physics

Questions and answers by visitors named physics

Questions (197)

please check my answerAn electron moves north at a velocity of 9.8 * 10^4 m/s and has a magnetic force of 5.6 * 10^-18 N west
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2. 4,464 views
the maximum height a typical person can jump from a crouched start is about 60cm. By how much does the gravitational potential
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2. 1,946 views
A car tire of radius 45cm turns at a constant 14 rads/s. For a point on the edge calculatea) the tangential V b) the tangential
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2. 528 views
A hydrogen atom is in its elevnth excited state, n = 12. Using the Bohr model of hydrogen, find the linear momentum.You want to
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2. 798 views
The sound emitted by bats has a wavelength of 3.0 mm. What is the sound's frequency in air?how do i do this??
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2. 1,058 views
In a constant-volume process, 211 J of energy is transferred by heat to 1.05 mol of an ideal monatomic gas initially at 303 K.(a
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2. 410 views
In a constant-volume process, 211 J of energy is transferred by heat to 1.05 mol of an ideal monatomic gas initially at 303 K.(a
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2. 447 views
I need help with solving these word problems.Marion rides her racing bicycle @ speed of 8 m/s. Bicycle wheels have a radius of
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2. 573 views
I need help with solving these word problems.Marion rides her racing bicycle @ speed of 8 m/s. Bicycle wheels have a radius of
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2. 831 views
What gives?projectile launched @ 10.0 m/s @ 45.0 degrees figured everyhting out go these three points I'm trying to apply my
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2. 428 views
please my post from earlier
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2. 357 views
i have to build a catapult that will fire a projectile that will pass a 1m tall wall 1 m away from starting point and land in a
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sigh this is killing me here...ok rockets launch at 250 m/s @ an angle of 75.0 degrees. There's a mountain 2500m away from
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2. 318 views
sigh this is killing me here...ok rockets launch at 250 m/s @ an angle of 75.0 degrees. There's a mountain 2500m away from
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2. 335 views
please answer my question below
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2. 223 views
A box slides down a 30.0 degree ramp with an acceleration of 1.20 m/s^2. Determine the coefficient of kinetic fiction between
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2. 802 views
A 2.0 kg mass starts from rest and slides down an inclined plane 8.0 X 10^-1 m long in .50s. what net force is acting on the
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2. asked by physics
3. 13,603 views
A 5.0 kg bucket of water is raised form a well by a rope. If the upward acceleratiopn of the bucket is 3.0 m/s^2 find the force
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2. 1,998 views
A certain radio wave has a frequency of 2.0 * 10^6 Hz.what is its wavelength?
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2. 360 views
here is my question: A bullet with a mass of 6.00 g is fired through a 1.25 kg block of wood on a frictionless surface. The
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2. 1,855 views
find the final equilibirum temperature when 10.0 g of milk at 10.0degC is added to 1.60*10^2 g of coffee with a temperatrure of
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2. 1,171 views
here is my problem:a concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. if the
1. 1 answer
2. 464 views
here is my problem:a concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. if the
1. 1 answer
2. 431 views
please check these:a laser can be used a. to treat glaucoma b. to measure distance c. to read bar codes d. all of the above D in
1. 4 answers
2. 1,573 views
here is my problem:a concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. if the
1. 3 answers
2. 1,418 views
please help:A repelling force occurs between two charged objects when the charges are of a. unlike signs b. like signs c. equal
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2. 1,243 views
how would i go about solving this problem?what formula shoud i use? can you please show me in steps how to do this, thanks a
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2. 1,632 views
pleaase help me with this,i'm very bad in physics, and i mostly don't understand any of this stuff...can anyone explain as well
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2. 1,080 views
please check these for me:What is the wavelength of microwaves of 3.0*10^9 Hz frequency? a. 0.050m b. 0.060m c. 0.10 m d. 0.20 m
1. 4 answers
2. 2,207 views
please check these for me:If atmospheric refraction did not occur, how would the apparent time of sunrise and sunset be changed?
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2. 2,076 views
please check these for me:When a positive charge moves in the direction of the electric field, what happens to the electrical
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2. 707 views
what would be the appropriate answer choice for this question:If the batteries in a portable CD player provide a terminal
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2. 446 views
If atmospheric refraction did not occur, how would the apparent time of sunrise and sunset be changed?a. both would be later b.
