Sunday

November 29, 2015
Number of results: 45,213

**Physics**

A radar station locates a sinking ship at range 16.0 km and bearing 136° clockwise from north. From the same station, a rescue plane is at horizontal range 19.6 km, 155° clockwise from north, with elevation 2.35 km.
*September 6, 2015 by C*

**MATH**

A plane flying with a constant speed of 24 km/min passes over a ground radar station at an altitude of 4 km and climbs at an angle of 45 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 2 minutes later? Rate = km/min The vertical...
*March 6, 2007 by Jia*

**CALCULUS **

A plane, flying horizontally at an altitude of 1 km and a speed of 500 km/hr, passes directly over a radar station. find the rate in km/hr at which the distance from the plane to the station is changing when it is 2 km away from the radar station. Hint: this is not a max/min ...
*April 24, 2014 by TANYA*

**calculus**

A plane flying horizontally at an altitude of 1 mi and a speed of 500 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station. I drew a diagram and figured out I need to ...
*March 4, 2012 by Daniel*

**Trigonometry**

Two radar stations are 50 miles apart. Both are tracking the same plane. At this moment, the angle between station 1 and the plane is 73 degrees and the angle between station 2 and the plane is 46 degrees. How far is the plane from station 2?
*May 6, 2014 by Ryan*

**calculus**

a plane flying horizontally at an altitude of 2 mi and a speed of 460 mi/h passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 5 mi away from the station.
*November 17, 2011 by L.J*

**Calculus**

A plane flying horizontally at an altitude of 2 mi and a speed of 420 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 5 mi away from the station.
*October 13, 2015 by Callie*

**Calc**

A plane flying horizontally at an altitude of 2 mi and a speed of 420 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 5 mi away from the station.
*October 13, 2015 by Callie*

**PRECALCULUS**

An airplane is flying at a speed of 250 mph at an altitude of 4 miles. The plane passes directly above a radar station at time t=0. Find the distance s between the plane and the radar station after 5 minutes.
*May 27, 2011 by OSCAR*

**Pre-Calc**

An airplane is flying at a speed of 250 mph at an altitude of 4 miles. The plane passes directly above a radar station at time t = 0. What is the distance s between the plane and the radar station after four minutes?
*September 20, 2015 by Sam*

**Calc**

A plane flying horizontally at an altitude of 1 mi and a speed of 510 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 6 mi away from the station. (Round to the nearest whole number.)
*November 8, 2009 by Peter*

**Cal**

A plane flying horizontally at an altitude of 3 mi and a speed of 480 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 6 mi away from the station. (Round to the nearest whole number.)
*November 11, 2010 by Jordan*

**math cal**

A plane flying horizontally at an altitude of 3 mi and a speed of 480 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 6 mi away from the station. (Round to the nearest whole number.)
*November 17, 2010 by anna*

**calculus**

A plane flying horizontally at an altitude of 1 mi and a speed of 560 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station. (Round your answer to the nearest whole number.)
*October 2, 2012 by Anonymous*

**Physics**

Consider a piece of metal that is at 5 deg C. If it is heated until it has twice the internal energy, its temperature will be. a)556 deg C b)283 deg C c)273 deg C d)278 deg C e)10 deg C
*November 19, 2012 by S*

**Calc**

How do I do this related rates problem? A plane flying horizontally at an altitude of 1 mi and a speed of 510 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 6 mi away from the station. (...
*November 10, 2009 by Derick*

**calculus**

A plane flying with a constant speed of 23 km/min passes over a ground radar station at an altitude of 5 km and climbs at an angle of 35 degrees. At what rate, in km/min is the distance from the plane to the radar station increasing 7 minutes later?
*February 25, 2010 by angel*

**Calculus**

A plane flying with a constant speed of 24 km/min passes over a ground radar station at an altitude of 8 km and climbs at an angle of 20 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 2 minutes later?
*March 1, 2010 by Danny*

**math**

A plane flying with a constant speed of 14 km/min passes over a ground radar station at an altitude of 7 km and climbs at an angle of 35 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 5 minutes later?
*May 24, 2011 by Alexandra*

**Calculus**

A plane flying with a constant speed of 4 km/min passes over a ground radar station at an altitude of 5 km and climbs at an angle of 45 degrees. At what rate, in km/min is the distance from the plane to the radar station increasing 4 minutes later?
*October 7, 2011 by Anonymous*

**math**

a cb radio station c is located 3 mi from the interstate highway h. the station has a range of 6.1 mi in all directions from the station. if the interstate is along a straight line, how many miles of highway are in the range of this staion?
*May 15, 2012 by jay*

