Friday

February 24, 2017
Number of results: 89,632

**science help please**

1. Which of the following best describes the movement of an object at rest if no outside forces act on it? (1 point) It will move due to inertia. Gravity will eventually cause it to move. It will stay at rest due to inertia. It will stay at rest due to gravity. 2. A 2,500 kg ...

*March 21, 2016 by PlsHelp*

**math**

on the moon, the acceleration due to gravity is 1.6m/ sec 1. If instead of being released from rest, the rock is thrown into the crevasse from the same point with a downward velocty of 4m/sec, when will it hit the bottom and how fast will it be going when it does 2. how far ...

*November 11, 2009 by sarah*

**physics**

A firefighter a distance d from a burning building directs a stream of water from a fire hose at angle θi above the horizontal as in the figure. If the initial speed of the stream is vi, at what height h does the water strike the building? (Use theta for θi, vi for ...

*February 18, 2011 by eric*

**physics**

You do a physics lab experiment on another planet. A small block is released from rest at the top of a long frictionless ramp that is inclined at an angle of 36.9° above the horizontal. You measure that a small block travels a distance 17.0 m down the incline in 8.60 s. What ...

*September 21, 2015 by dianna li*

**Physics**

A fire helicopter carries a 358 kg bucket at the end of a 10.4 m long cable. When the helicopter is returning from a fire at a constant speed of 51.4 m/s, the cable makes an angle of 23.7◦ with respect to the vertical. Find the horizontal force exerted by air resistance on ...

*November 3, 2016 by well*

**Physics**

Two masses are suspended from a pulley as shown in the figure . The pulley itself has a mass of 0.30 kg, a radius of 0.20 m, and a constant torque of 0.30 m \cdot N due to the friction between the rotating pulley and its axle. What is the magnitude of the acceleration of the ...

*November 28, 2010 by Garry*

**Physics**

Two masses are suspended from a pulley as shown in the figure . The pulley itself has a mass of 0.30 kg, a radius of 0.20 m, and a constant torque of 0.30 m \cdot N due to the friction between the rotating pulley and its axle. What is the magnitude of the acceleration of the ...

*November 28, 2010 by Stacy*

**physics**

Two masses are suspended from a pulley as shown in the figure below (the Atwood machine). The pulley itself has a mass of 0.20 kg, a radius of 0.15 m, and a constant torque of 0.35 m·N due to the friction between the rotating pulley and its axle. What is the magnitude of the ...

*January 9, 2011 by melissa*

**physics**

Two masses are suspended from a pulley as shown in the figure below (the Atwood machine). The pulley itself has a mass of 0.20 kg, a radius of 0.15 m, and a constant torque of 0.35 m·N due to the friction between the rotating pulley and its axle. What is the magnitude of the ...

*January 9, 2011 by lissa*

**physics**

Two masses are suspended from a pulley as shown in the figure below (the Atwood machine). The pulley itself has a mass of 0.20 kg, a radius of 0.15 m, and a constant torque of 0.35 m·N due to the friction between the rotating pulley and its axle. What is the magnitude of the ...

*January 9, 2011 by i need help please!*

**Physics. PLEASE HELP!!**

A skier of mass 71 kg is pulled up a slope by a motor-driven cable. The acceleration of gravity is 9.8 m/s2. How much work is required to pull him 64.6 m up a 33.8 slope (assumed to be frictionless) at a constant speed of 2.53 m/s? Answer in units of kJ

*March 26, 2012 by Ashley*

**physics**

Two chambers are filled with a fluid. The ceiling of chamber 1 is at the same level as the floor of chamber 2. The pressure at the floor of chamber 2 is 1.2 × 105 Pa. If the area of the ceiling of chamber 1 is 2.0 m2, what is the magnitude F of the force exerted by the fluid ...

*February 7, 2017 by Tyler*

**Physics**

A mass is hanging on the end of a spring and oscillating up and down. There are three forces acting on the mass, the force of the spring, the force of gravity, and the force of air resistance. Which of these forces can be associated with potential energy function? a. the ...

