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January 24, 2017

Homework Help: Science: Physics

Recent Homework Questions About Physics

physics
Determine the melting temperature when 150.00g of ice at 0 degree celdius is mixed with 300g of water at 50 degree celsius?
Thursday, October 13, 2016 by elle saqs

Physics
A 5.00-kg block is placed on top of a 10.0-kg block which rests on a horizontal surface. The 5.00-kg block is tied to a wall with a horizontal string. A 45.0-N horizontal force directed away from the wall is then exerted on the 10.0-kg block. The coefficient of kinetic ...
Thursday, October 13, 2016 by Anonymous

physics
a ball rolls off the edge of a tabletop 1m above the floor and strikes the floor at a point 1.5m horizontally from the edge of the table. Find the (a) time of flight (b) initial velocity, (c) final velocity just before it strikes the floor. Plsssss help
Thursday, October 13, 2016 by Katty

physics
latent heat of fusion of ice is 3.36exp5 j/kg and its specific heat is 1200j/mole.k.. 2kg of ice is at -10degC how much ice will be melt when a heat of 1.42exp5 joule is provided completely? a) 0.5kg b) 1.5kg c) 2kg d) 1kg
Thursday, October 13, 2016 by shehzad

physics grade 11
how do i figure out how fast a car is going when all i know is frequency?
Thursday, October 13, 2016 by anon

Physics
A body starts from rest and accelerates to 2meter per second square for 6sec.it maintains this velocity for 10sec and then decelerates to rest in 4sec.calculate the acceleration
Thursday, October 13, 2016 by Gontorwon

physics
the speed of a certain wave is 3.00cm/s. if its frequency is 0.20hz, what are its wavelength and period
Thursday, October 13, 2016 by mark daniel

Physics
how long will it take a bullet fired from a cliff at an initial velocity of 700m per second at an angle of 30 Degree below the horizontal to reach the ground 200m below?answer
Thursday, October 13, 2016 by Abhinand Santhosh

physics
Each charge of 3 micro coulomb are placed at 3 corners of a square whose diagonal is 6cm long. Find the field intensity at the point of intersection of diagonals
Thursday, October 13, 2016 by bareera

Physics
A ball mass 1000g is drop from a height Of 5m and rebounded to a height Of 25 m. Find i it kintentic just before impact ii its intial rebounce velocity and kintentic and show the working.
Thursday, October 13, 2016 by Anonymous

Physics
A ball is thrown toward a cliff of height h with a speed of 31 m/s and an angle of 60∘ above horizontal. It lands on the edge of the cliff 3.4 s later. What is the ball's impact speed?
Wednesday, October 12, 2016 by Evan

Physics
Hello, I had a question for physics, and I tried it out, however, I got the wrong answer. The Question:If a rock takes 0.750s to hit the ground after being thrown down from a height of 4.80m, determine the rock's initial velocity. My Work : The formula- d=vi*t+1/2*a*t^2 ...
Wednesday, October 12, 2016 by Abigail

Physics
A ninety kilogram sofa is being pushed by four meters to the other side of a hall. After an initial push the sofa is pushed with a 600 N force. In this case, 0.6 is the coefficient of kinetic friction. What would be the magnitude and direction of the frictional force on the ...
Wednesday, October 12, 2016 by Anonymous

Physics
A car of mass 1530 kg traveling at 27.0 m/s is at the foot of a hill that rises 115 m in 4.40 km. At the top of the hill, the speed of the car is 6.0 m/s. Find the average power delivered by the car's engine, neglecting any frictional losses I got 8145.7 watts but that is ...
Wednesday, October 12, 2016 by Trish

Physics
When 20 kJ of heat is removed from 1.2 kg of ice originally at -15 C, what is the new temperature?
Wednesday, October 12, 2016 by April Hanna

Physics
A woman in a car on a level road sees an airplane traveling in the same direction that is climbing at an angle of 30 degrees above the horizontal. By driving 110 km/h she is able to stay directly below the airplane. What is the airplane's velocity?
Wednesday, October 12, 2016 by April Hanna

