What is Rise: Definition and 274 Discussions

Boston Dynamics is an American engineering and robotics design company founded in 1992 as a spin-off from the Massachusetts Institute of Technology. Headquartered in Waltham, Massachusetts, Boston Dynamics is owned by the Hyundai Motor Group since December 2020.
Boston Dynamics is best known for the development of a series of dynamic highly-mobile robots, including BigDog, Spot, Atlas, and Handle. Since 2019, Spot has been made commercially available, making it the first commercially available robot from Boston Dynamics, with the company stating its intent to commercialize other robots as well, including Handle.

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  1. B

    Where does the sun rise, w/ axial tilt?

    Obviously we all know the sun generally rises in the east and sets in the west. But due to axial tilt, it is only really due east and due west at the equinoxes. At other times of the year, the sunrise will be somewhat north of east or south of east (and likewise for the sunset, but let's focus...
  2. T

    Any plausable scientific explaination for the temperature rise in western U.S.?

    I was wondering if there is any solid scientific explanation for the very recent temperature rise in the western-coast of the United States. I live in Arizona, and it's been over 75 degrees for the past week or so. Is this a complete meteorological anomaly? Or does science have some sort of...
  3. Andre

    Sea Level Rise: New Measurements from GRACE Satellites

    There is a new paper about it, the results of the measurements of the GRACE satellites on the sea level changes. http://sciences.blogs.liberation.fr/home/files/Cazenave_et_al_GPC_2008.pdf Good news.
  4. N

    Exploring the Relationship Between Spin and Magnetism in Subatomic Particles

    Dunno whether this is the right place for this question! but As it is related to subatomic particles, I think it is! We know that magnetism arises due to rotation of an electron around its own axis in metals, but after all what happens due the moving electric current? Will the same...
  5. H

    Can Sound Rise Like Heat? Searching for Answers...

    i have been searching for something i am positively sure about but I've been told that i am wrong, i couldn't find anything on the internet...so i thought this to be the best way to find some answers to my question... is it true that sound ...also rises up like heat...? pleas answer...
  6. P

    Calculating temp rise in copper wire

    I'm not sure if this question belongs in the forum or the physics forum, I guess I'll post it there as well. I'm trying to calculate the temperature rise in a coil of wire (27AWG) wound around a toroid. The current through the wire is ~0.5A with a calculated voltage drop of 14.64mV across the...
  7. A

    Styrofoam object- rise or sink?

    i have a 30 ft pipe - 10" diameter. there is a constant water flow at the top, keeping the water level constant ( the pipe is always full to the top). at the bottom the water just flows out of the basin and away. the pipe is is just 1" underwater in the pool underneath. the yellow object is a...
  8. M

    Fermi level rise up with raisng up the temperature

    Hi, Im just wondering, why the fermi level rise up with raisng up the temperature when donors are present in Extrinsic semiconductor? thanx
  9. D

    How to Create Linear Rise and Fall Edges in a Circuit

    I need help with a circuit. I need to run the signal in first image through a circuit that can clean up the exponential rise and fall edges and make it more linear. Can anyone help. http://picasaweb.google.com/davidanthonypitts/SignalWaveforms?authkey=5iLxB--Xdqs#
  10. A

    Styrofoam object- rise or sink?

    i have a 30 ft pipe - 10" diameter. there is a constant water flow at the top, keeping the water level constant ( the pipe is always full to the top). at the bottom the water just flows out of the basin and away. the pipe is is just 1" underwater in the pool underneath. the yellow object is a...
  11. X

    Field strength giving rise to a polarization charge of -s.cos(theta) on a cavity

    Hello, I'm learning EM from Bleaney & Bleaney and got stuck on Ex2.1 (can do Ex2.2-2.7, though...) - If the polarization charge on the surface of a spherical cavity is -s.cos(theta), prove that the field strength at the centre is s/3e0. If I expand V(r) within the cavity as A.r.cos(theta) +...
  12. A

    What gives rise to natural frequency?

    What gives rise to natural frequency? Resonance is when an oscillating force has a frequency that matches the natural frequency of a system... but what gives rise to the natural frequency of the system?
  13. Wellesley

    News Oil Prices in 2009: Will They Rise or Fall?

    Will oil prices rise in 2009? Or will the economy keep the prices down for a while?
  14. B

    Calculating Watts to Air Temperature Rise in a Given Area

    Hi All, Could someone please help me with the calculations & an example of Watts consumed to Air Temperature rise in a given area: Eg: If we have a closed sealed container with no outside influences of area say 1 cubic meter, well insulated with an electrical heat source of the best...
  15. R

    How Does a Climbing Man Affect the Center of Mass in a Pulley System?

    Homework Statement A pulley fixed to a rigid support carries a rope whose one end is tied to a ladder and a man and the other end to the counterweight of mass M. The man of mass m climbs up a distance of h with respect to the ladder and then stops. If the mass of the rope and the friction in...
  16. Y

    Calculating Temperature Rise of Air in Bicycle Pump

    Homework Statement A bicycle pump is a cylinder 20cm long and 3.0cm in diameter. The pump contains air at 21.0C and 1.0atm. If the outlet at the base of the pump is blocked and the handle is pushed in very quickly, compressing the air to half its original volume, how hot does the air in...
  17. O

    The rise and fall of evidence-based natural philosophy.

