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sweet-ann [11.9K]
3 years ago
10

Which fact was most likely discovered between the time of Mendeleev’s table and the time of Moseley’s table that helped Moseley

develop his version?
Physics
1 answer:
igomit [66]3 years ago
7 0

Answer:

The number of protons in an atom is different than the atom's total mass.

Explanation:

Mendeleev had presented the first structured periodic table in 1869. But, in 1913, Henry Moseley developed the modern periodic table. The crucial difference between the two periodic tables is that Mendeleev's periodic table is generated on the basis of the atomic masses of chemical elements while the chemical element's atomic numbers were the main focus of Moseley's periodic table. There were just 56 chemical elements in Mendeleev's periodic table. On the other hand, 74 chemical elements are presented in Moseley's periodic table.

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"An alpha particle (He2+) with a velocity of 2.6x106m/scrosses a uniform magnetic field at an angle of 37.0°to the field lines a
sergey [27]

Answer:

B = 5.59x10⁹ T

Explanation:

The magnetic force (F), on a the alpha particle with charge (q) that is moving at velocity (v) as the cross product of the velocity and magnetic field (B) is:

F = qvBsin(\theta)

<u>We have:</u>

F = 1.4x10⁻³ N

v = 2.6x10⁶ m/s

θ = 37.0°

q = 2*p = 2*1.6x10⁻¹⁹ C

Hence, the strength of the magnetic field is:

B = \frac{F}{qvsin(\theta)} = \frac{1.4 \cdot 10^{-3}}{1.6 \cdot 10^{-19} C*2.6 \cdot 10^{6}*sin(37)} = 5.59 \cdot 10^{9} T

Therefore, the strength of the magnetic field is 5.59x10⁹ T.

I hope it helps you!

7 0
3 years ago
Is Obesity primarily due to Genetics?
zepelin [54]
Obesity is primarily caused by a lack of physical activity or by unhealthy dietary habits. The positive energy balance underlying obesity is generally attributed to chronic excess energy intake or reduced physical activity.
6 0
3 years ago
Which of the following is a scalar quantity?
raketka [301]

A scalar quantity is one in which there is no direction given.


30 Lbs would be the answer, since there is no indicator of direction.

5 0
3 years ago
VU
aliya0001 [1]

Answer:

1350 meters

Explanation:

45x30=1350

7 0
3 years ago
Read 2 more answers
A rope pulls on a metal box at an angle of 60.0° with a force of 255 N. The box moves horizontally for 15.0 m. How much work was
Iteru [2.4K]
The work done by the rope on the box is equal to:
W=Fd \cos \theta
where F is the force applied by the rope, d the  distance covered by the box and \theta is the angle between the direction of the force and of the displacement.

Using the data of the problem: F=255 N, d=15.0 m and \theta = 60^{\circ}, we find the work:
W=(255 N)(15.0 m)(\cos 60^{\circ})=1912.5 J
4 0
3 years ago
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