**Calculus**

Someone had helped me yesterday, but I need it broken down more because I honestly don't understand any of this? A plane flying horizontally at an altitude of 2 mi and a speed of 420 mi/h passes directly over a radar station. Find the rate at which the distance from the plane ...
*October 14, 2015 by Callie*

**Calc**

An airplane is flying at a speed of 350 mi/h at an altitude of one mile and passes directly over a radar station at time t=0. a) Express the horizontal distance d (in miles) that the plane has flown as a function of t. I really don't know... would it be something like d= t . a...
*October 5, 2015 by Justin*

**Cosine Law**

For the next three questions, choose which is the most appropriate method to solve the problem, explain your answer. a) SOACAHTOA b) The Sine Law c) The Cosine Law d) The problem cannot be solved without further information 1) Yachts in a race have to sail a triangular course...
*May 25, 2014 by Jane*

**calculus**

shortly after taking off, a plane is climbing at an angle of 30° and traveling at a constant speed of 640 ft/sec as it passes over a ground radar tracking station. At that instant of time, the altitude of the plane is 1000 ft. How fast is the distance between the plane and the...
*October 18, 2011 by Anonymous*

**Cosine Law NEED HELP QUCIK**

For the next three questions, choose which is the most appropriate method to solve the problem, explain your answer. a) SOACAHTOA b) The Sine Law c) The Cosine Law d) The problem cannot be solved without further information 1) Yachts in a race have to sail a triangular course...
*May 27, 2014 by Jane*

**pre cal**

An airplane is flying at a speed of 350 mi/h at an altitude of one mile. The plane passes directly above a radar station at time t 0. (a) Express the distance s (in miles) between the plane and the radar station as a function of the horizontal distance d (in miles) that the ...
*May 1, 2014 by Danielle*

**calculas**

A plane flying with a constant speed of 19 km/min passes over a ground radar station at an altitude of 4 km and climbs at an angle of 25 degrees. At what rate is the distance from the plane to the radar station increasing 3 minutes later? The distance is increasing at
*October 26, 2013 by Anonymous*

**calculus**

A drone aeroplane is flying horizontally to a constant height of 4000 ft above a fixed radar tracking station. At a certain instant the angle of elevation theta is 30 degrees and decreasing, and the speed of the aeroplane is 300 mi/h a) How fast is theta decreasing at this ...
*April 24, 2012 by Paige*

**Calculus**

At a given moment, a plane passes directly above a radar station at an altitude of 7 miles. (a) If the plane's speed is 400 mph, how fast is the distance between the plane and the station changing half an hour later? (b) How fast is the distance between the plane and the ...
*November 4, 2012 by Anna*

**Geometry**

What is the value of x? image is on: tiny pic . com/r/nx1abn/8 I choose c 90 deg a 60 deg b 72 deg c 90 deg d 120 deg
*June 23, 2014 by Geo*

**Calc**

An airplane is flying at a speed of 350 mi/h at an altitude of one mile and passes directly over a radar station at time t=0. a) Express the horizontal distance d (in miles) that the plane has flown as a function of t. I really don't know... would it be something like d= t . a...
*September 19, 2010 by Chelsea*

**Calculus**

A plane flying with a constant speed of 5 km/min passes over a ground radar station at an altitude of 4 km and climbs at an angle of 35 degrees. At what rate, in km/min is the distance from the plane to the radar station increasing 10 minutes later? I got it down to [250-20cos...
*September 25, 2009 by Z32*

**Calculus**

An airplane is flying at a speed of 350 mi/h at an altitude of one mile and passes directly over a radar station at time t=0. a) Express the horizontal distance d (in miles) that the plane has flown as a function of t. b) Express the distance s between the plane and the radar ...
*September 21, 2010 by Chelsea*

**physics**

A space station Radar locates sattelites A and B at a certain moment: A_0=(a_1,0,1^3), B_0=(0,b_2,b_3) the space station is located at (0,0,0) and the sattelites moves with a uniform velocity related to the space station: v_A=(V_A,0,0), v_B=(V_B,V_B,0) what is the minimal ...
*November 2, 2014 by Adam*

**Physics **

A plane flies towards a ground-based radar dish. Radar locates the plane at a distance D = 41 km from the dish, at an angle θ = 52° above horizontal. What is the plane’s horizontal distance, DH in meters, from the radar dish??
*September 11, 2014 by Lauren HELP *

