Answer:
a) battery-->electrical current-->copper wire rotor -->magnet--> mechanical energy
Explanation:
Answer:
Explanation:
By conservation of energy, speed of the ball going up = speed of ball coming down with the ball stops at the top.
Because the gravity acceleration is constant, by symmetry, half of total time, 6/2 = 3s, is for going up and the last 3s for coming down.
Consider the last 3s when the ball drops from top to bottom, the initial velocity = 0 and acceleration = 10m/s^2
distance traveled = initial velocity * time + 1/2 * acceleration * time^2
= 0*3 + 1/2*10*3^2
= 5*9
= 45m
So maximum height of the ball is 45m.
The maximum possible value for d is <u>33.4 m</u>.
The bear chases the tourist with a speed v₁ and the tourist runs with a speed v₂. The distance between the tourist and the car is d and the distance between the tourist and the bear is 22 m. for the tourist to reach the car safely, he should cover the distance d in the same time as the bear, which covers a distance d+22 m.
Therefore,
Substitute 3.8m/s for v₂ and 6.3 m/s for v₁. Solve for d.
The maximum distance between the tourist and his car, for him to be safe from the chasing bear is <u>33.4 m.</u>
Answer:the reason is that the heating or cooling capacity of water is much less as compared to land
Explanation:
Coastal area are riverine areas, areas close to rivers,seas or ocean.
Non coastal area are areas not close to the river,they are far from the water body
Coastal area have less variation in temperature because the heating or cooling capacity of water is much less as compared to land