 by Kevin*

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