    The rise and fall of evidence-based natural philosophy. The way we think of the external physical world — natural philosophy -- has in the past often been coloured by anthro’centric prejudice and personal egotism. This perspective has gradually been eclipsed by the secular ideal of...
  18. Ivan Seeking

    Crude Prices Skyrocket: $11 Rise in One Day

    It is the largest single day rise ever recorded for crude prices; I think they said it is an $11 dollar rise in one day. Some analysts are predicting that we hit $150 by July.
  19. L

    The probability of a rise or fall in blood pressure?

    The probability of a rise or fall in blood pressure?? I have developed a database program that searches for all blood pressure readings that are similar to the readings of any given patient. The program then retrieves the following day’s data from all the matching patients to find out what (if...
  20. E

    Calculating Block Rise & Rocket Course Change: Help Needed!

    Please help me . (1)- A gun is fired vertically into a 1.4 kg block of wood at rest directly above it. If the bullet has a mass of 21 g and a speed of 310 m/s, how high will the block rise into the air after the bullet becomes imbeded in it ? (2)- A rocket of total mass 3700 kg is...
  21. wolram

    Is Crime Really on the Rise?

    Another statistic i wonder is true. http://www.ncpa.org/pi/crime/pd081299h.html
  22. rohanprabhu

    Why does smoke always rise upwards?

    First i thought that smoke used to rise upwards due to a 'projection' created by a chimney.. but lately when I was looking at an essence stick.. the smoke could literally go anywhere. Even the same with a burning piece of coal. Even the smoke generated at the bottom part of the coal 'envelopes'...
  23. Ivan Seeking

    News Exports on the rise: It's a load of garbage

    But here's the catch http://www.pbs.org/newshour/bb/business/jan-june08/dollarsworth_03-04.html streaming video optional So, where will the long-term balance of trade leave the US standard of living?
  24. J

    Supply & Demand Impact of SW US/Mexican Freeze: Prices Rise for Imported Produce

    A freeze in southwestern U.S. and Mexican fields has resulted in damaged crops and inflated prices for imported produce such as lettuce, broccoli and cauliflower. Describe how this would be interpreted on a supply and demand diagram. Do not draw graph. *Please include one(if you can) so I...
  25. G

    Atom can give rise to singlet, doublet, triplet, and quartet states?

    How do you know if an atom can give rise to singlet, doublet, triplet, and quartet states? I'm having a hard time understanding this
  26. Z

    Calculated sea surface rise from total Greenland melt

    What might be the calculated sea surface rise from a total Greenland melt? http://en.wikipedia.org/wiki/Sea_level_rise" Volume of ice in km^3 /surface area ocean km^2 = rise in km. S.A. of Earth is 510 x 10^6 km^2. ocean is 71% of S.A., or 361 x 10^6 km^2. http://en.wikipedia.org/wiki/Earth"...
  27. T

    Avg. temperature rise & energy conversion

    The problem is: The sun is 1.5x10^11 meters from the earth. Energy from the sun is received at the Earth's surface at the rate of 1.4 kilowatts per square meter. I'm trying to find two answers: 1. This energy flux from the Sun falls on a pond of water 100 square meters in area and 0.1 meter in...
  28. Ivan Seeking

    News Natural disasters on the rise: What do we do?

    http://www.physorg.com/news115220493.html In this context, I think it is important to avoid debate about causes [AGW], and focus on the best means to avoid disasters and respond to the emergencies. San Diego did a fabulous job of managing the fires this year, but many homes were lost. Much...
  29. J

    Minimum escape velocity of a projectile required to rise a certain height

    Homework Statement A projectile is launched from the surface of a planet (mass = M, radius = R). What minimum launch speed is required if the projectile is to rise to a height of 2R above the surface of the planet? Disregard any dissipative effects of the atmosphere. Homework Equations...
  30. rocomath

    Calculating Water Level Rise in Trapezoid Trough

    Homework Statement A water trough is 10m long and a cross-section has a shape of an isosceles trapezoid that is 30cm wide at the bottom, 80cm wide at the top, and has a height of 50cm. If the bottom of the trough is being filled with water at the rate of .2m^3/min, how fast is the water level...
  31. A

    Will there be a capillary rise of liquid in vaccume with gravitation present?

    if gravitation is present, will there be a capillary rise of liquid in vaccume?
  32. M

    Calculating Water Level Rise in a Triangular Prism

    Homework Statement A triangular prism has end peices in the shape of inverted isosceles traingles with bases 60cm and heights 40 cm . It is 4m long and water is being pumped into it at a rate of 9 L/s. How fast is the level of water rising when the water is 10cm deep. Homework Equations...
  33. Ivan Seeking

    Noctilucent clouds on the rise

    http://www.denverpost.com/ci_5579483
  34. K

    WHY is the sun red during rise and set

    during the sunrise and sunset, we find the sun reddish in color...why is it so...my view is that as the distance to Earth during these times is longer than mid-day, and applying doppler effect, as the sun nears the apparent wavelength decreases and so is the perceived color...is this approach...
  35. N

    Hot Air: Does It Rise or Is It Heat Transfer?

    everybody knows that hot air rises. but on thinking about heat as the knetic energy of molecules, heat transfer just becomes another word for collisions between molecules (looking at a gas) right? so surely hot air, in it's attempt to rise from the bottom to the top of a container, would...
  36. G

    Pressure Increase + Boiling: Does Temperature Rise?

