Wednesday

September 28, 2016
**Physics HELP**

When the pressure P of a fixed mass of gas is inversely proportional to its volume V at constant temperature. (Where mass and temperature are constant) When volume is increased, the distance between the walls of the container is ?. This causes the average time between each ...

*Sunday, June 5, 2016 by Timu*

**Physics I (Classical)**

A flat go-kart track consists of two straightways 100 m long with semicircular ends which have a radius of 25.0 m. A go-kart executes the curved end with a constant tangential acceleration while slowing from 12.4 m/s to 5.9 m/s. Determine the magnitude of the total ...

*Sunday, June 5, 2016 by Victoria*

**Physics I (Classical)**

At some instant, a particle traveling in a horizontal circular path of radius 7.50 m has a total acceleration with a magnitude of 16.0 m/s^2 and a constant tangential acceleration of 12.0 m/s^2. Determine the speed of the particle at this instant and (1/8) revolution later.

*Sunday, June 5, 2016 by Victoria*

**Physics I (Classical)**

At some instant, a particle traveling in a horizontal circular path of radius 7.50 m has a total acceleration with a magnitude of 16.0 m/s^2 and a constant tangential acceleration of 12.0 m/s^2. Determine the speed of the particle at this instant and (1/8) revolution later. I...

*Sunday, June 5, 2016 by Victoria*

**Physics I (Classical)**

At some instant, a particle traveling in a horizontal circular path of radius 7.50 m has a total acceleration with a magnitude of 16.0 m/s2 and a constant tangential acceleration of 12.0 m/s2. Determine the speed of the particle at this instant and (1/8) revolution later. I ...

*Sunday, June 5, 2016 by Victoria*

**Physics**

A car travelling at 90 km/hr sounds it horn as it approaches a stationary cyclist.if the car horn is at 512 Hz and temperature of air is 10 degree centigrade, what is the frequency of the sound waves reaching the cyclist as car approaches.

*Sunday, June 5, 2016 by Allen*

**physics**

The x component of a vector A is -96.0 m and the y component is +29.0 m. What is the angle between the direction of A and the positive direction of x?

*Sunday, June 5, 2016 by PLZ HELPPPP*

**physics**

a motor car accelerates for 10seconds to attain a velocity of 20m/s2 . it continues with uniform velocity for a further 20seconds and then decelerates so that it steps in 20seconds. calculate the acceleration and deceleration?

*Sunday, June 5, 2016 by Able*

**physics**

a stone is projected upwards at an angle of 30 degree to the horizontal from the top of a tower 100m and it hits the ground at a point Q. If the initial velocity of projection is 100m/s2.calculate the maximum height of the stone above the ground

*Sunday, June 5, 2016 by Able*

**PHYSICS**

A FORCE OF 40N IS Applied at the end of wire 4m long and produced an extention of 0.24mm if the diameter of wire is 2.00mm.calculate stress on wire and strain in the wire

*Sunday, June 5, 2016 by ESTHER*

**Physics**

Swimming at 3.00 m/s relative to still water, a swimmer heads directly across a river of width 80 m. He arrives 50 m downstream from the point directly across the river from his starting point. (a) What is the speed of the current in the river? (b) At what angle relative to ...

*Sunday, June 5, 2016 by Ryan Tye*

**Physics**

Find the longest wavelength by resonating air in 20 cm tube which is opened both ends

*Sunday, June 5, 2016 by Ali*

**physics**

A 0.02kg bullet is fired at a 3.5kg block which is initially at resr on a table. The bullet embeds in the block. Friction converts the 24.02J of kinetic energy to heat and brings the block and bullet system to stop. How fast was the bullet and block system sliding immediately ...

*Sunday, June 5, 2016 by ChrismB*

**physics**

A marine siren consists of a cylinder 72 cm in length closed at one end.for sound through air at 336 m/s. find the lowest frequency of the siren

*Saturday, June 4, 2016 by omar*

**physics**

A car is travelling at 20m/s along a road. A child runs out into the road 50m ahead and the car driver steps on the brake pedal. What must the car's declerations be if the car is to slop just before it reaches the child .

*Saturday, June 4, 2016 by sumit*

**Physics**

An arrow has an initial launch speed of 39 m/s. If it must strike a target 39 m away at the same elevation, what should be the projection angle?(Hint: sin2θ = 2sinθcosθ)

*Saturday, June 4, 2016 by Neal parikh*

**Physics**

A pitcher throws horizontally a fast ball at 156 km/h toward the home plate, which is 18.2 m away. Neglecting air resistance (not a good idea if you are the batter), find how far the ball drops because of gravity by the time it reaches the home plate.

