Physics

Physics
This set of questions uses an interesting formula. A torque applied for a certain time causes a change in angular momentum. Torque * (delta t) = delta L Lindsey is on the merry-go-round again. Her mass is 33kg . The merry-go-round has a mass of 78kg and a radius of 2.20m. ...

What is the angular momentum of the Moon in its orbit around Earth? I assume I need the mass of the moon, radius of the moon, and angular velocity of the moon. Found those on google, plugged them into my formula (angular momentum = Iw) and got the wrong answer... I used moment...

As physics
Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Calculate the number of free electrons per metre length of ...

physics
a cylindrical metal strut that forms part of a landing gear of a jet aircraft has a diameter of 24mm and is 0.35m long.during landing the maximum compressive force reaches a value of 50kn Assuming that the elastic limit of the strut is not exceeded calculate the reduction in ...

As physics
the figure below shows the graph of force,F (y axis)acting on a trolley of 0.4kg against time,t (x axis) 20--------- ........._-- ........._...-- ........._....--- ........._......--- ........._.......----- 0........5............9 The velocity of the trolley is constant ...

Physics Help!
A skier wants to build a rope tow to pull herself up a ski hill that is inclined at 15 with the horizontal. Calculate the tension needed in the rope to give the skier's 54kg body a 1.2 m/s^2 acceleration.

Physics
A skier wants to build a rope tow to pull herself up a ski hill that is inclined at 15 with the horizontal. Calculate the tension needed in the rope to give the skier's 54kg body a 1.2 m/s^2 acceleration.

As physics
Silver plating: A student attempts the process of silver plating to determine the mass of a silver atom. a series of objects are measured, then electroplated for a measure period of time, while maintaining a steady current through a solution of silver nitrate in tap water. ...

As Physics
Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Two copper wires of diameter 1 mm and 2 mm are joined end to...

As Physics
Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Calculate the number of free electrons per metre length of ...

Physics Help
What is the angular momentum of the Moon in its orbit around Earth? I assume I need the mass of the moon, radius of the moon, and angular velocity of the moon. Found those on google, plugged them into my formula (Iw) and got the wrong answer...

A 33kg child named Lindsey runs as fast as she can and jumps onto the outer edge of a merry-go-round. The merry-go-round is initially at rest and has a mass of 78kg and a radius of 2.20m. Lindsey's linear velocity was 9 m/s at the moment she jumped onto the merry-go-round. ...

physics
Suppose you start an antique car by exerting a force of 300 N on its crank for 0.250s. What angular momentum is given to the engine if the handle of the crank is 0.300 m from the pivot and the force is exerted to create maximum torque the entire time?

Physics
A disc spins at a rate of 2 rps. There is a 15 g object on the disc located 10 cm away from the center. Find the object's tangential velocity and the frictional force that has to be exerted on the object to keep it from slipping off the disc. My answer: Tangential velocity = ...

Physics
Two planets, Planet 1 and Planet 2, orbit the same star. Planet 1 has a relative mass of 4x and a relative distance of x. Planet 2 has a relative mass of 3x and a relative distance of 2x. Which planet has a higher gravitational attraction to the star? I think this is Planet 1 ...

Physics
I really need some help here.please can someone explain the mechanism of electrical conduction in metals

Physics
The RAM of copper is 63.5g\mol and its density is 8.93×10^3kgm^3.in each cubic metre of the metal,there are 8.24×10^28free electrons. Calculate the number of free electrons contributed per atom

Physics
0.02kg of ice and 0.1kg of water at 0celsius are in a container. Steam at 100celsuis is passed in until all the ice just melted. How much water is now in the container?

physics
a bullet of mass 5.0g was fired at a stationary ball of lead. the head on impact moved the 10 kg ball at a velocity of .50m/s. of energy losses due heat the internal energy are ignored, what was the speed of the bullet?

physics
if an object is pushed along a rough horizontal surface and moves at a constant velocity, then...

physics
A liquid is under stream lined motion through a horizontal pipe of non uniform cross section of the volume rate of flow at cross section a is v the volume rate of flow at cross section a/2 is Ans:V

physics
Please reference the illustration at screenshots<dot>firefox<dot>​com/fDDGSaztdbf0b7Uh/brilliant<dot>​;org for the following problem: A bunch of bananas of total weight W is hung at one end of a string passing over a perfectly smooth pulley. At the...

