Friday

June 24, 2016
**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*

**Physics**

What is the Buoyancy force exerted on a 180kg iron anchor when it is immersed in seawater? The density of iron is 7.8×103 kg/m3 and that of seawater is 1.03 × 103 kg/m3 .
*Saturday, May 28, 2016 by Anonymous*

**Physics**

What is the Buoyancy force exerted on a 180kg iron anchor when it is immersed in seawater? The density of iron is 7.8×103 kg/m3 and that of seawater is 1.03 × 103 kg/m3 .
*Saturday, May 28, 2016 by Anonymous*

**Physics**

A raft is constructed of wood having a density of 6.00x102 kg/m3. Its surface area is 5.40 m2 and its volume is 0.45 m3. When the raft is placed in fresh water, to what depth h is the raft submerged by its weight? The density of fresh water is 1000 kg/m3. Hint: Use Newton’...
*Saturday, May 28, 2016 by Anonymous*

**Physics**

The mass of a liter of milk is 1.032 kg. The butterfat that it contains has a density of 865 kg/m3 when pure, and it constitutes exactly 4.0 percent of the milk by volume. What is the density of the fat-free skimmed milk
*Saturday, May 28, 2016 by Anonymous*

**Physics**

A thin sheet of gold foil has an area of 2.98 cm2 and a mass of 6.20 mg. How thick is the sheet? The density of gold is 19, 300 kg/m3.
*Saturday, May 28, 2016 by Anonymous*

**PHYSICS**

A player kicks a ball at an angle of 37degree with the horizontal and with an initial speed of of 48ft/s. A second player standing at a distance of 100ft from the first in the direction of the kick starts running to meet the ball at the instant it is kicked. How fast must he ...
*Saturday, May 28, 2016 by CHRISTINE*

**Physics**

A spiral spring 20cm long is stretched to 25cm by a load of 50N.What will be its length when streched by 100N assumimg that the elastic limit is not reached?
*Saturday, May 28, 2016 by Olamiekan*

**Physics**

A motorboat whose speed in still water is 2.91 m/s must aim upstream at an angle of 30.0 degrees (with respect to a line perpendicular to the shore) in order to travel directly across the stream. - What is the speed of the current? - What is the resultant speed of the boat ...
*Friday, May 27, 2016 by Alyssa*

**Physics**

starting with the equation for resistors in parallel, prove that for two resistors R1 and R2, the equivalent total resistance (RT) is: Rt=R1R2/R1+R2 I kind of understand it, but it isn't giving me the right answer which should be the equation?
*Thursday, May 26, 2016 by lomonoyan*

**physics**

Si unit of specific inductive capacity?
*Thursday, May 26, 2016 by Deepak*

**physics**

A man of weigt 600N runs up the stairs of heigt 4m in 3seconds. what is exerted by the man?
*Thursday, May 26, 2016 by vincent*

**physics **

a source emits 1700Hz frequency travelling at a speed of 70m/s. A detector is placed 200m away. What is the frequency detected by the detector when the source is closest to it? Also find the distance between them when the detector detects the frequency to be 1200Hz. Velocity ...
*Thursday, May 26, 2016 by please Help urgentlyph*

**physics**

A red racecar accelrates at a constant rate of 5 m/s2. How much time does it take to increase its speed from 50 m/s to 60 m/s? a. 17 s b. 0.058 s c. 0.25 s 2.0 s
*Thursday, May 26, 2016 by Pimp*

**Maths,Physics,Life Science, Agricultural science**

list three factors to consider when choosing subject in grade 10
*Thursday, May 26, 2016 by sibongile*

**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
*Thursday, May 26, 2016 by Pimp*

**physics**

A rectilinear homogeneous conductor OA of mass 12 g and of length 36cm hangs freely from its upper end O while its lower end A slightly touches the surface of the mercury. Terminals C and D are connected to a generator which supplies a current 7.4A. A horizontal magnetic field...
*Thursday, May 26, 2016 by amber*

