Answer:
1) ELECTRO MAGNET
2) B
3) -AMOUNT OF ELECTRICITY OF THE POWER SOURCE
- AMOUNT OF COIL WRAPPED UP TO THE NAIK
-CONDUCTIVITY OF THE MEDIUM
Answer:
Explanation:
To solve this problem we need to apply the concept related to Angular Acceleration. We can find it through the equation
Where for definition,
The number of revolution 
was given by 20 times, then
We know as well that the salad rotates 6 more times, therefore in angle measurements that is
The cook at the end stop to spin, then using our first equation,
re-arrange to solve
,
We can know find the required time,
Re-arrange to find t, and considering that 
Therefore take for the salad spinner to come to rest is 3 seconds with acceleration of
Answer:
Yes, the race car driver needs a faster reaction time than someone driving in a school zone.
Explanation.
For the sake of argument, let us consider
(i) a person driving at 35 mph in a school zone (as a normal driver);
(ii) a person driving at 60 mph in a school zone (as a racing driver).
Suppose a blind pedestrian crosses the road 0.1 miles (about 500 feet) in front of the driver.
The time before the normal driver hits the pedestrian is
(0.1 /35)*3600 = 10.3 seconds.
The time before the racing driver hits the pedestrian is
(0.1/60)*3600 = 6 seconds.
Because a reaction time of 6 seconds may be insufficient to avoid hitting the pedestrian, the racing driver needs a faster reaction time than the normal driver.
2,900 N is the answer if you need an explanation tell me and i will comment the explanation