*June 3, 2011 by Ramsey*

**Physics - Repost because of no response**

In an experiment on the shuttle, an electron with a speed of 6.3 x 105 m/s [N] and a mass of 9.11 x 10-31 kg is shot through an external magnetic field. Determine the strength and orientation of the magnetic field required so that the electron's direction of travel remains ...

*March 16, 2016 by Matt Damon*

**Physics - Repost because of no response**

In an experiment on the shuttle, an electron with a speed of 6.3 x 105 m/s [N] and a mass of 9.11 x 10-31 kg is shot through an external magnetic field. Determine the strength and orientation of the magnetic field required so that the electron's direction of travel remains ...

*March 16, 2016 by Matt Damon*

**polymer**

how can we set up column for monomer purification give the minimum lenth and diametter for the column.

*December 20, 2010 by pradee*

**physics**

A car is initially traveling due north at 24.0 m/s. A.) find the velocity of the car after 4.00 seconds if it's acceleration is 1.60 m/s2 due north. B.) find the velocity of the car after 4.00 seconds if it's acceleration is instead 1.95 m/s2 due south.

*September 3, 2012 by Anonymous*

**physics**

The speed of a bullet as it travels down the barrel of a rifle toward the opening is given by v = (-4.25 107) t 2 + (3.45 105) t, where v is in meters per second and t is in seconds. The acceleration of the bullet just as it leaves the barrel is zero. (a) Determine the ...

*January 22, 2015 by Anonymous*

**PHYSICS**

A wheel in the shape of a uniform disk of radius R and mass mp is mounted on a frictionless horizontal axis. The wheel has moment of inertia about the center of mass Icm=(1/2)mpR2 . A massless cord is wrapped around the wheel and one end of the cord is attached to an object of...

*November 18, 2013 by Anonymous*

**Physics 202**

A rail gun uses electromagnetic forces to accelerate a projectile to very high velocities. The basic mechanism of acceleration is relatively simple and can be illustrated in the following example. A metal rod of mass 10.0g and electrical resistance 0.100Ω rests on ...

*February 17, 2015 by Tiffany*

**physics**

A resultant force of 20 N gives a body of mass m an acceleration of 8 m/s^2 and a body of mass m' acceleration of 24 m/s^2. What acceleration will this force cause the two masses to acquire if fastened together.

*September 3, 2015 by paresh*

**physics**

A skier of mass 54.6 kg comes down a slope of constant angle 21◦ with the horizontal. The acceleration of gravity is 9.8 m/s2 . What is the force on the skier parallel to the slope? Answer in units of N

*January 10, 2012 by Connor*

**physics**

A skier of mass 54.6 kg comes down a slope of constant angle 21◦ with the horizontal. The acceleration of gravity is 9.8 m/s2 . What is the force on the skier parallel to the slope? Answer in units of N

*January 10, 2012 by Connor*

**physics**

A skier of mass 54.6 kg comes down a slope of constant angle 21◦ with the horizontal. The acceleration of gravity is 9.8 m/s2 . What is the force on the skier parallel to the slope? Answer in units of N

*January 10, 2012 by Connor*

**physics**

A skier of mass 40.6 kg comes down a slope of constant angle 30◦ with the horizontal. What is the force on the skier parallel to the slope? Neglect friction. The acceleration of gravity is 9.8 m/s 2

*October 16, 2013 by ZAIMAH*

**physics**

A person is standing on a spring bathroom scale on the floor of an elevator which is moving up and slowing down at the rate of 1.53 m/s 2 . The acceleration of gravity is 9.8 m/s 2 . If the person’s mass is 83.4 kg, what does the scale read?

*October 23, 2014 by Anonymous*

**physics**

A rocket of mass 4.50 105 kg is in flight. its thrust is directed at an angle of 64.0° above the horizontal and has a magnitude of 7.50 106 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.

*November 20, 2010 by megan*

**physics**

A rocket of mass 4.5 105 kg is in flight. Its thrust is directed at an angle of 45.5° above the horizontal and has a magnitude of 7.60 106 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.