**physics**

Which idea did Isaac Newton’s experiments with light support?
*Thursday, May 26, 2016 by br*

**physics **

Four copper wires of equal length are connected in series. Their cross-sectional areas are 0.96 cm^2, 2.02 cm^2, 2.90 cm^2, and 5.06 cm^2. A potential difference of 116 V is applied across the combination. Determine the voltage across the 2.02 cm^2 wire.
*Thursday, May 26, 2016 by My question wasn't answered....*

**PHYSICS**

a shell of mass M moving with velocity v breaks into two fragments. one of the mass comes to rest. velocity of the second fragment is
*Wednesday, May 25, 2016 by Mariya*

**Physics**

Waves are coming towards your boat at a speed of 4 m/s, you are standing on the fish scale and notice that the reading on the scale changes up and down such that the lowest scale reading is ½ of the maximum scale reading. If the total vertical distance travelled by the ...
*Wednesday, May 25, 2016 by Anonymous*

**Physics**

Waves are coming towards your boat at a speed of 4 m/s, you are standing on the fish scale and notice that the reading on the scale changes up and down such that the lowest scale reading is ½ of the maximum scale reading. If the total vertical distance travelled by the ...
*Wednesday, May 25, 2016 by Anonymous*

**Physics **

Two positive charged spheres, one with 2 times the charge of the other are 38 cm apart. The net force between them is 0.77 N. What is the charge on the lesser charged sphere?
*Wednesday, May 25, 2016 by Becca *

**physics**

A diffraction grating with 1000 slits/cm is oriented parallel to the y-axis and its center is located on the x-axis at x = -5.00 m. A source of light of wavelength 650 nm is located on the x-axis at x = -125 m. At how many locations does constructive interference occur on the ...
*Wednesday, May 25, 2016 by Chad*

**Quick physics help**

what does a mirror do to images that it reflects
*Wednesday, May 25, 2016 by Anonymous *

**physics**

Four copper wires of equal length are connected in series. Their cross-sectional areas are 0.96 cm^2, 2.02 cm^2, 2.90 cm^2, and 5.06 cm^2. A potential difference of 116 V is applied across the combination. Determine the voltage across the 2.02 cm^2 wire.
*Wednesday, May 25, 2016 by vivian*

**physics**

A body is thrown vertically upwards at an initial velocity of 30m/s. Find the velocity after 2s and the time it takes to reach the maximum height.(TAKE g equal 10m/s2(square).
*Wednesday, May 25, 2016 by josephafful*

**Physics**

A transverse wave traveling in a string takes 1.40 s to move 13.2 m. The mass of a 8.50 m piece of the string is 1.60 kg. What is the tension in the string?
*Wednesday, May 25, 2016 by Kevin*

**Physics**

The string is 0.95 m long with tension 8.00 N. The total mass of the string is 12.34 g. Find the period of the oscillation.
*Wednesday, May 25, 2016 by Kevin*

**physics **

a submarine fitted with a SONAR system operates at a frequency 50kHz. An enwmy submarine is now moving towards it with a speed of 450km/hr. Find the frequency of the sound received back at the SONAR from the enemy submarine. Velocity of sound in water is 1450m/s.
*Wednesday, May 25, 2016 by please Help urgently*

**physics**

a gun,kept on straight horizontal ground is used to hit a car, traveling along the same road away from the gun with a uniform speed of 72km/h.The car is at a distance of 500m from the gun. when the gun is fired at an angle of 45 degrees with the horizontal. find (1) the ...
*Wednesday, May 25, 2016 by jabulani*

**physics**

the range of a rifle bullet is 100m, when thither is the angle of projection if the bullet is fired withe the same angle from a car traveling at 36km/h towards the target, show that the range will increase by 100/7 squire root of tan thither
*Wednesday, May 25, 2016 by jabulani*