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3 years ago

Can 2 atoms have different numbers of neutrons and the same number of protons and be from different elements?

1 answer:

7 0

Two atoms with the same atomic number, but different mass numbers (same number of protons, different number of neutrons), are called isotopes, or isotopic nuclides. Having different numbers of neutrons changes the mass of these atoms, so isotopes have slight variations in their physical and chemical behavior.

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A 25 kg child is riding on a swing. If the child travels 8.9 m/s at the bottom of their swing, how high into the air is the chil

Setler [38]

Answer:

h = 4.04 m

Explanation:

Given that,

Mass of a child, m = 25 kg

The speed of the child at the bottom of the swing is 8.9 m/s

We need to find the height in the air is the child is able to swing. Let the height is h. Using the conservation of energy such that,

$mgh=\dfrac{1}{2}mv^2\\\\h=\dfrac{v^2}{2g}$

Put all the values,

$h=\dfrac{(8.9)^2}{2\times 9.8}\\\\h=4.04\ m$

So, the child is able to go at a height of 4.04 m.

7 0

3 years ago

12) Photosynthesis is a chemical reaction where carbon dioxide and water react to form glucose (C6H12O6) and oxygen gas. Which r

marusya05 [52]

6CO2 + 6H2O → C6H12O6 + 6O2

4 0

4 years ago

Read 2 more answers

3. What is the frequency of a wave that has a wave speed of 20 m/s and a wavelength of 0.50 m?

bonufazy [111]

Explanation:

everything can be found in the picture

3 0

3 years ago

State the name of electromagnetic wave other than visible light ?

Natali5045456 [20]

Answer:

-Radio waves

-Microwaves

-Infrared light (IR)

-Visible light

-Ultraviolet (UV)

-X-ray

-Gamma rays

(this is in order from the longest wavelength to shortest wavelength)

7 0

3 years ago

a 0.311 kg tennis racket moving 30.3 m/s east makes an elastic collision with a 0.0570 kg ball moving 19.2 m/s west. find the ve

Colt1911 [192]

Answer:

15.0 m/s

Explanation:

When elastic collision occurs, the final velocities, v of the bodies are obtained by

$v_1=\frac {(m_1-m_2)u_1}{m_1+m_2}+ \frac {2m_2u_2}{m_1+m_2}$

$v_2=\frac {(m_2-m_1)u_2}{m_1+m_2}+ \frac {2m_2u_1}{m_1+m_2}$

Where u and m denote initial velocities and mass while the subscripts 1 and 2 are for tennis ball and the other ball

Substituting 0.311 for mass of tennis, 0.0570 for mass of the other ball, 30.3 m/s for velocity of tennis ball and -19.2 m/s

$v_1=\frac {(0.311-0.0570)\times 30.3}{0.311+0.0570}+ \frac {2\times 0.0570\times -19.2}{0.311+0.0570}= 20.91359+ -5.94783= 14.96576 m/s\approx 15.0 m/s$

3 0

3 years ago