Thursday

October 2, 2014

October 2, 2014

Number of results: 52,053

**engineering**

A saturated soil sample under CU test was subjected to a confining pressure of 200 kPa with back pressure (pore pressure) of 50 kPa. What would be the value of pore pressure if the confining pressure was raised to 400 kPa without drainage? If the pore pressure parameter A is 0...
*December 4, 2013 by WYNN*

**Physics**

A ball is thrown vertically upward from the ground with a speed of 36.0 m/s.Suppose the acceleration of gravity were only 2.00 m/s^2 instead of 9.80 m/s^2 a)At what time does it have a velocity of 12.0 m/s upward? b)At what time does it have a velocity of 12.0 m/s downward? c)...
*September 6, 2014 by Celine*

**physics**

Here were two tricky questions. Please provide steps. Answers are not necessary (since these are practice questions for an exam). 1.) The centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in ...
*October 16, 2010 by jo*

**physics**

Here were two tricky questions. Please provide steps. Answers are not necessary (since these are practice questions for an exam). 1.) The centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in ...
*October 16, 2010 by jo*

**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*

**physics mc question!!!!HELP **

Question # 1 : It a particle increases its speed by a factor of 2, what happens to the kinetic energy? a)doubles b)cuts in half c)increases by a factor of 4 d)depends on whether or not work is done on the particle Question # 2: An object falling near the surface of the Earth a...
*May 22, 2012 by lilly*

**Physics please help !**

A Goodyear blimp typically contains 4770 m3 of helium (He) at an absolute pressure of 1.10 x 105 Pa. The temperature of the helium is 274 K. What is the mass (in kg) of the helium in the blimp? You asked this twice. See my response to your later post.
*December 1, 2006 by maysam*

**chemistry**

When a sample of carbon dioxide gas is at 36 degrees and 105 kpa is heated the new pressure of the gas becomes 165kpa. Determine the new temperature. Assume volume and amount of gas remain constant.
*January 15, 2012 by jo*

**Physics**

Need Help with physics! Two cars drive on a straight highway. At time t = 0, car 1 passes mile marker 0 traveling due east with a speed of 17.0 m/s. At the same time, car 2 is 1.3 km east of mile marker 0 traveling at 30.0 m/s due west. Car 1 is speeding up with an ...
*October 4, 2012 by Brandon*

**heat**

if the absolute pressure of a gas is 550.280 kPa, its gage pressure is ? A.101.325kPa b.277.280kPa c.448.955kPa d.651.605kPa Gauge pressure - atmosphericpressure=absolute pressure where atmospheric pressure varies, but standard atmospheric pressure is 101.325kPa NEED ANSWER ...
*July 15, 2005 by Andre*

**Physics**

A rocket is launched at an angle of 42◦ above the horizontal with an initial speed of 76 m/s. It moves for 9 s along its initial line of motion with an acceleration of 29 m/s^2. At this time its engines fail and the rocket proceeds to move as a projectile. The ...
*September 6, 2010 by John*

**chemistry**

How many moles of gas must be forced into a 3.1L ball to give it a gauge pressure of 9.8psi at 22degrees C? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.5psi so that the total pressure in the ball is 24.3psi .
*April 28, 2012 by Jess*

**chemistry**

How many moles of gas must be forced into a 3.7L ball to give it a gauge pressure of 8.4psi at 23degrees C? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.6psi so that the total pressure in the ball is 23.0psi
*April 28, 2012 by Jessica12*

**Physics**

1. The problem statement, all variables and given/known data A student pulls on a box up an incline of 10 degrees. The student pulls with a force of 180 N directed at 30 degrees above the line of the incline. The box has a mass of 28 kg, and the coefficient of friction between...
*October 7, 2007 by Tim*

**physics**

A car speed up from 18m/s to 34 m/s in 2 seconds A) find the cars acceleration must write down all given information and show the work B) What does this acceleration tell us about the motion of the car?
*May 3, 2012 by lisa*

**physics- TEST TMRW PLS HELP!**

In zero-gravity astronaut training and equipment testing, NASA flies a KC135A aircraft along a parabolic flight path. The aircraft climbs from 24 000 ft to 31 000 ft, where it enters the zero-g parabola with a velocity of 143 m/s nose high at 45.0° and exists with velocity 143...
*October 18, 2012 by Ania *

