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3 years ago

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Which statement about atomic structure is incorrect? A) Protons are located in the nucleus. B) Protons and electrons have the sa

me mass. C) Protons and electrons have opposite charges. D) Neutral atoms contain the same number of protons and electrons.

1 answer:

d1i1m1o1n [39]3 years ago

8 0

Answer:

b is the answer

Explain:

i took it trust

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1. A wave has a wavelength of 5 m and a frequency of 2 Hz. At what speed/velocity does the

yuradex [85]

Answer:

1.10m/s

2.0.1m

3.5Hz

Explanation:

v=velocity, f=frequency and T=wavelength

1.v=ft

v=2x5

=10m

2.v=ft

100=1000T

divide both sides by 1000

T=0.1m

3.v=fT

25=5f

divide both sides by 5

f=5Hz

4 0

3 years ago

g a mass of 1.3 kg is pushed horizontally against a massless spring with a spring constant of 58 n/m until the spring compresses

ExtremeBDS [4]

Answer: $1.102\ J$

Explanation:

Given

Mass $m=1.3\ kg$

Spring constant $k=58\ N/m$

Compression in the spring $x=19.5\ cm\ or\ 0.195\ m$

When the mass leaves the spring, the elastic potential energy of spring is being converted into kinetic energy of mass i.e.

$\Rightarrow \dfrac{1}{2}kx^2=\dfrac{1}{2}mv^2\\\\\Rightarrow \dfrac{1}{2}\cdot 58\cdot (0.195)^2=\dfrac{1}{2}mv^2\\\\\Rightarrow \dfrac{1}{2}mv^2=1.102\ J$

The kinetic energy of the mass is 1.102 J.

5 0

3 years ago

A cruise ship has a mass of 100,000,000 kg and a kinetic energy of 5,000,000 kJ. Calculate the speed of the cruise ship.

KiRa [710]

Explanation:

K.E = 5,000,000 KJ

MASS = 100,000,000 Kg

K.E = 1/2 MV^2

$5000000 = \frac{1}{2} \times 100000000 \times v {}^{2}$

$5000000 = 50000000 \times v {}^{2}$

$v {}^{2} = \frac{5000000}{50000000}$

$v {}^{2} = \frac{5}{50}$

therefore

$v {}^{2} = \frac{1}{10}$

$v = \sqrt{0.1}$

v = 0.316 m/s^2

4 0

3 years ago

What are the differences between oceanic and continental crust

Lostsunrise [7]

Explanation:

Both oceanic crust and continental crust are less dense than the mantle, but oceanic crust is denser than continental crust. ... Because continental crust is less dense than oceanic crust it floats higher on the mantle, just like a piece of Styrofoam floats higher on water than a piece of wood does.

The continental crust is by far the older of the two types of crust.

Hope this helps you out ; )

6 0

3 years ago

Which best illustrates the gravitational force in action?

Hitman42 [59]

Answer:

A picture of a baseball being thrown tworad a batter at home plate.

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4 years ago