*February 7, 2013 by Dee*

**Geometry**

In my book there's a picture of an equalderal triangle. This is given information. Inside the triangle all three altitudes have been drawn to find the center point of gravity. The incircle is drawn. The circumcircle is drawn. Given that the radius of the incricle is 1, what is...

*May 15, 2008 by Geometry*

**Physics**

For this problem, ignore air resistance. You are to fire a rifle that shoots a particular bullet at 460 m/s at a target that is 45.7 m away and level with the rifle. Assuming that the acceleration due to gravity is 9.80 m/s², how high above the target must the barrel of the ...

*October 6, 2010 by Steven*

**Algebra**

Suppose that a constant force is applied to an object. Newton's Second Law of Motion states that the acceleration of the object varies inversely with its mass. A constant force acting upon an object with mass 12 kg produces an acceleration of 2m/s^2. The acceleration of ...

*February 3, 2016 by Lisa*

**Physics (please help!!!!)**

Blood pressure is usually reported in millimeters of mercury (mmHg) or the height of a column of mercury producing the same pressure value. Typical values for an adult human are 130/80; the first value is the systolic pressure, during the contraction of the ventricles of the ...

*April 16, 2011 by Anonymous*

**physics**

A shopper in a supermarket pushes a loaded cart with a horizontal force of 13 N. The cart has a mass of 36 kg. The acceleration of gravity is 9.8 m/s 2 . Disregarding friction, how far will the cart move in 4.5 s, starting from rest? Answer in units of m

*September 28, 2013 by Anonymous*

**Math**

I need help setting up this equation. The Volume, V, of a given mass varies directly as the temperature, T,and inversely as the pressure, P.

*February 16, 2012 by Chelsea*

**algebra**

"A column rises 16 ft. and has a radius of only 4 in. Find the volume of this column in cubic inches."

*August 19, 2012 by steve*

**physics**

A 2.0-m-tall, 30-cm-diameter concrete column supports a 3.0×105kg load. By how much is the column compressed (in mm) ?

*June 22, 2013 by Kate*

**Physics (Algerbra-based)**

A particle is moving clockwise around a circle with a radius 3.31 m. The magnitude of the total acceleration of the particle at the given instant is 14.3 m/s^2; the angle between the vector of total acceleration and the radius-vector of the particle is 30◦. Find the ...

*March 14, 2013 by Becky*

**physics**

An object with 15 grams mass is immersed in benzene and suffers an apparent loss of mass 5g What is the approximate specific gravity of the object? (specific gravity of benzene = 0.7)

*June 20, 2011 by Anonymous*

**Physics**

I got two questions Three blocks on a fricitonless horizontal surface are in contact with each other a force F is applied to block 1 mass m1 Draw a free body diagram for each block ok done the accelration of the system (in terms of m1, m2, and m3) ok done I got a = (m1 + m2 + ...

*July 12, 2009 by Physics*

**physics**

Explain with diagram the variation of the acceleration due to gravity (g) i) At a height h above the earth surface Inside the earth towards the centre of the earth. ii) What is the value of g at the centre of the earth. 2)Explain with example the term, damped harmonic motion 3...

*July 30, 2008 by GoodMatrix*

**physics**

A visitors to a lighthouse wishes to determine the height of the tower. The visitor ties a spool of thread to a small rock to make a simple pendulum, then hangs the pendulum down a spiral staircase in the center of the tower. The period of oscillation is 9.67 s. What is the ...

*February 16, 2012 by imel*

**PHysics!!**

Starting from rest at a height equal to the radius of the circular track, a block of mass 25 kg slides down a quarter circular track under the influence of gravity with friction present (of coefficient μ). The radius of the track is 15 m. The acceleration of gravity is 9....

*May 8, 2012 by Bob*

**Physics check my answer!**

In order to reduce potential danger to the environment, a biohazard laboratory maintains an internal air pressure that is 1% lower than atmospheric pressure. The net force acting on a 1.8-m2 external window of this laboratory due to air pressure is most nearly 1.8 N 18 N 1.8...

