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stealth61 [152]

2 years ago

14

Atoms of an element can have more than 1 mass number but only one atomic number, Why?

1 answer:

Tanzania [10]2 years ago

6 0

Answer:

An element's mass number (A) is the sum of the number of protons and the number of neutrons. ... Protons and neutrons both weigh about one atomic mass unit or amu. Isotopes of the same element will have the same atomic number but different mass numbers.

Explanation:

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closed and unsecure circuit

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Some chlorine atoms have an atomic mass of 37, while others have an

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When Jim and Rob ride bicycles, Jim can only accelerate at three-quarters the acceleration of Rob. Both startfrom rest at the bo

Natali5045456 [20]

Answer:

46.4 s

Explanation:

5 minutes = 60 * 5 = 300 seconds

Let g = 9.8 m/s2. And $\theta$ be the slope of the road, s be the distance of the road, a be the acceleration generated by Rob, 3a/4 is the acceleration generated by Jim . Both of their motions are subjected to parallel component of the gravitational acceleration $gsin\theta$

Rob equation of motion can be modeled as s = a_Rt_R^2/2 = a300^2/2 = 45000a[/tex]

Jim equation of motion is $s = a_Jt_J^2/2 = (3a/4)t_J^2/2 = 3at_J^2/8$

As both of them cover the same distance

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So Jim should start 346.4 – 300 = 46.4 seconds earlier than Rob in other to reach the end at the same time

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3 years ago

A water heater that has the shape of a right cylindrical tank with a radius of 1 foot and a height of 4 feet is being drained. h

Natali5045456 [20]

<span> </span>For any prism-shaped geometry, the volume (V) is assumed by the product of cross-sectional area (A) and height (h).

<span> V = Ah </span>

<span>
Distinguishing with respect to time gives the relationship between the rates.
dV/dt = A*dh/dt</span>

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<span>
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3 years ago

A car advertisement states that a certain car can accelerate from rest to

kaheart [24]

Answer:

a = 2.22 [m/s^2]

Explanation:

First we have to convert from kilometers per hour to meters per second

$40 [\frac{km}{h}]*[\frac{1h}{3600s}]*[\frac{1000m}{1km}] = 11.11 [m/s]$

We have to use the following kinematics equation:

$v_{f}= v_{i}+(a*t)$

where:

Vf = final velocity = 11.11 [m/s]

Vi = initial velocity = 0

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The initial speed is taken as zero, as the car starts from zero.

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2 years ago

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