PHYSICS HIGH SCHOOL

The horizontal sweep of an oscilloscope is rated ina. volts/division
b. amps/division
c. seconds/division
d. ohms/divisionthe horizontal sweep of an oscilloscope is rated in seconds/division.

Answers

Answer 1

Answer: C is the correct answer

Answer 2

Answer:

Second division

Explanation:

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CONSIDER A TRAIN WHICH CAN ACCELERATION OF 20CM/SEC AND SLOW DOWN WITH ACCELERATION OF 100 CM/SEC FIND THE MINIMUM TIME FOR TRAIN TO TRAVEL BETWEEN THE STATIONS 2.7 KM PER A PART

Answers

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 = 180 sec = 3 minutes, minimum.

Observation:
This solution is worth more than 5 points.

This can be done by hit and trial easily.

Considering train accelerate for 13000s and deaccelerate for 1000s
so total distance covered is = 20cm/s * 13000s + 100cm/s*100s
= (260000 + 10000 )cm
= 270000cm
= 2.7km

So total time taken is - 13100 seconds

A ship needs to sail to an island that is 1,000 km south of its starting point. If the captain sails south at a steady velocity of 30 km/h for 30 hours, will the ship make it? a) Yes b) No c) Insufficient information d) Maybe

Answers

No, it will not reach its point. Here is why:

Velocity x time

30 x 30 = 900 km

900 km is not equal to 1,000 km so the ship would have to sail for another 10 hours.

Hope this helps!

-namanraje777

An arrow is fired horizontally at a target that is 40 m away (horizontal d). The arrow drops 0.5 m before striking the target. With what velocity is the arrow fired (what is the horizontal vi)?

Answers

Answer:

---

Explanation:

Which of the following is a result of reduced levels of red blood cells and elevated levels of white blood cells in the body?

Answers

The cells that circulate in the bloodstream are generally divided into three types, white blood cells.

1. An isotope has the same ________, but a different ________ .Question 1 options:

number of protons, number of electrons

number of neutrons, number of protons

Mass number, number of protons.

Atomic number and Mass number

2.U-232
U-235
U-236
U-238

These nuclei all have a different number of

Question 2 options:

Electrons

Neutrons

Protons

Nucli
Identify the number of neutrons in one atom of sulfur with an isotopic mass number of 34 amu.

Question 3 options:

16

18

32

34

3.Identify the number of neutrons in one atom of sulfur with an isotopic mass number of 34 amu.

Question 3 options:

16

18

32

34