Physics
A 230-kg roller coaster reaches the top of the steepest hill with a speed of 5.20 km/h. It then descends the hill, which is at an angle of 25° and is 50.0 m long. What will its kinetic energy be when it reaches the bottom? Assume µk = 0.16 I'm not ...
Wednesday, October 12, 2016 by Bex

Physics
A record was set for stair climbing when a man ran up the 2100 steps of the Empire State Building in 15 minutes and 10 seconds. If the height gain of each step was 0.2 m, and the man's mass was 73.0 kg, what was his average power output during the climb I'm not sure ...
Wednesday, October 12, 2016 by Bex

Physics
What changed Newton's original work on the movement of the Moon around the Earth into the law of universal gravitation? 1) his conclusion that the same laws applied to all objects, no matter how small 2) his connection of gravitation to his first law 3) his connection of ...
Wednesday, October 12, 2016 by Sue

physics
a block slides down a frictionless ramp. at the bottom of the ramp is a vertical circular loop with a radius of 75 cm. from what minimum height does the block need to be released in order to make it around the loop?
Wednesday, October 12, 2016 by kassy

physics
a block sits on a frictionless inclined plane, attached to another block over a frictionless pulley. the angle of the incline is 20 degrees. what is the tension in the rope and the acceleration of the system? B) what is the speed of the system after the 2kg block has fallen ...
Wednesday, October 12, 2016 by kassy

Physics
An 84 kg child descends a slide 7.2 m high and reaches the bottom with a speed of 3.30 m/s. How much thermal energy (in joules) due to friction was generated in this process?
Wednesday, October 12, 2016 by Aidan

PHYSICS
A swimmer is capable of swimming at 1.4m at still water.caculate how far downstream will it smim across 180m?
Wednesday, October 12, 2016 by ABEL

physics
a golf club strikes a 0.045kg golf ball in order to launch it from the tee. For simplicity,assume that the average net force applied to the ball acts parallel to the ball's motion, has a magnitude of 6800N and in contact with the ball for a distance of 0.010m. with what ...
Wednesday, October 12, 2016 by kassy

Physics
A vector has negative x and y-components. The y-component is bigger than the x-component. Which of these is the only appropriate angle, measured from the +x axis, for this vector? Its either 190, 230, 125, 290, and 350. Im confused.
Wednesday, October 12, 2016 by Johnathan Zeringue

Physics(semiconductors)
Is electron and hole flow the same in a diode?is the following explanation correct .if not then please provide the correct one When diode is forward biased,the forward current is the sum of electron current and hole current.this current is diffusion current.the electron ...
Wednesday, October 12, 2016 by Plz help!!

physics
suppose if we put 5 kilogram weight on the each arm of a seesaw and it is in equilibrium position now if I apply 2 newton force on the corner of right arm of this seesaw side by side in horizontal direction then this force will be distributed equally or other arm weight will ...
Wednesday, October 12, 2016 by vikram

physics
The speed of sound in air is approximately 340 m/s. The speed of sound in steel is approximately 5900 m/s. If your friend strikes one end of a steel pipe with a hammer while you listen at the other end, you will hear two distinct sounds: one traveling through the air and the ...
Wednesday, October 12, 2016 by stuck

algebra homework help
A student missed 3 problems on a Physics test and received a grade of 94%. If all the problems were of equal value, how many problems were on the test? Round off your answer to the nearest integer. my answer is 5 questions
Wednesday, October 12, 2016 by jennifer

Physics
Hello, I had a question for physics, and I tried it out, however, I got the wrong answer. The Question:If a rock takes 0.750s to hit the ground after being thrown down from a height of 4.80m, determine the rock's initial velocity. My Work : The formula- d=vi*t+1/2*a*t^2 ...
Tuesday, October 11, 2016 by Abigail

Physics
An unknown substance at a temperature of 20 degrees Celsius is warmed up to 50 degrees when water at 80 degrees is added to it. Can I post this question. There is more information I have and the point is to find the specific heat of the unknown substance.
Tuesday, October 11, 2016 by Victor

physics
suppose a ball having 2 kilogram mass is closed in tube having 4 kilogram mass. what will be the velocity of 2 kilogram ball if we shake this tube side by side and this ball bounce back and rolling at the rate of .03 centimeter/second.
Tuesday, October 11, 2016 by vikram

