Thursday

July 28, 2016
Number of results: 56,517

**Physics**

Given an object distance of 48[mm] and a thin-lens focal length of 110[mm], then what is the image distance? What is the scale factor (M) of the image seen in the previous question?
*May 3, 2015 by Bri*

**Physics**

Dave needs to get groceries from the store, which is a distance of 1.7 km east of his house. Dave rides his bike to the store at a constant speed of 6.6 m/s, and rides back to his house at the slower speed of 2m/s. A)How long in seconds does it take Dave to reach the store? B)...
*September 15, 2015 by Haley*

**Pre calc**

Thanks in advance for any help. I need help with this whole problem. The distance s(t) between an object and its starting point is given by the antiderivative of the velocity function v(t). Find the distance between the object and its starting point after 15 seconds if v(t)=0....
*May 14, 2008 by Peter*

**physics**

Two loudspeakers are placed above and below each other and driven by the same source at a frequency of 3.70 102 Hz.An observer is in front of the speakers at point O, at the same distance from each speaker. What minimum vertical distance upward should the top speaker be moved ...
*May 3, 2012 by andrew *

**Calculus**

Two electrical charges, one a positive charge A of magnitude a and the other a negative charge B of magnitude b, are loacted a distance c apart. A positively charged Particle P is situated on the line between A and B. Find where P should be put on so that the pull away from A ...
*November 12, 2006 by SCk9*

**Physics 1**

A body of mass 6kg moving at 8m/s collides with a stationary body of mass 10kg and sticks to it. Find the speed of the composite body immediately after the impact.
*June 10, 2013 by Dan*

**physics**

A reflecting telescope is used to observe two distant point sources that are 3.50 m apart with light of wavelength 600 nm. The telescope's mirror has a radius of 5.0 cm . What is the maximum distance in meters at which the two sources may be distinguished?
*June 22, 2016 by kay*

**Math Help!!!**

Russell Grossman is training for the Olympics. He wants to know the distance across lake royal, so he can write in his training logbook how far he rows each day. If from one point on the shore to one side of the lake is 13 km and from the same point to another side of the lake...
*November 19, 2014 by Anonymous*

**Astronomy - Physics**

Finally, we will look at a system that is in an orbit comparable to the Earth to see how the angle that the light strikes the surface and the length of day contribute to the total amount of energy that we receive from the Sun at the two solstices. Recall that the changing ...
*March 9, 2013 by Amy*

**math**

pei fen walked a distance of 526 m.then she walked for another 5minutes at a speed of 70m/min.she took a total of 12 min to walk the entire distance. A.find the total distance that pei fen walked b.what was pei fen's average speed for the whole journey?
*March 20, 2012 by Da S*

**trigo--help!**

how do i do this question? a ladder length 13m rests against a vertical wall with its foot on a horizontal floor at a distance of 5m from the wall. when the top of the ladder slips down a distance of x, the foot of the ladder moves out x. find the distance of x. a^2 + b^2 = c^...
*March 12, 2007 by holly*

**Physics**

(a) Two boxes of different mass are at rest on a ramp. What is the minimum coefficient of static friction between the boxes and the ramp if the system is in equilibrium? Given M=(1+0.34)m (b) Suppose there is no friction between the upper box and the ramp. What is minimum ...
*February 25, 2016 by Supansa*

**Physics ~ please help!**

An object is p = 34.3 cm in front of a concave mirror. Its real image height is 6 times larger than the object height. What is the location of the image? Answer in units of cm. What is the radius of curvature of the mirror? Answer in units of cm.
*April 28, 2011 by cr*

**science**

when an object is placed 8 millimeters from a concave spherical mirror, a clear image can be projected on a screen 16 millimeters in front of a mirror,If the object has a height of 4 millimeters, the height of the image is
*April 20, 2009 by Anonymous*

**math**

A chemical distillation tower, 110 m high is supported by cables of length L that reach from the top of the column to the ground at a distance D from the base of the tower. If D is 1/3 the length of a cable, find L and D.
*September 13, 2012 by david*

**math**

The distance d in miles that can be seen on the surface of the ocean is given by d = 1.6 h, where h is the height in feet above the surface. How high (to the nearest foot) would a platform have to be to see a distance of 19.5 miles?
*December 6, 2011 by leona*

**Correlations**

Which type of correlation would you expect to see between the distance traveled and the time it takes to travel that distance? A. positive correlation B. negative correlation C. no correlation idk why this question is confusing me, but it is
*November 11, 2013 by hermes*

**algebra**

Which type of correlation would you expect to see between the distance traveled and the time it takes to travel that distance? A. positive correlation B. negative correlation C. no correlation idk why this question is confusing me, but it is
*November 12, 2013 by hermes*

**Algebra 2**

The vertices of a feasible region are A(1,2), B(5,2), C(1,40. Write a function that satisfies each equation. a) A is the maximum and B is the minimum. b) C is the maximum and B is the minimum. c) B is the maximum and A is the minimum.
*October 18, 2012 by Marilu*

**Algebra 2**

The vertices of a feasible region are A(1,2), B(5,2), C(1,4). Write a function that satisfies each equation. a) A is the maximum and B is the minimum. b) C is the maximum and B is the minimum. c) B is the maximum and A is the minimum.
*October 18, 2012 by Marilu*

**statistics**

Assume the body temperture of healthy adults are normally distributed with a mean of 98.20 degrees F and a standard deviation of 0.62 degrees F... a. If you have a body temperture of 99.00 degrees F, what is your percentile score? b. Convert 99.00 degrees F to a standard score...
*May 8, 2010 by Jamie*

**physics**

a concave mirror of diameter 40m is used with a 6cm tall object placed 20 cm from it. Where is the image? Can you check my solution Radius(R)=20cm Distance object(do)=20cm (2/R)=(1/do)+(1/di) (1/di)=(2/R)-(1/do) why do they give you the object height i dont think you need to ...
*April 28, 2008 by shan*

**Physics**

(a) Estimate the positive charge in you due to the protons in the molecules present in your body. (Assume that the human body is made entirely out of water.) (b) What is the net charge in your body?
*January 29, 2016 by Alyssa*

**Statistics**

A driving machine was employed to hit a sample of 41 each of two different brands of golf balls using the same force each time. The research team measured the distance between the point of impact and where the ball eventually came to rest on the ground. Results are show below...
*June 21, 2010 by Randi*

**math**

The area of a rectangular space is 128 square feet. a. Find all the possible pairs of whole number dimensions in feet. b. Explain which pair allows enough space for a car to park. c. If the length of the space is x feet, how would you describ e the width using the area and the...
*March 20, 2014 by Anonymous*

**Calculus**

A fence 3 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building. Answer the following: The distance along the ladder to the top ...
*June 18, 2013 by Morgan*

**Science Help**

1.) A rail gun uses electromagnetic energy to accelerate objects quickly over a short distance. In an experiment, a 2.00 kg projectile remains on the rails of the gun for only 2.10x10-2 s, but in that time it goes from rest to a velocity of 4.00×103 m/s. What is the average ...
*October 18, 2014 by Kenny*

**chemistry**

1998 scientists using a special type of electron microscope were able to measure the force needed to break a single chemical bond. If 2.0 x 10^-9 N was needed to break a C-Si bond, estimate the bond enthalpy in kJ/mol. Assume that the bond had to be stretched by a distance of ...
*September 26, 2011 by Amber*

**English**

Which of the following do Petrarchan and Shakespearean sonnets have in common? A. rhyme scheme B. length C. question and answer format D. Both are organized as an octet and a sestet I Chose Answer B. length. I wanted someone to check my answer to see if it was correct. Thank you.
*February 15, 2016 by Justine*

