Help me with this please!!

Answers

Answer 1

Answer:

heterogeneous mixtures are those that are mixed, but not evenly. so you can see the different parts. compound is something made up of 2 or more elements. so, K will be a compound, as they are giving you the chemical formula, and showing there are 2 elements. and L is the heterogeneous mixture, as, even though it is crushed, the rocks can be picked apart.

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A 1,500-kg car is moving at a speed of 10 m/s. What is the car's kinetic energy?

Answers

Kinetic Energy of particle of mass, m moving with velocity, v is

K.E. = ½mv²

m= 1500 kg

v = 10 m/s

((1/2)*1500)* $10^(2)$

750*10=75000

KE=75 joules

How can you figure out kinetic energy?

According to classical physics, kinetic energy (KE) is determined by multiplying an object's mass by its velocity squared, or half of the mass (1/2*m). The kinetic energy of an object with a mass of 10 kilograms (m = 10 kg) travelling at a speed of 5 m/s (v = 5 m/s) is equal to 125 joules, or (1/2 * 10 kg) * 5 m/s2.

a vehicle with a mass of 1200 kg and a speed of 20 m/s. KE = ½mv 2

KE = ½ x 1200 x (400) = 240,000 J 2.

To learn more about kinetic energy refer to:

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Hello!

If The 1500 kg car will increase its velocity to 10 m/s. What Will be its kinetic energy ?

We have the following data:

m (mass) = 1500 kg

v (velocity) = 10 m/s

KE (kinetic Energy) = ? (in Joule)

Formula to calculate kinetic energy:

$\boxed{KE = (1)/(2) *m*v^2}$

Solving:

$KE = (1)/(2) *m*v^2$

$KE = (1)/(2) *1500*10^2$

$KE = (1)/(2) *1500*100$

$KE = (150000)/(2)$

$\boxed{\boxed{KE = 75000\:Joule}}\:or\:\boxed{\boxed{KE = 75\:kJ}}\Longleftarrow(kinetic\:energy)\:\:\:\:\:\:\bf\blue{\checkmark}$

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You do not know an object's velocity until you know its what?

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The speed of an object in a specific direction is expressed in velocity. you do not know an object's velocity until you know speed and distance.

What is velocity ?

The directional speed of an item in motion, as measured by a specific unit of time and observed from a certain point of reference, is what is referred to as velocity.

The speed of an object in a specific direction is expressed in velocity. Unlike speed, velocity is concerned with the movement's direction.

The difference between velocity and speed is how quickly and in which direction an object moves. Velocity in physics refers to speed in a specific direction. We identify a car's speed when we say it goes at 60 km/h.

Thus, you do not know an object's velocity until you know speed and distance.

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You do not know an object's velocity until you know its speed and direction

Of the following metals, which is the LEAST reactive? A. K
B. Ca
C. Na
D. Mg

Answers

Answer: D. Mg

Explanation:

Chemical reactivity is defined as the tendency of an element to loose of gain electrons.

Metals are the elements which lose electrons and hence, their chemical reactivity will be the tendency to lose electrons.

Their chemical reactivity increases as we move top to bottom in a group because the valence shell come gets far away from the nucleus. Thus, the loss of electron from the valence shell becomes easier due to lesser attraction between nucleus and valence electron.

Their chemical reactivity decreases as we move from left to right in a period .As, the electrons get added up in the same shell, the electron in the outermost orbital gets near to the nucleus. And hence, the electron will be difficult to lose.Thus, the chemical reactivity of metals decreases.

For the given options:

Potassium(K) belongs to Group 1 and period 4 of the periodic table.

Calcium (Ca) belongs to Group 2 and period 4 of the periodic table.

Sodium (Na)belongs to Group 1 and Period 3 of the periodic table.

Magnesium (Mg) belongs to Group 2 and Period 3 of the periodic table.

Order of reactivity of metals follow:

$K>Ca>Na>Mg$

Thus the LEAST reactive metal is Magnesium.

The Answer Should Be D.Mg

Is ability to conduct heat, physical or chemical?

Answers

the ability to conduct heat is physical because the object doesn't need to change its state in any way for this test to be taken

Physical because it does not need to change its state

So I am in science class and I have a quiz tomorrow and I forgot what classifying mean

Answers

Classifying is, in a nutshell, when you describe what something is. Classification of minerals, for example. If there is a white rock with black flecks, the classification would be Granite.

its describes the class that a head noun belongs to and characterized by not having a comparative or superlative.

mosquitoes get their food by sucking other animals blood, sometimes giving it disease. what type of symbiosis is this.

Answers

Answer:

The symbiosis between mosquitoes and the microorganisms responsibles of disease is endosymbiosis.

Explanation:

Mosquitoes usually have different microorganism inside their digestive tract. When mosquitoes suck other animals blood, their transmit those microorganisms (frequently parasites) to the animal. In these cases mosquitoes are called vectors, organisms that have microorganisms (endosymbionts) inside but do not suffer any consequences, they only act as a house for the endosymbiont.

I believe that would be a parasitism because one organism benefits yet the other is harmed.

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