*Saturday, June 4, 2016 by Neal parikh*

**Physics**

A ball is thrown vertically upward from the edge of a bridge 29.0 m high with an initial speed of 20.0 m/s. The ball falls all the way down and strikes the water below. Determine the time it takes the ball to strike the water.

*Saturday, June 4, 2016 by Neal parikh*

**PHYSICS**

Explain the statement the capacitance of a capacitor is 5microfarads

*Saturday, June 4, 2016 by KENNEDY*

**physics**

what is the frequency of unknown fork if 8 beats in 8 seconds are heard with each fork

*Saturday, June 4, 2016 by john*

**physics**

What is the formula to calculate the height of fluid in cylinder if the volume of fluid is known, and the length and diameter of cylinder is known? Kindly help please!

*Saturday, June 4, 2016 by ChrismB*

**Physics**

This is a theoretical question, ignore the numbers. A 205-kg log is pulled up and to the right on a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0 degrees with respect to the horizontal. The coefficient of kinetic friction ...

*Saturday, June 4, 2016 by Anonymous*

**Physics**

A man with a mass(mm) of 71.9 kg stands up in a 95-kg canoe(mc) of length(l) 4.00 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How far ...

*Saturday, June 4, 2016 by Madison*

**physics**

A ball of mass 0.1 kg, initially at rest, is dropped from height of 1 m. Ball hits the ground and bounces off the ground. Upon impact with the ground, its velocity reduces by 20%. The height (in m) to which the ball will rise is:

*Saturday, June 4, 2016 by Gulab*

**physics**

A 0.02kg bullet is fired at a 3.5kg block which is initially at rest on a table. The bullet embeds in the block. Friction converts the 24.02J of kinetic energy to heat and brings the block and bullet system to stop. How fast was the bullet and block system sliding immediately ...

*Saturday, June 4, 2016 by ChrismB*

**Physics I (Classical)**

Determine the magnitude of the centripetal acceleration of an object on the surface of the Earth at a latitude of 71.6°. Consider the Earth to be a sphere of radius R = 6.38 ✕ 106 m.

*Friday, June 3, 2016 by Victoria*

**Physics I (Classical)**

Three students have been studying relative motion and decide to do an experiment to demonstrate their knowledge. The experiment plan calls for Jane to drive her pickup in a straight line across the parking lot at a constant speed of 11.2 m/s. Fred is in the back of the truck ...

*Friday, June 3, 2016 by Victoria*

**Physics**

You are lying on the bottom of a swimming pool filled 15 ft deep with water (ftwater = 1.33). What is the diameter of the "hole” at the water surface through which you can see out of the pool?

*Friday, June 3, 2016 by ?*

**Physics**

An jet flies between two points on the ground that are 500 km apart with an airspeed of 200 m/s. The destination is directly north of the point of origin of the flight.. If a constant wind blows at 10 m/s toward the west during the flight, what direction must the plane fly ...

*Friday, June 3, 2016 by Damien Deninson*

**Physics**

An helicopter flies in a strange pattern, all at the same altitude of 5 km: 1) it flies 29 km in a direction 30.0° east of north, 2) it flies 20 km due south, and 3) it flies 10 km in a direction 30.0° north of west. How far did the helicopter end up from its starting ...

*Friday, June 3, 2016 by Damien Deninson*

**Physics**

An ant crawls 23 m to the north, then turns 30° towards the right and crawls another 23 m. Determine the direction of the ant's displacement vector, expressed as an angle relative to east.

*Friday, June 3, 2016 by Damien Deninson*

**physics**

what is the maximum possible value of static friction?

*Friday, June 3, 2016 by JOSEPH GURTI*

**PHYSICS**

Pressure at the bottom doesnot depdnd on..

*Friday, June 3, 2016 by GIFT*

**Physics **

A body travels a distance of 2m in 2s. 2.8m in next 4sec.What will be speed of body in 10th second of its journey.

*Friday, June 3, 2016 by Anonymous*

**physics**

An aluminum plate of mass 0.1 kg at 95oC is immersed in 0.5 litre of water at 20oC kept inside an insulating container and is then removed. If the temperature of the water is found to be 23oC, then the temperature of the aluminum plate is ___________ oC. (The specific heat of ...

