Yes. Use "has" for singular and "have" when plural objects. Some examples: The car has 4 wheels; This book has 100 pages; Those flowers have been there for so long; These rings have a special meaning to me.|@Pinru 不客气。There is no formal/informal in this rule. More on hinative.com

If you think of electricity as being analogous to water, voltage is like water pressure, and amperage is like the rate of flow of the current. So 5V at 10A would be like a river: low pressure, but a lot of water flowing past. And 10V at 5A would be like a pressure washer: high pressure, but not a lot of water. But they both have the same wattage, which means that the analogous streams of water could both turn a water wheel at the same speed. More on reddit.com

"The hard work of our employees and the trust of our customers have enabled us to ..." In this sentence should it be "have" or "has"? . TLDR: Whether the verb should be singular or plural depends on the context and on what the speaker is attempting to communicate. Though, as a standalone example, the plural verb ("have") would usually be considered (by school textbooks and tests) to be the only correct choice. Caveat: Schools and textbooks typically teach the rule that when the subject is realized by an 'and'-coordination of noun phrases (as is done in your example), then the verb should be plural, e.g. "have" for your example. But, of course, that school grammar "rule" is a gross overgeneralization. As to the OP's example, consider: "The hard work of our employees and the trust of our customers, that/it(?!) has enabled us to ..." <-- left-dislocation "The hard work of our employees and the trust of our customers, they have enabled us to ..." <-- left-dislocation "The hard work of our employees and the trust of our customers has(?!)/have enabled us to ..." <-- OP's example Also, consider "Accuracy and precision is the core of our business" (and also "Accuracy and precision is what makes our company what it is"). In short: for examples like the OP's, the plural verb would be much more frequent, and it is the plural verb that would be expected as correct for tests and school. But for some specific contexts, the speaker might prefer to intentionally use the singular verb for the meaning that they are trying to communicate (notional agreement). More on reddit.com

Forget Instagram and Facebook they are algorithm based. Designed to keep people scrolling and watching ads. It's a dopamine thing. People might see your photo for a split second as they scroll by looking for the next dancing cat video. Also, some guys opinion of your work on Facebook or here even doesn't mean they're right about it. It's quite possible that you're a better photographer than them. 😁😉 How many of the people commenting negatively on your work have been in the exact same situation taking an image like that. I'm betting hardly any or very few. How can someone who has no experience of doing what you did give you advice on what you did wrong or should do.🤔 Stick with Flickr or 500px. Plenty of back patting goes on there.👍 Why not try printing some and asking local coffee shops and bars if they will display them. I guarantee you that your photos will get properly viewed by far more people. You might even sell one or two as long as you price them around $50 and below or whatever is the equivalent in your country. Join your local photography club. You'll find it far better than Facebook groups.👍 More on reddit.com