Wednesday

September 28, 2016
**Physics**

The figure shows a cube whose sides are all 5cm long. Over the entire left-hand side of the cube is a uniform electric field E1=7500 N/C which is entering the cube at 20 degrees below the x axis. Over the right-handed side is a uniform electric field E2=4500 N/C which is ...

*Tuesday, June 14, 2016 by Anonymous*

**Physics**

Negative charge is distributed uniformly around three-quarters of a circle of radius, a, with the center of curvature at the origin. a) Use integration to find an algebraic expression for the x and y components of the net electric field at the origin in terms of the linear ...

*Tuesday, June 14, 2016 by Anonymous*

**Physics**

I have a 67 as a final grade for the year in my physics class my final exam counts as 10% if I get a 0 and just don't show up to my final will I fail the class for the year?

*Tuesday, June 14, 2016 by Bs *

**physics**

In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. Suppose the building had been constructed. Ignoring Earth's rotation, find the change in your weight if you were to ride an elevator from the street level, where you weigh 532 N, to ...

*Tuesday, June 14, 2016 by sonam*

**physics**

Can I still use the equation that I generated from my curve when doing the experiment even if the number I want to calculate is bigger than the last point in my curve ( ps the curve is a best fit line) would my answer be accurate??

*Tuesday, June 14, 2016 by balu*

**Physics**

4. If F1 stands for a force vector of magnitude 30.0 N and F2 stands for a force vector of magnitude 40.0 N acting in the directions shown in Figure 3-6, what are the magnitude and direction of the resultant obtained by the vector addition of these two vectors using the ...

*Tuesday, June 14, 2016 by Winsome Purrier*

**physics**

The horizontal door of a substance at a depth of 500m has an area of 0.4m^2 . Calculate the force exerted by the sea water on the door at this depth.

*Tuesday, June 14, 2016 by somay*

**physics**

a battery has internal resistace of 4ohm and the emf is 12v .The battery used to maintain a current in a resistor of resistance of 20 ohm a)Calculate the current in the circuit b)the potential difference across the ends of the 20 ohm resistor and the energy transformed in the ...

*Tuesday, June 14, 2016 by fredah*

**Physics**

A satellite experiences a gravitational force of 228 N at an altitude of 4.0xE7 m above Earth. What is the mass of this satellite ?

*Tuesday, June 14, 2016 by L*

**Physics**

A 620 kg satellite orbits the earth where the acceleration due to gravity is 0.233 m/s^2. What is the kinetic energy of this orbiting satellite?

*Tuesday, June 14, 2016 by L*

**Physics**

A 52 Kg child is riding the Ferris wheel of radius 12m and period 18s. What force does the seat exert on the child at the top and bottom of the ride?

*Tuesday, June 14, 2016 by Chantelle*

**physics**

A mass m 1 of 100 kg travelling with a uniform velocity of 5 m/s along a line collides with a stationary mass m 2 of 1000 kg. After the collision, both the masses travel together with the same velocity. The coefficient of restitution is:

*Tuesday, June 14, 2016 by Anonymous*

**physics**

a charge Q is distributed uniformly along a line segment bent into a semi circle of radius X.show that the field at the center of the circle is given by E=Exi+Eyj=Q/2π2ε˳̻R2

*Tuesday, June 14, 2016 by niyom*

**physics**

consider a point A situated 85cm north of a point charge -45*10-3c and a point B which is situated 60cm west of the charge determine VB-VA

*Tuesday, June 14, 2016 by niyom*

**Physics **

A proton is traveling at 2.3E6 m/s in a circular path in 0.75 T magnetic field. What is the magnitude of the force of the proton?

*Monday, June 13, 2016 by Chantelle*

**Physics**

A 22 kg crate is moving horizontally on the floor at a constant speed. Find the normal force on the crate.

*Monday, June 13, 2016 by MCPHS*

**Physics **

Two capacitors of capacitance 10 micro Farad and 12 micro Farad are connected in series with a battery. The voltage across the 12 micro Farad is 10 volts. Compute the total battery voltage.

