Category: Physics

What is the mass of an object that requires a force of 30 N to accelerate at a rate of 5 m sec2? 6 kg What is the mass of an object that needs a force of 4 500 N to accelerate it at a rate of 5m sec 2? Answer. so, 900 is the […]

How does a motor create rotation? A coil of wire carrying a current in a magnetic field experiences a force that tends to make it rotate. This effect can be used to make an electric motor. When a motor is short circuited what causes the motor to still rotate? A magnetic field with the poles […]

How do you prove momentum is conserved? The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision. What […]

What is the most common genetically modified food? Corn is the most commonly grown crop in the United States, and most of it is GMO. Most GMO corn is created to resist insect pests or tolerate herbicides. Bacillus thuringiensis (Bt) corn is a GMO corn that produces proteins that are toxic to certain insect pests […]

Why does land heat faster than water? Heat capacity. Simple physics suggests that when you put more heat into the climate system, land should warm more quickly than oceans. This is because land has a smaller “heat capacity” than water, which means it needs less heat to raise its temperature. Can you tell why there […]

Do ice trays wear out? “You probably just need to replace the trays,” says gilintx. “When ice trays develop pocks from regular wear, the ice starts to form in the rough little fissures as well. When you go to crack the ice out of the tray, it shatters rather than popping out. How often should […]

How many vowel sounds are there? 14 vowel sounds How many vowel sounds are there Orton Gillingham? five vowels How long is an Orton-Gillingham lesson? 40 minute to one hour What consonants should be taught first? It is also a good idea to begin instruction in sound-letter relationships by choosing consonants such as f, m, […]

What happens to a neutral atom if it gains 2 electrons? Answer. When atom A gains two electrons it forms an anion by developing 2 negative charges over it as there are 2 electrons more than the number of protons in the ion. What happens when hydrogen loses an proton? A hydrogen ion is created […]

What does this result indicate about resistors connected in series? What does this result indicate about resistors connected in series? They have the same current flowing through them. The current in resistor two is greater than the current in resistor three. This is because current gets smaller as resistance increases in series. When a pair […]

How do you thank an audience? Thank You For Your Attention It’s audiences like you that make presentations awesome. Thank you very much for your unwavering attention throughout this presentation. I remain most grateful for the rapt attention with which you sat through this lecture. Attention spans of such length are rare in our field. […]