Monday
July 25, 2016

Homework Help: Science: Physics

Recent Homework Questions About Physics

Physics
If the air temperature is the same as the temperature of your skin (about 30.0 oC), your body cannot get rid of heat by transferring it to the air. In that case, it gets rid of the heat by evaporating water (sweat). During bicycling, a typical 70.0kg person's body produces...
Monday, March 14, 2016 by Desperate Student

Physics
A nail driven into a board increases in temperature. If we assume that 88.6 % of the kinetic energy delivered by a 2.3-kg hammer with a speed of 7.80 m/s is transformed into heat that flows into the nail and does not flow out, what is the temperature increase in K of an 272 g ...
Monday, March 14, 2016 by Desperate Student

Physics
A copper cylinder is initially at 20.0 oC. At what temperature in oC will its volume be 0.39 % larger than it is at 20.0 oC? The linear coefficient of expansion of copper is 28.6x10-6¢XC-1
Monday, March 14, 2016 by Desperate Student

Physics
A small 0.13 g bug stands at one end of a thin uniform bar that is initially at rest on a smooth horizontal table. The other end of the bar pivots about a nail driven into the table and can rotate freely, without friction. The bar has mass 0.3 g and is 2.49 cm in length. The ...
Monday, March 14, 2016 by Desperate Student

Physics
An airplane propeller is 1.1 m in length (from tip to tip) and has a mass of 2.8 kg . When the airplane's engine is first started, it applies a constant torque of 8.1 N⋅m to the propeller, which starts from rest. What is the angular acceleration of the propeller? ...
Monday, March 14, 2016 by Desperate Student

Physics
A uniform disk with mass 6 kg and radius 1.8 m is pivoted at its center about a horizontal, frictionless axle that is stationary. The disk is initially at rest, and then a constant force 31.5N is applied to the rim of the disk. The force direction makes an angle of 35 degree ...
Monday, March 14, 2016 by Desperate Student

Physics
The mass of a star is 1.89·1031 kg and it performs one rotation in 28.9 days. Find its new period (in /days) if the diameter suddenly shrinks to 0.93 times its present size. Assume a uniform mass distribution before and after.
Monday, March 14, 2016 by Bristol

AP Physics
At their closest approach, Venus and Earth are 4.2x10^10m apart. The mass of Venus is 4.87x10^24kg, the mass of Earth is 5.97x10^24kg, and G=6.67x10^-11Nm2/kg2. What is the force exerted by Venus on Earth at that point?
Monday, March 14, 2016 by Anonymous

physics
A 313 μF defibrillator capacitor is charged to 4.94×103 V. When fired through a patients chest, it loses 95 % of its charge in 40 ms. What is the resistance of the patients chest?
Monday, March 14, 2016 by shawn

Calc/Physics
Find the following questions at the depth of 25\text{m}. The gravitational acceleration is g = 9.8\text{m/s}^2 and the density of water is \rho = 1000\text{kg/m}^3. a. Find the hydrostatic force on a square steel plate with sides 2\text{m} placed horizontally. Answer (in ...
Monday, March 14, 2016 by Paul

Physics
A 313 μF defibrillator capacitor is charged to 4.94×103 V. When fired through a patients chest, it loses 95 % of its charge in 40 ms. What is the resistance of the patients chest?
Monday, March 14, 2016 by Anon

Physics HW Plz help
What is the frequency of a blue light with a wavelength of 487nm?
Monday, March 14, 2016 by Student Lexi

Physics
Women and overweight people often experience backpain. Let us explore the reason for this. Assume the women has a weight of 60.0 daN before pregnancy. Suppose she gains 10.0 daN during pregnancy, due to weight of the fetus, placenta, amniotic fluid, etc. To make the ...
Monday, March 14, 2016 by vanessa

Physics
A train moving at a constant speed of 100km/h travels east for 40min, then 30o east of north for 20 min, and finally west for 30min. What is the train's average velocity for the trip? The answer is 30 km/h (E 40 N) but I keep getting 66.6 km/h (E 30 N) help please!
Monday, March 14, 2016 by lomonoyan

11th grade physics
Multiple choice (show your work if any):  1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart. The electric field is null at a point C of [AB] such that :  a) AC=50cm b) AC=10cm c) AC=20cm d) point C ...
Monday, March 14, 2016 by vicky

