Wednesday

November 25, 2015
**Physics **

Please what is Empirical Temperaturee
*Tuesday, August 11, 2015 by badmus*

**physics **

a sled is moving up a slope that makes an angle θ of 5.00◦ with respect to the horizontal. The coefficient of kinetic friction between the sled and the snow is μk = 0.0500. What is the magnitude of the acceleration of the sled as it moves up the slope?
*Tuesday, August 11, 2015 by anonymous*

**physics**

The drawing shows a skateboarder moving at 6.87 m/s along a horizontal section of a track that is slanted upward by 51.9 ° above the horizontal at its end, which is 0.616 m above the ground. When she leaves the track, she follows the characteristic path of projectile ...
*Tuesday, August 11, 2015 by anonymous*

**physics**

A person is trying to judge whether a picture (mass = 1.64 kg) is properly positioned by temporarily pressing it against a wall. The pressing force is perpendicular to the wall. The coefficient of static friction between the picture and the wall is 0.700. What is the minimum ...
*Tuesday, August 11, 2015 by anonymous*

**PHYSICS**

The temperature of the cosmic background radiation is measured to be 2.7 K. What is the wavelength of the peak in the spectral distribution at this temperature? What frequency corresponds to this wavelength?
*Monday, August 10, 2015 by Julie*

**PHYSICS**

Suppose that at least 13.0 eV is needed to free an electron from a particular element, i.e., to ionize the atom. What is the lowest frequency photon which can accomplish this? And, what is the corresponding wavelength for that photon? Give frequency for answer 1 and wavelength...
*Monday, August 10, 2015 by Julie*

**Physics **

A torque of 32Nm is applied to a wheel, which causes it to accelerate at 25 rad/s2. What is the rotational moment of inertia of the wheel? I got 1.28kg/m^2. Is this correct?
*Monday, August 10, 2015 by Yoyo*

**physics**

A dog runs west for 20m then North for 15m. What is the resultant displacement of the dog graphically and by calculations
*Monday, August 10, 2015 by sfundo*

**physics**

a plane travelling at 200.0m/s braked to a stop in 6.2s. what was its acceleration?
*Monday, August 10, 2015 by Anonymous*

**engineering physics 1-science**

A crate of mass m(=32 kg) rides on the bed of a truck attached by a cord to the back of the cab . The cord can withstand a maximum tension of 68N before breaking. Neglecting friction between the crate and the truck bed, find the maximum acceleration the truck can have before ...
*Sunday, August 9, 2015 by Endes Nalabaw*

**Physics **

A spaceship is on a straight-line path between the Earth and the Moon. At what distance from Earth is the net gravitational pull on the probe from the Earth and the moon zero? Mass of Earth = 6×10^24 kg. Mass of Moon = 7×10^22 kg. Can someone please confirm if my ...
*Sunday, August 9, 2015 by Yoyo*

**Physics **

A torque of 32Nm is applied to a wheel, which causes it to accelerate at 25 rad/s2. What is the rotational moment of inertia of the wheel? I got 1.28kg/m^2. Is this correct?
*Sunday, August 9, 2015 by Yoyo*

**physics**

light from the sun travels 1.5x10km to reach the earth .how long does it journey take in minutes?
*Sunday, August 9, 2015 by rob*

**physics**

A 33 tonnes jet airline has 4 engines,each producing a nearly constant thrust of 165kN during the takeoff roll.Determine the length of the runway required if the takeoff speed is 320km/h.Neglect air and rolling resistance.
*Sunday, August 9, 2015 by olivia (pls help!!)*

**physics**

a projectile is fired at an angle of 27 above the horizontal from the top of a cliff 500 ft high. The initial speed of projectile is 1670 ft/s. How far will it move horizontally before hitting the level ground at the base of the cliff?
*Sunday, August 9, 2015 by vien*

**physics**

A 50.9-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.526 and 0.311, respectively. What horizontal pushing force is required to (a) just start the crate moving and (b) slide the crate across the dock at a constant speed?
*Sunday, August 9, 2015 by anonymous*

**physics**

A golfer hits a shot to a green that is elevated 2.70 m above the point where the ball is struck. The ball leaves the club at a speed of 19.0 m/s at an angle of 36.0˚ above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air ...
*Saturday, August 8, 2015 by anonymous*