*Monday, June 13, 2016 by Aps*

**Physics I (Classical)**

Two horizontal forces, P and Q, are acting on a block that is placed on a table. We know that P =(−1.10i + 4.25k) N but the magnitude and direction of Q are unknown. The block moves along the table. Assume there is no friction between the object and the table. Here the ...

*Monday, June 13, 2016 by Victoria*

**physics**

A 5.0 m portion of wire carries a current of 8.0 A from east to west. It experiences a magnetic field of 6.0 × 10^–4 T running from north to south. What is the magnitude and direction of the magnetic force on the wire? 2.4 × 10^–2 N upward 2.4 × 10...

*Monday, June 13, 2016 by anon*

**physics**

Sonia walks due east with a speed of two m/s. Bryan walks north with a speed of two m/s. Which statement best describes the relationship between their velocities? A. Their velocities are different because their speeds are not the same. B. Their velocities are the same because ...

*Monday, June 13, 2016 by Anonymous*

**Physics**

7.0 kilograms of ice at 0 0C and are melted to water at 0 0C. Find the increase in internal energy of the ice as it is melted to water at 0 0C. Use 3.33x 105 J for Lf of ice. Express your answers in calories.

*Monday, June 13, 2016 by Anonymous*

**physics**

When the traffic light turns green, a scooter moves with constant acceleration of 2 ms–2. At same time, a car moving with constant speed of 10 m/s overtakes it. How far beyond the starting point, will the car overtake the scooter?

*Monday, June 13, 2016 by vaadim*

**Physics**

A basketball was kicked 20.0 m above horizontal with an initial velocity of 120.0 m/s at an angle of 35.0˚ above the horizontal. (a) How long is the rocket in air before falling? (b) What is the horizontal range for the rocket? (c) With what speed does the rocket hit the ...

*Sunday, June 12, 2016 by Matt*

**physics**

Two point charges lie along the y axis. A charge of q1 = -12.0 ÂµC is at y = 6.0 m, and a charge of q2 = -5.0 ÂµC is at y = -3.0 m. Locate the point (other than infinity) at which the total electric field is zero.

*Sunday, June 12, 2016 by bukky*

**physics**

an elevator weighs 8000N. It leaves the main floor and arrives to the 15th floor which is 45 meters high. How much work was done by the motor

*Sunday, June 12, 2016 by ryan*

**physics **

An electron accelerated from rest through a potential difference of 50v acquires a speed of 4.2x10^6m/s write down the speed that a potential difference of 200v would produce ?

*Sunday, June 12, 2016 by abdalla *

**physics **

What's kinetic energy in electron volt of a triply ion iron which has been accelerated from rest through a potential difference of 100v?

*Sunday, June 12, 2016 by abdalla *

**Physics**

A car traveling at 28 m/s hits the brakes. If it takes the car 88 m to come to a complete stop, what is its acceleration?

*Sunday, June 12, 2016 by Ricardo*

**Physics**

A ball is drop from a height of 20m and rebounce with a velocity which is 3/4 of this velocity with which it hit the ground. What is the time interval between the first and second bounces? (g=9.8m/s2)

*Sunday, June 12, 2016 by Padmore*

**Physics **

A biker rides700m north 300m east 400m north, 100m west, 1200m south 300m east and finally 100m north .Draw the path of motion of the biker. What distance did he cover?What was his displacement?

*Sunday, June 12, 2016 by Shreya Shree *

**Physics**

You use a rope to slowly pull a sled and its passenger 45 m up a 20∘ incline, exerting a 125-N force on the rope. How much work did Earth do on the sled for the trip in Part B? The answer for part is -5630 J I'm not sure what to do. I tried -5630 J * 9.8 then I tried...

*Saturday, June 11, 2016 by T*

**Physics**

You recently read that a new possibly habitable planet was discovered. The planet, Burt, receives 1700 W/m2 from it’s companion star. If planet Burt has a a radius of 6500 km and acts like a blackbody ( emissivity =1 ) and thus radiates same amount of energy it absorbs, ...