*June 15, 2012 by Kayla*

**Chemistry-thanks**

I have a method using HPLC (high performance liquid chromatography). It states that a 4.6 x 150mm,3um column should be used. (stationary phase : octadecylsilyl silica gel). I have a 4.6 x 100mm,2.7um column, silica-based, bonded-phase (non-polar) column. Can you advise if ...

*October 8, 2011 by angie*

**Physics**

A long uniform rod of length 6.66 m and mass 6.74 kg is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest in a vertical position as in the figure. Question 1: At the instant the rod is horizontal, find its angular speed. The ...

*October 31, 2008 by Jimmy*

**Chem**

A Kilogram was originally defined as the mass of ___________. The kilogram was originally defined as the mass of one litre of pure water at standard atmospheric pressure and at the temperature at which water has its maximum density (3.98 degrees Celsius). This definition was ...

*January 13, 2007 by Dennis*

**physics**

pls.. help me with this i really need it.. pls. A gas in a cylinder expands from a volume of 0.110 m3 to 0.320 m3. Heat flows into the gas just rapidly enough to keep the pressure constant at 1.65 x 105 Pa during the expansion. The total heat added is 1.15 x 105 J. (a) Find ...

*June 23, 2014 by acinad*

**Physics**

An Australian emu is running due west in a straight line at a speed of 12.8 m/s and slows down to a speed of 7.7 m/s in 7.4 s. (a) What is the direction of the bird’s acceleration? (b) Assuming that the acceleration remains the same, what is the bird’s velocity after an ...

*October 4, 2016 by Sam*

**science**

The mass of the girl in earth is 24kg. What is her mass and weight in moon if the moon's gravity is 1/6 of the earth' gravity?

*June 15, 2016 by angela*

**physics urgent helppp!!!**

A rocket of mass 4.50 105 kg is in flight. its thrust is directed at an angle of 49.0° above the horizontal and has a magnitude of 6.00 106 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.

*November 21, 2010 by hy*

**physics**

1) write the formula to find the magnitude of gravitational force between earth and an object on earth's surface 2) how does the value of gravitational force 'f'change between two objects? 3) what is direction of an object moving with an acceleration due to gravity?

*August 20, 2014 by Charika jakhar*

**Physics**

A block of mass 0.4 kg rests on the inclined surface of a wedge of mass 1.7 kg. The wedge is acted upon by a horizontal force F~ and slides on a frictionless surface. The acceleration of gravity is 9.81 m/s2. If the coeﬃcient of static friction between the wedge and the...

*October 8, 2012 by Amanda and Leah*

**Physics**

The four tires of an automobile are inflated to an absolute pressure of 2.0*10^5 Pa. Each tire has an area of 0.024m^2 in contact with the ground. Determine the weight of the automobile. Pressure*area= force. There are four tires.

*May 10, 2007 by Sarah*

**Finance**

Problem # 1 WACC and optimal capital structure – Elliott Athletics is trying to determine its optimal capital structure, which now consists of only debt and common equity. The firm does not currently use preferred stock in its capital structure, and it does not plan to do so...

*December 10, 2006 by Kim*

**physics**

Landing with a speed of 87.7 m/s, and traveling due south, a jet comes to rest in 939 m. Assuming the jet slows with constant acceleration, find the magnitude and direction of its acceleration. Magnitude of acceleration

*September 5, 2012 by martha*

**physics**

A student sets up an Atwood machine with a frictionless rope, a 4.5-kg mass, and a 9.5-kg mass. What will be the acceleration of the masses? Use the gravitational acceleration found on Earth: g = 9.8 m/s2.

*September 27, 2013 by sofia*

**math**

Please explain to work this: A rocket is launched from atop a 105-foot cliff with an initial velocity of 156ft/s. the height of the rocket above the ground at time t is given by h= -16t^2 + 156t + 105. When will the rocket hit the ground after it is launched? Round to the ...

*April 13, 2012 by Mary*

**science**

A mass m=5.2 kg is attached to the end of a spring with a spring constant of k=15.6 N/m. The mass moves through a viscous damping medium with a damping constant b=1.8 kg/s giving a velocity dependent damping force Fdamp= -bv. The motion occurs in zero gravity so set the force ...