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2. 1,163 views
i can not find the correct answer for this onei got D but someone siad its wrogn electric field strength depends on a. charge
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2. 420 views
i'm still getting C as the answer to this onedrwl said its wrong When a positive charge moves in the direction of the electrical
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2. 904 views
please check these 3:if the batteries in a portable CD player provide a terminal voltage of 12 V, what is the potential
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2. 1,102 views
drwls said this is wrong but i don't know what's correctthe enregy gained by electrons as they are accelerated by an electric
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2. 425 views
checkwhich of the following modifications to a solenoid would be most likely to decrease the strength of its magnetic field? a.
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2. 2,854 views
according to Lenz's law, the magnetic field of an induced current in a conductor willa. enhance the applied field b. heat the
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2. 2,698 views
please check these:A concave mirror with a focal length of 10.0 cm creates a real image 30.0 cm away on its principal axis. How
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2. 1,672 views
please check this one question:Which interaction of nature binds atoms and molecules by attracting unlike charges and repulsing
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2. 408 views
If you stand 3.0 m in front of a flat mirror, how far away from you would yourimage be in the mirror?6.0 m If light waves are
1. 2 answers
2. 931 views
A concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. If the corresponding object is
1. 3 answers
2. 2,532 views
is this done correctly?A step-down transformer has 16000 turns on the primary and 95 turns on the secondary. If the rms emf
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2. 863 views
please check these:Which interaction of nature binds atoms and molecules by attracting unlike charges and repulsing like
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2. 714 views
there is a figure that looks kind of like this:E6--------------------- E= -0.378eV E5--------------------- E= -0.544eV
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2. 2,210 views
An elevator weighing 2.00*10^5 N is supported by a steel cable. What is the tension in the cable when the elevator is
1. 4 answers
2. 4,569 views
can you check this :a repelling force occurs between two charged objects when the charges are of a. unlike signs b. like signs
1. 6 answers
2. 7,332 views
The critical angle of refraction for calcite is 68.4 degrees when it forms aboundary with water. Use this information to
1. 3 answers
2. 2,958 views
Monochromatic light from a helium-neon laser (wavelength=632.8 nm) shines at a right angle onto the surface of a diffraction
1. 3 answers
2. 2,554 views
A certain radio wave has a frequency of 2.0*10^6 Hz. What is its wavelength?c=3*10^8 m/s wavelength = 3*10^8 _______ 2*10^6 =
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2. 2,942 views
please check this:When a glass rod is rubbed with silk and becomes positively charged, a. electrons are removed from the rod b.
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2. 631 views
please check this:Which sentence best describes electrical conductors? a. electrical conductors have low mass density b.
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2. 4,112 views
please check:Conductors can be charged by ___, while insulators cannot. a. grounding b. induction c. polarization d. contact D
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2. 2,495 views
please check:Two point charges, initially 1 cm apart, are moved to a distance of 3 cm apart. By what factor do the resulting
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2. 3,692 views
please checkWhich of the following is NOT a characteristic of electrical potential energy? a. it is a form of mechanical energy
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2. 978 views
please check:A battery converts what type of energy into electrical energy? a. mechanical b. nuclear c. solar d. chemical D When
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2. 2,410 views
What effect will be produced on a capacitor if the separation between the plates is increased?a. it will increase the charge b.