Physics
A 50.0 kg skier with an initial speed of 12.0 m/s coasts up a 2.50 m high rise as shown in Figure 6.23. Find his final speed at the top, given that the coefficient of friction between her skis and the snow is 0.0800. (Hint: Find the distance traveled up the incline assuming a ...
Tuesday, October 11, 2016 by Zoe Jo

Physics
A particle moving at a velocity of 4.8 m/s in the positive x direction is given an acceleration of 3.4 m/s2 in the positive y direction for 4.4 s. What is the final speed of the particle? Answer in units of m/s.
Tuesday, October 11, 2016 by Holly

Physics
A 70 kg waterslide rider traveling at 15 meters per second hits a ramp with a 58 degree launch angle - How high will they fly?
Tuesday, October 11, 2016 by Paul

physics
a car starts from rest and accelerates uniformly to reach a speed of 21 m/s in 7.0s. What was the speed of the object after 2.0 seconds?
Tuesday, October 11, 2016 by liv

Physics
You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight is 770 N and that of your belongings is 1040 N. Determine the work done by the elevator in lifting you and your belongings up to the 6th floor (15.2 m) at a constant velocity. I solved...
Tuesday, October 11, 2016 by BrookeNeed

Physics
Josh is standing on the roof of the school 12 meters directly above James who kicks a soccer ball straight up with an initial velocity of 15 m/s. If Josh catches the ball on the way up, how long will the ball take to reach him? If he misses it on the way up and catches it on ...
Tuesday, October 11, 2016 by Jessica

Physics
Suppose Jessica drops a rock from a hot air balloon 200m above the water. how long does it take the rock to fall (a) the first 100 meters and (b) the second 100 meters?
Tuesday, October 11, 2016 by Jessica

Physics
A certain spring stores 35.0 J of potential energy when it is compressed by 9.2 cm. What is the spring constant?
Tuesday, October 11, 2016 by queck

Physics
Veronica hits a volleyball from a height of 0.4 m and gives it an initial velocity of 5.2 m/s straight up. a) How high, above the ground, will the volleyball go b) How long will it take the ball to reach its maximum height?
Tuesday, October 11, 2016 by Avery

physics
A fisherman is fishing from a bridge and is using a "51.0-N test line." In other words, the line will sustain a maximum force of 51.0 N without breaking. What is the weight of the heaviest fish that can be pulled up vertically, when the line is reeled in with an ...
Tuesday, October 11, 2016 by BrookeNeed

PHYSICS
a 75kg parent and a 22kg child meet at the center of an ice rink. they place their hands together and push hard enough to slide apart. a. is the force experienced by the child more than, less than, or the same force experienced by the parent? I said they experience the same ...
Tuesday, October 11, 2016 by JERRY

Physics
Hello, my problem is the next one: There are three objects that are launched at the Same time But with different angles( they describe proyectile motion ) . All the objects got the Same maximun height. My question is: Is the Initial velocity the Same for the three objects? Why...
Tuesday, October 11, 2016 by Arthur

Physics
5 kg of water at 40 degree Celsius is poured on a large block of ice at 0 degree celsius. How much ice melts?
Tuesday, October 11, 2016 by Li

physics
when one boy is sitting 1.20 meter from the center of he seesaw the girl must sit on the other side 1.50 meter from the center to maintain an even balance . however the boy carries an additional mass pf 14 kg and sit 1.80 meter from the center the girl must move to 3 meter ...
Tuesday, October 11, 2016 by shanel

physics
suppose a ball having 2 kilogram mass is closed in tube having 4 kilogram mass. what will be the velocity of 2 kilogram ball if we shake this tube at the rate of .03 centimeter/second.
Tuesday, October 11, 2016 by vikram

physics
when one boy is sitting 1.20 meter from the center of he seesaw the girl must sit on the other side 1.50 meter from the center to maintain an even balance . however the boy carries an additional mass pf 14 kg and sit 1.80 meter from the center the girl must move to 3 meter ...
Tuesday, October 11, 2016 by shan