    Here's the question: If the pressure of a substance is increased during a boiling process, will the temperature also increase or will it remain constant? It seems like it would increase because boiling is basically the release of pressure to create equilibrium. Is this right? Thanks a lot.
  37. C

    Cold Weather Convection: Does Warm Water Rise or Fall?

    Does warm water rise or fall in cold weather? I think it falls Does it have to do with convection??
  38. L

    Solving a Venturi Device for Height of Mercury Rise

    A Venturi device has a diameter of 4mm at one end and a diameter of 2cm at the other. Air enters at 1200cm^3/m. Mercury is in the botom of the device. Assuming mercury's density to be 13700kg/m^3, and air's density to be 1.2kg/m^3, find how high the mercury rises. Assume air to be an ideal...
  39. V

    Calculate Rise Time for Sinusoidal Signal at f_0

    Algebraically calculate the Rise Time value for the sinusoidal signal at an arbitrary frequency f_0 (expressed in Hz). Assume that the signal has zero average, that is V_{min}\,=\,-V_{max} Express the Rise Time in units of the period T\,=\,\frac{1}{f_0}. MY WORK SO FAR...
  40. marcus

    The Rise of Slime: Marine Evolution in Reverse

    http://www.latimes.com/news/local/la-me-ocean30jul30,0,7764272.story?page=1 "...In many places — the atolls of the Pacific, the shrimp beds of the Eastern Seaboard, the fiords of Norway — some of the most advanced forms of ocean life are struggling to survive while the most primitive are...
  41. B

    Heater causes room temp to rise

    Here's yet another problem causing me trouble. I just don't understand(yet again) how to begin the problem. A little nudge in the right direction would be very much appreciated! If a heater supplies 1.8 x 10^6 J/h to a room 6.5m X 4.6m X 3.0m containing air at 20 deg C and 1atm, by how much...
  42. B

    Temp rise due to hammering nails

    Here's my question... The 1.20 kg head of a hammer has a speed of 6.5m/s just before it strikes a nail and is brought to rest. Estimate the temperature rise of a 14 gram iron nail generated by ten such hammer blows done in quick succession. Assume the nail absorbs all the energy. The...
  43. marcus

    The Rise of String Theory, The Fall of a Science (Houghton Mifflin)

    scheduled for release by Houghton-Mifflin in September https://www.amazon.com/gp/product/0618551050/?tag=pfamazon01-20 The Trouble With Physics: The Rise of String Theory, The Fall of a Science, and What Comes Next I think the reference must be to the rise of an exclusive string research...
  44. E

    Calculate the heat during the canon ball rise

    HI! This problem has been killing me... The Q is the following: A canon fires a canon ball which weighs 50 grams vertically at an initial speed of 600 m/s. 3 Km on top of the point where it was fired, the speed is only 50 m/s. calculate the heat during the canon ball rise. I don't know...
  45. M

    High pressure temperature rise and smoke

    this is what I did: I attached a hose to an empty plastic bottle, sealed it with plastic paste and put a cork in it. When i turned the water on the pressure started builiding up. What I noticed was that when it reaches about 2 bar it gets a lot hotter. I don't know why, do you? When the cork...
  46. G

    Will the barometer reading rise or fall ?

    If i have a barometer which reads 76cm of hg when kept in an elevator when the elevator is at rest . now the elevator starts going up with some acceleration . will the barometer read less than , greater than or equal to 76cm of hg . also explain why . what will happen if the barometer is under...
  47. A

    Is rise over run the way you find slope?

    Is rise over run the way you find slope?
  48. S

    What force must the man pull on the rope to rise with a constant velocity

    Ok, I already posted this a few days ago but I am bringing it back because i don't quite understand a man sits in a bosuns chair that dangles from a massless rope, which runs over a massless frictionless pulley, and back down to the mans hand. The combined mass of the man and the chair is...
  49. 7

    How High Will the Block Rise After a Gunshot?

    A gun is fired vertically into a 1.4 kg block of wood at rest directly above it. If the bullet has a mass of 21g and speed of 210 m/s how high will the block rise into the air after the bullet becomes embedded in it? the total momentum in the system is 210 x .021 = 4.41, after the collision...
  50. S

    Temperature Rise of the cooling water

    Hi Guys! well! I am studying vapor powered cycles nowadays. The topic which I am studying currently is The Rankine Cycle. I came across a question in my book . which i want you to help me out. It is said that in the rankine cycle, in the condenser, 2000 kg/s of cooling water is used to...
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