The answer's 25,000 joules
half m v squared
half 2000, x 5 squared
<span>In the transformer we use from faraday's law.in this low when a variable current pass from a loop of wire, make variable flux and when variable flux in a loop make variable current in loop.be careful that current or flux must to be variable.
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A) Measure the pH of different household chemicals
Explanation:
To demonstrate a chemical property using an experiment, measuring the pH of different household chemicals will be the best way. The pH is the degree of hydrogen or hydroxyl ion concentration in a solution.
- Chemical properties tell us about what a substance can do.
- It shows if a substance will react with other substances or not.
- Examples are flammability, rusting of iron, precipitation, decomposition of water by electric current e.t.c.
- Measuring the pH is a chemical property determination procedure.
- The pH points to the degree of acidity or alkalinity of a solution.
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Work= F times d so force x distance
25(.5) is 12.5
Explanation:
From the curve given in the attachment,
a) minimum speed v0 required if the car is to travel beyond the top of the hill
climb to the top = 5.4 m
Therefore, 
= 10.29 m/s
b) No, we cannot affect this speed by changing the depth of the valley to make the coaster pick up more speed at the bottom as this speed does not depend upon depth of the valley.