**Government Studies**

How long do you need to train to join the military (minimum)? I'm not talking about West Point or prestigious schools, just basic training needed for combat. thanks
*April 9, 2009 by Mario*

**Physics 210**

A football kicker is trying to make a field goal from 42.0m. If he kicks at 35∘ above the horizontal, what minimum speed is needed to clear the 3.10m high crossbar?
*September 10, 2013 by Courtney*

**Statistics **

Find the minimum sample size needed to estimate the population proportion if the margin of error is 0.07 confidence level is 95% and from a prior study p hat is estimated by decimal equivalent of 94% A) 39 b)45 c)43 d)44
*April 21, 2015 by Leslie667*

**Statistics**

Find the minimum sample size needed to estimate the population proportion if the margin of error is 0.07 confidence level is 95% and from a prior study p hat is estimated by decimal equivalent of 94% A) 39 b)45 c)43 d)44
*April 22, 2015 by Leslie667*

**algebra**

when you look over an unobstructed landscape or seascape, the distance to the visable horizon depends on your height above the ground. The equation is a good estimate of this, in which d=distance to horizon in miles and h=height of viewer above the ground, in feet.. It is ...
*November 5, 2010 by Brandy*

**algebra**

true or false 1. fraction cant be written as decimal. 2. natural numbers are referred to as counting numbers.whole numbers consists of counting numbers.whole numbers consist of counting numbers as well as the number 0 3. intergers do not include negative numbers. 4. ...
*August 31, 2008 by samanthast*

**Physics**

Your parents have just bought you a new Canon digital camera. You wish to show your friends a picture of it, but you have no other cameras in the house. So you decide to stand 1.5 m in front of a flat mirror. For what distance should you focus your camera lens?
*March 7, 2015 by Anonymous*

**business lowercapstone**

Assignment Type: Individual Project Deliverable Length: 4-5 body pages, 1 PERT chart, 1 Gantt chart Points Possible: 185 Due Date: 4/22/2012 11:59:59 PM CT Using your current work organization (or an organization of interest) as the subject matter, research the elements of ...
*April 16, 2012 by dana*

**reading / riddle**

rene obsreves the body and files her report.her report is filed but not with the police. because many others will observe the body ,too. though the local police will not be called to ivestigate. why? Is she a med student? Is the report filed with her professor? Is the body a ...
*August 24, 2005 by becky garcia*

**Math**

Solve the equation: (-3/p+2) = (-8/p-3) Can someone please show me how to do this? I have a whole page of these to do but I don't really know what to do. If I could just see one done, I'm sure I can figure the rest out. Thank you.
*March 27, 2010 by Chad*

**Nicholas**

Estimate the minimum distance in which a car accelrates from rest to 10m/s if its motor is extremly powerfull
*December 23, 2015 by Hanna*

**Calculus Help **

A high-speed bullet train accelerates and decelerates at the rate of 4 ft/s2. Its maximum cruising speed is 90 mi/h. (Round your answers to three decimal places.) (a) What is the maximum distance the train can travel if it accelerates from rest until it reaches its cruising ...
*April 19, 2014 by Ali*

**physics**

A 52 g mountain climber, start from rest, climbs a vertical distance of 730 m. At top, she is again at rest. In the process, her body generates 4.1*10^6 J of energy via metabolic processes. Her body acts like a heat engine with efficiency ( W/Q_h.) W is the magnitude of work ...
*November 18, 2010 by david*

**physics**

The human body can safely tolerate an acceleration 9.00 times that due to gravity. with what minimum radius of curvature may a pilot recover from a dive in pitching up the airplane if the airplanes speed is 770km/h at the end of the dive?
*November 3, 2013 by Anonymous*

**physics**

a concave mirror of diameter 40m is used with a 6cm tall object placed 20 cm from it. Where is the image? Can you check my solution Radius(R)=20cm Distance object(do)=20cm (2/R)=(1/do)+(1/di) (1/di)=(2/R)-(1/do) why do they give you the object height i dont think you need to ...
*April 28, 2008 by shan*