Physics
A car starts from rest accelerate uniformly until it reaches a velocity of 30m/s after 5s.it traves with uniform velocity for 15s and is being brought to rest in 10 with a uniform retardation.dEtermine the following (a) the acceleration of the car.(b) the retardation. (c) the ...
Monday, March 14, 2016 by Omotola

About Drama
1. Which of these sentences is using appositive phrase correctly? a. The Grand Canal, which is the oldest man-made waterway in the world, is still used today in China. **?? b. The Grand Canal in China is a man-made waterway, still used, that is the oldest in the world. c. The ...
Monday, March 14, 2016 by Etta

11th Grade physics
Multiple choice (show your work if any):  1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart. The electric field is null at a point C of [AB] such that :  a) AC=50cm b) AC=10cm c) AC=20cm d) point C ...
Monday, March 14, 2016 by vicky

physics 11th class
Calculate the power of a crane in watts which lifts a man of 100kg to a height of 10m in 20sec
Monday, March 14, 2016 by Naman

Physics
What amount of energy is needed to change 1 kg of O degrees Celsius ice to 10 degrees Celsius water?
Monday, March 14, 2016 by Logan

physics
Women and overweight people often experience backpain. Let us explore the reason for this. Assume the women has a weight of 60.0 daN before pregnancy. Suppose she gains 10.0 daN during pregnancy, due to weight of the fetus, placenta, amniotic fluid, etc. To make the ...
Monday, March 14, 2016 by tom

physics
After placing a 0.500 m dent in the landlords van, the two management students are told they and their 200 daN beer freezer have to go. The new ramp is inclined at an angle of 32.1 o relative to the horizontal. The coefficient of static friction between the freezer and the ...
Monday, March 14, 2016 by tom

11th grade physics
Multiple choice (show your work if any): 1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart. The electric field is null at a point C of [AB] such that : a) AC=50cm b) AC=10cm c) AC=20cm d) point C doesn't ...
Monday, March 14, 2016 by vicky

physics
A 13 gram sample of an unknown metal at 26.5°C is placed in a Styrofoam cup containing 50.0 grams of water at 88.6°C. The water cools down and the metal warms up until thermal equilibrium is achieved at 87.1°C. A 10 percent of heat lost by water is transferred ...
Monday, March 14, 2016 by Ehab

physics
figure 3.1 shows a rectangular concrete slab of weight 18000N. It rests on a brick wall and is the roof of a bus shelter. The concrete slab is 3.0 m wide. The wall is 2.5 m from the front of the concrete slab and 0.50 m from the back. The cables behind the shelter pull ...
Monday, March 14, 2016 by Atta

Physics
A concrete slab of mass 400 kg accelerates down a concrete slop inclined at 35degree. The kenetic friction b/n the slab and slope is 0.60.Determine the acceleration of block.
Monday, March 14, 2016 by Yaekob

physics
find the angle of projection at the horizontal range is twice the maximum height of a projecyile
Monday, March 14, 2016 by junoo

physics
When the ray of light travels from air to glass slab and strikes the surface of separation at 90 degree , then it ..........
Monday, March 14, 2016 by rohit

Physics
A 5000-Hz car horn is blasted while the car is moving at 35.0 m/s toward a dazed physics student (stationary). What is the frequency of the horn heard by the student. Assume the temperature is 0°C
Sunday, March 13, 2016 by Sneha

Physics
An airplane has a velocity of v=(5m/s)i + (4m/s)j at t1= 3s. For the time interval from t1=3 seconds to t2=13s the average acceleration is a= (.5m/s^2)i + (.2m/s^2)j. At 13s find the magnitude and direction of the velocity of the airplane.
Sunday, March 13, 2016 by Bobby

Physics
A grizzly bear is running at a speed of 25m/s with respect to a man. The man is running 20m/s with respect to a rock. What is the bears speed with respect to the rock. (ALL VELOCITIES ARE IN THE SAME DIRECTION AND POSITIVE)
Sunday, March 13, 2016 by Bobby

Physics
The size of Rutherford's atom is about 0.1 nm. (a) Calculate the attractive electrostatic force between an electron and a proton at that distance. (b) Calculate the electrostatic potential energy of that atom. Express the result in unit eV. (c) The size of Rutherford's...
Sunday, March 13, 2016 by Clara

Physics
What is the wavelength of light that can cause a transition of an electron in the hydrogen atom from the orbit with n = 6 to n = 8?(answer in µm)
Sunday, March 13, 2016 by Clara

Physics
The size of Rutherford's atom is about 0.1 nm. (a) Calculate the speed of an electron that moves around a proton, based on their electrostatic attraction, if they are separated by 0.1 nm. (answer in m/s) (b) Calculate the corresponding de Broglie wavelength for Rutherford...
Sunday, March 13, 2016 by Eduardo

Physics
How much energy is required to ionize hydrogen when it is in the state with n = 6? (answer in eV)
Sunday, March 13, 2016 by Eduardo

PHYSICS
Calculate for Bohr's atomic model the speed of the orbiting electron in the n = 7 state. (Answer in m/s)
Sunday, March 13, 2016 by Physics Lover

All about DRAMA! P.S. - Please check!
1. Which of these sentences is using appositive phrase correctly? a. The Grand Canal, which is the oldest man-made waterway in the world, is still used today in China. b. The Grand Canal in China is a man-made waterway, still used, that is the oldest in the world. c. The Grand...
Sunday, March 13, 2016 by Etta

physics
a horizontal spring is stretched from its equilibrium position when a force of 0.75kg acts on it. then a force of 1.5 kg is attached to the end of the end of the spring and pulled 4.5 cm along a frictionless table from the equilibrium position. the body is then released and ...
Sunday, March 13, 2016 by charles anderson

physics
After placing a 0.500 m dent in the landlords van, the two management students are told they and their 200 daN beer freezer have to go. The new ramp is inclined at an angle of 32.1 o relative to the horizontal. The coefficient of static friction between the freezer and the ...
Sunday, March 13, 2016 by tom

physics
Women and overweight people often experience backpain. Let us explore the reason for this. Assume the women has a weight of 60.0 daN before pregnancy. Suppose she gains 10.0 daN during pregnancy, due to weight of the fetus, placenta, amniotic fluid, etc. To make the ...
Sunday, March 13, 2016 by tom

Physics
A roadway for stunt drivers is designed for race cars moving at a speed of 95 m/s. A curved section of the roadway is a circular arc of 760 m radius. The roadway is banked so that a vehicle can go around the curve with the friction force from the road equal to zero. At what ...
Sunday, March 13, 2016 by SJ

Physics
A grizzly bear is running at a speed of 25m/s with respect to a man. The man is running 20m/s with respect to a rock. What is the bears speed with respect to the rock. (ALL VELOCITIES ARE IN THE SAME DIRECTION AND POSITIVE)
Sunday, March 13, 2016 by Bobby

Physics
An airplane has a velocity of v=(5m/s)i + (4m/s)j at t1= 3s. For the time interval from t1=3 seconds to t2=13s the average acceleration is a= (.5m/s^2)i + (.2m/s^2)j. At 13s find the magnitude and direction of the velocity of the airplane.
Sunday, March 13, 2016 by Bobby

Physics
Two metallic spheres of mass .001 kg hang from a point by .3 m strings. Each is given the same amount and sign of charge. After equilibrium is reached, they each make an angle of 20 degrees relative to the vertical. Determine the amount of charge in each sphere.
Sunday, March 13, 2016 by Robert

Descriptive Physics
You are standing 5 feet from one speaker and 14 feet from another. Both speakers are producing the same sound. If the combined sound from both speakers is especially loud at your location, which of the following could be the wavelength of the sound? Choose all that apply. 1 ...
Sunday, March 13, 2016 by Thomas

Physics
A falling rock has a speed of 1.5 m/s. What is the velocity of the rock when it hits the ground 5 seconds later? Give the magnitude and direction
Sunday, March 13, 2016 by Bob

Physics
In a double-slit experiment, the fourth-order maximum for wavelength of 450 nm occurs at an angle theta = 90. Thus it is on the verge of being eliminated from the pattern because theta cannot exceed 90. (a) What range of wavelengths in the visible range (400-700 nm) are not ...
Sunday, March 13, 2016 by Kristie

Physics
A body of mass 10g oscillates with Simple Harmonic Motion of amplitude 4cm and time period 0.50s. Calculate: a) The maximum acceleration. b) The maximum kinetic energy.
Sunday, March 13, 2016 by Alex