**physics**

Using the following conversion factors, determine the number of milliliters in a volume of 2.37 fluid ounces: 1 gallon (gal) = 128 oz., 3.785 x 10-3 cubic meters (m3) = 1 gal, 1 mL = 10-6 m3. I got an answer 7.09ml, but it's incorrect, so confused how to covert those factors
*Saturday, August 8, 2015 by Jack*

**physics**

A 50.9-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.526 and 0.311, respectively. What horizontal pushing force is required to (a) just start the crate moving and (b) slide the crate across the dock at a constant speed?
*Saturday, August 8, 2015 by anonymous*

**Physics**

A lumberjack (mass = 104 kg) is standing at rest on one end of a floating log (mass = 234 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +3.18 m/s relative to the shore, and then hops onto an identical floating log that is ...
*Saturday, August 8, 2015 by Cassie*

**physics**

A swimmer, capable of swimming at a speed of 1.81 m/s in still water (i.e., the swimmer can swim with a speed of 1.81 m/s relative to the water), starts to swim directly across a 2.29-km-wide river. However, the current is 1.31 m/s, and it carries the swimmer downstream. (a) ...
*Saturday, August 8, 2015 by anonymous*

**physics**

A golfer hits a shot to a green that is elevated 2.70 m above the point where the ball is struck. The ball leaves the club at a speed of 19.0 m/s at an angle of 36.0˚ above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air ...
*Saturday, August 8, 2015 by anonymous*

**physics**

damon,reiny,steve,ms sue.plz get a solution 2 my question please itz urgent!!!
*Saturday, August 8, 2015 by edward*

**Physics**

so i need to calculate the moment of inertia of the pulley and the angular acceleration of the pulley. mass A = 9kg Mass B = 15kg Inner pulley= Mass 3kg R= 6cm Outerpulley= mass 7kg R=12cm both are disks glued together. it is a composite pulley with two masses hanging. Mass A ...
*Saturday, August 8, 2015 by john*

**physics**

qustion(1):A rectangular face of a casting 250mmx100mm is to be machined on a sharper.if the average cuting speed is to be 20m/min and the feed is to be 2mm/stroke,calculate the time taken to machine the face of casting.allow 5mm overun at each end of the stroke. question(2):...
*Saturday, August 8, 2015 by edward*

**Physics**

A dog runs west for 20m then north for 15m. What is the resultant displacement of the dog graphically and by calculations?
*Saturday, August 8, 2015 by Sfundo*

**Physics**

Leila walks south for 20m and then west for 20m. What is her resultant displacement graphically?
*Saturday, August 8, 2015 by Sfundo*

**Physics **

Just reposting. A spaceship is on a straight-line path between the Earth and the Moon. At what distance from Earth is the net gravitational pull on the probe from the Earth and the moon zero? Mass of Earth = 6×10^24 kg. Mass of Moon = 7×10^22 kg. The distance from ...
*Saturday, August 8, 2015 by Yoyo*

**Physics **

Just reposting. A cricket ball rotates at 1800 rev/min as it travels through the space in a straight line at 160 km/hr. How many times does it revolve after traveling 20m? Can someone confirm with me if 13.5 revolutions in 20m is right. That's the answer i got to. If it&#...
*Saturday, August 8, 2015 by Yoyo*

**physics**

A proton with charge mass ratio of 108 C/kg is moving in a circular orbit in a uniform magnetic field of 0.5T .Calculate the frequency of revolution.
*Saturday, August 8, 2015 by Simran*

**physics**

A pole of infinite length is planted vertically on the ground. A stone is placed at a distance of 'd1' meters from the pole towards the right. A bird is sitting on the ground exactly in the middle of the pole and stone. The bird flies away towards the right in such a ...
*Friday, August 7, 2015 by Anonymous*

**Physics**

A spring streches by 3.90 cm when a 10g mass is hung from it. If a 25g mass attached to this spring oscillates in simple harmonic motion, calculate the period of the motion?
*Friday, August 7, 2015 by Godwin*

**physics**

An object undergoes simple harminic motion of amplitude A. Through what total distance does the object move during one complete cycle of its motion?
*Friday, August 7, 2015 by Godwin*

**physics**

a stone is thrown in such a manner that it would just hit a bird at the top of a tree and afterwards reach a maximum height double that of the tree . if at the moment of throwing the stone the bird flies away horizontally with constant velocity and the stone hits the bird ...
*Friday, August 7, 2015 by prabhat*

**Physics **

If a man weighs 900 N on the earth, what would he weigh on jupiter, where acceleration due to gravity is 25.9 m/s^2?
*Friday, August 7, 2015 by Godwin*

**physics**

a pin has a diameter of 0.005mm at its sharp end. calculate the pressure exerted when a force of 2.0N is applied to the pin.
*Friday, August 7, 2015 by kongo*

**physics**

a bullet of mass 20g is fired into a block of wood of mass 400g . if the bullut and wood move together with speed of 20ms-1 calclate(i) speed with the bullet hits the wood ii the kinetic energy lost iii state the energy changes involed
*Friday, August 7, 2015 by kongo.*

**Physics**

Suppose you wanted to be able to see astronauts on the moon. What is the smallest diameter of the objective lens required to resolve a 0.61 m object on the moon?
*Friday, August 7, 2015 by Mary*

**Physics**

Which one of the following actions would make the maxima in the interference pattern from a grating move closer together? Decreasing the frequency of the laser. Increasing the frequency of the laser. Increasing the number of lines per length. Increasing the wavelength of the ...
*Friday, August 7, 2015 by Mary*

**Physics **

A spaceship is on a straight-line path between the Earth and the Moon. At what distance from Earth is the net gravitational pull on the probe from the Earth and the moon zero? Mass of Earth = 6×10^24 kg. Mass of Moon = 7×10^22 kg. The distance from the sun to the ...
*Friday, August 7, 2015 by Yoyo*

**Physics **

A meter-long stick is balanced vertically on the ground. It is then made to fall with a gentle nudge. What is the speed of the end of the stick as it hits the floor? Assume the end on the floor does not slip. Treat the stick as a “thin rod.” Really need help with ...
*Friday, August 7, 2015 by Yoyo*

**Physics **

A torque of 32Nm is applied to a wheel, which causes it to accelerate at 25 rad/s2. What is the rotational moment of inertia of the wheel? I got 1.28kg/m^2.
*Friday, August 7, 2015 by Yoyo*

**Physics **

A cricket ball rotates at 1800 rev/min as it travels through the space in a straight line at 160 km/hr. How many times does it revolve after traveling 20m? Can someone confirm with me if 13.5 revolutions in 20m is right. That's the answer i got too. If it's wrong can ...
*Friday, August 7, 2015 by Yoyo*

**physics**

A puck is moving on an air hockey table. Relative to an x, y coordinate system at time t = 0 s, the x components of the puck's initial velocity and acceleration are v0x = +3.9 m/s and ax = +1.2 m/s2. The y components of the puck's initial velocity and acceleration are ...
*Friday, August 7, 2015 by sarah*

**Physics**

A 100 kg load is lowered by means of a cable with a downward acceleration of 5.0 m/s^2. What is the tension in the cable?
*Friday, August 7, 2015 by Godwin*

**physics**

Suppose a car is traveling at +15.0 m/s, and the driver sees a traffic light turn red. After 0.405 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 6.00 m/s2. What is the stopping distance of the car, as measured from the point where...
*Friday, August 7, 2015 by sarah*

**physics**

How many grams of Al2O3 are formed from 15L of O2 at 97.5kPa and at 21degree celcius.
*Friday, August 7, 2015 by Alice*

**physics **

(a) What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 10.5 m/s when going down a slope for 3.18 s? (b) How far does the skier travel in this time?
*Friday, August 7, 2015 by sarah*

**physics**

A gas at 250K and 15atm has a molar volume smaller than calculated from perfect gas law Calculate: a) the compression factor under these conditions b) the molar volume of gas
*Friday, August 7, 2015 by Alice*

**Physics **

a 50 g marble is released from a height 1 m above the floor. Calculate its momentum just before hitting the ground
*Friday, August 7, 2015 by Anonymous*

**physics**

A 1000 kg car can accelerate from rest to a speed of 25 m/s in 10 s. What average power must the engine of car produce in order to cause this acceleration? Neglect friction losses
*Friday, August 7, 2015 by Muqadas*