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2. 1,233 views
pleae checkHow is current affected if the time interval over which the charge passes through a given area decreases while the
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2. 468 views
two point charges are 10.0 cm apart and have chargeso of 2.0 uC (micro)and -2 uC, respectively. What is the magnitude of the
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2. 1,451 views
The potential differnece across a resistor is 4.4 * 10^2 V. If the resistance of the resistor is 1.8 k ohms, how much current
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2. 782 views
two point charges are 10.0 cm apart and have chargeso of 2.0 uC (micro)and -2 uC, respectively. What is the magnitude of the
1. 2 answers
2. 1,177 views
please tell me if thsi si correctTwo equal charges are separated by 3.7 * 10^-10 m. the force between the charges has a
1. 2 answers
2. 557 views
please tell me if this is correct,A step-down transformer has 16000 turns on the primary and 95 turns on the secondary. If the
1. 2 answers
2. 1,003 views
tinyurl--qwxgbv(The qwxgbv is after the slash) The proton moves through a magnetic field of magnitude 3x10^-5 T with a velocity
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2. 442 views
1. a centripetal-acceleration addict rides in uniform circular motion with period T=2s and radius r=3m. at t1 his acceleration
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2. 1,822 views
The question is: a horizontal force of magnitude 22.0 N is applied to a 2.86 kg book as the book slides a distance d = 0.73 m up
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2. 506 views
a = m2^-1 (m1 a) -gsolve for acceleartion it's the same post below they cancel out
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2. 221 views
m2a=m2g-m1am2a+m1a=m2g a= m2g/(m1+m2) I got this m2a=m2g-m1a m2a + m1 a = m2g-m1a + m1 a m2 a + m1 a = m2g (m2 a + m1 a = m2g(m2
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2. 602 views
a block (mass m1) on a smooth horizontal surface, connected by a thin cord that passes over a pulley to as second block (m2),
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2. 1,548 views
I'm trying to rearange this equationfor Mu s That is the greek letter Mu subscript s... the static coeficent of friction m2 = m1
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2. 411 views
ok if a car is going around a bank curve my book is telling me there is an ideal spead were no friction is required at all for
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2. 459 views
so I got a question about projectile motiontake the example of shooting of a plastic air rocket into the air and asked to
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2. 531 views
thanks for the help earlierjust got a question I'm taking AP Physics B this year does that mean next year I would Take AP
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2. 809 views
i have a question in my bookcentripetal acceleration = r^-1 v^2 ok I agree but in my book acceelration is labeled as a vector
1. 3 answers
2. 1,149 views
ok a person is holding onto a piece of stringat the end of the string is a ball the person whrils it around in a circle i've
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2. 533 views
does the slope of a distance vs. time graph showthe average velocity or the instaneous velocity I'm asked the question and don't
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2. 574 views
ok i'm doing a labwere walking different displacements I observed that the displacements were on different grades of steepness
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2. 521 views
ok i saw the responses thanks still a little bit confusedok what variable is different or varaies in the sitations were you to
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2. 298 views
Hi i'm doing that lab were you attach a weight to a tape which is also through a timer that puts marks on the tape at a given
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2. 490 views
"The actual value of computed g, assuming no drag, also varies somewhat over the earth's surface due to the earth's spin (which
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2. 1,027 views
take a satalite going around the earth...what allows us to say net force (radial) = Fg = Fr = ma were the Fg is the force of
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2. 641 views
what is the equal and opposite force the force of frictionlike if a block is at rest on a table static friction is stil exerted
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2. 455 views
A coin is placced 12.0 cm from the axis of a roatating turntable of variable speed. When the speed of the turntable is slowly
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2. 617 views
A rope of negligible mass passes over a puley of a negligible mass attached to the ceiling. One end of the rope is held by
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2. 1,230 views
Calculate the acceleration due to gravity on the moon. The moon\'s radius is about 1.74 E 6 m and its mass is 7.35 E 22 kgok
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2. 2,082 views
we can say that the force of gravity is equal to mass times acceleration were the acceleration is equal to gravity sense gravity
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2. 966 views
pleaseh t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 5 2 8 9 5 3 6 7
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Let ->V1= -6.1 ihat + 8.0 jhat and ->V2 = -4.8 jhat + 4.2 ihat.Determine the direction of ->V1 counterclockwise from the +x
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2. 482 views
At t= 0, a particle starts from rest at x= 0, y= 0, and moves in the xy plane with an acceleration ->a = (4.0ihat+
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2. 1,522 views
An airplane is heading due south at a speed of 590 km/h. If a wind begins blowing from the southwest at a speed of 65.0 km/h
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2. 7,509 views
What is the best idea for an egg drop project. it has to survive a 5 meter drope without craking or breaking open.(grade A egg
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2. 678 views
A boxer punches a 50 Kg bag. Just as his fist hits the bag, it travels at a speed of 7 m/s. As a result of hitting the bag, his
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2. 1,311 views
A man (weighing 915 N) stands on a long railroad flatcar (weighing 2720 N) as it rolls at 18.5 m/s in the positive direction of
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2. 495 views
what is the farmula of electric field due to postive charge
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2. 331 views
A car brakes from 60 mph to a full stop in 4 seconds. Find the accelerayion of the car during this interval
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2. 400 views
which ons is stronger 1)A solid cylinder of 2)A hollow cylinser of iron 3) A cylinder made up of slits of iron
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Pulling up on a rope, you lift a 4.05-{\rm kg} bucket of water from a well with an acceleration of 2.20 m/s^2.What is the
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2. 351 views
if the second derivative is not uniform, then is the third derivative also not uniform? thank you!
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2. 293 views
what is the derivative of velocity squared? i know that the derivative of regular velocity is acceleration, but what about
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2. 482 views