**Calc**

A plane that is flying horizontally at an altitude of 6 kilometers and a speed of 680 kilometers per hour passes directly over a radar station. How fast is the distance between the plane and the radar station increasing when the distance between the two is 9 kilometers
*October 20, 2009 by Georgia*

**calculus**

A plane that is flying horizontally at an altitude of 6 kilometers and a speed of 570 kilometers per hour passes directly over a radar station. How fast is the distance between the plane and the radar station increasing when the distance between the two is 14 kilometers
*October 28, 2013 by Matr*

**physics**

Consider four vectors F1, F2, F3, and F4, with magnitudes are F1 = 41 N, F2 = 24 N, F3 =27 N, and F4 = 51 N, and angle 1 = 150 deg, angle 2 = −160 deg, angle 3 = 39 deg, and angle 4 = −57 deg, measured from the positive x axis with the counter clockwise angular ...
*February 16, 2011 by anonymous*

**physics**

A container of hot water at 80 deg C cools to 79 deg C in 15 seconds when it is placed in a room that is at 20 deg C. Use Newton's law of cooling to estimate the time it will take for the container to cool from 70 deg C to 69 deg C.
*October 19, 2011 by Dave*

**physics**

A container of hot water at 80 deg C cools to 79 deg C in 15 seconds when it is placed in a room that is at 20 deg C. Use Newtons law of cooling to estimate the time it will take for the container to cool from 70 deg C to 69 deg C.
*October 19, 2011 by Dave*

**Airplane & Radar**

(Airplane & Radar) An airplane is flying (horizontally) at the height of 6 km on a flight path that will take it directly over a radar tracking station (on ground). If the distance D between the plane and the radar is decreasing at a rate of 300 km/hr, find the speed of the ...
*December 15, 2011 by math*

**Phys 2**

I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North 50 deg below due ...
*March 16, 2011 by Sonia*

**Physics**

I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North 50 deg below due ...
*March 16, 2011 by Sonia*

**Please Please Help-Physics**

I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North 50 deg below due ...
*March 16, 2011 by Sonia*

**physics**

A plane is found by radar to be flying 5.9 km above the ground. The angle of elevation from the radar to the plane is 78.6°. Ten seconds later, the plane is directly over the station. Find the speed of the plane, assuming that it is flying level.
*March 13, 2014 by eric*

**Math**

A ship sailing west toward shore, and there are tow ports on the horizon. The ports are 17 miles apart, and from the ship's vantage point, point A is 30 deg North of straight ahead and port B is 80 deg South of straight ahead. Approximately how much farther is it fro the ship ...
*March 4, 2015 by elmemo*

**MATH**

A plane flying with a constant speed of 24 km/min passes over a ground radar station at an altitude of 5km and climbs at an angle of 35 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 4 minutes later? You should draw out a ...
*March 8, 2007 by jimmy*

**Caculas**

(Airplane & Radar) An airplane is flying (horizontally) at the height of 6 km on a flight path that will take it directly over a radar tracking station (on ground). If the distance D between the plane and the radar is decreasing at a rate of 300 km/hr, find the speed of the ...
*December 16, 2011 by matthew*

**trig**

a ship has maintained a bearing of 47 degrees. ( a bearing is the angle measured clockwise from due north) a) how far has the ship sailed if it is 200 miles north of its original position? b) how far east of its original position is the ship? c) if the ship's average speed is ...
*October 5, 2008 by jerson*

**Calculus test tomorrow**

A plane flying with a constant speed of 24 km/min passes over a ground radar station at an altitude of 5km and climbs at an angle of 35 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 4 minutes later? I know side A=5 but how do ...
*March 8, 2007 by jimmy*

**trig**

Two tracking stations are on the equator 134 miles apart. A weather balloon is located on a bearing of N 38°E from the western station and on a bearing of N 19°E from the eastern station. How far is the balloon from the western station? Round to the nearest mile.
*March 28, 2012 by Anonymous*

**Pre Cal**

Two tracking stations are on the equator 158 miles apart. A weather balloon is located on a bearing of N 41degrees E from the western station and on a bearing of N 21degrees E from the eastern station. How far is the balloon from the western station.
*April 9, 2012 by Kara*

**Trig**

Two tracking stations are on the equator 161 miles apart. A weather balloon is located on a bearing of N 32°E from the western station and on a bearing of N 16°E from the eastern station. How far is the balloon from the western station? Round to the nearest mile.
*November 19, 2014 by Nicole*