*July 23, 2014 by help*

**math**

if you have 3 rows and three columns and you have to find the hidden numbers. each number is less than 100,the sum of the digits of each number in column 2 is 10,the sum of the numbers in column 1 is 30,row 1 contains odd multiples of 7,the sum of the digits of each number in ...

*May 19, 2010 by corrie*

**Chemistry**

Why should a mixture to be separated by column chromatography be introduced onto the column in a minimum amount of solvent?

*February 11, 2015 by Ryan*

**Anti-Derivatives**

A stone is dropped from the edge of a roof, and hits the ground with a velocity of −170 feet per second. Assume the acceleration due to gravity is -32 feet per second squared. How high (in feet) is the roof? I have found s which is 16^2 but I do not know what formula to ...

*April 24, 2016 by Anonymous*

**Physics**

a) Calculate the acceleration due to gravity on the planet Mars. I found this to be about 3.7 m/sec^2 b) What would your weight be on the planet Mars if you weighed 130 lbs? c) If you could jump vertically 5 ft on earth, how high would you be able to jump on mars? I'm just ...

*October 6, 2016 by Evette*

**Physics Classical Mechanics`**

A wheel in the shape of a uniform disk of radius R and mass mp is mounted on a frictionless horizontal axis. The wheel has moment of inertia about the center of mass Icm=(1/2)mpR2 . A massless cord is wrapped around the wheel and one end of the cord is attached to an object of...

*November 14, 2013 by Anonymous*

**Physics**

Urgent. A density bottle weigh 0.25 when empty and 0. 75 when. Filled with water and 0.65N when filled with alcohol calculate the volume of water,the density of alcohol. Take density of water=1000kg/m3 acceleration due to gravity= 10m/s

*May 13, 2016 by Adam*

**PHYSICS**

An aeroplane makes in emergency landing without landing gear. If the aeroplane touches down with a horizontal speed of 60.0ms^-1 and the coefficient of friction for aluminium on asphalt is μ = 0.500, how far will the aeroplane slide before coming to rest? You may assume that ...

*November 5, 2016 by Steven*

**Physics**

please check these: 1. which of the following statements applies to the motion of a ball rising and then falling in free fall? I.The ball has constant acceleration as it moves upward. II.The ball has constant acceleration at the top of its path. III.The ball has constant ...

*January 31, 2009 by y912f*

**Physics**

A pendulum on earth swings with angular frequency ω. On an unknown planet, it swings with angular frequency ω /2. The acceleration due to gravity on this planet is A) 4g B) 2g C) g/2 D) g/4 I think it is C but I am not sure...

*November 12, 2014 by Ming*

**gc chemistry - retention time**

adjusted retention time is the time a species spends in the stationary phase. its the total time it takes the species to elute minus the time it takes for an unretained species to elute. corrected retention data accounts for the change in pressure from the head of the column ...

*October 11, 2013 by Instrumental*

**PHYSICS LEC**

please help...i need this immediately.. rolling friction. two bicycles are set rolling with the same initial speed of 3.50m/s on a long, straight road, and the distance each travels before its speed is reduced by half is measured. One tire is inflated to a pressure of 40psi ...

*August 16, 2010 by josh*

**Physics**

The front 1.20 m of a 1550 kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 26.0 m/s stops uniformly in 1.20 m, how long does the collision last? cannot_evaluate s (b) What is the magnitude of the average force on...

*December 9, 2010 by Brittany*

**Chem6**

A solution contains naphthalene dissolved in hexane at a concentration of 10.40% naphthalene by mass. Calculate the vapor pressure of hexane above the solution, given that the vapor pressure of pure hexane at this temperature is 151 torr.

*May 2, 2011 by Ryan*

**Physics**

Calculate the pressure exerted by 75 cms of vertical length of a water column in SI units. Options: A. 7390Pa. B. 7560Pa. C. 7250Pa. D. 7350Pa.

