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3 years ago

Why did the scientific community initially reject Wegener's theory of continental drift?

Physics

2 answers:

MAVERICK [17]3 years ago

4 0

Answer:

Explanation:

zavuch27 [327]3 years ago

3 0

Answer:

A. Wegener could not explain what made the continents move.

Explanation:

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A molecule of roughly spherical shape has a mass of 6.10 × 10-25 kg and a diameter of 0.70 nm. The uncertainty in the measured p

Ilia_Sergeevich [38]

Answer:

$\Delta v = 0.123 m/s$

Explanation:

As per the law of uncertainty we know that

$\Delta p \times \Delta x = \frac{h}{4\pi}$

now we know that

$\Delta x = 0.70 nm$

$m = 6.10 \times 10^{-25}$

also we have

$h = 6.626 \times 10^{-34} J.s$

now we will have

$m\Delta v \times \Delta x = \frac{h}{4\pi}$

$(6.10 \times 10^{-25})\Delta v \times (0.70 \times 10^{-9}) = \frac{6.626 \times 10^{-34}}{4\pi}$

$\Delta v= 0.123 m/s$

4 0

3 years ago

Kyle lays a mirror flat on the floor and aims a laser at the mirror. The laser beam reflects off the mirror and strikes an adjac

Elena L [17]

Answer:

The angle of incidence is $\theta_i =42.6^o$

Explanation:

The diagram for this question is shown on the first uploaded image

From the question we are told that

The distance between the mirror and the wall is $a = 33.7 cm$

The height of the above the mirror is $b = 36.7 cm$

Generally the angle which the reflected ray make with the mirror is mathematically evaluated as

$\alpha =tan ^{-1} (\frac{b}{a})$

substituting values

$\alpha = tan ^{-1}( \frac{36.7}{33.7})$

$\alpha =47.4^o$

From the diagram we can deduce that the angle of incidence is

$\theta_i = 90 - \alpha$

So $\theta_i = 90 - 47.4$

$\theta_i =42.6^o$

5 0

3 years ago

Write Four Facts About Why Bees Are Important To The Ecosystem?

Sauron [17]

Answer:

They Pollinate Food Crops. Honeybees always travel incredible distances to look for pollen

They Pollinate Wild Plants. Bees not only help with food crops, but they also pollinate wild plants.

Employment.

They Produce Honey

Explanation:

8 0

2 years ago

Why does a small pebble sin in water?

strojnjashka [21]

A small pebble would sink in water because it is to light and can’t hold itself up in the water. Hope this helped!

6 0

3 years ago

A 5 kg object moving to the right at 4 m/s collides inelastically with a 5 kg object

skad [1K]

Answer:

The linear momentum of a particle with mass m moving with velocity v is defined as

p = mv (7.1)

Linear momentum is a vector . When giving the linear momentum of a particle you must

specify its magnitude and direction. We can see from the definition that its units must be

kg·m

. Oddly enough, this combination of SI units does not have a commonly–used named so

we leave it as kg·m

The momentum of a particle is related to the net force on that particle in a simple way;

since the mass of a particle remains constant, if we take the time derivative of a particle’s

momentum we find

dt = m

dt = ma = Fnet

so that

Fnet =

dt (7.2)

5 0

2 years ago