*Saturday, June 11, 2016 by Anonymous*

**Physics**

A boy throws a ball off the top of a 30m high building with a speed of 10m/s at an angle of 30 degrees to the horizontal. How far from the base of the building does the ball strike? I broke in up into 2 dimensional: X horizontal values: Xi=0 Xf=? Vi=8.6m/s. Vf=? a=0 Y vertical...

*Saturday, June 11, 2016 by Leo*

**Physics**

A 37.0-kg crate rests on a level floor. A horizontal force of 50.0 N accelerates the crate at 1.00 m/s2. Calculate the frictional force on the crate. Calculate the coefficient of kinetic friction between the crate and the floor. I got the normal force, 363 N. Now just need ...

*Saturday, June 11, 2016 by Mike*

**physics**

A metal sphere of radius 10cm is given a electric charge find electric intensity and potential at a point whose distance from centre of sphere is: a) 20cm b) 10cm and just outside c)5cm.

*Saturday, June 11, 2016 by vishnu s dharan *

**physics**

point charges +1 micro coulomb and +4 microcoulomb are separated by a distance 4cm in air what is the distance of a null point from the small charge? what is the electric potential at null point?

*Saturday, June 11, 2016 by vishnu s dharan *

**physics**

In an Automobile a 44 kg passenger moving at 40 m/s is brought to rest by an air bag during a 0.1 s what is the magnitude of the average force exerted on the passenger during this time ?

*Saturday, June 11, 2016 by AMOOON*

**Physics**

A car is running at a speed of 100km/h if brake is applied how much ditance will it cover before stopping from point where brake is applied ? How

*Saturday, June 11, 2016 by Aman*

**Physics**

In the time interval from 0.0 s to 10.1 s, the acceleration of a particle traveling in a straight line is given by ax = (0.1 m/s3)t. Let to the right be the +x direction. The particle initially has a velocity to the right of 10.0 m/s and is located 5.4 m to the left of the ...

*Saturday, June 11, 2016 by Ace*

**physics**

Ball A is dropped from the top of a building of height h at the same instant that ball B is thrown vertically upward from the ground. When the balls collide, they are moving in opposite directions, and the speed of A is A times that of B. At what height does the collision occur?

*Saturday, June 11, 2016 by Ace*

**physics**

A speeder traveling at a constant speed of 117 km/h races past a billboard. A patrol car pursues from rest with constant acceleration of (7.6 km/h)/s until it reaches its maximum speed of 175 km/h, which it maintains until it catches up with the speeder.(a) How long does it ...

*Friday, June 10, 2016 by Ace*

**physics**

Find the relation between phase difference and path dofferense

*Friday, June 10, 2016 by Anonymous*

**Physics**

ou recently read that a new possibly habitable planet was discovered. The planet, Burt, receives 2100 W/m2 from it’s companion star. If planet Burt has a a radius of 7500 km and acts like a blackbody ( emissivity =1 ) and thus radiates same amount of energy it absorbs, ...

*Friday, June 10, 2016 by Anonymous*

**Physics**

At high noon (sun rays fall perpendicular to the surface of the earth), the sun delivers 990 W to each square meter of a blacktop road, emissivity of 1 (blackbody). If the hot asphalt loses energy only by radiation, what is its equilibrium temperature? I have everything ...

*Friday, June 10, 2016 by Anonymous*

**Physics**

Two metal plates with the same dimension are soldered together face to face. The face of plate 1 that is not touching plate two is keep at T1 = 106 0C. Similarly, plate 2 “open face” is keep at T2 = 0 0C. Assume the thickness of each plate is 3.0 mm and their areas ...

*Friday, June 10, 2016 by Anonymous*

**physics**

Two charges of magnitude +2×10^–6 C each are 60cm apart. find the magnitude of the force exerted by these charges on a third charge of magnitude +4×10^-4C that is 50cm away from each of the charge.

