All categories

2 years ago

What is the appropriate age of the earth based on current scientific theory

Physics

2 answers:

Ilya [14]2 years ago

7 0

The closet one is B but it 4.543 billion years

Zielflug [23.3K]2 years ago

7 0

The answer to this question is b , any other answer is unacceptable because the oldest rock on earth is 4 billion years old and when scientist look at earths layer they came to the conclusion that eearth is around the age of 4.6 billion years old not million :)

You might be interested in

Two blocks connected by a rope of negligible mass are being dragged by a horizontal force (see figure below). Suppose F = 65.0 N

vovangra [49]

Refer to the diagram shown below.

g = 9.8 m/s², and air resistance is ignored.

For mass m₁:
The normal reaction is m₁g.
The resisting force is R₁ = μm₁g.

For mass m₂:
The normal reaction is m₂g.
The resisting force is R₂ = μm₂g.

Let a = the acceleration of the system.
Then
(m₁ + m₂)a = F - (R₁ + R₂)
(14+26 kg)*(a m/s²) = (65 N) - 0.098*(9.8 m/s²)*(14+26 kg)
40a = 65 - 38.416 = 26.584
a = 0.6646 m/s²

Answer: 0.665 m/s² (nearest thousandth)

7 0

3 years ago

Four cylindrical wires of different sizes are made of the same material. Which of the following combinations of length and cross

anzhelika [568]

Answer:

Explanation:

For resistance of a wire , the formula is as follows .

R = ρ L/S

where ρ is specific resistance , L is length and S is cross sectional area of wire .

for first wire resistance

R₁ = ρ 3L/3a = ρ L/a

for second wire , resistance

R₂ = ρ 3L/6a

= .5 ρ L/a

For 3 rd wire resistance

R₃ = ρ 6L/3a

= 2ρ L/a

For fourth wire , resistance

R₄ = ρ 6L/6a

= ρ L/a

So the smallest resistance is of second wire .

Its resistance is .5 ρ L/a

7 0

2 years ago

During convection of air currents,

pav-90 [236]

During convection of air currents, cool air sinks. <em>(b)</em>

4 0

3 years ago

Read 2 more answers

A proton with a velocity in the positive x-direction enters a region where there is a uniform magnetic field B in the positive y

Genrish500 [490]

Answer:

Positive z direction.

Explanation:

The magnetic force acting on the electron is given by the formula as :

$F=q(v\times B)$

q is the charge on proton

v is the speed of proton

B is the magnetic field

It is mentioned that the proton is moving with a velocity in the positive x-direction. The uniform magnetic field B in the positive y-direction such taht,

q = +e

v = vi

B = Bj

$F=e(v\ i\times B\ j)$