Answer:
A student is conducting a pendulum experiment. Which of the following pieces of safety equipment would be the most vital to conduct this test?
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Given that,
Mass = 2 kg
Height = 10 m
Speed = 1 m/s
We need to calculate the initial energy
Using formula of potential energy
We need to calculate the final energy
Using formula of kinetic energy
Put the value into the formula
We need to calculate the velocity when it is traveling 3 meters
Using conservation of energy
Put the value into the formula
Hence, The initial and final energy are 196 J and 1 J.
The speed of the particle is 7.76 m/s.
Answer:
Inside the strong metal box, there is a microwave generator called a magnetron. When you start cooking, the magnetron takes electricity from the power outlet and converts it into high-powered, 12cm (4.7 inch) radio waves. Thus the microwaves pass their energy onto the molecules in the food, rapidly heating it up.May 3, 2018
Use the conservation of the momentum to answer this question:
The resulting speed of the two bodies will be 2.2 m/s in the (original) direction of the overweight guy (110kg). Their brains not happy about the collision either.
A mirror reflects light when the atoms in a mirror catch the light and throw it back. the image what we see in a mirror is not what it's there but our brain tells us to think so. a book has trillions of irregularities present in them. for our image to be seen, it should be a polished surface, a mirror is a highly polished surface but a book is not polished. it also depends upon the material being used.