phys. science

33,775 results

Phys Science

ok i posted it twice and no one has yet to help me about my physics

phys science

How much would your weight decrease if you went into space 3x the earths radius?

phys science

How much would your weight decrease if you went into space 3x the earths radius?

PHYS-041-Keiler: Physical Science

A prehistoric bone is found at an excavation site. If the bone originally contained 22 kg of carbon−14, how much would remain after 11,400 years?

Physical Science Question 2

What is the electromagnetic spectrum? Give examples of each kind of wave and relate each example to its relative position in the spectrum. I will be happy to critique your thinking on this. The following 2 sites will answer all your questions. http://www.geo.mtu.edu/rs/back/...

science

on light, heat and sound Waht are primary coulars of light What is spectram what are the colours What determins a colour Name one good conductor of heat and one good insulatore??? thanks if you help me send answer soon thanks a million http://csep10.phys.utk.edu/astr162/lect/...

SCIENCE HELP!!??

HI I Like you to help me with my research on Attraction and repulsion of electrical charges If you would give me any links or websites and thank you alot thanx Check these sites. http://psych.hanover.edu/Krantz/neural/charge1anim.html http://www.glenbrook.k12.il.us/gbssci/phys...

phys. science

when most matter is heated it expands right? & doesnt water expand when it is heated? & what is the diff. b/w thermal conductor and thermal insulator? & in which direction will heat spontaneously flow?

astronomy

Earths temperature averaged over the year is about 300 Kelvin. At what wavelength does it radiate most strongly? What part of the electromagnetic spectrum does this wavelength lie in? Can you see it? http://csep10.phys.utk.edu/astr162/lect/light/planck.html

Physical Science

From a general relativistic point of view, a person on the ground floor of a skyscraper ages...faster or slower than a person on the top floor? With the faster movement of the rotation of the earth at the higher altitude, the person on the ground floor would age faster than ...

phys science

A space shuttle orbits at an altitude of approximately 200km above the surface of the Earth. If the radius of the Earth itself is 6380 km, what’s the acceleration due to gravity at the altitude of the space shuttle?

physical science

Light is incident on aplane mirror at an angle of 46 degrees relative to its surface. What is the angle of reflection? Your exact answer here: http://en.wikipedia.org/wiki/Reflection_%28physics%29 The angle of incidence equals the angle of reflection but these are relative to ...

Physics

How do you calculate. How many years would it take the planet to orbit the sun. All I have is, that the planet is 97 times farther from sun than earth or 97 Astronomical units Use Kepler's Third Law. If you have never heard of it, read http://csep10.phys.utk.edu/astr161/lect/...

Phys Science

Good afternoon tutors..I need help on a few problems.Im really stuck.. 1) the space shuttle orbits at an altitude of approximately 200km above the surface of the earth. If the radius of the earth itself is 6380km, whats the acceleration de to gravity at the altitude of the ...

Phys Ed

What are 2 professional lacrosse leagues?

science

I am in middle school and we are doing a catapult projectile lab. The question is, using knowledge of force, motion and projectiles, can a catapult be built to accurately project a marshmellow toward a designated target. We have to change the angle of release and measure ...

Anatomy and Phys

what is the difference between heartburn and dyspepsia?

phys

1) Pf(x)= f(-x), p operator Find the eigenvalues and eigenfunction of p 2)Show [f(xop), d/dx] = - df/dx

phys

How many kcal of heat are required to vaporize 25.0 kg of water at 100C?

phys

show [f(xop), d/dx] = -df/dx please help, can sb gives a hint? I really appreciate.

Phys

What is the speed of a wave whose frequency is 9.00Hz and wavelength is 0.654 m?

Phys

How many hp or horsepower does it take to lift a 100kg up 30.0m in 20sec?(1hp = 748W)

Phys

A soda can (r=3cm) rolling at 2 m/s to the right is stopped in 1 m. What is its angular acceleration? (a is constant)

phys

If your metabolic consumption of oxygen is 1500ml/min, what is the P02 of venous blood?

PHYS

What is the frequency of a sound wave whose vibrations occur 5 x 10^-3 sec apart?

all

anyone have some good tips on how to study for bio phys and chem

phys

or..can someone tell me what will happen when a bar magnet is placed in a current carrying coil?

