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. M

    MHB Rate of Water Rise in Cone-Shaped Vessel

    a vessel in the shape of a cone is standing on its apex. water flows in at a steady rate, of 1m^3 per minute. the vessel has a height of 2m and a diameter of 2m when the vessel is 1/8 full find the rate at which water is rising v=1/3 pi r^2 h however i can't differentiate this
  2. King_Silver

    Temp. rise that will cause liquid to fill vessel completely

    I've a problem with a question regarding a closed spherical storage tank of 30m^3. Its filled to the 99% mark with Nitric acid and the tank is made of stainless steel. I'm trying to determine the temperature rise that will cause the liquid to completely fill the vessel. I know that as the...
  3. FallenApple

    How can a ball rise higher than originally dropped?

    So here is a case where a ball is thrown on the floor with no friction. Then is a case with frictionNow what I don't understand is how is the presence of friction going to make the normal force larger than usual. The friction is dependent on the normal force, not the other way around. And the...
  4. B

    Height of the rise of the object attached to the spring ?

    Homework Statement Question :- A block of mass ##5 kg## is attached to a spring. The spring is stretched by ##10 cm## under the load of the block. A impulse is provided to the block such that it moves up with a velocity of ##2 m/s##. Find the height it will rise. Homework Equations ##F_s =...
  5. Y

    How to Calculate Capillary Rise on the ISS

    Homework Statement Consider an experiment on the International Space Station, which is illustrated below. A cylindrical capillary of length L= 10. [cm] and inner diameter of dc=500. [µm] (sealed at one end), is positioned to contact a droplet of water, D = 1.0 [cm], which is floating in the ISS...
  6. S

    Calculating heated rectangle temperature rise

    Hi I have a question about temperature rise and thermal conductivity. If I have a small 1 watt heater (3 x 3 x 3mm) in the middle of a rectangular block (100x40x70mm) made of a material that has a thermal conductivity of 0.48W/mk, how do I work out the final temperature that the block settles...
  7. A

    I Why does temperature always rise in stars?

    Hello everyone, I know that pre-main sequence stars do heat up because of gravitational contraction, and the increase in internal energy (and so in temperature) comes from this shrinking and is governed by the virial theorem (...
  8. M

    Temperature rise due to cycle test

    Hello all, I am working on a few test scripts to test the life of a hydraulic cylinder. (It is a mechanically operated cylinder and has a positive displacement) The testing will involve thousands of continuous pump and retraction operations, due to which the temperature of the piston seal and...
  9. P

    Rate of Increase in Water Level Due to Falling Cone in Cylinder

    Homework Statement A cylinder of radius ##{R}## is partially filled with water. There is an inverted cone of cone angle 90° and base radius ##{\frac{R}{2}}## which is falling in it with a constant speed ##v=30~cm/s##. Find the rate of increase of water level (in ##cm/s##) when half the...
  10. M

    Head Loss and Pressure Rise During Gradual Expansion

    Homework Statement , There is an Head Loss question, two pipes join and expanding parts 30 degrees from the horizantal. Homework Equations The Attempt at a Solution Before attemting a solution I try to understand what a1=a2=1.06 is? Would you like to give some information about it...
  11. pbutter

    What gives rise to a magnetic moment in a proton/neutron?

    Homework Statement Describe, with examples, what is meant by magnetic moment. What gives rise to a magnetic moment in a proton/neutron? Homework Equations The Attempt at a Solution I know what a magnetic moment is, just struggling with the other parts of the question. So what I'm thinking is...
  12. E

    Cooking Gas Containers: Temp Impact of Motion

    Homework Statement Cooking gas containers are kept in a lorry moving with uniform speed. The temperature of the gas molecules inside the containers will increase, decrease or stay the same? Homework Equations T is proportional to KE of gas molecules. The Attempt at a Solution I thought it...
  13. V

    Other Has anyone interned with DAAD Rise in Germany?

    I was accepted to their program and could work with a group doing data analysis. However, I have already accepted another offer at my own school. If anyone has done a RISE internship, how was it? the pay? the experience? Germany? I have to accept by tomorrow and am not sure what to do.
  14. A

    Calculating temperature rise due to solar insolation

    Homework Statement (This is not a homework problem, just something I'm curious about.) Assuming ideal conditions (clear skies, a flat landscape, no wind, anything else you can think of), is it possible to calculate how much the temperature (at 2 meters above the ground, as per meteorological...
  15. A

    Calculate the rise in temp in copper 3 core wire

    Dear Guys, It will be really helpful if some one can give me the calculation step by step or some calculator where in I can resolve my long pending problem. Thanks in advance I will be really glad to have a correct answer. The Q is below Calculate temperature rise in 3 core cable after 3 hrs...
  16. SDewan

    Capillary rise in tube of insufficient length

    When there is Capillary rise in tube of insufficient length, why does not the liquid overflow?
  17. dakota224

    Problem: using thermal expansion to calculate sea level rise

    Homework Statement Since the 1980's a total of 20 x 10^22 J of additional energy has been absorbed by the worlds oceans. This is 90% of the additional heat our planet is storing as a consequence of global warming. The surface area of the worlds oceans is 361,900,000 km^2 and we will assume this...
  18. avito009

    What is Rise in laymans terms?