**physics**

A body of mass 10 kg moving at a speed of 4 m/s collides with another body of mass 4 kg at rest. After collision, if the speed of the body of 4kg mass be 5 m/s, the speed of body of 10kg mass shall be?
*May 17, 2015 by Satyabrata Saha*

**Physics**

An object is located midway between the focal point and the center of a concave spherical mirror. Draw a ray diagram to locate its image. Is the image real or virtual, erect or inverted, magnified or reduced in size? Completely baffled by above question and the next question. ...
*July 16, 2016 by Anna*

**Math**

am having difficulties trying to find out the missing dimensions of a cutout piece. Can someone please tell me how to figure out the dimensions. They've given me the dimensions for the whole solid, but just not the cut out piece. Your help will be appreciated :-) There is a ...
*February 10, 2010 by Sara*

**physics**

A solid uniform 45.0 kg ball of diameter 32.0 cm is supported against a vertical frictionless wall using a thin 30 cm wire of negligible mass. (a) make a free body diagram for the ball and use it to find the tension in the wire and (b) how hard does the ball push against the ...
*June 11, 2010 by L*

**math**

an extension ladder adjusts in length from 10 feet to 16 feet. suppose you've leaned your ladder against your house so that, at its minimum length, it touches the base of your first floor window, 9 feet above the ground. without moving the base, how high will the ladder reach ...
*September 26, 2009 by Anonymous*

**Child Care**

1. The interaction between a child's biological makeup and the environmental influences that affect his or her development and behavior is called the a) balanced systems approach b) ecological systems theory c) body in the classroom analysis d) me/them dynamic 2. Alcohol, ...
*March 9, 2011 by Rachel*

**Math/Algebra...can you check this please...**

f(x)= -4(x+5)^2+3 The vertex is : -5,3 The line of symmetry is x= 3 The maximum/minimum value of f(x)= -5 Is the value of f(-5)=3, a minimum or maximum? Minimum Graphing would open from the bottom going up on the negative side.
*August 22, 2010 by Angel Eyes*

**statistics**

Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F (based on data from the University of Maryland researchers). a. (0.1 point) If you have a body temperature of 99.00 °F, what is your percentile ...
*May 10, 2010 by Nathan*

**physics**

a body is pulled over a surface by applying 20 Newton making an angle 60 degree with the horizontal.if the body moves with constant speed on a rough surface on which coefficient of friction is .4 then the mass of the body is?
*July 20, 2014 by hanan *

**pysics.**

What is the minimum work needed to push a 975 kg car 230 m up along a 17.5° incline? Assume the effective coefficient of friction retarding the car is 0.20?
*October 12, 2009 by Joe*

**AP Calculus**

A cardboard box of 108in cubed volume with a square base and no top constructed. Find the minimum area of the cardboard needed. (Optimization)
*October 31, 2010 by Anonymous*

**physics**

1.)A rock at the blank of a coast is struck by water waves.find the frequency of the waves striking the rock,if the distance between two consecutive crests or troughs is 100m.velocity of water wave is 150m/sec. 2.)the timeperiod of a vibrating body is 0.1sec.the waves produced...
*May 18, 2012 by srikar*

**Integration**

a cattle trough has a trapezoidal cross section with a height of 1 m and horizontal sides of width 1/2 m and 1 m assume the length of the trough is 10 m. A. how much work is required to pump out the water in the trough? B. if the length is doubled does the amount of work ...
*December 21, 2014 by Anonymous*

**Physics**

The microscope has a converging lens (the eyepiece) with a focal length of 2.50 mounted on one end of a tube of adjustable length. At the other end is another converging lens (the objective) that has a focal length of 1.00 . When you place the sample to be examined at a ...
*April 22, 2010 by Robyn*

