3 years ago

Lava is rock that has undergone a physical change and has liquefied. What is known about this change?

Physics

1 answer:

RideAnS [48]3 years ago

3 0

It was super heated to turn in to a liquid

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When you sweat, what is the external stimuli? I need help asap. <br>

mixer [17]

Answer:

An External Stimulus is a stimulus that comes from outside an organism. Examples: You feel cold so you put on a jacket. When you sweat, the external stimulus is either you're anxious or hot.

Explanation:

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2 years ago

A 20 kg object is floating in space. What is its mass?

trapecia [35]

It's still 20 kg. Mass doesn't change according to gravity, only weight changes.

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3 years ago

Andy has been consuming a set number of calories and recently added an additional 100 calories in the form of a daily snack. Alt

I am Lyosha [343]

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Increase his activity and exercise levels and add more calories to gradually gain weight

Explanation:

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3 years ago

A spherical helium filled balloon (B) with a hanging passenger cage being held by a single vertical cable (C) attached to Earth

Gre4nikov [31]

Answer:

The tension is $T = 4326.7 \ N$

Explanation:

From the question we are told that

The total mass is $m = 200 \ kg$

The radius is $r = 5 \ m$

The density of air is $\rho_a = 1.225 \ kg/m^3$

Generally the upward force acting on the balloon is mathematically represented as

$F_N = T + mg$

=> $(\rho_a * V * g ) = T + mg$

=> $T = (\rho_a * V * g ) - mg$

Here V is the volume of the spherical helium filled balloon which is mathematically represented as

$V = \frac{4}{3} * \pi r^3$

=> $V = \frac{4}{3} * 3.142 *(5)^3$

=> $V = 523.67\ m^3$

$T = (1.225 * 523.67* 9.8 ) - 200 * 9.8$

$T = 4326.7 \ N$

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3 years ago

Please help on this one?

kupik [55]

Answer: A)30V. First find the current of the circuit. I=V/R(total resistance). So I=60/120=0.5. Now to find voltage drop in R3 use ohms law as given. V(of 3)=(0.5)(60)=30V

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3 years ago