**physics**

Coasting due east on your bicycle at 8.0 m/s, you encounter a sandy patch of road 7.4 m across. When you leave the sandy patch your speed has been reduced to 5.5 m/s. Assuming the bicycle slows with constant acceleration, what was its acceleration in the sandy patch? Give both...
*September 16, 2013 by john*

**chemistry**

calculate the work performed if a balloon contracts from 12.32L to 422 ml due to an extermal pressure of 3.1 atm
*December 12, 2011 by saud*

**Chemistry**

How many moles of gas must be forced into a 4.8L tire to give it a gauge pressure of 30.8psi at 30 degrees celsius? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.5L so that the total pressure in the tire is 45.3psi. What formula...
*February 20, 2013 by Claire*

**physics 20 **

A speed velocity of a a rocket with a mass of 0.25 kg passes from 15 m/s[up] to 40 m/s[up] in 0.60s. calculate the force of the escaped gasses of the rocket. **** that's what i've done, so far data: m = 0.25kg initial velocity = 15 m/s final velocity = 40 m/s time = 0.60s ...
*November 3, 2009 by Adrienne *

**physics 20 **

A speed velocity of a a rocket with a mass of 0.25 kg passes from 15 m/s[up] to 40 m/s[up] in 0.60s. calculate the force of the escaped gasses of the rocket. **** that's what i've done, so far data: m = 0.25kg initial velocity = 15 m/s final velocity = 40 m/s time = 0.60s ...
*November 3, 2009 by Adrienne *

**college chem**

A mixture contains H2 at 600 torr pressure, N2 at 200 torr pressure and O2 at 300 pressure. what is the total pressure of the gases in the system?
*April 29, 2014 by ashley*

**Physics**

please check: 1. A piece of chalk is dropped by a teacher walking at a speed of 1.5 m/s. From the teacher's perspective, the chalk appears to fall. STRAIGHT DOWN 2. Which is the force of an acceleration? FORCE 3. A free-body diagram of a ball falling in the presence of air ...
*February 5, 2009 by y912f*

**Math IN URGENT NEED OF FEEDBACK**

If the temperature is constant, then the atmospheric pressure P (in pounds/square inch) varies with the altitude above sea level h in accordance with the law given below where p0 is the atmospheric pressure at sea level and k is a constant. P = p0e-kh If the atmospheric ...
*April 13, 2011 by Anonymous*

**AP Physics**

Three blocks of masses 8.2 kg, 5.88 kg, and 2.19 kg are connected by light strings that pass over frictionless pulleys as shown in the ﬁgure. The acceleration of the 5.88 kg block is 2.18 m/s 2 to the left and the surfaces are rough. The acceleration of gravity is 9.8 m...
*February 5, 2012 by .*

**Physics**

For each of the following scenarios, indicate whether the oscillation period of the pendulum becomes shorter, longer or remains unchanged. Note: you must clearly mark your answer (for example, highlight it in red) from the multiple-choice list below and you must provide an ...
*July 10, 2013 by Anonymous*

**physics**

A battleship simultaneously fires two shells toward two identical enemy ships. One shell hits ship A, which is close by, and the other hits ship B, which is farther away. The two shells are fired at the same speed. Assume that air resistance is negligible and that the ...
*January 30, 2011 by Tess*

**physic**

Given: Compressor speed is 1500rpm. The compressor has a bore of 3.125 in, a stroke of 3.26in and a connecting rod crank ratio to 3.5. Inlet pressure is atmospheric 14.7 psia, peak cylinder pressure is 132psia, and mean active pressure mep is 26psia. Flow is 8.9 cfm at mep, ...
*August 12, 2012 by zenden*

**physics**

On take off, the combined action of the engines and wings of an airplane exerts a(n) 7767 N force on the plane,directed upward at an angle of 59.1 degrees above the horizontal. The plane rises with constant velocity in the vertical direction while continuing to accelerate in ...
*July 12, 2011 by alexa*

**precalculus**

write each expression as the sine, cosine or tangent of a double angle. then find the exact value of the expression. a. 2sin 22.5 cos 22.5 b. cos^2 105- sin^2 105
*July 6, 2012 by ama*

