3 years ago

Which element is likely to be the most reactive? bromine (Br) chlorine (Cl) fluorine (F) iodine (I)

Physics

2 answers:

SSSSS [86.1K]3 years ago

8 0

Answer:

fluorine

Explanation:

RUDIKE [14]3 years ago

5 0

Answer:

Fluorine is the most reactive element

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What clouds are best associated with thunderstorms?

Oliga [24]

Answer:

Cumulus Congestus & Cumulonimbus Clouds

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3 years ago

If the speed of a car is increased by 80%, by what factor will its minimum braking distance be increased, assuming all else is t

Vikki [24]

Answer:

$KE_2=3.24 \times KE_1$

Explanation:

given,

Speed of car = v

new speed of car v'= 1.8 v

Kinetic energy of the car

$KE_1 =\dfrac{1}{2}mv^2$

new Kinetic energy of energy

$KE_2 =\dfrac{1}{2}mv'^2$

$KE_2=\dfrac{1}{2}m(1.8v)^2$

$KE_2=3.24 \times \dfrac{1}{2}mv^2$

$KE_2=3.24 \times KE_1$

hence, the kinetic energy is increased by the factor of 3.24.

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3 years ago

Belle is walking south at an average velocity of 6 km/h. How many kilometers can she walk in three hours?

aivan3 [116]

Explanation:

I think the answer is 18 km/h

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2 years ago

The dog has ran 100 meters in 20 seconds and then 300 meters in 25 seconds what was the average speed of the dog over the entire

Vlada [557]

Explanation:

the speed of the dog was 400

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2 years ago

When a crown of mass 14.7 kg is submerged in water, an accurate scale reads only 13.4 kg. What material is the crown made of?

Bogdan [553]

Answer:

ρ = 1.13 10⁴ km/m³

Explanation:

For this exercise we use Newton's equilibrium equation

B –W + W_scale = 0

Where B is the thrust and W_scale is the balance reading

The push is given by Archimedes' law

B = ρ_water g V

B = W- W_scale

B = m g - m_scale g

Let's calculate

B = 14.7 9.8 - 13.4 9.8

B = 12.74 N

ρ_water g V = 12.74

V = 12.74 / ρ_water g

V = 12.74 / 1000 9.8

V = 0.0013 m³

Let's use density

ρ = m / V

We replace

ρ = 14.7 / 0.0013

ρ = 1.13 10⁴ km/m³

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3 years ago