a bullet is fired upwards with the initial velocity of 250m/s. determine the time taken to reach the maximum height

Answers

Answer 1

Answer: the final velocity is 0 and the acceleration is gravity. Vf=Vi+at because gravity opposes the motion it will be -g
0=250-gt
gt=250 ....g=10
t=25sec

Answer 2

Answer: using:

v = u - gt.

Where v = final velocity in m/s, u = initial velocity in m/s, g = acceleration due to gravity in m/s², t = time in s.

At maximum height the final velocity v = 0 m/s. u = 250 m/s

v = u - gt.

0 = u - gt.

gt = u

t = u / g g ≈ 9.8 m/s²

t ≈ 250 / 9.8

t ≈ 25.51

Time to reach maximum height is ≈ 25.51 seconds.

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Answers

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Answers

Answer:

Sunspot cycle

Explanation:

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You have a cylindrical balloonship with the mass of 25 000kg, how should I calculate the airfriction on it's speed?

Answers

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Juana performs the calculation below. 6.05 + 3.156 + 5.0 How should she report the answer using the correct number of significant figures?

Answers

Juana performs the calculation of6.05 + 3.156 + 5.0. The answer is 14.206. Juana should report the answer as 14by using the correct number of significant figures. In adding numbers withsignificant figures, Juana should note that the number of significant figuresthat she can report should be the minimum.

Answer:

THE ANSWER IS C 14.2

Explanation:

I just took the test

NEED ASAP PLEASE !! Billy drops a water balloon from the roof of his house. Since the balloon began with an original velocity of zero, how far above ground was the balloon dropped if it took 2.5 seconds to hit the ground?

A. 30.6 m
B. 122.5 m
C. 12.3 m
D. 49.0 m

Answers

Answer: The correct answer is option (A).

Explanation:

Initial velocity of the balloon = 0 m/s

let the distance covered by the balloon from roof to the ground= h

Time taken by the balloon to reach the ground = t = 2.5 seconds

Acceleration due to gravity = g =9.8 $m/s^2$

Using confuse equation of the motion:

$h=ut+(1)/(2)gt^2$

$h=0 m/s* 2.5 s+(1)/(2)*9.8 m/s^2* (2.5 s)^2=30.625 m\approx 30.6 m$

Hence, the correct answer is option (A).

The balloon was 30.65 meters above ground.

ANSWER: A

The process shown in this diagram contributed great amounts of heat to the young planet Earth and is best known as radioactive A) decay.
B) fission.
C) fusion.
D) isotope.

Answers

The process shown in this diagram contributed great amounts of heat to the young planet Earth and is best known as radioactive decay. Decay is known to release large amounts of heat.

Hey there

I believe the correct answer is (A)

(A) = Decay

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