**trigonomentry**

Ada travels from A on a bearing of 60˚ to station B on a distance of 15km.she then leaves to station C 10km away from B due east of station
*March 2, 2014 by anna*

**pre-cal**

Find the EXACT VALUE of csc(-11pi/12) If that angle is in radians, it is easy. A full circle has 2PI radians...or 360 deg so 22PI/24 is the same as 22*15 deg, or -30 deg. The 30 deg triangle is well known. The sin is 1/2, so the csc is 2 Figure out the sign of the csc from ...
*May 16, 2007 by ethan*

**bearing and distance**

Two vehicles p and q leave a station at the same time.p travels 8km/hour on a bearing of 025 degree and q 5km/hour on a bearing of 45 degree west of north.how far apart are they and what is the bearing of p from q after 3hours?
*June 14, 2014 by mary*

**Grade 11 math**

A rocket carrying a weather satellite is launched. As it moves through space, the rocket is tracked by two tracking stations located 24 km. apart, beneath the rocket. The 2 tracking stations both lie west of the launching pad. at a specific moment, the rocket's angle of ...
*April 28, 2011 by Mhy*

**trig pls.. help me**

A rocket carrying a weather satellite is launched. As it moves through space, the rocket is tracked by two tracking stations located 24 km. apart, beneath the rocket. The 2 tracking stations both lie west of the launching pad. at a specific moment, the rocket's angle of ...
*May 2, 2011 by Mhy*

**trig**

Two tracking stations are on the equator 135 miles apart. A weather balloon is located on a bearing of N 37 degrees E from the weastern station and on a bearing of N 19 degrees E from the eastern station. How far is the balloon from the weastern station?
*April 21, 2013 by Taylor*

**physics**

A train starts from station A at 1pm and reaches station B at 3 pm, aftet travelling 108 km. It halts at station B for one hour and then starts for station c which is 42 km fron station B. It reaches station c at 7pm on the same day. The avg speed fo the train for the whole ...
*August 19, 2014 by karan*

**Math**

A lighthouse is east of a Coast Guard patrol boat. The Coast Guard station is 20 km north of the lighthouse. The radar officer aboard the boat measures the angle between the lighthouse and the station to be 23°. How far is the boat from the station?
*May 8, 2013 by Grace*

**Pre-Calculus**

A 15N force acting at 15 degrees north of east and a 18N force acting at 79 degrees north of west act concurrently on an object. What is the magnitude and direction of a third force that produces equilibrium on the object? Show sketch and work. ------ x-component:: 15*cos(15 ...
*March 3, 2014 by Alexis*

**Physics**

A ship fires its guns with a speed of 400 m/s at an angle of 35 with the horizontal. a. Find the range and maximum altitude. b. If the ship hits a plane that was 12 km away, how high was the plane flying?
*November 6, 2015 by Anonymous*

**physics**

1.)A radio station transmits waves of length 400m.if the speed of the waves is 3*10power8m/sec,find the frequency of the radio station. 2.)Audible range of frequencies is between 20Hz and 20KHz.Find the range of the wavelengths corresponding to these frequencies.given,velocity...
*May 18, 2012 by srikar*

**C Programming**

How do you reprompt after the user inputs a wrong number into the program in C Programming? Loop structure? i.e. I want my code to do this: Enter a Compass Heading: 500.7 Please Input a Compass Heading between 0 and 360 Degrees. Enter a Compass Heading: 360.0 If the user puts ...
*September 30, 2009 by gnozahs*

**Heat Transfer**

A fin 30 cm long & 10mm diameters throughout is made of steel alloy of thermal conductivity 43 W/m-deg. the fin attached to a plane heated wall at 200 deg.C temp. extends into surroundings at 25 deg.C.& Unit surface conductance of 120W/m^2-deg. Workout the heat flow rate from ...
*August 1, 2012 by Rafeeq*

**Heat Transfer**

A fin 30 cm long & 10mm diameters throughout is made of steel alloy of thermal conductivity 43 W/m-deg. the fin attached to a plane heated wall at 200 deg.C temp. extends into surroundings at 25 deg.C.& Unit surface conductance of 120W/m^2-deg. Workout the heat flow rate from ...
*August 1, 2012 by Guru*

**Physics**

I need to sketch a 45 deg - 45 deg - 90 deg triangle and indicate the lengths of each side assuming the hypotenuse is = to 1 meter
*February 19, 2010 by Lisa*

**Chemistry**

What is the final temperature when 50.0 g of Chromium at 15 deg. C (specific heat of Cr = 0.107 cal/g-deg.) is added to 25 ml of 45 deg.C water?
*February 23, 2010 by Mary*