**math**

surface area of a rightcircular cylinder. The area of a right circular cylinder is given by the polynomial 2pierh^2 where h is the height and r is the radius of the base. Suppose that a beverage can has a height of 6.2 inches and a radius of 1.3 inches. Evaluate the polynomial...
*March 22, 2013 by pam*

**math**

Jack's yard is a rectangle 105 feet by 212 feet. Using front-end estimation on the dimensions, what is an estimate of the area of this yard?
*February 29, 2012 by kl*

**physics**

The current in a lightning bolt is 1.6 105 A. How many coulombs of charge pass through a cross-sectional area of the lightning bolt in 0.70 s? I dont know how to set this up???
*May 16, 2012 by Brianna*

**Physics**

A rock is thrown directly upward from the edge of a flat roof of a building that is 56.3 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown. Take the acceleration due to gravity to have magnitude and ...
*May 27, 2014 by Alex*

**science**

a .17 kg ball of dough is thrown straight up into the air with an initial speed of 12 m/s. The acceleration of gravity is 9.81 m/s^2. What is its momentum halfway to its maximum height on the way up?
*January 10, 2010 by jen*

**physics**

A 7 kg block slides on a horizontal frictionless surface with a speed of 1.2 m/s. It is brought momentarily to rest when it hits a bumper that compresses a spring. The acceleration of gravity is 9.8 m/s^2.
*November 17, 2010 by Jeann*

**Physics**

A 0.2 kg object that stretches a spring 6.5 cm from its natural length when hanging at rest oscillates with an amplitude of 1.5 cm. The acceleration of gravity is 9.81 m/s2. Find the total energy of the system.
*November 21, 2010 by Mark*

**physics**

In a distant planet, a freely falling object gains speed at a steady rate of 25 m/s during each 1.2 seconds of fall. The gravity acceleration there is: 122 m/s2 0.05 m/s2 30 m/s2 22 m/s2 5 m/s2 20.8 m/s2
*February 13, 2011 by Anonymous*

**physics**

A football is thrown upward at a(n) 37 angle to the horizontal. The acceleration of gravity is 9.8 m/s2 . To throw a(n) 57.8 m pass, what must be the initial speed of the ball? Answer in units of m/s
*September 11, 2011 by Bethany*

**physics**

A ball is thrown vertically upward with a speed of 27.3 m/s from a height of 2.1 m. How long does it take to reach its highest point? The acceleration of gravity is 9.81 m/s2. Answer in units of s
*October 10, 2011 by Anonymous*

**physics**

A ball is thrown upward.What is its maximum height? Its initial vertical speed is 11.5 m/s and the acceleration of gravity is 9.8 m/s2 . Neglect air resistance. Answer in units of m
*October 16, 2011 by asdfghjkl*

**physics**

During a baseball game, a batter hits a pop- up to a fielder 78 m away. The acceleration of gravity is 9.8 m/s2 . If the ball remains in the air for 5.8 s, how high does it rise?
*October 20, 2011 by matt*

**physics**

A beautiful man with a large nose named Melvin lifts a 28.1 kg bucket from a well anddoes 4.24 kJ of work. The acceleration of gravity is 9.8 m/s2 . How deep is the well? Answer in units of m
*October 26, 2011 by lynn*

**physics**

a ball is thrown upward what is its maximun height? its initial vertical speed is 8.1 m/s and the acceleration of gravity is 9.8 m/s . neglet air resistance . answer in units of m
*September 14, 2012 by fabiola*

**Physic**

A ball is thrown upward. What is its initial vertical speed? The acceleration of gravity is 9.8 m/s^2 and maximum height is 7.2 m,. Neglect air resistance. Answer in units of m/s
*October 1, 2012 by Patrick*

**physics**

A ball is thrown vertically upward with a speed of 24.7 m/s from a height of 2.0 m. How long does it take to reach its highest point? The acceleration of gravity is 9.81 m/s 2 . Answer in units of s
*October 9, 2012 by Anonymous*

**physics**

A ball is thrown vertically upward with a speed of 24.7 m/s from a height of 2.0 m. How long does it take to reach its highest point? The acceleration of gravity is 9.81 m/s 2 . Answer in units of s
*October 9, 2012 by Anonymous*

**Physics**

A ball is thrown vertically upward with a speed of 26.1 m/s from a height of 2.1 m.How long does it take to reach its highest point? The acceleration of gravity is 9.81 m/s2. Answer in units of s
*November 11, 2012 by Jacky*