**Astronomy**

Calculate the ratio of the escape velocities from the moon and Earth. Calculate the ratio of the escape velocities from the moon and Earth In order to escape the gravitaional pull exerted by a central body on an orbiting object, it must must achieve a minimum inertial velocity...
*April 10, 2007 by Manny*

**structure and function of the human body**

What is the importance of ATP? explain where carbohydrate metabolism occurs in the cell, what additonal ingredient is needed and what waste product is produced in this process?
*November 27, 2012 by Liz*

**Math**

When you look out over an unobstructed landscape or seascape, the distance to the visible horizon depends on your height above the ground. The equation d=3/2h is a good estimate of this, in which d=distance to horizon in miles and h=height of viewer about the ground in feet. ...
*January 17, 2011 by Sherry*

**science**

Dan wants to lift his car using a movable pulley system like the one shown in the picture. Using a movable pulley system will decrease the force needed to lift the car by increasing the A. total mass of Dan's body. B. strength contained in Dan's arms. C. total mass of the car...
*February 7, 2016 by Lakshmi*

**Physics**

One way to determine the distance to the moon is to bounce a laser beam off a mirror on its surface. How far away is the moon if it takes 2.56 seconds for the laser to "echo" off the moon?
*April 2, 2013 by Denise*

**MATH**

WHEN MR. LOWE RETURN FROM HIS FISHING TRIP, HIS STUDENTS INQUIRED AS TO THE LENGTH OF HIS PRIZE CATCH. MR. LOWE ANSWERED. "THE HEAD MEASURED 9 INCHES." "THE TAIL WAS AS LONG AS THE HEAD AND HALF THE BODY." THE BODY WAS AS LONG AS THE HEAD AND TAIL." HOW LONG WAS MR. LOWE'S ...
*May 19, 2010 by MIMI*

**math**

WHEN MR. LOWE RETURN FROM HIS FISHING TRIP, HIS STUDENTS INQUIRED AS TO THE LENGTH OF HIS PRIZE CATCH. MR. LOWE ANSWERED. "THE HEAD MEASURED 9 INCHES." "THE TAIL WAS AS LONG AS THE HEAD AND HALF THE BODY." THE BODY WAS AS LONG AS THE HEAD AND TAIL." HOW LONG WAS MR. LOWE'S ...
*November 23, 2014 by Maya Is The Best Freaking Person Ever!*

**Algebra**

The data below represents the average score per game of the top 40 NBA players, rounded to the nearest whole number. Find the minimum, Q1, median, Q3, maximum for the data. Stem l leaf 1 l 55667777888888899 2 l 00000011123445566679 3 l 135
*May 2, 2013 by Allie*

**Physics - urgent, please help**

In its final trip upstream to its spawning territory, a slamon jumps to the top of a waterfall 1.9m high. What is the minimum vertical velocity needed by the salmon at the end of this motion?
*February 21, 2009 by Li*

**Chemistry**

Given the equation: 6CO2(g) + 6H2O(l) -> C6H12O6(s) + 6O2(g) What is the minimum number of liters of CO2(g), measured at STP, needed to produce 32.0 grams of oxygen? 1) 264 L 2) 32.0 L 3) 192 L 4) 22.4 L How do I solve?
*June 14, 2009 by Ken*

**calculus**

A small dog shelter in the shape of a rectangular solid is to have a square base and an open front. If the volume is to be 36ft^3, find the dimensions for which the amount of material needed is a minimum. V=2x*y
*November 4, 2011 by HELP!*

**physics**

A 56.0 ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.00 turns each second. The distance from one hand to the other is 1.5 . Biometric measurements indicate that each hand typically makes up about 1.25 of body weight. ...
*November 8, 2010 by steph*

**Physic (concepts-please check my thoughts)**

A net torque applied to a rigid object always tends to produce? a)translational acceleration b) rotational equilibrium c) rotational acceleration d) rotational inertia e) none of these work (c) Torque produces torsion and tends to produce rotation. The net torque acting on a ...
*December 10, 2006 by Diane*