**Physics**

A block is given an initial velocity of 5.00 m/s up a frictionless 20degree incline. How far up the incline does the block slide before coming to rest?
*Thursday, August 6, 2015 by Godwin*

**Physics**

A tugboat exacts a constant force of 5 000N on a ship moving at constant speed through a harbor. How much work does the tugboat do on the ship in a distance of 3.00 km?
*Thursday, August 6, 2015 by Godwin*

**Physics**

Monochromatic light of wavelength, λ is traveling in air. The light then strikes a thin film having an index of refraction n1 that is coating a material having an index of refraction n2. If n2 is larger than n1, what minimum film thickness will result in maximum ...
*Thursday, August 6, 2015 by Julie*

**Physics**

A ship travels 100 km due north on the first day of a voyage, 60 km north-east on the second day, and 120 km due east on the third day. Find the resultant displacement.
*Thursday, August 6, 2015 by Godwin*

**physics **

Two identical pellet guns are fired simultaneously from the edge of a cliff. These guns impart an initial speed of 44.7 m/s to each pellet. Gun A is fired straight upward, with the pellet going up and then falling back down, eventually hitting the ground beneath the cliff. Gun...
*Thursday, August 6, 2015 by sarah*

**physics**

A car is traveling at a constant speed of 25.5 m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from the ramp. The second car starts from rest and has a constant acceleration. What acceleration must it maintain, so that the two...
*Thursday, August 6, 2015 by sarah*

**physics**

A bicycle is rolling down a circular portion of a path; this portion of the path has a radius of 8.73 m. As the drawing illustrates, the angular displacement of the bicycle is θ = 0.979 rad. What is the angle (in radians) through which each bicycle wheel (radius = 0.320 m...
*Wednesday, August 5, 2015 by paul*

**physics**

Q: A block A of mass 0.5 kg can slide on a frictionless incline of angle 30o and length 0.8 m kept inside an elevator going up with uniform velocity 2m/s. Find the time taken by the block to slide down the length of the incline if it is released from the top of the incline. ...
*Wednesday, August 5, 2015 by mohit*

**college. physics and chemistry and mathematics**

An element crystalline in face centred cubic lattice. CCalculate the length of the side of the unit cell if the radius of atom is200pm
*Wednesday, August 5, 2015 by nerswn narzary*

**Physics**

A particle with a mass of 0.660 kg is attached to a horizontal spring with a force constant of 23.76 N/m. At the moment t = 0, the particle has its maximum speed of 15 m/s and is moving to the left. (Assume that the positive direction is to the right.) (a) Determine the ...
*Wednesday, August 5, 2015 by Mark*

**Physics**

The position of a particle is given by the expression x = 2.00 cos (6.00πt + π), where x is in meters and t is in seconds. (a) Determine the frequency. ______Hz (b) Determine period of the motion. ______s (c) Determine the amplitude of the motion. ______m (d) ...
*Wednesday, August 5, 2015 by Mark*

**Physics**

A fully loaded elevator weighing 2000 lbs accelerates upward from rest, attaining its rated velocity of 20 fps upon reaching a height of 25 ft. Solve for the tension on the cable lifting the elevator. What is the minimum required power of the lifting motor if 10% is allowed ...
*Wednesday, August 5, 2015 by Aries*

**Physics**

Calulate the acceleration of a 300,000kg jet on take when the thrust is equal to 120,000N. I used a = f/m to get 0.4m/s/s Tricky part. How long a runway is required for the plane to take off at a speed of 300km/h? Help?
*Wednesday, August 5, 2015 by Roland*

**physics**

A coil takes a current of 10.0 A and dissipates 1410 W when connected to a 230 V, 50 Hz sinusoidal supply. When another coil is connected in parallel with it, the total current taken from the supply is 20.0 A at a power factor of 0.866. Determine the current and the overall ...
*Tuesday, August 4, 2015 by lolo*

**Physics**

Calculate the angular momentum of a 1.75 kg ball rotating on the end of a thin string in a circle of radius 3.5 and an angular speed of 11 rad /s. Treat the ball as a point.
*Tuesday, August 4, 2015 by Anonymous*

