Is selective coordination required?

Is selective coordination required? Selective coordination is required for systems related to life safety (as defined in the NEC), and is achieved when an overcurrent on a circuit is interrupted and only the closest upstream device opens such that only the section of the electrical system with a problem is taken offline. What is selective […]

Will a Jump Starter start a dead battery?

Will a Jump Starter start a dead battery? A car jump starter with 500 cold-cranking amps should be able to start just about any vehicle with a dead battery. What happens if you try to jump a car wrong? When the jumper cables are incorrectly connected, the polarity of the electrical system on the vehicle […]

What is the charge of so4?

What is the charge of so4? -2 What is the charge of cro4? What is the formal charge of S in SO4? +2 Why does sulfate have 4 Oxygens? Sulfate is a polyatomic ion with 1 sulfur (6 valence electrons), 4 oxygens (4 x 6 valence electrons = 24 e-) and a charge of -2 […]

How many people die on roller coasters annually?

How many people die on roller coasters annually? four deaths Are roller coasters bad for you? Findings from a 2009 study suggest that head motions during roller coaster rides typically confer a very low risk for traumatic brain injury (TBI), and a 2017 study found that brain strain rates during roller coaster rides were similar […]

What are protective strategies?

What are protective strategies? Protective behaviour strategies. Help the child identify who they can talk to if they don’t feel safe. Make sure the child knows what to do if they are in an unsafe situation. Kids should have their own safe place in the house – a place that is ‘theirs,’ where they can […]

Are multiple choice tests accurate?

Are multiple choice tests accurate? Multiple choice test questions, also known as items, can be an effective and efficient way to assess learning outcomes. Multiple choice test items are less susceptible to guessing than true/false questions, making them a more reliable means of assessment. When should I use multiple choice test? Multiple-choice items are best […]

Do divers breathe oxygen?

Do divers breathe oxygen? Contrary to popular belief, scuba divers don’t only breathe oxygen underwater. After all, we don’t breathe pure oxygen above water either. Divers go way deeper and explore much longer with mixtures such as nitrox, heliox, and hydrox as these are safer alternatives to simple compressed air. Can oxygen get you high? […]

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