physics
Calculate the effective value of g, the acceleration of gravity (in meters/second^2), at 8600 km above the earth's surface.
Monday, October 10, 2016 by kassy

physics
Find the force of gravity (in newtons) on a spacecraft 15100 km above the earth's surface, if its mass is 400 kg
Monday, October 10, 2016 by kassy

physics
A ball on the end of a string is revolving at a uniform rate in a vertical circle of radius 92.5 cm. If its speed is 4.50 m/s, and its mass is 0.335 kg, calculate the tension (in newtons) in the string when the ball is at the bottom of the path.
Monday, October 10, 2016 by kassy

AP Physics
A 5-kg box is placed on a frictionless ramp which is sloped at a 30-degree angle from horizontal. A rope attaches the box to a post further up the ramp. How much tension is in the rope?
Monday, October 10, 2016 by Bri

physics
What is the maximum speed (in meters/second) with which a 1400 kg car can round a turn of radius 300 m on a flat road, if the coefficent of friction between tires and road is 0.530 ?
Monday, October 10, 2016 by kassy

Physics
A machine has an IMA of 6.0 and an AMA of 5.0. What is the work input needed by the machine to raise a 40 kg load by 3.0 m?
Monday, October 10, 2016 by April Hanna

physics
One athlete in a race running on a long, straight track with a constant speed v1 is a distance d behind a second athlete running with a constant speed v2. Find the time t it takes the first athlete to overtake the second athlete, in terms of d, v1, and v2. At what minimum ...
Monday, October 10, 2016 by victora

Physics
A 54100 kg space ship has completed two thirds of its journey from the earth to the Moon. At this position, what magnitude force would the ship's engines have to supply to be the equilibrant? Assume the mass of the moon is 7.35E + 22 kg and the distance between the earth ...
Monday, October 10, 2016 by Sally

physics
a child saw a skunk in a hole of a tree, standing 2.5m away. the child attempted to throw a pebble into the hole but missed with a speed of 11m/s. Angle of elevation is 75 degree, what was the Vfy of the pebble.
Monday, October 10, 2016 by matt

physics
Tarzan plans to cross a gorge by swinging in an arc from a hanging vine. If his arms are capable of exerting a force of 1170 N on the rope, what is the maximum speed (in meters/second) he can tolerate at the lowest point of his swing? His mass is 83.0 kg, and the vine is 18.0 ...
Monday, October 10, 2016 by kassy

PHYSICS
a 75kg parent and a 22kg child meet at the center of an ice rink. they place their hands together and push hard enough to slide apart. a. is the force experienced by the child more than, less than, or the same force experienced by the parent? I said they experience the same ...
Monday, October 10, 2016 by Matt

Physics
A 221-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 27.7° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.811, and the log has an acceleration ...
Monday, October 10, 2016 by BrookeNeed

physics
A space station in the form of a large wheel, 173 m in diameter, rotates to provide an “ar- tificial gravity” of 6 . 6 m / s 2 for people located on the outer rim. Find the rotational frequency of the wheel
Monday, October 10, 2016 by Anonymous

physics
an 85kg concrete block rests on a flat surface with coefficient of static friction us=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block?
Monday, October 10, 2016 by why cant anyone solve this

physics
an 85kg concrete block rests on a flat surface with coefficient of static friction=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block?
Monday, October 10, 2016 by solve this i will love you for ever

Physics
a 50ml volume of gas is measured at 20 degree celsius,if the pressure remains constant what will be the volume of the gas at 0 degree celsius?
Monday, October 10, 2016 by Vianca

Physics
This is a multiple choice question: You toss a (wrapped) sandwich to a friend leaning out of a window 10 m above you, throwing just hard enough for it to reach her. At the same instant, she drops a silver dollar to you.At what position do the dollar and the sandwich pass each ...
Monday, October 10, 2016 by Tori

physics (question impossible to solve)
an 85kg concrete block rests on a flat surface with coefficient of static friction us=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block?
Monday, October 10, 2016 by help (sos)