*Thursday, June 2, 2016 by Rohan*

**physics**

A ladder leans against a slick wall (zero friction) with the foot of the ladder on level ground with a coefficient of friction of 0.06. The greatest angle from the vertical possible without the ladder slipping is: ? how would I set up this problem?

*Thursday, June 2, 2016 by Asykes*

**Physics - Doppler Effect**

How fast is a car moving and in what direction if the frequency of the horn drops from 900 Hz to 875 Hz, as heard by a stationary listener? The air temperature is 0oC. How to solve? I have no idea...

*Thursday, June 2, 2016 by lost in life*

**Physics**

Two sound waves are traveling through a container of unknown gas. Wave A has a wavelength of 1.2 m. Wave B has a wavelength of 3.6 m. The frequency of wave B must be __________ the frequency of wave A. a. one-ninth b. one-third c. the same as d. three times larger than the ...

*Thursday, June 2, 2016 by lost in life*

**Physics**

Unit 7 Heat And Temperature

*Thursday, June 2, 2016 by Kibru Kassa*

**physics**

an initially resting 300g car is dragged along a horizontal frictionless table by a massless cord. The cord is attached to vertically hanging 60g mass by a frictionless massless pulley. If the car starts from rest, determine the time it would take for it to move 20 cm.

*Thursday, June 2, 2016 by Bill*

**Physics **

A 580-g squirrel with a surface area of 855 cm2 falls from a 5.2-m tree to the ground. Estimate its terminal velocity. (Use the drag coefficient for a horizontal skydiver. Assume that the cross-sectional area of the squirrel can be approximated as a rectangle of width 11.1 cm ...

*Wednesday, June 1, 2016 by Anonymous*

**Physics **

A 580-g squirrel with a surface area of 855 cm2 falls from a 5.2-m tree to the ground. Estimate its terminal velocity. (Use the drag coefficient for a horizontal skydiver. Assume that the cross-sectional area of the squirrel can be approximated as a rectangle of width 11.1 cm ...

*Wednesday, June 1, 2016 by Anonymous*

**physics**

A sports car weighing 600 kg travels North at 35 m/s. Running a stop sign, the car crashes into a 2000 kg truck traveling East at 20 m/s. The vehicles become locked together and travel 18 meters before stopping. Find the direction and the deceleration of the wreckage from the ...

*Wednesday, June 1, 2016 by kala*

**Physics **

Consider the 50.0-kg mountain climber in the figure to the right. Find (a) the tension in the rope and (b) the force that the mountain climber must exert with her feet on the vertical rock face to remain stationary. Assume that the force is exerted parallel to her legs. Also, ...

*Wednesday, June 1, 2016 by Anonymous*

**Physics**

We can express the velocity as a function of time, v(t), of a car as v(t) = (8.3 m/s) + (6.1 m/s2)t - (4.2 m/s3)t2. What can you say about the average acceleration of the car between t = 1.0 s and t = 2.0 s? A.13 m/s2 B.-6.3 m/s2 C.-13 m/s2 D.0 m/s2 E. 15 m/s2

*Wednesday, June 1, 2016 by Damien Dennison*

**physics**

a water hose is used by a gardener a to fill a 30-liter bucket {one liter =1 000cm^3}. nozzele with an opening of cross sectional area0.500cm^2 is then attached to the hose.the nozzlemis held so that water is projected horizontally from a point 1.00m above the ground. over ...

*Wednesday, June 1, 2016 by afika*

**Physics**

To determine the depth of a well, a person holds a penny at rest, drops it, and measures the time it takes for it to hit the water. If the time is 1.4 s, what is the depth of the well? Neglect air resistance. A.14 m B.52 m C.26 m D.32 m E.10 m

*Wednesday, June 1, 2016 by Damien Dennison*

**Physics**

To determine the depth of a well, a person holds a penny at rest, drops it, and measures the time it takes for it to hit the water. If the time is 1.4 s, what is the depth of the well? Neglect air resistance. A. 14 m B.52 m C.26 m D.32 m E.10 m

*Wednesday, June 1, 2016 by pimp*

**physics**

To determine the depth of a well, a person holds a penny at rest, drops it, and measures the time it takes for it to hit the water. If the time is 1.4 s, what is the depth of the well? Neglect air resistance. A.14 m B.52 m C.26 m D.32 m E.10 m

*Wednesday, June 1, 2016 by pimp*

**Physics**

Suppose you're driving to the city at a constant speed of 75 mi/h for 50 miles. Then construction slows you to a pokey rate of 45 mi/h for the remainder of the trip. You arrive after driving 2 hours and 15 minutes. How far do you live from the city? A.180 mi B.120 mi C.200...