PHYS 101

Determine the volume of 200g of carbon tetrachloride,for wich specific gravity is 1.6

Phys

A Brass rod 50.0 cm long expands 0.0734 cm when heated. Find the temperature change.

Phys

on a cool night with no wind people facing a campfire feel a breeze on their backs. why?

physical education

i would like some work outs so i can raise my phys ed makes, any suggestions?

phys

a plane travels at 400 mi/r to a city away. Determine the time it takes for the round trip

10grd. Chem/Phys

numbers 1 4 6 8 9 10 12 14 15 16 27 34 49 56 57 58 70 all have or lack a certain property. any ideas i'm lost???

Phys

A certain ac signal at 60 Hz is applied across a 40-mH inductor and a 200-Ù resistor. What is the power factor of this circuit?

phys

A reversible engine with an efficiency of 32.0% has TC = 304.0 K. (a) What is TH? (b) How much heat is exhausted for every 0.138 kJ of work done?

phys

An automobile tire is rated to last for 35,000 miles. To an order of magnitude, through how many revolutions will it turn?

Science

There is no change of angle (bending) of the light rays. Each wavelength is slowed the same amount in the glass and is increased the same amount as it leaves the glass. http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/opt/mch/refr/more.rxml http://csep10.phys.utk.edu/astr162/lect/...

science

The atmosphere is composed of a mixture of _______________, _____________ ____________, and tiny___________________. Thank you for using the Jiskha Homework Help Forum. The origin of our atmosphere is still open to a great deal of speculation. One theory is that the first ...

anat. & phys.

draw & label all tissue/organs of endocrine sys. during stres response

phys 111

i travel 1 km east, than 1 km north, then climb 400m straight up a cliff. what is my distance from my starting point? a= 3i+2j+4k b= i-3j-4k

Phys

Some propane occupies 150 cm^3 at 12.4°C. Find the temperature when its volume is 132ft^3 if the pressure remains constant.

phys

If you drop a cricket ball from a very high tower, what is the final velocity after 3.5 seconds? The answer will be in m s-1

phys

Calculate the total force of the atmosphere acting on the top of a table that measures 1.9m×2.1m really have a clue how to start this

phys

n object is placed 40 cm from a lens of focal length -10 cm. The image is virtual or real? inverted or upright? diminshed or enlarged?

Phys. Sci.

Which metal will only be found in nature combined with other elements? 1. gold 2. silver 3. platinum 4. lithium Thanks, Morgan

phys

What is the minimum lens size (in meters) that will permit just resolving 2 stars 1.1 second apart using light of 510nm?

Phys

A top starting from rest is spun for 3 seconds achieving an angular speed of 20 rad/s. How many radians has it gone through in this time? (a is constant)

phys

What is the total translational kinetic energy of the gas molecules of 0.470 mol of air at atmospheric pressure that occupies a volume of 1.00 L (0.00100 m3)?

PHYS

You throw a bowling ball o the empire state building(381m high) 10m/s down- ward. How long does it take to get to the bottom?

phys ed

im in swim and my teacher thinks i have a bad stroke how do i get a strong stroke

phys

A rectangular plate has a length of (20.0 ± 0.2) cm and a width of (8.3 ± 0.1) cm. Calculate the area of the plate, including its uncertainty.

phys.

a computer with a power input of 230.0 W (watts) has a resistance of 91.0 Ohms . how do you find the current in the computer?

phys

A wheel starts from rest and has an angular acceleration of 4.0 rad/s^(2). When it has made 10 rev its angular velocity is:

physics

i don't understand the projectile motion...my teacher said...it's a motion of a body confined to a vertical plane, perpendicular to Earth's surface... I don't get it, can anyone explain to me clearly???? plzzzzz....THX!!!! If your teacher said that, she was wrong. I doubt if ...

univ-phys

Two objects attract each other gravitationally with a force of 2.5×10^-10N when they are 0.22m apart. Their total mass is 4.50kg. Find their individual masses.

Science

how do kenetic and potential energy effect a basic pendulum? How does gravity effect it? Since this is not my area of expertise, I searched Google under the key words "pendulum kinetic potential energy gravity" to get these possible sources: http://galileo.phys.virginia.edu/...

