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3 years ago

Define measurements.

Physics

1 answer:

Reptile [31]3 years ago

6 0

Answer:

act or process of measuring

Explanation:

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1 (KE, PE) An object of mass 90 lbm is projected straight upward from the surface of the earth and reaches a height of 900 ft wh

Natali5045456 [20]

Answer:

Initial kinetic energy will be 2608200 lbf-ft

Initial speed will be 240.7488 m/sec

Explanation:

We have given height h = 900 ft

Mass of the object m = 90 lbm

Acceleration due to gravity $g=32.2ft/sec^2$

Initial kinetic energy will be equal to potential energy of the object

So kinetic energy = potential energy = mgh $=90\times 32.2\times 900=2608200\ lbf-ft$

This energy is also equal to the initial kinetic energy

So $\frac{1}{2}mv^2=2608200$

$v=240.7488m/sec$

So initial velocity will be 240.7488 m/sec

7 0

4 years ago

The city council is discussing whether or not to put fluoride in the city's water supply. Many other towns add it already, but y

earnstyle [38]

Answer:

For anyone who needs this answer in the future the answer is "The government agency responsible for monitoring water safety"

Explanation:

I took the quiz and got it right! It is that answer because the people who's profession is monitoring water safety would be the most reliable to ask this question. Hope this helps.

8 0

4 years ago

Yellow light travels through a certain glass block at a speed of 1.97 × 108 m/s. The wavelength of the light in this particular

Andre45 [30]

The frequency of the yellow light is $5.17\cdot 10^{14}Hz$

Explanation:

The relationship between wavelength, frequency and speed of a wave is given by the wave equation:

$v = f \lambda$

where

v is the speed of the wave

f is the frequency

$\lambda$ is the wavelength

For the yellow light in this problem, we have:

$v=1.97\cdot 10^8 m/s$ is the speed

$\lambda=3.81\cdot 10^{-7} m$ is the wavelength

Solving for f, we find its frequency:

$f=\frac{v}{\lambda}=\frac{1.97\cdot 10^8}{3.81\cdot 10^{-7}}=5.17\cdot 10^{14}Hz$

Learn more about frequency and waves:

brainly.com/question/5354733

brainly.com/question/9077368

#LearnwithBrainly

8 0

3 years ago

HELP ME!!! I don't know if you can see the picture on the right or not..

gizmo_the_mogwai [7]

It’s an assortment of compound molecules

7 0

3 years ago

Read 2 more answers

William finds a piece of pure iron in his garden. After a few days, the iron begins to rust. What are the two types of substance

nordsb [41]

Answer: an element; a compound
A compound is a molecule with at least two kinds of atoms. Since iron is only containing Fe then it shouldn't be a compound.
After iron got rust reaction, it will have oxygen make it become iron oxide. The iron oxide having Fe and O so it is a compound.

8 0

3 years ago

Define measurements.​

Define measurements.