*Friday, June 10, 2016 by jay*

**physics**

Three blocks, with masses m1 = 5.90 kg, m2 = 5.50 kg, and m3 = 7.10 kg, are pull on a horizontal frictionless surface by a 18.00 N force that makes a 39 o angle (θ) with the horizontal. What is the magnitude of the tension between the m2 and m3 blocks?

*Friday, June 10, 2016 by Last Try Please help!*

**physics **

the resistance of a platinum resistant thermometer is 1.2ohms. when the measuring in Kelvin temperature of oil and 1.0ohms at the triple point of water. find T

*Friday, June 10, 2016 by Izrel *

**physics**

Give two examples to show how physics help in understanding the concept of evolution, biological systems of living organisms.

*Friday, June 10, 2016 by simran*

**Physics**

Mike wants to make a free throw; he realizes that if the ball is exactly 20cm above the hoop as it hits the backboard at the top of its trajectory, it will go in. The free throw line is 4.5 m from the plane of the backboard and the hoop is 3 meters from the ground, Mike throws...

*Thursday, June 9, 2016 by Mike*

**Physics**

Question 1: Dan is pulling on his dog’s leash, the dog is pulling with 40N of force and Dan is pulling with 50N of force, how fast are they going after 2 seconds? Question 2: If you want to throw a rock 50m with a 1 m sling, what frequency do you need to rotate the swing ...

*Thursday, June 9, 2016 by Mike*

**physics**

Both threads are now lengthened such that L=1.00m, while the charges q1 and q2 remain unchanged. What new angle will each thread make with the vertical? Hint: you must solve for the angle numerically

*Thursday, June 9, 2016 by someone*

**Physics **

A basketball player drops a 0.60-kg basketball vertically so that it is traveling at 6.0 m/s when it reaches the floor. The ball rebounds upward at a speed of 4.7 m/s. Determine the average net force that the floor exerts on the ball if the collision lasts 0.12 s. I calculated...

*Thursday, June 9, 2016 by T*

**physics**

The two small spheres each with mass m= 25g are hung by silk threads length L=.65m from a common point. When the spheres are given positive charge such that q1=2q2, each thread hangs stationary at theta=15 degrees from the vertical. Using Newton's first law and coulomb'...

*Thursday, June 9, 2016 by someone*

**physics **

4mm=0.004m 2cm=0.02m 2kg=2000g 4kg= ____m 2) 5 physical senses and why their considered physical -touch,hearing,smell,taste,sight their considered physical because The nervous system has a specific sensory system or organ, dedicated to each sense?

*Thursday, June 9, 2016 by Rein*

**Physics**

The system shown in the following figure is in static equilibrium. Find the frictional force exerted on block (m1) given that the mass of block (m1) is 8.90 kg, the mass of block (m2) is 2.59 kg, and the coefficient of static friction between block (m1) and the surface on ...

*Thursday, June 9, 2016 by Eric Sowell*

**Physics**

A car enters a circular flat curve with a radius of curvature of 0.40 km with a maximum speed of 130 km/h. If the friction between the road and the car's tires can supply a centripetal acceleration, what is the static coefficient of friction?

*Thursday, June 9, 2016 by Luke Michaels*

**Physics- Help!!**

A step-up transformer is used on a 100 V line to increase the potential difference to 1200 V. If the primary has 120 turns, then what is the number of turns in the secondary coil? 1440 turns 1000 turns 100 turns 10 turns Thanks!!!!!

*Thursday, June 9, 2016 by Ellie*

**physics**

A string is stretched between fixed supports separated by 73.0 cm. It is observed to have resonant frequencies of 380 and 475 Hz, and no other resonant frequencies between these two.

*Thursday, June 9, 2016 by Marie*

**Physics**

The A above middle C has a frequency of 440 Hz. If you play this note on a piano and the piano string oscillates with an amplitude of 0.55 mm, what is the maximum acceleration of the string?