Physics
If the length of pendulum is 0.8+/-0.01m and time peroid is 2.5+/-0.012 sec. Then percentage error in acceleration due to gravity will be
Sunday, March 13, 2016 by Anonymous

physics
The threshold wavelength for photoelectric emission in metal is 600 nm.Find the maximum kinetic energy of the electrons emitted when it is exposed to the wavelength 200 nm
Sunday, March 13, 2016 by Anonymous

physics
a ball of mass 0.1 is thrown up with an initial velocity of 80m/s calculate the potential energy half way up
Sunday, March 13, 2016 by junoo

Physics
A partide of mass m moves along a trajectory given by x= a cos δ1 t and y = asinδ2 t . Find rand y component of the force acting on the patde, potential energy, kinetic enenev of the partide and hence show that the total energe E= KE + PE =1/2 m(a*2 δ1*2+ b*2 &#...
Sunday, March 13, 2016 by jojo

Physics
A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of the ring. The ring ...
Sunday, March 13, 2016 by jojo

Physics
What is the difference between gravitational potential energy and electric potential energy?
Sunday, March 13, 2016 by MeritGodwin

Physics
A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of the ring. The ring ...
Sunday, March 13, 2016 by jan

Physics
A partide of mass m moves along a trajectory given by x= a cos δ1 t and y = asinδ2 t . Find rand y component of the force acting on the patde, potential energy, kinetic enenev of the partide and hence show that the total energe E= KE + PE =1/2 m(a*2 δ1*2+ b*2 &#...
Sunday, March 13, 2016 by jan

physics
determine the kinetic energy of a boy mass 40kg running with velocity of 3m/s
Sunday, March 13, 2016 by energy

Physics
You stand on a frictionless platform that is rotating with an angular speed of 3.9 rev/s.Your arms are outstretched, and you hold a heavy weight in each hand. The moment of inertia of you, the extended weights, and the platform is 7 kg · m2. When you pull the weights in...
Sunday, March 13, 2016 by Luhan

Physics
A woman with mass of 57 kg stands at the rim of a horizontal table having a moment of inertia of 570 kg m2 and a radius of 1.5 m.The turntable is initially at rest and is free to rotate about a frictionless, vertical axis through its center. The woman then starts walking ...
Sunday, March 13, 2016 by Luhan

Physics
A thin uniform cylindrical turntable of radius 2.1 m and mass 18 kg rotates in a horizontal plane with an initial angular speed of 8 rad/s. The turntable bearing is frictionless. A clump of clay of mass 5.5 kg is dropped onto the turntable and sticks at a point 0.9 m from the ...
Sunday, March 13, 2016 by Luhan

physics
a ball of mass 0.1kg is thrown vertically upwards with an initial velocity of 80m/s.calculate the potential energy (I) half way up (ii) at its maximum height.what is the kinetic energy as it leaves the ground
Sunday, March 13, 2016 by stephen

Physics
A non-reflecting single layer of a lens coating is to be deposited on a lens of refractive index n = 1.7. Determine the refractive index of a coating material and the thickness required to produce zero reflection for light of wavelength 540 nm.
Sunday, March 13, 2016 by Lowes

physics
Explain the difference between a GET and MOSFET on the basis of their construction and working
Sunday, March 13, 2016 by umesh

Physics
A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of the ring. The ring ...
Saturday, March 12, 2016 by fatma999

Physics
A partide of mass m moves along a trajectory given by x= a cos δ1 t and y = asinδ2 t . Find rand y component of the force acting on the patde, potential energy, kinetic enenev of the partide and hence show that the total energe E= KE + PE =1/2 m(a*2 δ1*2+ b*2 &#...
Saturday, March 12, 2016 by fatma999

Physics
A 1000kg car is driving toward the north along a straight horizontal road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest uniformly in a distance of 150 m. What is the magnitude applied to the car to bring it to rest?
Saturday, March 12, 2016 by Anonymous

Physics
Hi, I am having difficulties approaching and solving the following question: A Michelson interferometer is used with red light of wavelength 632.8 nm and is adjusted for a path difference of 20 µm. Determine the angular radius of the a) first (smallest diameter) ring ...
Saturday, March 12, 2016 by Brandon Tom

Physics
A solid sphere of uniform density starts from rest and rolls without slipping a distance of d = 4.8 m down a θ = 36° incline. The sphere has a mass M = 3.2 kg and a radius R = 0.28 m. If there is no frictional force, what is the translational kinetic energy of the ...
Saturday, March 12, 2016 by Kyle

