(b) Solar cells can be used to generate electricity. B(i) How is energy transferred from the Sun to a solar cell?(1)□ A by heating B by radiation□ C electrically□ D mechanically 相关知识点: 试题来源: 解析 BB (by radiation);A is incorrect because transfers by heatitng cannot take...
It is believed that these rotational forces in the liquid iron layer lead to weak magnetic forces around the axis of spin. It turns out that because the Earth's magnetic field is so weak, a compass is nothing but a detector for very slight magnetic fields created by anything. That is why...
When a catenary mooring is mechanically tensioned, the aim is to reduce the mooring footprint (affected seabed area), and the length of cable or chain used, and to increase the restrictions on the movement of the floating platform. TLPs (Tensioned Legs Platforms). TLP anchorages are tendons...
initiates this chemical reaction byignitingthe charge. As the fuel undergoes oxidation, a great deal of energy is released. The force of this explosion, concentrated above the cylinder head, drives the piston down. The motion created by the movement of the piston is eventually transferred to the...
Sea-level rise wasn’t the only problem, however. So much fresh water was transferred to the ocean that it changed the saltiness of the sea. This is a crucial effect, because the oceans store and transfer heat around the planet through a process linked to its salinity. In the North Atlan...
Short-circuiting the tissues (TEP = 0) reverses the direction of net Na flux from absorption to secretion, and this secretory flux is mediated by the Na/K pump …. This implies that any molecules passively transferred with fluid flow through the ‘paracellular route’ mostly pass through the...
Third, the claw appendage is mechanically triggered by the branch itself, and has to enable perching at up to 4 m/s. The mechanical appendage of the robot needs to be able to resist the impact, close quickly onto the branch, apply sufficient force to remain in place, and lastly tolerat...
The spring force in the reeds is often not sufficient to mechanically break the weld after the drive current has been turned off which renders the relay unusable. Electromechanical relays may also be damaged from arcing but the energy required to cause this is much higher. Because reed relays ...
The viscous coupling is often found in all-wheel-drive vehicles. It is commonly used to link the back wheels to the front wheels so that when one set of wheels starts to slip, torque will be transferred to the other set. Mechanically, it works similarly to thetorque converterthat transfers...
Solar energy is heat and light from the sun. It’s a clean, renewable energy source that can be converted into electricity using various technologies, with solar electric panels being among the most prevalent. By reducing dependence on grid electricity, rooftop solar energy can stabilize, and eve...