**Physics**

A 1.00 kg glider attached to a spring with a spring constant of 40 N/m oscillates on a horizontal, frictionless air track. At t = 0 the glider is released from rest at x = -17 cm. Find the maximum value of the velocity in m/s.
*Tuesday, August 4, 2015 by Anonymous*

**Physics**

Two planets of mass 7 x 10^25 kg are release from rest 2.5 x 10^12 m apart. What is the speed of the planets when they are half this distance apart?
*Tuesday, August 4, 2015 by Anonymous*

**Physics**

A small fly of mass 0.25 g is caught in a spider’s web. The web vibrates predominately with a frequency of 5 Hz. Find the value of the spring constant.
*Tuesday, August 4, 2015 by Anonymous*

**Physics**

A 1.00 kg glider attached to a spring with a spring constant of 40 N/m oscillates on a horizontal, frictionless air track. At t = 0 the glider is released from rest at x = -17 cm. Find the maximum value of the velocity in m/s.
*Tuesday, August 4, 2015 by Anonymous*

**Physics**

Two planets of mass 7 x 10^25kg are released from rest 2.5 x 10^12 m apart. What is the speed of the planets when they are half this distance apart?
*Tuesday, August 4, 2015 by Anonymous*

**Physics**

A 4.2 m diameter merry go round is rotating freely with an angular velocity of 0.8 rad/s. If its total moment of inertia is 1760 kg*m2, find the angular velocity of the merry go round when four people of 72 kg jump onto the edge of the merry go round. Treat the persons as ...
*Tuesday, August 4, 2015 by Anonymous*

**Physics**

A sanding disk with rotational inertia 0.0012 kg-m2 is attached to an electric drill whose motor delivers a torque of magnitude 13 N-m about the central axis of the disk. About that axis and with a torque applied for 39 millisecond, what is the magnitude of the angular momentum?
*Tuesday, August 4, 2015 by Anonymous*

**Physics**

A figure skater can increase her spin rotation rate from 26 rpm to 165 rpm. Given that her initial moment of inertia is 4.6 kg - m2, find her final moment of inertia.
*Tuesday, August 4, 2015 by Anonymous*

**Physics**

In what position will a converging lens of local length 10 cm from an image of luminous object on a screen located 50 cm from the object.
*Tuesday, August 4, 2015 by Rose*

**Physics**

A light Ray is incident at an angle of 45 degrees on one side of a glass plate of index of refraction 1.6. Find the angle at which the ray emerges from the other side of the plate
*Tuesday, August 4, 2015 by Gela *

**physics**

A projectile is fired from a cliff 300 m high with an initial velocity of 400 m/s. If the firing angle is 30 degrees from the horizontal, compute the horizontal range of the projectile.
*Monday, August 3, 2015 by Gela *

**physics**

In Example 5.8 in the text book, we investigated the apparent weight of a fish in an elevator. Now consider a 72.0 kg man standing on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.20 m/s in 0.80 s. It travels with ...
*Monday, August 3, 2015 by sacrevman*

**Physics**

A convex mirror (f1 = −6.30 cm) and a concave mirror (f2 = 9.50 cm) are facing each other and are separated by a distance of 24.0 cm. An object is placed between the mirrors and is 12 cm from each mirror. Consider the light from the object that reflects first from the ...
*Monday, August 3, 2015 by Ali *

**Physics**

A lighted candle is placed 38 cm in front of a diverging lens. The light passes through the diverging lens and on to a converging lens of focal length 10 cm that is 5 cm from the diverging lens. The final image is real, inverted, and 19 cm beyond the converging lens. Find the ...
*Monday, August 3, 2015 by Ali *

**physics**

In a gas two waves of length 1m and 1.10m have a frequency difference of 10/3 Hz, the velocity of sound is ? a) 166m/s b) 332m/s c) 83m/s d) 336.7m/s
*Monday, August 3, 2015 by Muqadas*

**Physics**

charges of -6nC and 4nC are 3m apart.(a)Determine the force they exert on each other.(b) the net electric field intensity at a point midway between them.
*Monday, August 3, 2015 by TechyBoy*

**Physics**

Force of 2.25N is acting on charge 15x10^-4C at any point. Find the Electric Field Intensity at that point.
*Monday, August 3, 2015 by Clifford*

