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4 years ago

What is the relationship between the atoms of elements,its isotopes and its ions

1 answer:

6 0

An element refers to a collection of atoms having the same number of protons and electrons (an atomic number). In each element there is a different atomic number due to a different amount of protons in the nucleus.

An isotope is a variation of an element that contains a different number of neutrons, therefore adding weight to the atom.

An ion is a charged atom, and its charge shows how many electrons it needs to gain or lose in order to become stable.

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A force of 38.7 N is applied to the master cylinder of a hydraulic brake system. The cylinder has an area of 7.61 cm^2. The forc

devlian [24]

Answer

Total force exerted by brake cylinders is 249.69 N

Explanation:

We have given that force $F_1=38.7N$

And area of the cylinders $A_1=7.61cm^2=7.61\times 10^{-4}m^2$

We have to find the total force

We have given total surface area $A_2=49.1cm^2=49.1\times 10^{4}m^2$

From pascal's law we know that $P_1=P_2$

And we know that $P=\frac{F}{A}$

So $\frac{F_1}{A_1}=\frac{F_2}{A_2}$

$\frac{38.7}{7.61\times 10^{-4}}=\frac{F_2}{49.1\times 10^{-4}}$

$F_2=249.69N$

5 0

3 years ago

Dr. gavin decides that instead of conducting a 2 ´ 4 independent-groups factorial design, he is going to conduct a 2 ´ 4 within-

vampirchik [111]

<span>If Dr. Gavin decides that instead of conducting a 2 ´ 4 independent-groups factorial design, and he is going to conduct a 2 ´ 4 within-subjects factorial design, then the things that will change are the various independent groups which are involved.</span>

8 0

3 years ago

A flat plate maintained at a temperature of 80°C experiences a flow of atmospheric air at 0°C. If the temperature gradient at th

dimulka [17.4K]

Answer:

h =12.9 w/m2 k

Explanation:

we know that thermal conductivity of air K at 0 degree celcius = 0.024 w/mk

T_S = 80 Degree celcius

temperature gradient = -43 degree C/mm = - 43*1000 / m $\frac{dT}{dx} = - 43*1000 / m$

by fourier law

$Q = -k_{air} A * \frac{dT}{dx}$

$\frac{Q}{A} = -0.024 *1*(-43000)$

q = 1032 watt/m2

we know that from newton's law

q = h (T_s - T_∞)

1032 = h*(80 - 0)

h =12.9 w/m2 k

4 0

3 years ago

How to determine my slope in physics graph

Hatshy [7]

Answer:

Determine the coordinates of two points on the line. Calculate the difference between these two locations' y-coordinates (rise). Calculate the x-coordinate difference between these two places (run). Divide the y-coordinate difference by the x-coordinate difference (rise/run or slope).

5 0

2 years ago

Calculate the amount of gravitational potential energy at the top of each hill

Marizza181 [45]

The gravitational potential energy has the formula:
PE = mgh
where PE is in joules
m is the mass of the object in kg
g is the acceleration due to gravity
h is the height in m

since you did not give the value of h, i cannot fully answer your quesstion.
PE = (58/1000 kg) (9.81m/s2) h
PE = 0.57h
just substitute the value of h in the equation

5 0

4 years ago