**algebra**

A bicyclist rode into the country for 5hr. In returning her speed was 5 mi/h faster and the trip took 4 hr. what was her speed each way? What equation would I use to solve this problem i have no idea Let V be her speed going out, so V+5 will be her speed coming back. Let the ...
*March 23, 2007 by rob*

**Health Care**

Seven Organizational Approaches A. Use the matrix below to describe each approach to organizing information about the body. Discuss how each approach can be used. Approach Describe the approach How might the approach be used? Body planes and directions Body cavities Quadrant ...
*May 30, 2008 by sue*

**bio**

I did a pig dissection , but i am not to sure about these questions, any help would be great ! 1. The lungs of a fetal pig serve as a protection for what important body organ 2. The respiratory system is located on the ventral side of the pigs body, what 3 ways is the tract ...
*January 22, 2012 by Annie*

**Math**

What are all the whole number pairs of length and width values that give an area of 24 square meters for a rectangle?
*October 18, 2010 by Nicole*

**physics**

whn a body hanging frm a spring balance is immersed in water it floats in water just below the surface of water & shows 100g loss in its weight 1-wht is thw weight of body in water? 2-wht is thw weight of body in air 3-wht is upthrust on the body? 4-wht is the vol. of body? ...
*September 17, 2015 by Riya sood*

**physics**

If a person does 80 J of work in moving a 30 \rm{kg} box over a 13 m distance on a horizontal surface, what is the minimum force required?
*October 6, 2010 by Jon*

**math calc 2**

a cattle trough has a trapezoidal cross section with a height of 1 m and horizontal sides of width 1/2 m and 1 m assume the length of the trough is 10 m. A. how much work is required to pump out the water in the trough? B. if the length is doubled does the amount of work ...
*October 25, 2012 by arnulfo*

**math calc 2**

a cattle trough has a trapezoidal cross section with a height of 1 m and horizontal sides of width 1/2 m and 1 m assume the length of the trough is 10 m. A. how much work is required to pump out the water in the trough? B. if the length is doubled does the amount of work ...
*October 26, 2012 by arnulfo*

**Physics**

An unknown mass has an acceleration of 2 m/s2 to a 1 kg body.if the same force accelerate another body of 8 m/s2 .what is the mass of the body?
*June 14, 2014 by Espie*

**physics **

What is the minimum work needed to push a 950 kg car 890 m up along a 8.0 degree incline? Assume the effective coefficient of friction retarding the car is 0.22.
*October 10, 2011 by Luke *

**Physics**

A transport plane takes off from a level landing field with two gliders in tow, one behind the other. The mass of each glider is 700 {kg}, and the total resistance (air drag plus friction with the runway) on each may be assumed constant and equal to 2100N . The tension in the ...
*March 12, 2013 by Gareth*

**science and technology**

whn a body hanging frm a spring balance is immersed in water it floats in water just below the surface of water & shows 100g loss in its weight 1-wht is thw weight of body in water? 2-wht is thw weight of body in air 3-wht is upthrust on the body? 4-wht is the vol. of body? ...
*January 8, 2016 by raman*

**Science, Physics**

Concave mirrors can be used as for shaving or applying make up. The face must be inside the focus. You hold a concave mirror, with a focal length of 40 cm, about 30 cm from your face. Where is your image located? How much bigger than your face is the image?
*March 19, 2015 by Nora*

**algebra**

2. The equation D=1.2 square h gives the distance, D, in miles that a person can see to the horizon from a height, h, in feet. a. Solve this equation for h. b. Long’s Peak in Rocky Mountain National Park, is 14,255 feet in elevation. How far can you see to the horizon from the...
*March 23, 2010 by kathy*

**Brock**

An object creates an inverted, virtual image, 3 cm tall, 10 cm from a converging mirror with a focal length of 15 cm. Where is the object located? How tall is it? I didn't think mirrors created inverted virtual images...
*February 24, 2009 by Physics*