**physics**

An object is projected upward from the surface of the earth with an initial speed of 2 km/s. The acceleration of gravity is 9.81 m/s^2. Find the maximum height it reaches. Answer in units of km.
*November 30, 2012 by michelle*

**physics**

A 224 g particle is released from rest at point A along the diameter on the inside of a fric- tionless, hemispherical bowl of radius 44 cm. The acceleration of gravity is 9.8 m/s2 .
*December 14, 2012 by Richard*

**Physics**

(a)Assuming that only gravity is acting on it, how far does an electron have to be from a proton so that its acceleration is the same as that of a freely falling object at the Earth’s surface? (b)Suppose the Earth were made up only of protons but had the same size and mass it ...
*July 29, 2010 by Brian *

**Chemistry**

43. List and describe three factors that influence solubility: (Source-wikipedia) The solubility of a given solute in a given solvent typically depends on temperature. For many solids dissolved in liquid water, the solubility increases with temperature up to 100 °C. In liquid ...
*November 1, 2010 by mysterychicken*

**physics**

A model rocket is launched straight upward with an initial speed of 51.6 m/s. It accelerates with a constant upward acceleration of 1.96 m/s2 until its engines stop at an altitude of 230 m. What is the maximum height reached by the rocket? The acceleration of gravity is 9.81 m...
*October 12, 2011 by a*

**Chemistry**

I really don't get this. The calculations shown don't make sense. Demonstrate that work is not a state function by calculating the work involved in expanding a gas from an initial state of 1.00: and 10.0atm of pressure to (a) 10,0 L and 1.0 atm pressure. (b) 5.00L and 2.00 atm...
*November 28, 2008 by Xi*

**Physics**

Suppose a space capsule with an astronaut inside is launched from the top of a tower at some angle above the horizontal. a)While the capsule is in free fall, what are the acceleration of the astronaut and the capsule? b)If the astronaut measures his acceleration compared with ...
*September 6, 2011 by Anonymous*

**physic**

How far (in meters) above the earth's surface will the acceleration of gravity be 27.0 % of what it is on the surface?
*March 12, 2012 by coleman*

**Physics**

An ideal gas at 18.0 °C and a pressure of 2.83 x 105 Pa occupies a volume of 2.63 m3. (a) How many moles of gas are present? (b) If the volume is raised to 5.09 m3 and the temperature raised to 31.6 °C, what will be the pressure of the gas? If N is the number of molecules then...
*December 1, 2006 by maysam*

**physics**

Light-rail passenger trains that provide transportation within and between cities are capable of modest accelerations. The magnitude of the maximum acceleration is typically 1.3 {\rm m}/{\rm s}^{2}, but the driver will usually maintain a constant acceleration that is less than...
*September 14, 2012 by kaitlyn*

**Physics**

An arrow is shot at an angle 36 of with the horizontal. It has a velocity of 47 m/s. How high will the arrow go? The acceleration of gravity is 9.8 m/s
*November 4, 2012 by ferras*

**physics**

a baseball has a mass of .145 kilograms. If the acceleration die to gravity is 9.8m/s, what is the weight of the baseball
*December 10, 2012 by Darfrell*

**Physics**

On an unknown planet, a pendulum of length 1.5 m swings with a period of 3.3 s. What is the acceleration of gravity on this planet?
*January 30, 2014 by Rachell*

**physics**

A firefighter of mass 120 kg slides down a vertical pole with an acceleration of 4 m/s per second. What is the friction force that acts on the firefighters? In this case, the friction force is the force that is acting against gravity. Use F=M*a If g=9.8m/s^2 and the ...
*September 20, 2006 by kelly*

**chemistry**

If you are given .060m. sugar (glucose-C6H12O6), .030m. AlCl3 and .025m. NaOH. How do you figur out lowest boiling point and lowest vapor pressure of the given solutions?
*February 23, 2009 by Aimee*

**poiseuille's law**

GIVEN: L = 3.0 cm = 0.03 m r = 0.3 mm = 0.0003 m (delta) y = 1.0 m 1 pint = 500 cm^3 [approx.] given a) Find the rate of flow, F = ? b) How long will it taken to inject 1 point of blood, t = ? a & b) I know we need to find the pressure or speed. F = (P at) (A) = (P at ) (pie...
*November 26, 2013 by Sarah*