**Algebra 1**

In a right triangle the adjacent side = 12, the opposite side = 35, and the hypotenuse = 37. What does the opposite angle =? a-71,1 deg b-18.9 deg c-29.2 deg d-90 deg my answer is 18.89 degrees
*April 13, 2015 by Steve*

**Calculus**

A plane flying with a constant speed of 14 km/min passes over a ground radar station at an altitude of 7 km and climbs at an angle of 45 degrees. At what rate, in km/min is the distance from the plane to the radar station increasing 2 minutes later? I know you use law of ...
*October 14, 2006 by Michael*

**Trig.**

I have answers for these problems, but I wanted to check if I had them right because I wasnt sure on some of them....Thanks. Solve the triangle: 1. a=4, b=8, alpha=30 deg. answer- beta=90 deg., gamma=60 deg., c=7 2. a=5, b=7, alpha=30 deg. answer- beta=44 deg., gamma=106 deg...
*December 12, 2006 by ashley*

**physics**

A small steel ball bearing with a mass of 28.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.25 m. Calculate the horizontal distance the ball would travel if the same spring were aimed 34.0 deg ...
*September 12, 2010 by Emily*

**physics**

A small steel ball bearing with a mass of 28.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.25 m. Calculate the horizontal distance the ball would travel if the same spring were aimed 34.0 deg ...
*September 12, 2010 by Emily*

**Physics**

The lion first runs 200 yards at 20 deg. south of west, then 300 yards at 40 deg. west of north, and finally 400 yards at 10 deg east of north at which point it catches up to the deer. How far from the starting point, and in what direction is the point where the lion and the ...
*October 8, 2014 by Ana*

**Physics please help im DESPERATE **

A small steel ball bearing with a mass of 17.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.23 m. Calculate the horizontal distance the ball would travel if the same spring were aimed 39.0 deg ...
*February 8, 2013 by Robert *

**physics **

The lion first runs 200 yards at 20 deg. south of west, then 300 yards at 40 deg. west of north, and finally 400 yards at 10 deg east of north at which point it catches up to the deer. How far from the starting point, and in what direction is the point where the lion and the ...
*October 8, 2014 by Anonymous*

**Math**

A distressed ship is 10 miles south and 8 miles east of a coast guard station. a) What bearing should the coast guard boat take to reach the distressed ship? b)How many miles will the coast guard boat travel? c)If the coast guard boat is traveling 30 miles per hour, how long ...
*January 6, 2015 by Andrew*

**Physics**

A police radar has an effective range of 1.0 km, and a motorist's radar detector has a range of 1.9 km. The motorist is going 100km/h in a 80km/h zone when the radar detector beeps. At what rate must the motorist decelerate to avoid a speeding ticket?
*September 6, 2013 by Amber*

**Pre-Calculus**

Two barges are pulling a ship into the harbor. Barge A is pulling with a force of 2700N at N43 deg E, and barge B is pulling at S 50 deg E. What force must barge B exert so that the ship is pulled directly East?
*May 2, 2011 by Joe*

**Trigonometry**

A ship is passing thru the island of corregidor. At its closest point of approach radar determine that it is 2,400 m away. Later the radar determines that it is 2,650 m away . a.)By what angle did the ship's bearing from corregidor change ? b.)How far did the ship travel but ...
*December 3, 2012 by Lelouch*

**PHYSICS HELP 3RD REQUEST**

A box rests on a plank that is inclined to the horizontal. As the angle between the plank and the horizontal increases, does the component of the weight of the box parallel to the plank increase, decrease, or remain the same? Please just answer Suzanne, you are going to have ...
*October 17, 2006 by Suzanne*

**Calculus**

4. A gas station stands at the intersection of a north-south road and an east-west road. A police car is traveling towards the gas station from the east, chasing a stolen truck which is traveling north away from the gas station. The speed of the police car is 100 mph when it ...
*April 7, 2010 by MILEY*

**CALCULUS**

A gas station stands at the intersection of a north-south road and an east-west road. A police car is traveling towards the gas station from the east, chasing a stolen truck which is traveling north away from the gas station. The speed of the police car is 100 mph when it is 3...
*April 8, 2010 by MILEY*