**Science**

Find the mean time for each ramp length Mean 3.6s Find the ball's acceleration for each mean time using the equation below where D is distance or ramp length and T is time Acceleration=2D/T^2 1.5m(Distance) Use 3.6
*October 2, 2014 by Coleson*

**Math**

The time needed to complete a final examination in a particular college course is normally distributed with a mean of 83 minutes and a standard deviation of 13 minutes. Answer the following questions. What is the probability of completing the exam in one hour or less (to 4 ...
*October 22, 2015 by Kelsey*

**math**

using coins from home, build a design with mirror symmetry on student sheet 5, Half and half. Then answer the following questions.Build side A of your design on one side of the sheet, hal and half. Amount of $ side a is worth and how much the whole design is worth?
*September 16, 2008 by tanya*

**physics**

Body A of mass M has an original velocity of 6.2 m/s in the +x-direction toward a stationary body (body B) of the same mass. After the collision, body A has velocity components of 1.1 m/s in the +x-direction and 2.2 m/s in the +y-direction. What is the magnitude of body B's ...
*March 11, 2011 by Steve*

**calculus**

Find the absolute extrema of the function (if any exist) on each interval. (If an answer does not exist, enter DNE.) f(x) = square root of (25 − x^2) (a) [−5, 5] minimum (x, y) = (smaller x-value) (x, y) = (larger x-value) maximum (x, y) = (b) [−5, 0) minimum...
*April 5, 2016 by Sagar*

**Physics**

2.- A 2inx4inx8ft is leaning against the wall, draw afree-body diagram of forces on it. Give an expression throughdetailed steps using the diagram what would be the minimum angle ofthe wooden bar with the floor so it won’t slide.
*June 11, 2013 by Chi-Chi*

**Spanish**

can't you do actual revision ; instead of just words. it would make it a whole lot easier, because what if we didn't need to revise on those particular words and needed RESEARCH?
*November 6, 2008 by Grace*

**physics.. important stuff !**

i still do not understand?? can someone please help me out??? (a) why is the centripetal force neede to keep a body moving in a circular path? (b) In what direction does a centripetal force accelerate the body on whic it acts?? (c) Upon what threee factors does the centripetal...
*January 15, 2007 by maria*

**math**

two boats p and q are at points whose position vector are 4i+8j and 4i+3j respectively. both of the boats are moving at a constant velocity of p is 4i+j and q is 2i+5j. find the position vectors of p&q and pq after t hours, and hence express the distance between p and q ...
*February 6, 2016 by Joshua*

**physics- drbob can u plz help me???**

VERY IMPORTANT FOR AN ESSAY ASSIGNMENT. PLEASE HELP ASAP! THANK U VERYYYYY MUCH! 1. What force is needed to give a mass of 25 kg an acceleration of 20m/s squared? 2. A force of 6N acts upon a 2-kg mass. What is the acceleration of the masS? 3. It takes a force of 50N to give a...
*December 13, 2006 by Nicola*

**Physics**

A personne walking at a speed of 1.7m/s see's a stoped bus 25m from him. At this moment this person starts to run with an acceleration of 1,3m/s2. After 4 secondes this personne has reached his maximum speed et it stays constant, but at the same time the bus starts moving and ...
*March 22, 2007 by Nick*

**Physics**

If a 65 kilogram load was raised 6 meters in 60 seconds determine the minimum rated wattage of the motor needed to accomplish this assuming the motor is 75% efficient. give your answer in W.
*January 31, 2014 by Joe*

**math**

a rectangle has an area of 48 square yards. For what whole number values of length and width will the rectang,e have the smallest perimeter?
*April 29, 2015 by Maddie *

**math**

What is the perimeter of a rectangle if each side is a whole number of meters,and what are the possible dimensions for the length and width. List them and explain your answer.
*December 2, 2015 by sybil*