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3 years ago

What is used to create the sequential order of elements?

Physics

2 answers:

algol [13]3 years ago

5 0

Atomic Number
or
Number of Protons

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Mashutka [201]3 years ago

5 0

Answer: The elements on the periodic table are arranged in sequential order by their atomic numbers.

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A car moves round a circular track of radius 0.3m of two revolution per/sec find its angular velocity.

Pie

Answer:

the angular velocity of the car is 12.568 rad/s.

Explanation:

Given;

radius of the circular track, r = 0.3 m

number of revolutions per second made by the car, ω = 2 rev/s

The angular velocity of the car in radian per second is calculated as;

From the given data, we convert the angular velocity in revolution per second to radian per second.

$\omega = 2 \ \frac{rev}{s} \times \frac{2\pi \ rad}{1 \ rev} = 4\pi \ rad/s = 12.568 \ rad/s$

Therefore, the angular velocity of the car is 12.568 rad/s.

4 0

3 years ago

The electromagnetic waves that have the lowest frequencies are called

o-na [289]

A. Radio waves
Have the lowest frequencies

4 0

3 years ago

The wavelength of light that has a frequency of 1.20 × 1013 s-1 is ________ m.

klio [65]

The relationship between frequency and wavelength for an electromagnetic wave is
$c=f \lambda$
where
f is the frequency
$\lambda$ is the wavelength
$c=3 \cdot 10^8 m/s$ is the speed of light.

For the light in our problem, the frequency is $f=1.20 \cdot 10^{13} s^{-1}$ , so its wavelength is (re-arranging the previous formula)
$\lambda= \frac{c}{f}= \frac{3 \cdot 10^8 m/s}{1.20 \cdot 10^{13} s^{-1}}= 2.5 \cdot 10^{-5}m$

8 0

3 years ago

A bowling ball has a mass of 50 kg and is traveling with a velocity of 18 m/s 4 points

IRISSAK [1]

momentum= mass × velocity

p= 50×18

momentum= 900 kg m/s

4 0

3 years ago

You are walking down a straight path in a park and notice there is another person walking some distance ahead of you. The distan

Setler79 [48]

Answer:

25.52 m

Explanation:

Relative speed between the person and I would be the difference of our speeds

$v_r=2.85-1.09=1.76\ m/s$

Time taken by me to walk up to the person = 14.5 s

Distance is given by

$Distance=Speed\times Time\\\Rightarrow s=vt\\\Rightarrow s=1.76\times 14.5\\\Rightarrow s=25.52\ m$

The person was 25.52 m ahead of me when I started running

5 0

3 years ago