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4 years ago

A helicopter’s speed increases from 30 m/s to 40 m/s in 5 seconds.

2 answers:

6 0

Acceleration is defined as the rate of change of velocity, which, simply put, is a mouthful to describe how fast something speeds up, slows down, or turns. The equation for acceleration is

a = Δv / Δt,

or your final velocity - your starting velocity, then divided by the amount of time. It can also be expressed as

a = (Vf - Vi) / t,

Where Vf is your final velocity, Vi is your initial velocity, and t is the time traveled.

The question gives us that the helicopter moves from a starting velocity of 30 m/s to a final velocity of 40 m/s in the span of 5 seconds. This means we can fill in the variables to the equation, where

Vf = 40,
Vi = 30, and
t = 5.

Plug these known variables into the original equation, and we get

a = (Vf - Vi) / t = (40 - 30) / 5.

From here, the answer comes down to 10 / 5, or 2 m/s^2.

Hope this helps! If you have any questions, don't hesitate to ask :D

finlep [7]4 years ago

6 0

Hey Queens!..... and kings:)

the answer is 2

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If the volume is held constant, what happens to the pressure of a gas as temperature is decreased? Explain.

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Answer:Decreases

Explanation:

Given

Volume is held constant that is it is a isochoric process.

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PV=nRT

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P & T

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$\frac{P_1}{P_2}=\frac{T_1}{T_2}$

As $T_1$ is decreasing therefore Pressure must also decrease so that ratio remains constant.

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3 years ago

A driver of a car enters a new 110 km/h speed zone on the highway. The driver begins to accelerate immediately and reaches 110 k

levacccp [35]

Answer:

30Km/h

Explanation:

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3 years ago

Two identical charges q placed 2.0 mapart exert forces of magnitude 4.0 N on each other What is the value of the charge q? a) q

katen-ka-za [31]

Answer:

c) $4.2*10^{-5}C$

Explanation:

Coulomb's law says that the force exerted between two charges is inversely proportional to the square of distance between them, and is given by the expression:

$F=\frac{kq_{1}q_{2}}{r^{2}}$

where k is a proportionality constant with the value $k=9*10^{9}\frac{Nm^{2}}{C^{2}}$

In this case $q_{1}=q_{2}=q$ , so we have:

$F=\frac{kq^{2}}{r^{2}}$

Solving the equation for q, we have:

$kq^{2}=Fr^{2}$

$q^{2}=\frac{Fr^{2}}{k}$

$q=\sqrt{\frac{Fr^{2}}{k}}$

Replacing the given values:

$q=\sqrt{\frac{4.0N*(2.0m)^{2}}{9*10^{-9}\frac{Nm^{2}}{C^{2}}}}$

$q=4.2*10^{-5}C$

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3 years ago

A transport plane travelling at a steady speed of 132 ms and an altitude of 113 m, releases a parcel when it is directly above a

Crank

Answer:

what time you thinking. about coming down to take a break and ok I will get to?. that was a right answer?

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3 years ago

Problem:

Mars2501 [29]

I do have a couple ideas and tips that may help you win. I don’t know how the guidelines are set up so if the ideas won’t be helpful I apologize.

First off put some ice cubes in the container then sprinkle salt on them, The reaction will create an effect and be super cold.

Another idea would be to get some dry ice if you able to, This will freeze it solid within seconds.

The last idea combines the the first. Take a bowl and fill it with with water and ice (Make sure the bowl is insulated) add a small handful of salt into the bowl, Put your drink into the cooler and before shutting stir then well then close and wait for the amount of time left, Your should have a cold water bottle.

I hoped this helped you out and I hope you also win the contest.

8 0

3 years ago