*Wednesday, June 1, 2016 by pimp*

**Physics**

Suppose you're driving to the city at a constant speed of 75 mi/h for 50 miles. Then construction slows you to a pokey rate of 45 mi/h for the remainder of the trip. You arrive after driving 2 hours and 15 minutes. How far do you live from the city?. A. 180 mi B. 120 mi C...

*Wednesday, June 1, 2016 by pimp*

**Physics**

8kg mass moving with a speed of 30 of 30ms-1 is brought to rest in 2.5sec, calculate the magnitude of the constant retarding force

*Wednesday, June 1, 2016 by David*

**Physics**

A wire is supposed to be 0.10 millimeter in diameter. Laser light of wavelength 670 nm shining onto the wire creates a diffraction pattern on a wall that is 4.5 meters behind the wire. The central maximum of that diffraction pattern is 6.3 centimeters wide. What is the ...

*Wednesday, June 1, 2016 by ?*

**Physics**

A new SpaceX rocket is being tested and launches from the ground. The first stage rocket engine provides constant upward acceleration during the burn phase. After the first stage engine burns out, the rocket has risen to 105.0 m and acquired an upward velocity of 50.0 m/s. The...

*Wednesday, June 1, 2016 by pimp*

**physics**

A boy walks 25.0 m to the north and then turns around and walks 11.0 m south. Boys! What is the 1) distance he has traveled and, 2) the magnitude of his displacement. A.4.0 m, 36.0 m B.36.0 m, 14.0 m C.36.0 m, 36.0 m D.14.0 m, 14.0 m

*Wednesday, June 1, 2016 by pimp*

**physics**

A new SpaceX rocket is being tested and launches from the ground. The first stage rocket engine provides constant upward acceleration during the burn phase. After the first stage engine burns out, the rocket has risen to 105.0 m and acquired an upward velocity of The second ...

*Wednesday, June 1, 2016 by pimp*

**Physics**

A police cruiser is travelling at 24 m/s and slows down at a rate of 0.65 m/s2 until it stops. The distance traveled by the cop while slowing down is closest to A. 0.44 km. B.0.38 km. C.0.42 km. D.0.36 km. E. 4.0 km.

*Wednesday, June 1, 2016 by pimp*

**Physics**

Two speakers driven in a phase by the same amplifier at a frequency of 640 Hz, are 7 m apart. A listener originally at the position of one of the speakers starts walking away from that speaker in a direction that is perpendicular to the line connecting the two speakers. How ...

*Tuesday, May 31, 2016 by Anonymous*

**Physics help **

How fast would you need to be travelling relative to an observer in order for them to see a 15% increase in your mass? How do I rearrange the formula to solve for v m = n/sqrt(1-(v^2)/c^2))

*Tuesday, May 31, 2016 by Ryback*

**physics**

The pressure in a section of horizontal pipe with a diameter of 2 cm is 143 kPa. Water flows through the pipe at 2.80 L/ s. If the pressure at a certain point is to be reduced to 103 kPa by constricting a section of the pipe, what should the diameter of the constricted section...

*Tuesday, May 31, 2016 by Anonymous*

**physics**

A horizontal pipe (Venturi Tube) 10.0 cm in diameter has a smooth reduction to a pipe 5.00 cm in diameter. If the pressure of the water in the larger pipe is 8.0 x 105 Pa and the pressure in the smaller pipe is 3.0 x 104 Pa, at what rate does water flow through the pipes. Hint...

*Tuesday, May 31, 2016 by Anonymous*

**Physics**

A truck accelerates from rest at a constant rate of 2 m/s2. How far does the truck travel in the first 3.00 s? A. 36.0 m B. 27.00 m C. 9.0 m D. 18.0 m F. 54.0 m

*Tuesday, May 31, 2016 by pimp*

**physics**

You are standing 5 feet from one speaker and 14 feet from another. Both speakers are producing the same sound. If the combined sound from both speakers is barely audible at your location, which of the following could be the wavelength of the sound?

*Tuesday, May 31, 2016 by john*

**Physics**

A police cruiser is travelling at 24 m/s and slows down at a rate of 0.65 m/s2 until it stops. The distance traveled by the cop while slowing down is closest to

*Tuesday, May 31, 2016 by pimp*

**Physics**

The worker pushes with a force of 10 N that points downward at an angle of 45° below the horizontal. What component of the force moves the crate forward? I do not know how to set up this problem, so any help would be appreciated.