*November 5, 2015 by G. Samuel Frank*

**Physics**

Compressed air is used to fire a 41.0 g ball vertically upward from a 1.0-m-tall tube. The air exerts an upward force of 3.7 N on the ball as long as it is in the tube. How high (in m) does the ball go above the top of the tube, assuming that the acceleration due to gravity is...

*October 10, 2011 by Dan*

**Physics Magnetic Field**

In an experiment on the shuttle, an electron with a speed of 6.3 x 105 m/s [N] and a mass of 9.11 x 10-31 kg is shot through an external magnetic field. Determine the strength and orientation of the magnetic field required so that the electron's direction of travel remains ...

*March 16, 2016 by Matt Damon*

**physics**

A mass of 20 kg on a plane inclined at 40 degrees. A string attached to that mass goes up the plane, passed over a pullley and is attached to mass of 30 kg that hangs verticalyy. a) find the acceleration and it's dirction b) the tension in the string. Assume no friction. I ...

*November 20, 2006 by Benji*

**Physics**

An arrow is shot straight up from the edge of a cliff with an initial velocity of 50 ft/s. Answer the following questions using English units. The acceleration due to gravity has a magnitude of 32.2 ft/s. A. Find the time to reach the highest point. B. Find the displacement at...

*August 21, 2016 by Maggie*

**Physics**

The system starts at rest. A mass of 20kg (m1) is connected to a pulley of uniform mass m=5kg and radius 10cm and a mass of 30kg (m2) hangs on the other side of the pulley hanging 2m above the ledge Find the tension of the strings I tried to find the acceleration by finding ...

*September 21, 2016 by Maddi*

**Physics(URGENT!!!!)**

A ruler stands vertically against a wall. It is given a tiny impulse at Î¸=0âˆ˜ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that Ï‰(Î¸=0âˆ˜)=0. The ruler has mass m= 100 g and...

*December 9, 2013 by keitanako*

**math 6 rule pattern**

The same rule is used on each of these number column A to get the numbers in Column B. COlumn A B -3 -5 0 1 3 3 6 13 Which could be the rule? Multiply by 2, then add 1 add 1 Subtract 2 Multiply by 3, then add 4 I picked that last one, But I know I am wrong. Help?

*May 21, 2014 by moby*

**Physics**

How would I approach this problem? What formula would I use to answer each part? Thank you in advance for any guidance... As part of the launch of the space shuttle, solid-rocket boosters (SRBs) first take it to an altitude of 45.0 km while they accelerate it to a speed of ...

*September 19, 2010 by .*

**organic chemistry**

how do the flow rate of the carrier gas and the column temperature affect the retention time of a cocompound on a GC column

*October 23, 2012 by lyly*

**phyisics**

A computer to be used in a satellite must be able to withstand accelerations of up to 23 times the acceleration due to gravity. In a test to see if it meets this specification, the computer is bolted to a frame that is vibrated back and forth in simple harmonic motion at a ...

*November 15, 2011 by christi*

**physics**

A fire helicopter carries a 565 kg bucket at the end of a 16.7 m long cable. When the helicopter is returning from a fire at a constant speed of 22.5 m/s, the cable makes an angle of 20.5 ◦ with respect to the vertical. Find the horizontal force exerted by air resistance...

*December 3, 2014 by Anonymous*

**Science**

To what temperature must a given mass of Nitrogen at zero degree celsius be heated to double its volume and pressure?

*February 12, 2017 by Gladys*

**chemistry**

to what temperature must a given mass of nitrogen at zero degree be heated so that both it volume and pressure will be doubled

*April 22, 2016 by YUZARSIF*

**physics**

A weight (with a mass of 71 kg) is suspended from a point near the right-hand end of a uni- form boom with a mass of 51 kg . To support the uniform boom a cable runs from this same point to a wall Vertical Height (m) is 7 Horizontal Distance (m) 6 and by a pivot on the same ...

*November 8, 2011 by Marti*

**Physics (Online w/ no teacher)**

The mass of a certain neutron star is 3.0 X 10 to the 30th (1.5 solar masses) and its radius is 8,000 m (8 km). What is the acceleration of gravity at the surface of this condensed, burned-out star? My answer was 31,265,625 X 10 to the 12th km/s squared.