PHYSICS
Nate the Skate was an avid physics student whose main non-physics interest in life was high-speed skateboarding. In particular, Nate would often don a protective suit of Bounce-Tex, which he invented, and after working up a high speed on his skateboard, would collide with some...
Saturday, March 12, 2016 by Jacob

Physics
An unfortunate astronaut loses his grip during a spacewalk and finds himself floating away from the space station, carrying only a rope and a bag of tools. First he tries to throw a rope to his fellow astronaut, but the rope is too short. In a last ditch effort, the astronaut ...
Saturday, March 12, 2016 by Jacob

Physics
A bullet of mass 0.01kg Is fired into a sandbag of mass 0.49kg hanging from a tree. The sandbag, with the bullet embedded into it, swings away at 10m/s.find a)the momentum after collision b)the momentum before collision c)the velocity of the bullet. ILOVE ALL OF YOU
Saturday, March 12, 2016 by Yaekob

Physics
Hi I am having difficulty with this question: Consider a simple “system” of a thin lens with focal length 12 cm, an input plane at 25 cm in front of the lens and an output plane at 11 cm beyond the lens. a) Find the matrix for the simple system b) Why is B = 0 in ...
Saturday, March 12, 2016 by John J.B

PHYSICS
A missile is fired with a launch velocity of 15000 ft/s at a target 1200 miles away. How long after it is fired will the target be hit? Use g = 32 ft/s.s Express your answer in seconds.
Friday, March 11, 2016 by Jhun Sanchez

Physics
How much work does it take for the average person (Weight = 700 N) to climb a 10-story tall building (consider each story to be about 3 m)? What fraction is this of the energy in a typical candy bar? (Ecandy bar = 250 Calories and 1 Calorie = 4186 Joules)
Friday, March 11, 2016 by Janiqua

physics
a box of mass 10kg is at rest on a horizontal plane.a force of 20N is applied to it at 30 degrees to the plane.assuming there no frictional force between the box and the plane,calculate the acceleration of the box.
Friday, March 11, 2016 by Misheck

Physics
At a busy intersection a 1460-kg car traveling west with a speed of 12 m/s collides head-on with a minivan traveling east with a speed of 9.4 m/s. The cars stick together and move with an initial velocity of 1.5 m/s to the east after the collision. What is the mass of the ...
Friday, March 11, 2016 by Alana

Physics
A missile is fired with a launch velocity of 15000 ft/s at a target 1200 miles away. At what angle must it be fired to hit the target? Use g = 32 ft/s.s
Friday, March 11, 2016 by Ben

Physics
A motorcycle stunt rider rides off the edge of a cliff. Just at the edge his velocity is horizontal, with magnitude of 9 m/s. Find the motorcycle's position from the edge of the cliff afyer 0.5 s. Use g = 9.8 m/s.s
Friday, March 11, 2016 by Bentong

Physics
A bomb is dropped from an airplane travelling horizontally with a speed of 300mph. If the airplane is 10000 ft above the ground, how far from the target must it be released? Use g = 32 ft/s.s Express your answer in miles.
Friday, March 11, 2016 by Bentong

physics
At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 0.20%? At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 2.0%? At what height above Earth's surface ...
Friday, March 11, 2016 by please help

Physics
A pool ball of mass 100g and velocity [5,-4]m/s collides with a stationary pool ball of the same mass. After the collision, the pool balls have velocites [2,-3]m/s and [3,-1]m/s. Is the collision elastic? Explain your answer.
Friday, March 11, 2016 by Sam

Physics
A pendulum bob has a mass of 1kg. The length of the pendulum is 2m. The bob is pulled to one side to an angle of 10degree from the vertical. What is the velocity of the pendulum bob as it swings through it's lowest point? What is angular velocity?
Thursday, March 10, 2016 by Sam

Physics
A ball of mass 500g is kicked into the air at angle of 45degree. It reaches a height of 12m. What was it's initial velocity?
Thursday, March 10, 2016 by Sam

Physics (Kinematics)
In the same instant that a Porsche races past him at 130 km/h, a speed cop gets off his motorcycle, accelerates uniformly at 8 m/s^2, to catch the speedster. After 5 seconds the trafic officer reaches his top speed, which he then maintains until he reaches up to the car. How ...
Thursday, March 10, 2016 by Jonathan Nokhoya

