How cold can a Stirling engine get? If you design the machine correctly, the cold end will get extremely cold. In fact, Stirling coolers have been made that will cool below 10 degrees Kelvin. Micro Stirling coolers have been produced in large numbers for cooling infrared chips down to 80 degrees Kelvin for use in […]
What is another name for the vernal equinox?
What is another name for the vernal equinox? The vernal equinox (also called the spring equinox) is one of the two equinoxes—the times of the year when the amount of daylight and nighttime hours are just about of equal length. Will there be a early spring 2021? In 2021, the March equinox happens on Saturday, […]
What is the relation between CP CV and R?
What is trajectory generation?
What is trajectory generation? • Trajectory Generation: Construct a trajectory (path + time scaling) so that. the robot reaches a sequence of points in a given time. • Trajectory should be sufficiently smooth and respect limits on joint variables, velocities, accelerations, or torques. What are the disadvantages of the joint space trajectory generation? The drawback […]
How can skin drag friction be reduced?
How can skin drag friction be reduced? Friction drag can be reduced by delaying the point at which laminar flow becomes turbulent. This can be accomplished by smoothing the exposed surfaces of the aeroplane by using flush rivets on the leading edges and through painting, cleaning, waxing, polishing or the application of surface coatings. Why […]
What inventions are needed today?
What inventions are needed today? 19 Inventions That Will Soon Change the World A glass that turns water into wine. “Smart” glasses. A toothbrush that cleans your teeth by itself. A pendant that turns speech into text. A mat with a built-in alarm clock. A pancake printer. A water-filtering straw. Packaging that changes color if […]
Why would air pressure be greater at sea level than it would be on the top of a mountain?
What is the relationship between light and photography?
What is the relationship between light and photography? The relationship between the light, the subject and the viewer is at the heart of Lighting. The photographic subject can transmit, absorb or reflect photons (light particles). What is light and why it is important to photography? Lighting is a key factor in creating a successful image. […]
Which circuit is better series or parallel?
Which circuit is better series or parallel? Two bulbs in a simple parallel circuit each enjoy the full voltage of the battery. This is why the bulbs in the parallel circuit will be brighter than those in the series circuit. Another advantage to the parallel circuit is that if one loop is disconnected, then the […]
What are the 10 principles of community policing?
What are the 10 principles of community policing? Philosophy and organisational strategy. Commitment to community empowerment. Decentralised and personalised policing. Immediate and long-term proactive problem solving. Ethics, legality, responsibility and trust. Expanding the police mandate. Helping those with special needs. Grass-roots creativity and support. Does community based policing work? There is research to demonstrate that […]