Physics
The initial speed of a body is 4.43 m/s. What is its speed after 1.86 s if it accelerates uniformly at 1.24 m/s^2? Answer in units of m/s. PLz help
Monday, October 10, 2016 by Jina

physics
Scalar product of three vectors? Given:A=(axi+ajy+azk) B=(bxi+bjy+bzk) C=(cxi+cjy+czk)
Monday, October 10, 2016 by Abid

physics again
A Chinook salmon has a maximum underwater speed of 3.58 m/s, but it can jump out of water with a speed of 6.26 m/s. To move upstream past a waterfall, the salmon does not need to jump to the top of the fall, but only to a point in the fall where the water speed is less than 3....
Sunday, October 9, 2016 by Evette

physics
As a fish jumps vertically out of the water, assume that only two significant forces act on it: an upward force F exerted by the tail fin and the downward force due to gravity. A record Chinook salmon has a length of 1.50 m and a mass of 49.5 kg. If this fish is moving upward ...
Sunday, October 9, 2016 by Evette

Physics
Hello, I need that someone help me with this excersise. I have to calculate (USING INTEGRATION) the motion ecuation of a particle. The excersise give me the ecuation of the velocity that is v=14t-32 , the initial time t1=3 And the initial position of the particle: X1=25 My ...
Sunday, October 9, 2016 by Arthur

Physics
A spring with a spring constant of 22.0 N/cm has a block attached to one end and the other end is fixed. How much work does the spring do on the block if the spring is stretched from relaxed length by 6.8 mm as the block is moved? How much additional work is done by the spring...
Sunday, October 9, 2016 by Matt

physics
What changed Newton's original work on the movement of the Moon around the Earth into the law of universal gravitation? 1) his conclusion that the same laws applied to all objects, no matter how small 2) his connection of gravitation to his first law 3) his connection of ...
Sunday, October 9, 2016 by Betty

physics
This figure shows the force on a 0.1-kilogram mass at various distances from Earth. Notice that the force decreases as the square of the distance. Now, consider satellites A and B, both circling Earth. If A has ten times the mass of B but B is 1/10 of the distance to the ...
Sunday, October 9, 2016 by Sue

physics
An 76 kg satellite orbits a distant planet with a radius of 4500 km and a period of 280 min. From the radius and period, you calculate the satellite's acceleration to be 0.63 m/s2. What is the gravitational force on the satellite?
Sunday, October 9, 2016 by Jessica

physics (super hard)
a carnival ride is designed with seats that carry two people weighing 910.0 N each. the seats itself weights 630 N.each seat is connected to central spindle by one chain and rotates on a radios of 6.07 meters. the ride is designed to rotate fast enough that the seats swing out...
Sunday, October 9, 2016 by nick

physics
a grandfather clock is designed to have a pendulum which swings a mass at the end of the chain in a horizontal circular motion. the pendulum is designed to swing 7 degrees off of the vertical. the chain is 1.50 meters long and the maximum tension in the chain is 12.0 N. ...
Sunday, October 9, 2016 by nick

physics
an 85kg concrete block rests on a flat surface with coefficient of static friction us=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block? please help and show work
Sunday, October 9, 2016 by nick

physics
A boater wants to head straight across a river that has a current of 3 km/hr. If the top speed of the boat in still water is 4 km/hr. 1.find the direction the boat must travel into the current to go straight across the river? 2. How fast is the boat going straight across the ...
Sunday, October 9, 2016 by cliff

physics
A wire of length 20 cm and carrying a current of 2.5 A makes an angle of 30o with a magnetic field of strength 0.8 T. Calculate the magnitude of the force on the wire. My Working: F=BILSindeta F=0.8*2.5*0.2*sin30=0.2N is this correct?
Sunday, October 9, 2016 by Neman

Physics
A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 80 kg and the hill is inclines at 15 degrees with respect to the horizontal. Air resistance opposes the motion of the cyclist. Later, the bicyclist climbs the same hill at ...
Sunday, October 9, 2016 by Morgan