Physics
An airplane pilot checks her instruments and finds that the air speed of the plane is 325 km/h. the instruments show that the plane is pointed in a direction (S 30 W). A radio report indicates that the wind velocity is 80 km/h (W). What is the velocity of the plane relative to...
Thursday, March 10, 2016 by lomonoyan

physics
A binary star consists of two dense sphereaty masses of 10rest power 30 kg and 2 x 10rest power 30kg. Whose centres are 10rest power7km apart and which rotate togethe with angula velocity w about an axis which intersects a line joining their centres - show that if the only ...
Thursday, March 10, 2016 by ugochukwu

Physics
A 30-gram bullet leaves a gun barrel with a speed of 230 m/s. (a) What work is done on the bullet while it is in the gun barrel? (b) If the gun is 0.60m long, what is the average force on the bullet?
Thursday, March 10, 2016 by DeezNutz

Physics (Inside the atom)
A sample of radioactive isotope I is to be used for medical diagnosis of the kidneys. The isotope has a half-life of 8.0 days, and the sample is required to have an activity of 8 x 10^5 per second at the time it is given to the patient. Calculate the mass of the I-131 present ...
Thursday, March 10, 2016 by Hannah

Physics
a speeding car is driving at 120 km/h when it passes a police cruiser that is driving at 100 km/h. One second later, the police cruiser accelerates uniformly at 15 km/h until it reaches a speed of 135 km/h. how long does it take the police cruiser to catch the car
Thursday, March 10, 2016 by John

physics
An object is placed (a) 6cm (b) 20cm from a thin convex lens of focal length 10cm. Determine the nature, position and magnification of the image in each case.
Thursday, March 10, 2016 by ugochukwu

Physics
a tennis ball has mass 0.045 kg and is hit at a speed of 120 km/h by the server. the opposing player hits the ball exactly back along the line of its trajectory giving the ball a new speed of 115 km/h. if the contact time between the racquet and the ball is 0.02s what is the ...
Thursday, March 10, 2016 by Anonymous

Physics
during a snowball fight two balls with masses of 0.28 and 0.75 kg, respectively , are thrown in such a manner that they meet head-on and combine to form a single mass. the magnitude of initial velocity for each is 15 m/s. what is the speed of the combined mass immediately ...
Thursday, March 10, 2016 by Anonymous

Physics
a 6 kg mass with an initial velocity of 7 i m/s collides and sticks to a 5 kg mass with an initial velocity of v j m/s. the direction of the final velocity of the two masses with respect to the direction of the x axis is -15 degrees. what is v?
Thursday, March 10, 2016 by Anonymous

physics
a)find the charge to mass ratio for an electron accelerated through 600v in a magnetic field of strength 45mT where the speed of the electrons is 1.4*10^7m/s b)what is the percentage difference b/n your result and the accepted ratio with the value q=1.6*10^-19C and m=9.11*10^-...
Thursday, March 10, 2016 by ruth

Physics
A police car approaches a large wall at 51m/s. Its siren emits a 980 Hz signal. What is the frequency of the reflected sound observed by the officer?
Thursday, March 10, 2016 by maryam

physics
an electron moves in the plane of paper toward the top of the page .a magnetic field is also in the plane of the page and directed toward the right .what is the direction of the magnetic force on the electron ?
Thursday, March 10, 2016 by ruth

physics
At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 0.20%? At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 2.0%? At what height above Earth's surface ...
Thursday, March 10, 2016 by lizbeth

Physics
Suppose a 300–g kookaburra (a large kingfisher bird) picks up a 84.0–g snake and raises it 2.30 m from the ground to a branch. How much work did the bird do on the snake? I know that W=deltaPE, and PE=mgh. I keep getting 1046.64. Please help!
Thursday, March 10, 2016 by Emily

Physics
a 45-kg box initially at rest is being pushed with a force of 950 N along a frictionless horizontal surface. What is the speed of the boz after traveling a distance of 2.0m
Thursday, March 10, 2016 by Thea

Physics
An image formed by a convex mirror (f = -24.0 cm) has a magnification of 0.150. Which way and by how much should the object be moved to double the size of the image?
Thursday, March 10, 2016 by zhel

  1. Pages:
  2. <<Prev
  3. 10
  4. 11
  5. 12
  6. 13
  7. 14
  8. 15
  9. 16
  10. 17
  11. 18
  12. 19
  13. 20
  14. 21
  15. 22
  16. 23
  17. 24
  18. Next>>

Homework Help: Science