**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*

**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*

**speed of rocket**

how fast does a rocket need to go to break earth's gravitationl pull The final rocket velocity required to maintain a circular orbit around the Earth may be computed from the following: Vc = sqrt(Âµ/r) where Vc is the circular orbital velocity in feet per second, Âµ (...
*August 25, 2005 by britt*

**Physics-Mechaincs**

The suspended 2.29 kg mass on the right is moving up, the 1.3 kg mass slides down the ramp, and the suspended 7.7 kg mass on the left is moving down. There is friction between the block and the ramp. u=0.15 The acceleration of gravity is 9.8 m/s2 . The pulleys are massless and...
*September 24, 2010 by Genevieve*

**physics**

The National Aeronautics and Space Administration (NASA) studies the physiological effects of large accelerations on astronauts. Some of these studies use a machine known as a centrifuge. This machine consists of a long arm, to one end of which is attached a chamber in which ...
*November 7, 2012 by D*

**Gen chem 2**

calculate the work performed if a balloon contracts from11.75 L to 806 mL due to an external pressure of 3.9 atm.
*November 6, 2013 by Stacey*

**Physics**

Realizing that she often doesn't have her students' full attention during class, a professor devises an elaborate device on which to stand while she lectures. The pulley is placed so that the string makes a 45.0-degree angle with the beam. The beam is uniform, 5.00 meters long...
*January 5, 2012 by Daniel*

**Pysics**

Realizing that she often doesn't have her students' full attention during class, a professor devises an elaborate device on which to stand while she lectures. The pulley is placed so that the string makes a 45.0-degree angle with the beam. The beam is uniform, 5.00 meters long...
*January 5, 2012 by Daniel*

**Physics**

Use the PV diagram of a system. The units for P and V are atmospheric pressure atm and liter L. Process A to B and B to C are straight lines on it. How much is the work done by the system from A to C in J? Given these coordinates:(volume on the x, pressure on the y) A: (1 Li, ...
*July 30, 2013 by Andrew Katz*

**Physics**

2 moles of ideal gas are in a cylinder container with cross-sectional area 1*10^-2 m^3. Cylinder is fitted with a light, movable piston that is open to atmosphere, where pressure is 10^-5 PA.A 50KG MASS PLACED ON PISTON KEEPS IT IN mechanical equilibrium when temperature is ...
*January 13, 2011 by Grace*

**physics, buoyance**

Water flows at a rate of 25L/min through a horizontal 8.0-cm-diameter pipe under a pressure of 5.7Pa . At one point, calcium deposits reduce the cross-sectional area of the pipe to 40cm2 . Part A What is the pressure at this point? (Consider the water to be an ideal fluid.)
*December 5, 2013 by HELP!!!!!!!!!!!*

**physics**

A spinning flywheel has rotational inertia I = 402.9 kgm2. Its angular velocity decreases from 20.3 rad/s to zero in 266.6 s due to friction. What is the frictional torque acting? Torque= MomentofInertia*angularacceleration. You are given the moment of inertia (you named it ...
*October 23, 2006 by Anonymous*

**algebra help please**

The area of a rectangle of length x is given by 3x^2+5x find the width of the rectangle a=l*w =x*(3x+5) I stoped here I am not sure if I am correct i was taken the 3x+5 as the width and x as the length but i am not sure if the 3x+5 should be the area and divid by x the length ...
*April 24, 2007 by larry*

**physics**

A 5.6 kg bag of groceries is in equilibrium on an incline of 32. The acceleration of gravity is 9.81 m/s2 . What is the magnitude of the normal force on the bag?
*September 25, 2011 by newtothis*

**geometry**

A farmer has 30yd of fencing and wants to enclose an area beside his barn. What are the dimensions of the region of maximal area, and what is that maximal area if the region is an is isosceles triangle with its base along side of the barn. Given -> legs of length 15, x = 1/...
*December 13, 2011 by david*

**Math**

a boat starts at point A, moves 3km due north, then 2 km due east, then 1 km due south, and then 4 km due east to point b. Find the distance AB
*December 11, 2010 by Anonymous*