    As per me rise is the vertical length of the structure. Am I right? I read in Gordon's book "Structures or why things don't fall down" that the rise should be half the span of the bridge. Why? What does span mean?. As per me span means the area between one end where there is a column and the...
  19. G

    Why Are Different Distances Used in Fluid Dynamics Calculations?

    Homework Statement in the second picturre, why the zs1 and zs2 is calculated by using 2m and 0.6m respectively ? it should be 0.8m , am i right ? what's the purpose of the author to use 2m and 0.6m ? Homework EquationsThe Attempt at a Solution
  20. H

    Vertical rise of liquid at the back of a linearly accelerating tank....

    Homework Statement why the vertical rise of the surface is given by the formula as shown in the notes ? shouldn't it = Δs = (g +az ) Δx / ax ? Homework EquationsThe Attempt at a Solution
  21. vetgirl1990

    How high will a helium balloon rise?

    Homework Statement A helium balloon of mass 0.2kg and volume 1m3 is attached to a long thin rope of mass density 1g/m. The coils of rope lay flat on the ground, so that as the balloon moves up the rope unwinds without resistance. How high will the balloon rise? Air density = 1.204kg/m3 a)...
  22. S

    Capillary action at different temperatures

    Hi guys, I'm doing a project at the moment revolving around capillary action and surface tension. Today I conducted an experiment to observe capillary action in a capillary tube and paper towel at different temperatures of water. I don't understand why I've got the following results: As you...
  23. E

    Compression due to temperature rise vs volume reduction

    If I have 2 sealed tanks A and B of 1 cu ft volume that contain air at atmospheric pressure and are at 300 deg K. temp absolute. For tank A I raise the temperature from 300K to 600K and I suppose the pressure will double due to this and would be 14.7 * 2 = 29.4psi absolute For tank B I use a...
  24. M

    Can the Pressure Rise in a System be Calculated When Leakage Changes?

    Hello, I am new to this forum but I have a question for you all. It is about the pressure in a system that changes when leakage changes. The test setup has to following components: - Air supply with 8-10 bar - Pressure valve that can be manually adjusted - A flow meter that measures the...
  25. R

    What causes the liquid to rise in this picture?

    This is a diagram of a pitot-static tube. My question is however not related to its applications but rather, what causes the liquid to rise up the static tube? The static tube is at right angles to the fluid flow. I understand that this is a very basic question but I can't seem to get my head...
  26. Syed Alam

    Enthelpy rise hot channel factor and Radial form factor

    I am currently designing a whole-core for small PWR. I am calculating core life (years) vs. FdH and RFF. What is the difference between "Enthalpy rise hot channel factor (FdH)" and "Radial form factor (RFF)"? I have calculated "CHANNEL FDH" which is same as "RFF". Do I have to try "CHANNEL...
  27. P

    Power cable heat rise calculations

    We have a 90 deg C. rated PEX cable copper sized 1x185mmm2. This cable is to be used in 45 deg C environment (alone in air on a cable tray). We want to use it in intermittent operation where the cable will be loaded with 600 kW for 40 seconds, then nothing for 40 seconds. Then repeat. The...
  28. R

    What is the Rise in Temperature of Molten Metal During Cylindrical Die Forging?

    Homework Statement [/B] A molten metal is forced through a cylindrical die at a pressure of 168000 Kg per square meter. Given that the density of the molten metal is 2000 Kg per cubic meter and the specific heat of the metal is 0.03, find the rise in temperature during...
  29. AdityaDev

    Is the rise in mercury level due to a change in pressure or temperature?

    Homework Statement A tube which is open at both ends is immersed in a beaker containing mercury. The top end which comes out of the mercury level is now sealed and then the tube is raised by some height such that some part still remains inside the beaker. The mercury inside the tube rises...
  30. B

    How fast would 18.5L water temperature rise to 144 degrees?

    If u had a 18.5L water in a plastic container, in a room that was at 144 degrees. How long would it take for 18.5L water to rise to that temperature? I am trying to buy a water storage device, but it can't go over 122 degrees.
  31. G

    Time dependance of temperature rise

    I feel very dumb that I cannot figure this one out despite a PhD in fiber optics, so looking for some bigger brains to help... I'm passing an oven over an optical fiber and I'm trying to figure out what temperature the fiber will see in the center. I know the ambient temperature of the oven...
  32. S

    How do I calculate the height this water rocket will rise?

    Homework Statement A 15.0 g plastic water rocket containing 40.0 g of water and compressed air is strung on a very low friction horizontal wire. When fired, compressed air forces the water from the rocket in 0.600 s at an average exit velocity of 4.05 m/s [E]. Based on the information in the...
  33. J

    Capillary Rise in Tube: What Happens if Length is Insufficient?