Phys

The total impedance of an RC circuit with a resistance of 200 Ù is 1060 Ù. If the frequency of the applied voltage is 20.0 Hz, what is the value of the capacitance in this circuit?

PHYS

The fundamental resonance on a string is 60 cm length fixed at both ends is 440Hz. What is the speed of a wave traveling on this string?

phys chem

how much energy (kj/mol) is required to break the hydrogen bond in water (Er=80.0) (Er= Relative permitivity) I'm really not sure how to approach this, and if i need enthalpies of vaporization or not...

Phys

A 120-V rms voltage at 2000 Hz is applied to a 6.0-mH inductor, a 2.0-ìF capacitor and a 200-Ù resistor. What is the rms value of the current in this circuit?

phys

A 0.600-kg aluminum teakettle contains 4.00 kg of water at 26.0° C. How much heat is required to raise the temperature of the water (and kettle) to 100.0° C?

PHYS

The spring constant for a vertical spring stretch 15cm when 22.0kg mass is attached to it is about: a. 1440 N/m b. 1210 N/m c. 990 N/m d. 17.1 N/m e. 2.54 N/m

physics

The range of human hearing is roughly from twenty hertz to twenty kilohertz. Based on these limits and a value of 350 m/s for the speed of sound, what are the lengths of the longest and shortest pipes (open at both ends and producing sound at their fundamental frequencies) ...

Phys

The masses and coordinates of three spheres are as follows: 18 kg, x = 1.50 m, y = 1.50 m; 40 kg, x = -1.50 m, y = -1.50 m; 64 kg, x = 0.00 m, y= -0.25 m. What is the magnitude of the gravitational force on a 14 kg sphere located at the origin due to the other spheres?

phys

A 30.0-g lead bullet leaves a rifle at a temperature of 89.0° C and hits a steel plate. If the bullet melts, what is the minimum speed it must have?

phys

A 1000-kg airplane moves in straight flight at constant speed. The force of air friction is 1800 N. The net force on the plane is

phys

A 1000-kg airplane moves in straight flight at constant speed. The force of air friction is 1800 N. The net force on the plane is

Phys. Ed

W.Shott OF CLEVELAND pitched a nine inning game without allowing a hit, or a walk, or a man to reach first, and his team made no errors. Yet he lost 1-0 How?

phys

While spinning in a centrifuge, a 70.0 kg astronaut experiences an acceleration of 5.00 g, or five times the acceleration due to gravity on the earth. What is the centripetal force acting on her?

Phys

Three capacitors, each of capacitance 120 pF, are each charged to 500 V and then connected in series. Determine (a) the potential difference between the end plates, (b) the charge on each capacitor, and (c) the energy stored in the system.

anatomy and phys

ATP provides an essential energy source in the CNS for A) division of neurons B) maintenance of ionic gradients via ATPase C) generation of action potentials D) ESPSs and IPSPs

Phys Sci

A sound is traveling through air with a temperature of 35 0C. The sound wave has a wavelength of 0.75 meters. What is the frequency of the sound? How do I calculate this problem?

phys

Find every angle θ between 0 and 360° for which the ratio of sin θ to cos θ is -3.00. (Round your answer to the nearest degree.)

phys.

the shortest and longest wavelength series in singly ionized helium is 22.8nm and 30.4nm . Are they right? How many orders we can see between the angles range observations 30 and 90 in the Balmer's series?

Phys sci

we are makeing rube goldberg machiens but are problem is hot to activate the pulley by putting the string in to the fire befor its time and makeing the machine do other things.

PHYS

AN OBJECT OF HEIGHT 5CM IS PLACED INFRONT OF ACONCAVE MIRROR OF FOCAL LENGTH 6CM AT ADISTANCE 13CM .FIND IMAGE POSITION MAGNIFICATION IMAGE PROPERTIES

phys

The heat capacity of object B is twice that of object A. Initially A is at 300 K and B is at 450 K. They are placed in thermal contact and the combination is isolated. The final temperature of both objects is: ans is 400 K how?

phys-frequency

If one doubles the tension in a violin string, the fundamental frequency of that string will increase by a factor of: 2 4 1.4 1.7 ?_?

phys

An object with an initial velocity of 12 m/s west experiences a constant acceleration of 4 m/s^2 west for 3 seconds. During this time the object travels a distance of:

phys!!! how do you do this

Just after opening a parachute of negligible mass, a parachutist of mass 85.5 kg experiences an instantaneous upward acceleration of 1.12 m/s2. Find the force of the air on the parachute.

