2 years ago

Can someone please help? Thanks! The answer that I have marked is incorrect, im making corrections

Physics

2 answers:

Aleksandr-060686 [28]2 years ago

6 0

The correct answer would be D

artcher [175]2 years ago

3 0

Answer: It is D.

Explanation:

The compass needle pointed in the direction of the current's magnetic field.

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Suppose astronomers find an earthlike planet that is twice the size of Earth (that is, its radius is twice the radius of Earth).

JulijaS [17]

Answer:

4 times the mass of Earth

Explanation:

$M_1$ = Mass of Earth

$M_2$ = Mass of the other planet

r = Radius of Earth

2r = Radius of the other planet

m = Mass of object

The force of gravity on an object on Earth is

$F=\frac{GM_1m}{r^2}$

The force of gravity on an object on the other planet is

$F=\frac{GM_2m}{(2r)^2}$

As the forces are equal

$\frac{GM_1m}{r^2}=\frac{GM_2m}{(2r)^2}\\\Rightarrow M_1=\frac{M_2}{4}\\\Rightarrow M_2=4M_1$

So, the other planet would have 4 times the mass of Earth

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3 years ago

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Explanation:

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3 years ago

A projectile is shot at an angle 45 degrees to the horizontalnear the surface of the earth but in the absence of air resistance.

juin [17]

Answer:

Explanation:

Given

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launch angle $\theta =45^{\circ}C$