*Thursday, June 9, 2016 by Ben*

**physics**

Two identical mass-spring systems consist of 250-g masses attached to springs of spring constant 15 N/m. If one of them starts oscillating from its equilibrium position at time t = 0, how much later should the second one start so they oscillate out of phase by 90 o?

*Thursday, June 9, 2016 by Harry*

**physics**

A large aquarium has viewing ports so people can watch dolphins swim by. What is the net force on a rectangular window, 2.30 m wide and 1.20 m high, if the top of the window is 4.50 m below the surface of the water?

*Thursday, June 9, 2016 by John*

**Math**

In a class of 100 students, 40 offer Biology and 10 offer Chemistry and Biology .10 offer Physics and Chemistry , and 30 offer Physic and Biology . Each student offer at least one of the three subjects. The number of students who offer Biology is equal to those who offer ...

*Thursday, June 9, 2016 by Delson*

**Physics**

A 10 kg block is towed at a 30° incline with respect to the horizontal the rope is parallel to the incline and has attention 100 N assume that the block starts from rest at the bottom of the hill and neglect friction how fast is the block moving after 40 m up the hill

*Wednesday, June 8, 2016 by Michael*

**physics**

As shown in the figure, a bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed of v/2. The pendulum bob is suspended by a stiff rod of length ℓ and negligible mass. 2.1 Derive an expression for the minimum value...

*Wednesday, June 8, 2016 by Tan*

**Math **

in a class of 60 students 30 like maths 25 like physics 30 like chemistry. if 10 like both physics and maths 5 like maths and chem and 5 like phy & chem and 3 like all the subjects. find student like none of subject if 100 students were surveyed

*Wednesday, June 8, 2016 by Anonymous*

**Math **

in a class of 60 students 30 like maths 25 like physics 30 like chemistry. if 10 like both physics and maths 5 like maths and chem and 5 like phy & chem and 3 like all the subjects. find student like none of subject of if 100 students were surveyed

*Wednesday, June 8, 2016 by Dp*

**Physics**

A light spring of force constant 8N/m is cut into two equal parts and then are connected in parallel the equivalent force constant will be what of the system. Solve this problem

*Wednesday, June 8, 2016 by Shadab*

**Physics I (Classical)**

A kayaker needs to paddle north across a 85-m-wide harbor. The tide is going out, creating a tidal current that flows to the east at 2.0 m/s. The kayaker can paddle with a speed of 3.0 m/s. Find the angle West of North he needs to travel and the time it takes him to cross. ...

*Tuesday, June 7, 2016 by Victoria*

**Physics**

A thermos bottle contains 250 g of coffee at 88 0C. You then decide to add 27 g of milk at 5 0C. What is the equilibrium temperature of the mixture? Assume no heat is loss to the thermos bottle and that the specific heat of water, coffee and milk is about the same. Answer is ...

*Tuesday, June 7, 2016 by Anonymous*

**Physics**

An electric heater that produces 860 W (1 W = 1 J/s) of power is used to vaporize water. How much water at 100 0C can be changed to steam in 5 min by the heater? Use Lv = 2.25x106 J/kg for water at 100 0C and express your final answer in grams.

*Tuesday, June 7, 2016 by Anonymous*

**Physics **

Hi!! For this question, I feel like the answer is C but I'm not sure. If the answer is C, could you explain to me why/ if it isn't then why not? A book leans against a crate on a table. Neither is moving. Which of the following statements concerning this situation is ...

*Tuesday, June 7, 2016 by Kaylen *

**Physics **

I'm sorry this is kind of a long question. I've been staring at it for about an hour now and I have no clue where to even start. Thank you so much!!!! A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 836 N. 1...

*Tuesday, June 7, 2016 by Maya*

**Physics**

A constant unbalanced force is applied to an object for a period of time. What would the graph look like as acceleration as a function of elapsed time?