math
In a class of 50 student, 25 offer mathematics, 22 offer physcis, 30 offer chemistry and all the student take at least one of these subjects , 10 offer physics and mathematics, 8 offer chemistry and mathematics , 16 offer physics and chemistry. (a) draw a venn diagram to ...

physics
An ice cube at its freezing point is placed in nested Styrafoam cups which contain 240 g of water at 21.5 °C. If the final equilibrium temperature when the last trace of ice melts is 25.0 °C, what was the mass of the ice cube?

physics
A 24.0 g metal cube at 85.5 °C is placed into a calorimeter containing 125 mL of water at 20.0 °C. The final equilibrium temperature of the metal cube and the water in the calorimeter is 24.8 °C. Determine the specific heat of the metal

Physics
A 2.5 kg falcon soaring at a height of 500 meters has a certain potential energy. Now suppose the falcon were carrying a 1.0 kg snake. What would the new height be if the total potential energy were to remain the same?

Physics
What is the height of a 2.00 kg object if its potential energy is 100 J?

Physics
Which has more potential energy: a 1.0 kg ball at a height of 10 m, or a 10 kg ball at a height of 1.0 m? Show all work.

Physics
How much potential energy is required to lift a 50 gram arrow to a height of 100 meters?

Physics
Calculate the potential energy of a 40 gram sparrow resting on a branch 30 feet above the ground. (Hint: 1 foot = 0.305 m)

Physics
Calculate the potential energy of a 6.3 kg eagle flying at a height of 75 m.

Physics
Calculate the potential energy of a 5.0 g (0.005 kg) paper airplane 5.0 meters above the ground

Physics
A rat experiences more inertia or a elephant

Physics
A train travels 30m/s then breaks are suddenly applied producing a retarding force equal to 1/10 of the weight of the train runs on the distance through which the train runs on the track before coming to rest in.

Physics
Why were two-prong outlets replaced with three-prong outlets?

Physics
How can grounding prevent property damage and harm, even death when lightning strikes?

physics
A liquid absorbs 45 kJ of heat, and its temperature increases from 305 K to 315 K. Determine the heat capacity of this liquid.

physics
An aluminum block absorbs 1.0 x 104 J of energy from the Sun when its temperature increases by 5.0 °C. What is the mass of the block? the specific heat capacity of aluminum is 920

Physics
A bead slides without friction around a loopthe-loop. The bead is released from a height of 18.6 m from the bottom of the loop-theloop which has a radius 7 m. The acceleration of gravity is 9.8 m/s 2 . 18.6 m 7 m A What is its speed at point A ? Answer in units of m/s.

Physics
I am curious how the earth work as an omnipresent conductive surface in an electrical distribution system?

Physics
It saves human life from the danger of electrical shock which can cause death, by blowing a fuse. How can “blowing a fuse” can rescue someone's life? Please answer. Thank you.

Physics
A 21kg crate is pushed across the floor at a constant velocity by a 350N force. Determine the coefficient of kinetic friction.

physics
A 4kg mass moves in a circular path of 7m radius on a frictionless horizontal table. It is attached to a string that passes through a frictionless hole in the center of the table. A second 87kg mass is attached to the other end of the string. Acceleration is 9.8 m/s^2. ...

physics
a plane is flying in a horizontal circle at 99.5 m/s. The 92.6 kg pilot does not want his radial acceleration to exceed 9.25g. What is the minimum radius of the circular path. The acceleration of gravity is 9.8 m/s^2.

Physics
A man pulls a bucket of water of mass 10kg from a well 5meter deep in 5 sec. Calculate the power of the man.

physics
a plane is flying in a horizontal circle at 99.5 m/s. The 92.6 kg pilot does not want his radial acceleration to exceed 9.25g. What is the minimum radius of the circular path. The acceleration of gravity is 9.8 m/s^2.

physics
A rotary speed of 2010 m/s. The rotating rod of 15.7 cm long. Assume the speed quoted is that of the end of the rod. What is the centripetal acceleration at the end of the rod?

physics
an arrow is shot at a 30 degree angle with the horizontal. it has a velocity of 49 m/s how high will the arrow go? what horizontal distance will the arrow travel? and how long will the arrow be in the air?