Physics
An 8 kg bowling ball creates air resistance according to F(air)=2.14v. The bowling ball is rolled off the top of the sears tower. a) Calculate the acceleration (magnitude and direction at 1) The top of the building____ 2)when the ball reaches 5.6 m/s_____ b) What is the ...
Sunday, October 9, 2016 by Morgan

physics
determine the minimum radios of a highway curve which has banking angle of 5.74% over which vehicles will travel at 110km/h. assume that there is no friction between the road and the tires. calculate the radios?
Sunday, October 9, 2016 by nick

Physics
If two springs have their spring constants as k1 and k2 (k1>k2 . When they are stretched by same force what will be the relation between their elongations
Sunday, October 9, 2016 by Kanishka

Physics
Ade throws a ball up to a height of 10m and catches it back. What is the Displacement of the ball
Sunday, October 9, 2016 by Ufuoma

Physics
Ade throws a ball up to a height of 10m and catches it back. What is the Displacement of the ball
Sunday, October 9, 2016 by Anonymous

physics
A parachutist bails out and freely falls 59 m. Then the parachute opens, and thereafter she decelerates at 1.6 m/s2. She reaches the ground with a speed of 2.5 m/s. (a) How long is the parachutist in the air? (b) At what height does the fall begin?
Sunday, October 9, 2016 by Anonymous

physics
a 1240 kg automobile stops in a distance of 41m. if initial velocity was 22.5m/s, what force did the road exert on the car to stop it? Answer pls... Thank You
Sunday, October 9, 2016 by b

physics
A 350N box is pulled along a horizontal pathway by a rope which makes an angle of 42degrees with the pathway. If a force of 250N is applied on the rope, what is the coefficient of sliding friction?
Sunday, October 9, 2016 by b

physics
Aljhumar is trying to arrange his room. He pushes an 80kg cabinet across the wooden room which resists the motion with a 300N force of friction. What is the coefficient of sliding friction between the cabinet and the floor?
Sunday, October 9, 2016 by b

physics
The coefficient of sliding friction between a 10kg rubber tire and wet concrete road is 0.43. Determine the time in which a moving object with a velocity of 35mi/h can come to a stop on the road. What distance is covered at this time?
Sunday, October 9, 2016 by b

physics
A 2.2kg bowling ball with a velocity of 2m/s rolls along a level floor for 30m before coming to a halt. What is the coefficient of rolling friction?
Sunday, October 9, 2016 by b

physics
What changed Newton's original work on the movement of the Moon around the Earth into the law of universal gravitation? 1) his conclusion that the same laws applied to all objects, no matter how small 2) his connection of gravitation to his first law 3) his connection of ...
Saturday, October 8, 2016 by Jessica

physics
Two spacecraft in outer space attract each other with a force of 4 N. What would the attractive force be if they were one-eighth as far apart?
Saturday, October 8, 2016 by Jessica

physics
A coordinate system (in meters) is constructed on the surface of a pool table, and three objects are placed on the table as follows: a m1 = 1.9-kg object at the origin of the coordinate system, a m2 = 3.4-kg object at (0, 2.0), and a m3 = 4.6-kg object at (4.0, 0). Find the ...
Saturday, October 8, 2016 by Evette

physics
You are working at a garden centre for the summer. You lift a bag of fertilizer with a force of 143 N, and it moves upward with an acceleration of 0.762 m/s2. a: how much does the fertilizer back weigh?
Saturday, October 8, 2016 by dolapo

physics
What is the acceleration due to gravity at a distance of one Earth radius above the Earth's surface
Saturday, October 8, 2016 by Kathy

physics
The engine of a locomotive exerts a constant force of 6.5 105 N to accelerate a train to 90 km/h. Determine the time taken for the train of mass 1.8 107 kg to reach this speed from rest.
Saturday, October 8, 2016 by dolapo

physics
How can the LIGO gravity wave detector achieve a measurement accurate to 1/1000 of a proton's diameter
Saturday, October 8, 2016 by Gorio

physics
Objects with masses m1 = 11.0 kg and m2 = 6.0 kg are connected by a light string that passes over a friction-less pulley as in the figure below. If, when the system starts from rest, m2 falls 1.00 m in 1.48 s, determine the coefficient of kinetic friction between m1 and the ...
Saturday, October 8, 2016 by Evette

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