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cestrela7 [59]
3 years ago
9

What is the acceleration of an object that begins at 2 meters per second and after 5 minutes is travelling at 1 meter per second

?
Physics
1 answer:
iren [92.7K]3 years ago
4 0

Answer:

a=-0.003m/s^{2}

Explanation:

a=\frac{vf-vi}{t}

a=\frac{1m/s-2m/s}{300s}    (convert 5 mins to seconds --> 300s)

a=-0.003m/s^{2}

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You are asked to determine the density of a liquid. What lab equipment is most helpful to find density of the liquid?
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D. The graduated cylinder is used to find the volume, and triple beam balance is used to find the mass.
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The atomic mass of an element is defined as the weighted average mass of that element’s
marishachu [46]

Answer:

False

Explanation:

Atomic mass (Also called Atomic Weight, although this denomination is incorrect, since the mass is property of the body and the weight depends on the gravity) Mass of an atom corresponding to a certain chemical element). The uma (u) is usually used as a unit of measure. Where u.m.a are acronyms that mean "unit of atomic mass". This unit is also usually called Dalton (Da) in honor of the English chemist John Dalton.

It is equivalent to one twelfth of the mass of the nucleus of the most abundant isotope of carbon, carbon-12. It corresponds roughly to the mass of a proton (or a hydrogen atom). It is abbreviated as "uma", although it can also be found by its English acronym "amu" (Atomic Mass Unit). However, the recommended symbol is simply "u".

<u> The atomic masses of the chemical elements are usually calculated with the weighted average of the masses of the different isotopes of each element taking into account the relative abundance of each of them</u>, which explains the non-correspondence between the atomic mass in umas, of an element, and the number of nucleons that harbors the nucleus of its most common isotope.

4 0
3 years ago
A body having uniform velocity has zero acceleration? give reason​
Sonja [21]

Answer:

A body having uniform velocity has zero acceleration because

there is not change in velocity.

5 0
3 years ago
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What is another name for the introitus? psych 230?
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An orbiting satellite can become charged by the photoelectric effect when sunlight ejects electrons from its outer surface. Sate
Rufina [12.5K]

Answer:

the longest wavelength of incident sunlight that can eject an electron from the platinum is 233 nm

Explanation:

Given data

Φ = 5.32 eV

to find out

the longest wavelength

solution

we know that

hf = k(maximum) +Ф   ...............1

here we consider k(maximum ) will be zero because photon wavelength max when low photon energy

so hf = 0

and hc/ λ = +Ф

so λ = hc/Ф  ................2

now put value hc = 1240 ev nm and Φ = 5.32 eV

so hc = 1240 / 5.32

hc = 233 nm

the longest wavelength of incident sunlight that can eject an electron from the platinum is 233 nm

8 0
3 years ago
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