    What happen when the capillary rise occur in a tube of insufficient length? My teacher told me that hR = constant where h is height and R is radius of sphere of which the curved surface of meniscus firm a part. She also told me that if h become less so R has to increase so radius of meniscus...
  34. S

    Low Water Pressure in high rise buildings

    Hello, I am learning physics on my own and came across this question about why we would have low water pressure in a high rise apartment compared to an apartment located on ground level. I googled and cannot find a direct explanation. I took some time to think about the approach and I could...
  35. B

    Why does infinite potential well give rise to standing wave?

    For a particle in a box that is described with a wave function, why can there only be a standing wave when there is an infinite potential well? From my understanding, the infinite potential well makes it impossible for the particle to tunnel through the barrier and so the wave function cannot...
  36. A

    Moon Phases: Rise & Set Timings & Direction Explained

    Hello! Why does the moon has different rise and set timing for different phases? And also, why does it rise from different directions during different phases? Help me out please!
  37. W

    How Come this does Not Give Rise to an Epidemic?

    And of course, I am glad it doesn't (hasn't yet?) . Hi All, I see daily people going through trash cans looking for recyclables. These people do not wear gloves, and their hands go through all sorts of trash, including food leftovers. I imagine at some point they may rub their faces with...
  38. Kaustubh sri

    Does the Permeability of Water Prevent Surface Disturbance in Aquariums?

    When we look in the aquerium , the fish moves from here to there but there is no disturbance at the surface of water . Why is it so? My attempt Actually I think that this problem is due to permiability of water. Am I right or wrong?
  39. A

    Pressure rise in a vaccum system gas specific?

    If I introduce a gas into closed vacuum system at a known rate let's say 10 SCCM there will be a subsequent pressure rise over time. Is that pressure rise gas species dependent. If I evacuate the system and introduce a different gas at 10 SCCM should I see the same rate of pressure rise? Im...
  40. K

    How much does the temperature of a river rise in going over 30 m?

    Homework Statement Assuming no heat is transferred to or from the surroundings, how much does the temperature of a river rise in going over a 30 m falls? (assume the velocity of the water is the same above and below the falls)Homework Equations Δl = αlΔTThe Attempt at a Solution H = 0 and l =...
  41. S

    Temperature Rise due to Increase in Pressure (Liquid)

    I need help finding the temperature rise of a liquid (specifically diesel) due to a pressure increase. The system contains a pump at 500 hp and runs at 524 gpm. The inlet temperature is 75 F and the pressure is 150 psi. The exit pressure is about 1155 psi. I have the specific gravity as 0.841...
  42. M

    How fast would a methane cloud rise in air?

    Homework Statement Hi everyone, This is a conceptual question, so there are no variables, per se. I'm trying to figure out how to calculate the velocity at which methane would rise into the atmosphere when released on the ground. Density of air: 1.225kg/m^3 Density of methane: 0.717kg/m^3...
  43. ugenetic

    Q give rise to D => E => V => I => H.

    Charge is the most fundamental quantity. consider a point charge Q to simplify our mental picture: Q will give rise to a Immutable D, whatever material that Q was placed in. E will then = D/ε. Stronger dielectric material will really weaken you E here. However this is not a contradiction...
  44. G

    Temperature Rise of Steel Ball in Water/Ice

    Homework Statement If a steel ball of mass 100 grams at a temperature of 100° is dropped into 1 litre of water at 20°C, what is the temperature rise? What would happen if it were dropped into a mixture of ice and water at 0°C? Homework Equations I assume that I'm required to use ΔQ =...
  45. D

    Rise in sea level due to increased temp. on earth

    Homework Statement See attachment Homework Equations See attachments The Attempt at a Solution I'm really struggling to understand how to solve this problem. I guess I need to know the volume and surface of the sea on earth? But I'm honesty a bit lost as we don't have a...
  46. S

    Temperature rise after collision

    Homework Statement Determine the fractional decrease in total kinetic energy of each set of asteroids when they collide. If the average specific heat of the material composing the asteroids is assumed to be that of ice (2.05 kJ/kg·˚C), by how much does the temperature of the asteroids rise...
  47. A

    Rise in room temperature over a one hour period

    I have a room with no cooling. Room info : w = 5m l = 4m h= 2.5m Heat dissipation from equipment in room= 65kw Ambient temp = 20 degrees celcius I need to know the temperature rise over a one hour period Please help Thanks
  48. C

    Oil volume required to rise the piston

    Homework Statement The piston shown weighs 11 lbf. In its initial position, the piston is restrained from moving to the bottom of the cylinder by means of the metal stop. Assuming there is neither friction nor leakage between piston and cylinder, what volume of oil (S = 0.85) would have to...
  49. 3

    Pendulum Rise from Release Point: 0.005 m

    Homework Statement You are given a pendulum composed of a 0.030 kg mass on the end of a 0.60 m long massless string. If the pendulum is moved 30° from the vertical and given an initial speed of 0.39 m/s tangent to the support string and away from the vertical, how much higher relative to the...
  50. T

    How high will the pendulum rise?

    Homework Statement You are given a pendulum composed of a 0.015 kg mass on the end of a 0.40 m long massless string. If the pendulum is moved 30° from the vertical and given an initial speed of 0.45 m/s tangent to the support string and away from the vertical, how much higher relative to the...
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