4 years ago

How do astronomers explain the orbit of hot jupiters

Physics

1 answer:

postnew [5]4 years ago

3 0

The correct answer is D

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A converging lens forms an image at 43 cm. A 9 cm tall object is placed in front of the lens at a distance of 90 cm.

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3 years ago

Which trends is indirectly proportional to effective nuclear charge

Minchanka [31]

Answer:

Atomic size

Explanation:

In the periodic table , atomic size is indirectly proportional to the effective nuclear charge .the atomic size reduces from left to right across the table. This is because electrons are added to the same shell.

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4 years ago

A lightbulb has a resistance of 195 Ω and carries a current of 0.62 A.

ki77a [65]

Answer:

Explanation:

Power is current times voltage:

P = IV

Voltage is current times resistance:

V = IR

Therefore:

P = I²R

Given I = 0.62 A and R = 195 Ω:

P = (0.62 A)² (195 Ω)

P ≈ 75 W

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3 years ago

A 3-kg ball is thrown with a speed of 8 m/s at an unknown angle above the horizontal. The ball attains a maximum height of 2.8 m

Alina [70]

Answer:

13.5 J

Explanation:

mass of ball, m = 3 kg

maximum height, h = 2.8 m

initial speed, u = 8 m/ s

Angle of projection, θ

use the formula of maximum height

$H = \frac{u^{2}Sin^{2}\theta }{2g}$

$2.8 = \frac{8^{2}Sin^{2}\theta }{2\times 9.8}$

Sin θ = 0.926

θ = 67.8°

The velocity at maximum height is u Cosθ = 8 Cos 67.8 = 3 m/s

So, kinetic energy at maximum height

$K=\frac{1}{2}mv^{2}$

K = 0.5 x 3 x 3 x 3

K = 13.5 J

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4 years ago

What charge does aluminum have?

Leya [2.2K]

AI has a charge of +3........................

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3 years ago

Read 2 more answers