*Tuesday, May 31, 2016 by Dave*

**Physics**

The quarterback of a football team gets off a perfect pass at an angle of 30 degrees with the horizontal. His receiver gathers it in 12.2m downfield from the passer at the same height above ground as the passer's throwing hand. a. What was the ball's velocity as it ...

*Tuesday, May 31, 2016 by Ryan*

**Physics**

A car of mass 920.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 48.2 km/hr (13.4 m/s), the net power which the engine supplies is 5900.0 W (in addition to the extra power required to make up for air resistance and friction). Calculate ...

*Tuesday, May 31, 2016 by Sunny*

**physics help!**

A wire of 62cm length and mass 13g is suspended by a pair of flexible leads in a magnetic field of 0.44T. What are the magnitude and direction of the current required to remove the tension in the supporting leads? Please also scroll down because I also have a question not ...

*Tuesday, May 31, 2016 by angy*

**physics **

A body starts to slide over a horizontal surface with an initial velocity of 0.5m/s. Due to friction its velocity decreases at the rate of 0.05m/s^2 how much time will it take for the body to stop?

*Tuesday, May 31, 2016 by Anonymous*

**physics help**

A straight horizontal sretch of copper wire carries a current of 28 A .What are the magnitude and direction of the magnetic field needed to float the wire that is to balance its weight? Linear density=46.6g/m

*Tuesday, May 31, 2016 by angy*

**physics check**

A straight line 1.8m long carries a current of 13A and make an angle of 15º with a uniform magnetic field B=1.5T Calculate the magnetic force on the wire. Do we use F=I×L×B×sin in order to solve or no

*Tuesday, May 31, 2016 by angy*

**Physics**

A diverging lens has a focal length of 17.3 cm. An object 1.08 cm in height is placed 184 cm in front of the lens. Locate the position of the image. Answer in units of cm.

*Tuesday, May 31, 2016 by Jared*

**Physics **

A car requires velocity of 36 km/h in 10sec just after the start . It takes 20sec to stop . Calculate the acceleration in both the cases .

*Tuesday, May 31, 2016 by Srishti *

**Physics **

A car requires velocity of 36 km /h in 10 sec just after the start . It takes 20 sec to stop . Calculate the acceleration in both the cases

*Tuesday, May 31, 2016 by Srishti *

**physics**

An ice cube floats with 1/9 of its volume below the surface of water, calculate the density of ice.

*Tuesday, May 31, 2016 by anonymous*

**physics**

a bullet of mass 10 gram is fired from a gun of mass 5 kg. If the gun recoils at the speed of 60m/s calculate the initial speed of the bullet.The bullet stops after penetrating 50 cm into a target. Find the opposing force to the motion of the bullet

*Tuesday, May 31, 2016 by Fariha*

**physics**

a car travels 4km in 3 minutes.find the speed of car in cms-1

*Monday, May 30, 2016 by karan deeo*

**Physics**

A garden hose has an inside diameter of 10 mm, and water ﬂows through it at 4.0 m/s. At what rate does water leave the nozzle?. Answer in m3/s

*Monday, May 30, 2016 by Anonymous*

**Physics**

A bus accelerates at 2.0m/s²[E]. A women inside the bus is walking at 2.0 m/s [E]. What is her velocity realtive to the ground at: a) 1s b)2s ? The answer provided don't seem right: a) 0.5 m/s[W] b) 3m/s[W]

*Monday, May 30, 2016 by John Doe*

**Physics**

Water ﬂows through a ﬁre hose of diameter 6.35 cm at a rate of 0.015 m3/s. The ﬁre hose ends in a nozzle of inner diameter 1.750 cm. At what speed does the water exit the nozzle?

*Monday, May 30, 2016 by Anonymous*

**physics**

A horizontal pipe (Venturi Tube) 10.0 cm in diameter has a smooth reduction to a pipe 5.00 cm in diameter. If the pressure of the water in the larger pipe is 2.0 x 105 Pa and the pressure in the smaller pipe is 5.0 x 104 Pa, at what rate does water flow through the pipes. Hint...

*Monday, May 30, 2016 by Anonymous*

** physics**

What is the strength of intermolecular forces in methylated spirit, acetone, water, glycerin and oil

*Monday, May 30, 2016 by lerato*

**Physics**

At one end of the Venturi Tube the pressure and speed of flowing water is 21 kPa and 0.05m/s respectively. At another point the pressure is 5 kPa. Find the speed of the water at the second point. Answer in m/s

*Monday, May 30, 2016 by Anonymous*

**Physics**

Water flows at a rate of 8.0 L/s through an opening at the bottom of a tank that has a diameter of 4.0 cm. How high is the water level of this open- top tank?