*Tuesday, June 7, 2016 by Zoë*

**Physics**

•A pendulum of mass of 600g is dropped from a height of 30cm. •Calculate the GPE it had (g = 9.81) •Tell me how much KE it will have at the bottom of its swing (assuming no air resistance) •Assuming all the GPE is transferred to KE, what is the maximum ...

*Tuesday, June 7, 2016 by Dominic*

**physics**

A spinal spring,loaded with a piece of metal,extends by 10.5cm in air.When the metal is fully submerged in water,the spring extends by 6.8cm.Calculate the relative density of the metal using Hooke's law

*Monday, June 6, 2016 by frank*

**Physics**

A 29.8-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 88.8 N and is directed at an angle of 39 ° above the horizontal. Determine the coefficient of kinetic friction.

*Monday, June 6, 2016 by Sabrina *

**Physics**

A dart is thrown at a dartboard 3.90 m away. When the dart is released at the same height as the center of the dartboard, it hits the center in 0.555 s At what angle relative to the floor was the dart thrown?

*Monday, June 6, 2016 by Mike*

**Physics**

A dart is thrown at a dartboard 3.90 m away. When the dart is released at the same height as the center of the dartboard, it hits the center in 0.555

*Monday, June 6, 2016 by Mike*

**Physics **

A crane lifts a Load of 50000g very slowly through a distance of 150cm vertically, calculate the work done against gravity if g=10.mls2

*Monday, June 6, 2016 by Glorious*

**physics**

A train is moving with an initial velocity of 30 m/s the breaks are applied so as to produce uniform acceleration of minus 1.5m/s Calculate the time in which it will come to rest

*Monday, June 6, 2016 by devika*

**Physics**

The density of water at 40 C is 1000 kg/ m3. What is the density of water at 900C. Use β= 210x10-6 C0.

*Monday, June 6, 2016 by Anonymous*

**Physics**

18 mols of gold are shaped like a sphere. What is the sphere’s diameter. Note the atomic mass of gold is 0.197 kg/mol and its density is 19,300 kg/m3.

*Monday, June 6, 2016 by Anonymous*

**physics**

An aircraft is flying at Mach 1.34 in air at -30C. What is the speed of the aircraft?

*Monday, June 6, 2016 by Anonymous*

**maths,science, physics**

A block of mass 50kg was left to slide down a ramp elevated at an angle of 45 decrease as shown in the diagram below (assume g=9.8 ms^-2). I . Calculate the net force causing the block to slide down the ramp (assume no friction) II. Calculate the net force causing the block to...

*Sunday, June 5, 2016 by Oxy *

**maths,science, physics**

A toy locomotive of mass 420g moving at 30cm s^-1 south collides with a carriage of mass 200g moving at 30cm s^-1 north. If they become couple together, what is their common velocity after the collision?

*Sunday, June 5, 2016 by Oxy *

**maths,science, physics**

A bullet of mass 20g is fired from a rifle of mass 4kg with a speed of 500ms^-1.Calculate the initial velocity of the recoil of the rifle.

*Sunday, June 5, 2016 by Oxy *

**maths,science, physics**

A mass of 2kg resting on a smooth level table is connected by a light in extensible string passing over a frictionless pulley to a suspended 3kg mass (imagine as shown on the diagram).Find: I.The tension in the string. II. The magnitude of the acceleration of the two masses. ...

*Sunday, June 5, 2016 by Oxy *

**maths,science, physics**

A small cart of mass 300g when emty can move freely on a horizontal surface. The cart contains 100g of sand and moves initially with speed of 18cm s^-1. a)what would be the speed of the cart if a further 200g of sand were dropped vertically into it from a stationary container...

*Sunday, June 5, 2016 by Oxy *

**maths,science, physics**

A truck of mass 4×10^3 moving at 3.5 ms^-1 collides with a stationary truck to which it becomes automatically coupled. Immediately after the impact the trucks moves along together at 2 ms^-1 in the same direction. Find the mass of the second truck.

*Sunday, June 5, 2016 by Oxy *

**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*