physics
Two cars start off a race with initial velocities u0 and v0, and travel in a straight line with uniform acceleration á and â. If the race ends in a dead beat, prove that the length s of the race is: s=(2(u_0-v_0)(u_0 â-v_0 á))/(â-á)^2

physics
state law of flotation

Physics
A satellite orbits Neptune 4000km above its surface. given the mass of Neptune is 1.02x10^26 kg and the radius of Neptune is 2.48x10^7m, Calculate the orbital speed of the satellite

physics
estimate number of impacts number of imapcts air molecule make with palm of your hand assuming all air is nitrogen molar mass =.0028

Physics
Mark's physics book is on the desk. Mark pushes horizontally (from the side) on the book, but the book does not move. Which force diagram represents the force on the physics book? You may neglect air resistance. a) A box with two arrows, one pointing up and one pointing down. ...

Physics
A ball thrown by Ginger is moving upward through the air. Which force diagram represents the forces on the ball? You may neglect the effects of air resistance. a) only down force b) only up force c) both forces d) both forces (but down is larger/longer). I am unsure if it is a...

Physics
As the distance between two masses increases, the gravitational force of attraction between them A. decreases*** B. increases C. remains the same Is this correct?

physics
A long time after the switch is closed, what is the current in the circuit? A long time after the switch is closed, what is the current in the circuit? - unanswered Check your answer Save your answer You have used 0 of 3 submissions #11B (3 points possible) A long time after ...

physics
a car of mass 1200 kg starts from rest, accelerates uniformly to a speed 4ms-1 in 2 seconds and continues moving at this constant speed in a horizontal straight line for additional 10s. the brakes are then applied and the car is brought to rest in 4s. a constant resistance ...

Physics
A horse of mass 187 kg pulls a cart of mass 200 kg. The acceleration of gravity is 9.8 m/s2 . What is the largest acceleration the horse can give if the coeﬃcient of static friction between the horse’s hooves and the road is 0.612? Answer in units of m/s2.

Physics
A block is released from rest on an inclined plane and moves 3.2 m during the next 3.9 s. The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the acceleration of the block? Answer in units of m/s2. The block is 12kg and the incline is 36 degrees.

Physics
a 4,500 kg roller coaster starts from the top of a 45 m hill with a velocity of 3m/s. The car travels to the bottom through a loop and continues up the next hill. The end of the roller coaster has a level surface that is 4m off the ground. Assume that there is no friction on ...

Physics
The Sound of Tissue is 1550m/s. What frequency ultrasound wave should you use to make sure you probe 65mm into the body?

Physics
A box is pushed by a 750 N force that acts at a 30 degree angle with a friction less surface.The force pushes a box that has a weight of 500N a distance of 15 meters. How much work is done on the box?

Physics
What acceleration would a 35 KG box have if we pushed it with a force of 275 N across a surface that has a coefficient of friction of .7?

Physics
A bowling bowl has a mass of 25 KG. What is the acceleration of the ball if an upward force of 110 N is applied?

physics As
Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge A piece of fuse wire has a diameter of 0.22mm and carries a ...

physics As
The current carriers in a piece of semiconducting material have a charge of 1.6 x 10^-19C. Calculate the number of charge carriers entering the material per second when the current is 3 microamps so 3 x 10^-6 amps. ? Please help and do it step by step all parts of questions ...

Physics
Two gliders on an air track collide in a perfectly elastic collision. Glider A has mass 1.1 kg and is initially travelling at a velocity of 2.7 m/s [E]. It collides head-on with glider B with mass 2.4 kg, travelling at a velocity of 1.9 m/s [W]. Determine the final velocity of...

Physics
A squid can propel itself by taking water into its body and then expelling it. A 0.60 kg squid expels 0.30 kg of water with a velocity of 20 m/s [S]. What is the speed of the squid immediately after expelling the water?

Physics
A football player of mass 103 kg running with a velocity of 2.0 m/s [E] collides head-on with a 110 kg player on the opposing team travelling with a velocity of 3.2 m/s [W]. Immediately after the collision the two players move in the same direction. Calculate the final ...

Physics
A tennis ball with mass 57 g is travelling at 25 m/s [S] when it is intercepted by a tennis racquet for 4.0 ms after which the ball travels at 32 m/s [N]. What is the impulse imparted by the tennis racquet?

physics
A copper Calorimeter of mass 150g,was half-filled with water of mass 300g and a temperature of 0°C.5g of ice of mass 0°C was added to the content, later some quantity of steam was passed into the mixture and the temperature rose by 20°C. Calculate the quantity of steam added.

physics
A block of mass 12 kg starts from rest and slides a distance of 7 m down an inclined plane making an angle of 40◦ with the horizontal. The coeﬃcient of sliding friction between block and plane is 0.4. The acceleration of gravity is 9.8 m/s2 . What is the net force on the ...

physics
The density of a gas is 1.25 kg m – 3 at N.T.P. Find the Root mean square velocity of its molecules.

