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2 years ago

People cannot see certain types of light waves because:

Physics

1 answer:

enot [183]2 years ago

5 0

Answer:

Light comes in different colors like radio, ultra violet, gamma-ray, etc, and they are invisible to the bare eye

Explanation:

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g A rock is suspended from a string, and it accelerates downward. Which one of the following statements is correct? Group of ans

Luda [366]

Answer:Magnitude of tension in the string is less than the weight of rock

Explanation:

Given

Rock is suspended from the string and it accelerates downward

Let T be the Tension in the string

thus

mg-T=ma

where a =acceleration of rock

T=mg-ma

T=m(g-a)

Thus Tension in the string is less than the weight of rock

3 0

4 years ago

What is the direction of acceleration due to gravity ?

mafiozo [28]

The direction of acceleration due to gravity is always towards earth, going downwards.

mark me brainliesttt :))

4 0

3 years ago

Assuming a roughly spherical shape and a density of 4000 kg/m3, estimate the diameter of an asteroid having the average mass of

vredina [299]

Explanation:

It is given that,

Density of asteroid, $\rho=4000\ kg/m^3$

Mass of asteroid, $m=10^{17}\ kg$

We need to find the diameter of the asteroid. The formula of density is given by:

$\rho=\dfrac{m}{V}$

V is the volume of spherical shaped asteroid, $V=\dfrac{4}{3}\pi r^3$

$r^3=\dfrac{3M}{4\pi \rho}$

$r^3=\dfrac{3\times 10^{17}\ kg}{4\pi \times 4000\ kg/m^3}$

$r^3=\sqrt{5.96\times 10^{12}}$

r = 2441311.12 m

Diameter = 2 × radius

d = 4882622.24 m

$d=4.88\times 10^6\ m$

Hence, this is the required solution.

8 0

3 years ago

CuCl2

MArishka [77]

Answer:

Copper ( II ) chloride

Explanation:

According to the nomenclature ,

The metal ion name is followed by the non-metal ion
The oxidation state of the metal is to be mentioned in the brackets .
As $CuCl_{2}$ has two $Cl^-$ ions , and the net charge on the compound is zero , the charge on copper is :

$Cu^{x}+2Cl^-=0\\x-2=0\\x=2+$

thus ,

⇒ $Cu^{2+}$

∴ ,

The proper nomenclature is :

Copper ( II ) chloride

6 0

4 years ago

In an eslastic ,the momentum is_______and the mechanical energy is

DIA [1.3K]

Answer:

In an elastic collision, the momentum is conserved and the mechanical energy is conserved too.

Explanation:

There are two types of collisions:

- Elastic collision: in an elastic collision, the total momentum before and after the collision is conserved; also, the total mechanical energy before and after the collision is conserved.

- Inelastic collision: in an inelastic collision, the total momentum before and after the colllision is conserved, while the total mechanical energy is not conserved (in fact, part of the energy is converted into other forms of energy such that thermal energy, due to the presence of frictional forces)

3 0

3 years ago