In the kitchen. micro-wave ovens: they use the heating properties of radiofrequencies: water molecules in the food are reheated by absorbing the energy generated by very powerful radiation in a confined space. induction hobs: they function using medium frequency magnetic fields that produce the heat needed for cooking.
Here the maximum angular displacement of the sign board is given 25 degree
mass of the sign is 2.40 kg and its vertical side is 55 cm
Now the moment of inertia of the board about the hinge point is given as
now by energy conservation
so angular speed just before the impact is 2.24 rad/s
Part b)
now a mass of 450 g travels in opposite direction and hit at the lower end
so here we will use angular momentum conservation
Part c)
Again we can use energy conservation
Answer:
Correct answer: P = 38,793.1 W = 38.7 kW
Explanation:
Power is calculated according to the following formula:
P = A / t
where A is the work performed and t the elapsed time
work is a measure of changing energy
A = ΔEp = m · g · h we will take that g = 10 m/s
A = 4,500 · 10 · 25 = 1,125,000 J
P = 1,125,000 / 29 = 38,793.1 W = 38.7 kW
P = 38,793.1 W = 38.7 kW
God is with you!!!
Answer:
3: I can´t see the text/image, but it depend on the mass and the force applied to the ball, if both are too high, it will be harder to make a home run. (Second law)
4:It would be easier to make a home run because there is no interruption between the ball and the space the same travels. (Third law)
Explanation: