Answer:
5.88×10⁸ W
Explanation:
Power = change in energy / time
P = mgh / t
P = (m/t) gh
P = (1.2×10⁶ kg/s) (9.8 m/s²) (50.0 m)
P = 5.88×10⁸ W
Answer: Money is indivisible and Credit cards are used primarily to withdraw money from a checking account are two false statements.
Explanation:
Since we know the characteristics of money as follows:
1) Money is divisible.
2) Money has different forms - coins, notes, demand deposits, cheques, tokens, funds in checkable deposits etc.
3) Money is a unit of account.
4) Money is measure of value.
5) Money is store of value.
So, Money is indivisible is false.
And credit cards are used primarily to withdraw money from a checking account is false , as debit cards are used for withdrawing money.
Hence, Money is indivisible and Credit cards are used primarily to withdraw money from a checking account are two false statements.
Answer:
Explanation:
\frac{\lambda }{2} is the minimum interplanar spacing which is required for Bragg's diffraction to occur.
The train accelerates at the rate of 20 for some time, until it's just exactly
time to put on the brakes, decelerate at the rate of 100, and come to a
screeching stop after a total distance of exactly 2.7 km.
The speed it reaches while accelerating is exactly the speed it starts decelerating from.
Speed reached while accelerating = (acceleration-1) (Time-1) = .2 time-1
Speed started from to slow down = (acceleration-2) (Time-2) = 1 time-2
The speeds are equal.
.2 time-1 = 1 time-2
time-1 = 5 x time-2
It spends 5 times as long speeding up as it spends slowing down.
The distance it covers speeding up = 1/2 A (5T)-squared
= 0.1 x 25 T-squared = 2.5 T-squared.
The distance it covers slowing down = 1/2 A (T-squared)
= 0.5 T-squared.
Total distance = 2,700 meters.
(2.5 + .5) T-squared = 2,700
T-squared = 2700/3 = 900
T = 30 seconds
The train speeds up for 150 seconds, reaching a speed of 30 meters per sec
and covering 2,250 meters.
It then slows down for 30 seconds, covering 450 meters.
Total time = <u>180 sec</u> = 3 minutes, minimum.
Observation:
This solution is worth more than 5 points.