**Calculus**

RP^2=RQ^2 + QP^2 -2(RQ)*(QP)cosQ (1) QP = 24 (km/min) t (2) Diffentiate both sides w.r.t. the time t: 2 RP* d Rp/dt = 2 t [24 (km/min)]^2 -2(RQ)* 24 (km/min) cosQ (3) Using (1) and (2) you find out what RP is at t = 4 minutes. You plug that into (3) and solve for d Rp/dt. A ...
*November 14, 2006 by Count Iblis*

**physics**

Q. A 200 kg load is suspended by a cable from a crane . Two ropes are attached to the load , acting at 90 deg to each other. One rope exerts a pull of 220 N , at 10 deg below horizontal, the other rope exerts a force of 360 N at 15 deg below horizontal. Calculate 1)tension in ...
*February 7, 2014 by john*

**science**

A protein polypeptide chain exists in α-helical conformation in a solvent and it has a value of -30,000 deg cm2 dmol-1 for the mean residue ellipiticity at 222 nm ([θ]222) in the temperature range 20-50°C. On raising the temperature above 50°C,[θ]222 increases ...
*June 5, 2011 by amandep *

**Math**

A train leaves a station and travels north at a speed of 45mph. Four hours later, a second train leaves on a parallel track and travels north at 105 mph. How far from the station will they meet? The trains will meet ________ miles away from the station
*March 5, 2014 by Pam*

**Logarithmic Function**

A spacecraft is approaching a space station that is orbiting Earth. When the craft is 1000 km from the space station, reverse thrusters must be applied to begin braking. The time, t, in hours, required to reach a distance, d, in km, from the space station while the thrusters ...
*May 17, 2009 by Jus*

**CHEMISTRY**

selenium tetrafluoride, SeF4 is a colorless. it has vapor pressure of 757mmhg at 105 deg c and 522mmhg a 95 deg c. what is the vapor pressure of carbon disulfide at 35 deg c?
*September 19, 2007 by Del*

**Calculus**

A rocket is launched into the air verically is tracked by a radar station on the ground 3 km from the launch site. What is the veritcal speed of the rocket at the instant when the distance from the radar station is 5 km and this distance is increasing at a rate of 5 000km/hr...
*December 10, 2006 by Thomas*

**Memt 202**

If a rod of 1025 steel 0.5 m (19.7 in) long is heated from 20 to 80 deg C (68 to 176 deg F) while its ends are maintained rigid, determine the type and magnitude of stress that develops. Assume that at 20 deg C the rod is stress free.
*November 11, 2010 by alok*

**physics**

A projectile is projected with speed u at an angle alpha on an inclined plane of inclination angle bita. Find time of flight nn inclined plane and maximum height attained by projectile w.r.t. Inclined plane, range of projectile on inclined plane, angle of projection for which ...
*July 24, 2011 by Shivam*

**chemistry calculations**

At 25 deg C, Kc is 5.84x10-3 for the dissociation of dinitrogen tetraoxide to nitrogen dioxide. N2O4(g) ==== 2NO2(g) a) Calculate the equilibrium concentration of both gases when 4.00 grams of N2O4 is placed at 2.00-liter flask at 25 deg C. b) What will be the new equilibrium ...
*August 30, 2014 by =)*

**geometry**

Two angles of a quadrilateral measure 210° and 100°. The other two angles are in a ratio of 2:3. What are the measures of those two angles? I know the four angles add to 360 deg. So the two unknowns are 50 deg together. 20 and 30 deg angles would give a ratio of 2:3, but what ...
*April 21, 2011 by Leilani*

**Trigonometry**

A car traveling at a constant rate due east passes an interstate exit that is 1.0 mile from a gas station. The gas station is S50°E of the exit. After the car has traveled for 2.0 minutes, its bearing to the gas station is S55°W. How fast is the car traveling?
*September 29, 2014 by Theresa*

**physics**

1. A ship has a top speed of 3.0 m/s in calm water. The current of the ocean tends to push the boat at 2.0 m/s on a bearing of due South. What will be the net velocity of the ship if the captain points his ship on a bearing of 55 North or West and applies full power?
*March 5, 2014 by Amanda*

**Geography**

What is the time and day at a certain place X (Lat 25 deg N,Long 33 deg W) when at is 2.30 AM on Thurs Day at a place Y (Lat 25 deg S,Long 27 deg E) ?
*May 3, 2011 by Sumit Guha*

**Chemistry**

In order to raise the temperature of 5.0 Kg of water from 20 deg. C to 30 deg. C, a 2.0 kg iron bar is heated and then dropped into the water. What should the starting temperature of the bar be? (Specific heat Fe is 0.22 cal/g-deg.)
*February 23, 2010 by Lexie*