Phys

Centripetal force: a race car driver wants to stay as straight as possible around the curves in the race. What should happen to his radius, force and velocity?

Maths

Hello how do we get the resultant force of a vector id the the forces were in different directions ? and how do we use the parellogram thingi do we just add the forces? please can some1 explain me this in their own words thanks alot Since this is not my area of expertise, I ...

phys/ 210

I need help in answering this question personality theories disussed in text i am using learning theory and trait theory comparing and contrasting these two theories

Phys Please Help!!

Just after opening a parachute of negligible mass, a parachutist of mass 85.5 kg experiences an instantaneous upward acceleration of 1.12 m/s2. Find the force of the air on the parachute.

Phys

A car of mass 1200kg is moving on a road at the speed of 60km/hr.if coefficient of friction is 38, and Normal force is 50N. The frictional force acting on the car is given by

phys

A disk with a rotational inertia of 2.0 kg.m^2 and a radius of 0.40 m rotates on a frictionless fixed axis perpendicular to the disk faces and through its center. A force of 5.0 N is applied tangentially to the rim. The angular acceleration of the disk is:

phys

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+ 3.0jhat)m/s^2. Assume t is in seconds. Determine the position of the particle as a function of time t. Express your answer in terms of the unit vectors ihat ...

Phys..magnets

can someone please explain this aim: To investigate how the force acting on a bar magnet placed in a current carrying coil is related to the coil??? what is the force called?

Phys

A stationary 50 kg circular object (r0=.25m) is on a 30 degree incline. The coefficient of rolling friction between the block and the incline is 0.05. If it moves for 3 seconds, what is the angular displacement of the object at this time?

phys

A toy airplane of mass 0.159 kg is tied to the ceiling with a string. The airplane moves in a horizontal circle of radius 2.97 m, with a constant speed of 1.51 m/s. What is the angle the string makeswith the vertical?

Phys sci

Which one of the following frequency can set the string into resonant vibration? If a guitar string has a fundamental frequency of 500Hz a)250Hz b)750Hz c)1500Hz d)1750Hz

phys

To totally convert a given amount of mechanical energy into heat is Choose one answer. a. impossible. b. possible. c. impossible to answer without additional information.

PHYS HELP

Water flows over a section of Niagara Falls at a rate of 1.43 × 10^6 kg/s and falls 62.5 m. The acceleration of gravity is 9.8 m/s^2. How much power is generated by the falling water? Answer in units of MW.

Phys Sci

a marble is launched off of a 1.3m high horizontal table with a velocity of 7.2m/sec how far away from the table will the marble land? how long does it takes to hit the floor?

Science-Enr. Phys.

A box of books weighing 325 N moves at a constant velocity across the floor when the box is pushed with a force of 425 N exerted downward at an angle of 35.2 degrees below the horizontal. Fink Mu,k between the box and the floor. There have been several of this type of question...

phys

Four point masses are at the corners of a square whose side is 20 cm long (see Fig 3). What is the magnitude of the net gravitational force on a point mass m5 = 2.5 kg located at the center of the square?

phys

male erection is an example of __________. no thought or emotion is required for it to occur, but conscious control can influence it. a. peripheral nerves b. sensory nerves c. a spinal reflex d. a sexual reflex

PHYS 400

An athlete on a trampoline leaps straight up into the air with an initial speed of 6.36 m/s. Find the maximum height reached by the athlete (in meters) relative to the trampoline. Use g=9.8 ms-2 and answer to 3 SF.

phys

Doug pushes a 4.65 kg crate up a 2.00 m high 13.0° frictionless slope by pushing it with a constant horizontal force of 35.8 N. What is the speed (in m/s) of the crate as it reaches the top of the slope assuming that the local acceleration due to gravity is -9.80 m/s2?

phys

A 5g bullet is fired from a 5000g gun. If the bullet leaves the gun going +800m/s, with what speed does the gun recoil?

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