**physics**

a stone projected horizontally from the top of a tower with a speed of 4m/s lands on the level ground at a horizontal distance 25m from the foot of the tower. calculate the height[g=10m/s2]. is it u squared divided by 2g
*Monday, August 3, 2015 by Emmanuel*

**physics**

I need to figure out how to calculate the speed time and acceleration for a jetpack to lift a 75kg man from ground. I am not sure what equations I need to use. I realize that gravity has to come in to play but other than that I am lost.
*Sunday, August 2, 2015 by jimmy*

**Physics**

A golfer hits a shot to a green that is elevated 2.90 m above the point where the ball is struck. The ball leaves the club at a speed of 19.1 m/s at an angle of 30.0˚ above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air ...
*Sunday, August 2, 2015 by Cassie*

**Physics**

A bullet of mass 10 g hits a target and penetrated 2 cm in to it if the average resistance offered by target is 100 N then the velocity with which the bullet hits the target is ?
*Sunday, August 2, 2015 by Tamanna*

**Physics kinematics**

The break of a car can slow it down from 60 miles per hour to 40 miles per hour in two secs how long it bring the car to a stop from an initial velocity of 25 miles per hour at the same acceleration
*Sunday, August 2, 2015 by Ggg*

**physics**

Find the partial pressure of nitrogen gas in the equatjon at one atmosphere atm Nitrogen+Oxygen gives Niticoxide
*Sunday, August 2, 2015 by Anonymous*

**physics**

Find the partial pressure of nitrogen gas in the equatjon Nitrogen+Oxygen gives Niticoxide
*Sunday, August 2, 2015 by Anonymous*

**Physics**

Consider the figure above, where a rigid beam of negligible mass and 10 m long is supported by a cable attached to a spring. When NO block is hung from the beam, the length L (cable-spring) is equal to 5 m. Assume that immediately after block (weight of 280 N) is hung at the ...
*Saturday, August 1, 2015 by Anonymous*

**physics**

a fan rotates speed of 600rev per min the power is cut it stopped after 60 rev find time
*Saturday, August 1, 2015 by mohit*

**Physics**

Consider the figure above consisting of three particles of mass m attached to a massless rod. Given an axis of rotation through point P, the rod rotates as shown in the figure. If the rod is released from rest in the horizontal position at t = 0. What is the angular ...
*Saturday, August 1, 2015 by Anonymous*

**Physics**

A small 700 g ball on the end of a thin, light rod is rotated in a horizontal circle of radius 1.5 m. Calculate the torque needed to keep the ball rotating at a constant angular speed if the air resistance experienced by the ball is 0.1200 N. Ignore the rods moment of inertia ...
*Saturday, August 1, 2015 by Anonymous*

**Physics**

A gymnast with a mass of 54 kg stands on the end of a uniform balance beam as shown in the figure. The beam is 5.00 m long and has a mass of 250 kg. Each support is 0.54m from the end of the beam. What is the force on the beam due to support 2? 0 ---------------------- I1 I2 0...
*Saturday, August 1, 2015 by Anonymous*

**Physics**

A softball player swings a bat, accelerating it from rest to 8 rev/s in a time of 0.3 s. Find the torque the player applies to one end of the bat. Approximate the bat as a 2.2 kg uniform rod of length 0.95 m.
*Saturday, August 1, 2015 by Anonymous*

**physics**

If a staircase has five steps each 1.45m high and 1.5m wide. A ball is placed on the top of the staircase what maximum (horizontal) velocity be given to the ball so that it directly hits the lowest plane?
*Saturday, August 1, 2015 by sunny*

**physics(kinematics)**

A police officer in a patrol car parked in a 70 Km/h speed zone observes a passing automobile might be intoxicated,the officer starts his car,accelerates uniformly to 90 Km/h in 8s ,and maintaining a constant velocity of 90 Km/h,overtakes the motorist 42s after the automobile ...
*Friday, July 31, 2015 by benjamin*

**physics**

Q:the lion chasing the monkey at speed of 5m/s and speed of monkey is 3 m/s the distance b/w them is 25m after how much distance it catches the monkey?
*Friday, July 31, 2015 by unknown*

**physics**

how many energy is transferred when 8.9g of liquid hydrogen changes to gas -253 degree celsius
*Friday, July 31, 2015 by rosel*