Physics
The slope of a position vs. time graph represent's the object's... acceleration displacement position speed I thought the answer should be velocity, but that's not an option. Should it be displacement then?

Physics
When an object is moving at a normal speed, is it's weight larger than when it's stationary?

Physics
A force of 20.0 N gives an object an acceleration of 12.5 m/s2. What is the mass of the object?

Physics! Help!
Two planets of mass 3 x 1025kg are release from rest 1.5 x 1012 m apart. What is the speed of the planets when they are half this distance apart? Help! I've been stuck on this for a good bit! I cant seem to find a formula that can help me solve this! I can find the force but i...

As physics
Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Two copper wires of diameter 1 mm and 2 mm are joined end to...

As physics
Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Calculate the number of free electrons per metre length of ...

As physics
Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge A piece of fuse wire has a diameter of 0.22mm and carries a ...

As physics
The current carriers in a piece of semiconducting material have a charge of 1.6 x 10^-19C. Calculate the number of charge carriers entering the material per second when the current is 3 microamps so 3 x 10^-6 amps. ? Please help and do it step by step all parts of questions ...

As physics
change in mass___total charge_____no of elect for each of______delivered by_______rons pass objects_________circuit(eachtest)_(thrca​thod) ________________________________________​_____0.14____________144__________9 x 10^20___ 0.57_____________132__________8.25 x ...

physics
A ball thrown with a speed of 100m/s,attains a height of 150m (g is 9.8m/s2.Calculate (i) time of flight (ii)angle of projection

physics
Why air pressure in a car tyre increases during driving?

Physics
A 72 kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 12 m , and falls a total of 35 m . Calculate the maximum acceleration she experiences.

physics
a package is released from a helicopter flying horizontally at a constant soeed of 40m/s. the oackage takes 3.0s to reacg the ground. the effects of air resistance can be ignored. what are the horizontal and vertical speeds of the package just before it hits the ground?

Physics
The x component of vector is 5.3 units, and its y component is -2.3 units. The angle that vector makes with the +x-axis is closest to

physics
What is least count of a instrument.

physics
Consider classical electron orbit with radius 53pm (picometers) that has a magnetic moment equal to 2μB (the Bohr magneton). What is the current of that orbiting electron in A?

physics
What is specific heat

physics
Ratio of inertial mass to gravitational mass

physics
What is the ratio of inertial mass to gravitational mass.

Physics
A person exerts a force of 28 N on the end of a door 84 cm wide. What is the magnitude of the torque if the force is exerted a. perpendicular to the door? b. at a 45 degree angle to the face of the door? c. parallel to the door?

Physics
Dahnay Travels On A Bus To School.He Gets On The Onthe Bus Which Then Accelerates From Rest To 18m/s In 20secnds.The Bus Travelr At This Velocity For 60seconds.Tge Bus Slows Down And Comesto Rest In 15seconds.Itis Stationary For 30seconds While People Get Onthe Bus.The Bus ...

physics
In a uniform magnetic field, can an Amperian loop ever have a non-zero value

physics
Show that the atm.pressure of 1.013x10^5Pa will support (a)10.3m of water (b)760mmHg of Hg.If the density of water is 10^3kg/m3 and density of mercury is 13.6x10^3kg/m3.

Physics
A workman uses a wrench to apply a 100 N force at a distance 0.15 meters away from the center of a bolt. Calculate the torque created by this force.

Physics
A pendulum with a bob of mass 150 g has the same period as a thin rod (not massless) of the same mass and length 17 cm when the rod is pivoted about its end. What is the length of the pendulum?

physics
A NAL is dropped from rest at a height of 40 m after striking it losses 25% of its energy to what height does it rebound and what is the velocity at the highest point.

physics
a car is pared on a cliff overlooking the ocean on an incline that makes an angle of 24 below the horizontal. the negligent driver leaves the car in a neutral and emergency brakes are defective. the car rolls down the incline with a constant acceleration of 4 m/s^2 for a ...