A. A balance. B. A ruler. C. A spring scale. D. A stopwatch. 相关知识点: 试题来源: 解析 C。解析:文中明确提到“We placed the block on the flat surface and applied a force to it using a spring scale.”。 反馈 收藏
Yougaingreaterconfidenceinyourself.Also,youbecomemoreoptimisticandcalmerinthemindthanbefore.Thereareseveralreasonsforthesechanges:yourself-imageimprovesasyoustartlivingintidybeautifulrooms,andyougaindecision-makingskillsasyoucontinuetochoosebetweenwhichthingstothroworgiveawayandwhichtokeep.ThewayweletgoofthingsintheKo...
That means that the more force you apply to an object, the greater the acceleration. And, the more mass the object has, the lower the acceleration. Newton's Second Law can be written in equation form: F = ma. For falling objects we can write F=mg where g is the acceleration due...
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How do you measure load? Load can be measured in weight units like pounds or newtons. 10 Can load exist without a force? No, load is a result of gravitational force. 9 Can force be felt? Yes, force can be felt as a push, pull, or through acceleration. 9 Is wind considered a forc...
Piezoelectric sensors (or Piezo sensors) apply different mechanics to measure force. The unit has two crystal disks with an electrode foil mounted in between them. When force is applied, the friction between the disks and electrode results in an electrical charge that can be measured. ...
20180607 20170916 20140111 Nowadays many young people in work force change their jobs or careers every few years. What do you think are the reasons for this? Do the advantages outweigh disadvantages? 20140405 20180630 20140621 An increasing number of people are changing their careers. What are the...
This measure is for protecting the grid and local substations from instantaneous surges in demand, such as at the beginning of the default schedule when everyone’s chargepoint activates and their EVs start charging. Similarly, it prevents unexpected surges like after a power outage or loss of int...
While force may act externally, strength is a measure of internal capability. For instance, in the realm of materials, the strength of a metal signifies how much force it can endure before deforming. 10 Distinguishing between "force" and "strength" can sometimes be subtle, especially when ...
What Do Jobless Claims Mean? Jobless claims are a measure of how many people are out of work at a certain time. There are two sections of jobless claims reported—initial and continuing jobless claims. Initial jobless claims are for new claimants for unemployment benefits while continuing jobless...