*October 27, 2008 by Katie*

**physics**

Here's a neat trick. If your average ceramic bowl has a mass of 200 g, what is the difference in Newtons between the weight of the bowls on the top of her head before and after she does the trick? Details and assumptions The acceleration of gravity is −9.8 m/s2.

*April 29, 2013 by ianian*

**physics**

An amusement park ride consists of a rotating circular platform 8.09 m in diameter from which 10 kg seats are suspended at the end of 2.19 m mass less chains. When the system rotates, the chains make an angle of 14.8 ◦ with the vertical. The acceleration of gravity is 9....

*December 9, 2014 by Anonymous*

**chemistry**

What are the parameters of a sample of gas that are all interrelated and affect each other when any one of them changes? A. Pressure, volume, number of moles, and temperature B. Shape, hardness, transparency, and odor C. Mass, density, color, volume, and pressure D. ...

*March 24, 2015 by Cortney*

**Physics**

I don't want an answer I would just like to know what equations to use to answer the questions. It's confusing me. i. imgur. com/6CouaRj .png An astronaut lands on an alien planet. He places a pendulum (L = 0.200 m) on the surface and sets it in simple harmonic motion, as ...

*May 20, 2014 by Armin*

**Physics**

The tension in a string from which a 5.4kg object is suspended in an elevator is equal to 53.02N. What is magnitude of the acceleration a of the elevator? The acceleration of gravity is 9.8 m/s^2

*February 15, 2012 by Ethan*

**Physics**

The tension in a string from which a 6 kg object is suspended in an elevator is equal to 61 N. What is magnitude of the acceleration a of the elevator? The acceleration of gravity is 9.8 m/s^2. Answer in units of m/s^2

*September 24, 2012 by sam*

**Pre-Calc**

Could someone please check these-I had tried one last night but it was really wrong so I'm been working-hopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x-10 =0 2x^2 + 5x-10+10=0+10 2x^2 + 5x = 10 2x^2 + 5x/2 = 10/2 2x^2...

*September 7, 2011 by Sheila*

**I need 2 fix these prob. b4 they get 2me on test!**

A father gives his son a ride by pulling a sled across the rough snow. The father runs across the snow with a constant acceleration while pulling the sled at F = 75.0 N, at 30 deg. above the horizontal. The combined mass the sled and son is 30.0 kg. The coefficient of kinetic ...

*February 20, 2007 by Matt (Newton's laws)*

**calculus 3**

A ball is thrown northward into the air from the origin in three dimensional space ( the xy plane is the ground, the positive y-axis points north, positive x-axis is east and the positive z – axis is height above the ground ). The initial velocity of the ball is V0 = < 0,...

*October 4, 2010 by cano*

**physics**

A certain force gives an object of mass m1 an acceleration of 13.0 m/s2 and an object of mass m2 an acceleration of 2.10 m/s2. What acceleration would the force give to an object of mass (a)m2 – m1 and (b)m2 + m1?

*October 9, 2010 by koraile*

**physics**

A 640 N student stands on a bathroom scale in an elebator. As the elevator starts moving, the scale reads 800 N. a) find the acceleration of the elevator (magnitude and direction) b) acceleration if the scale reads 450N? c) If the scale reads 0 should the student worry? ...

*November 16, 2006 by Christina*

**Geometry**

I'm not sure how to complete a two-column proof: Given <2=<4,m<2=100 Prove:m<3=70 All i have so far: <2=<4, m<2=100 : Given M<2 =m <4 :definition of congruent angles M<4=110 : ? M<3+m<4= 180 : ? M<3=70 : ? This is so stressful, please hep!

*November 2, 2015 by Amanda*

**physics**

whenever two Apollo astronauts were on the surface of the moon, a third astronaut orbited the moon, assume the orbit to be circular and 100 km above the surface of the moon, where the acceleration due to gravity is 1.52 m/s^2. the radius of the moon is 1.70* 10^6 m.(a) ...

*March 10, 2011 by Anonymous*