**Physics**

To supply the plumbing system of a New York office building, water needs to be pumped to a tank on the roof, where its height will provide a "head" of pressure for all the floors. The vertical height between the basement pump and the level of the water in the tank is 95.3 m. ...
*June 15, 2012 by Steven*

**Science**

What is an area without pressure called?
*October 27, 2010 by Shannon*

**physics**

Calculate pressure if force is 5N in an area of 1m.sq.
*February 18, 2011 by Anonymous*

**Geometry**

What is the ratio of the area of triangle XBY to the area of triangle ABC for the given measuremnts, if XYis similar to AC, and BY=2 and BC=4?
*May 17, 2010 by Kaley *

**math**

What is the ratio of the area of triangle XBY to the area of triangle ABC for the given measuremnts, if XYis similar to AC, and BY=2 and BC=4?
*May 18, 2010 by buggy*

**geometry**

The area of a rectangle is given by A = x2 + 4x – 5. Find the value of x if the total area of the rectangle is equal to 7 square units.
*January 23, 2011 by Anonymous*

**Geometry**

Find the area of the regular polygon with the given radius. Radius: 6cm. Area= apothem x perimeter/ 2
*March 19, 2012 by Ashley*

**Geometry**

Find the area of the regular polygon with the given radius. The radius of the square is 6 cm. area= apothem x perimeter/ 2
*March 19, 2012 by Anonymous*

**Geometry **

Find the area of the regular polygon with the given radius. The radius of the square is 6 cm. area= apothem x perimeter/ 2
*March 19, 2012 by Anonymous*

**PHYSICS**

Particles 1 and 2, each of mass m, are attached to the ends of a rigid massless rod of length L1 + L2, with L1 = 19 cm and L2 = 75 cm. The rod is held horizontally on the fulcrum and then released. What is the magnitude of the initial acceleration of particle 1? What is the ...
*March 24, 2007 by Calvin*

**math **

ben and glen are practicing short golf shots. they are aiming for a flag that is 110 yards away? they consider any shot between 105 and 115 yards to be accurate. here are their results in yards. ben: 110,130,88,105,108,110,118,100,120,103.and Glen: 95,105,108,110,106,110,108,...
*January 6, 2012 by theresa*

**physics**

A bullet is fired straight up from a gun with a muzzle velocity of 170 m/s. Neglecting air resistance, what will be its displacement after 5.8 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m.
*March 22, 2011 by maria*

**physics**

A bullet is fired straight up from a gun with a muzzle velocity of 170 m/s. Neglecting air resistance, what will be its displacement after 5.8 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m.
*March 22, 2011 by maria*

**Physics**

A pulley system has an efficiency of 78.0 per- cent. The acceleration of gravity is 9.81 m/s2 . How much of the rope must be pulled in if a force of 469 N is needed to lift a 52 kg desk 2.78 m?
*March 23, 2011 by McCaleb*

**physics**

A football is thrown upward at a(n) 23◦ angleto the horizontal. The acceleration of gravity is 9.8 m/s To throw a(n) 52 m pass, what must be the initial speed of the ball? Answer in units of m/s
*September 10, 2011 by Anonymous*

**physics**

A ball is thrown vertically upward with a speed of 27.9 m/s from a height of 1.9 m. How long does it take to reach its high- est point? The acceleration of gravity is 9.81 m/s2. Answer in units of s
*September 28, 2011 by rc*

**physics**

During a baseball game, a batter hits a popup to a ﬁelder 81 m away. The acceleration of gravity is 9.8 m/s 2 . If the ball remains in the air for 6.7 s, how high does it rise?
*October 21, 2011 by Anonymous*

**physics**

A cheerleader lifts his 62.2 kg partner straight up oﬀ the ground a distance of 0.89 m before releasing her. The acceleration of gravity is 9.8 m/s 2 . If he does this 19 times, how much work has he done? Answer in units of J
*September 27, 2012 by LYNN*

**physics**

A 0.13 kg ball of dough is thrown straight up into the air with an initial speed of 18 m/s. The acceleration of gravity is 9.81 m/s2 .What is its momentum halfway to its max- imum height on the way up?
*February 24, 2014 by chris*

**physics**

A bullet is fired straight up from a gun with a muzzle velocity of 225 m/s. Neglecting air resistance, what will be its displacement after 6.1 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m
*September 24, 2014 by ashlie*

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