*Monday, May 30, 2016 by Anonymous*

**Physics**

At what speed does water escape from a large open-top tank through an opening 2.00 cm in diameter. The opening is 3.00 m below the water level of the tank on the side of the tank.

*Monday, May 30, 2016 by Anonymous*

**algebra**

In his physics class, Mario discovered the height, h, in feet of a bouncing basketball after b bounces is given by teh formula: h = 12(2/3)b - what is the height of the ball after 3 bounces?

*Monday, May 30, 2016 by Anonymous*

**physics**

A scooter acquires a velocity of 30km/hr in 10 seconds just after the start.it takes 20 seconds to stop.calculate the acceleration in the two cases

*Monday, May 30, 2016 by yash sharma *

**Physics**

A brass rod is two meter long at a certain temperature the brass rod is 2m long what is it length to a temperature raise of look if alpha of brass is 19*10-6 kelvin

*Monday, May 30, 2016 by Patience*

**physics pls help**

Please can someone show me how to go about this problem? The X-Y plane is illuminated by an electric field of strenght given as E=(24î + 60j + 70k) N/C; the flux through a 1.5m² potion of the illuminated plane is

*Sunday, May 29, 2016 by jay*

**physics **

A dolphin wants to swim directly back to its home bay, which is 0.800 km due west. It can swim at a speed of 3.58 m/s relative to the water, but a uniform water current flows with speed 2.95 m/s in the southeast direction.

*Sunday, May 29, 2016 by joe*

**physics **

Please can someone show me how to go about this problem? The X-Y plane is illuminated by an electric field of strenght given as E=(24î + 60j + 70k) N/C; the flux through a 1.5m² portion of the illuminated plane is

*Sunday, May 29, 2016 by jay*

**Physics**

A partially filled bucket of water sits on a scale and its weight is 4.8 N. A piece of metal is suspended from a thread and completely immersed in the bucket (but does not touch the bottom). The scale now reads 7.8 N. Find the volume of the metal.

*Sunday, May 29, 2016 by Anonymous*

**physics**

A piece of copper of mass 40 grams at 20 degrees Celsius is placed in a copper calorimeter of mass 60 grams containing 50 grams of water at 10 degrees Celsius .ignoring heat losses,what will be the final steady temperature after stirring?(specific heat capacity of copper and ...

*Sunday, May 29, 2016 by samuel*

**PHYSICS**

A stone is dropped from the top of a cliff and one second latter a second stone is thrown vertically downward with a velocity of 20m/s. How far below the top of the cliff will the stone overtake the first?

*Sunday, May 29, 2016 by CHRISTINE*

**PHYSICS**

A football is kicked from the ground at an angle 30degree above the horizontal with an initial speed 18m/s and directly towards the goalkeeper. If the goal line is a horizontal distance 25m away calculate the vertical height at which the ball crosses the goal line if not ...

*Sunday, May 29, 2016 by CHRISTINE*

**Physics grade 11 HELP**

A cannon fires a projectile at 75 m/s at an angle of 56.7 above the horizontal. How high does the projectile get off the ground?

*Sunday, May 29, 2016 by Shirley*

**Physics**

If our planet is travelling at 10000 mph (just using hypothetical numbers) and you launched a rocket into space at 10000 mph (ignoring the planets rotational speed to keep this simple) on the same exact path the planet is moving, would the rocket be moving at 20000 mph in space?

*Saturday, May 28, 2016 by Will*

**Physics**

A hydraulic press has an input cylinder 4.0cm in diameter and an output cylinder 16cm in diameter. (a) Assuming 100 percent efﬁciency, ﬁnd the force exerted by the output piston when a force of 170N is applied to the input piston.

*Saturday, May 28, 2016 by Anonymous*

**Physics**

A partially filled bucket of water sits on a scale and its weight is 3.5 N. A piece of metal is suspended from a thread and completely immersed in the bucket (but does not touch the bottom). The scale now reads 7.5 N. Find the volume of the metal.

*Saturday, May 28, 2016 by Anonymous*

**PHYSICS**

A ball is dropped onto the floor from a height of 20m. It rebounds to a height of 15m. If the ball was in contact with the floor for 0.01sec what was its average acceleration during the contact take g=10m/s

*Saturday, May 28, 2016 by CHRISTINE*