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4 years ago

How does changing the position of a light source such as a flashlight affect the size of an object's shadow

1 answer:

4 0

If u were holding the flashlight above the object the shadow would be a circle on the ground if u were holding the flashlight in front of the object it would make a long slim shadow f the object
Ex: if I was standing near a wall and u held a flashlight in my face, not only I will be blinded by the bright light but it make a shadow of my head on the wall. different angles make different shadows

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HELPPPPPPP<br><br>DETERMINE THE CHARGE OF ELECTRON CLOUD OF POTASSIUM

tensa zangetsu [6.8K]

Answer:

Explanation:

A Potassium atom is represented with the sign "K" in chemistry and have atomic number 19.

The charge of electrons causes a matter to experience a force and it can be positive or negative.

In Potassium atom, the electric charge is +1 to enter a stable electron configuration as there is only one valence electron in the outermost shell of potassium atom. As potassium atom will lose electron it will become positively charged.

Hence, the correct answer is "+1".

6 0

3 years ago

Compounds A and B react to give a single product, C. Write the rate law for each of the following cases and determine the units

emmasim [6.3K]

Answer:

Explanation:

Rate laws are mathematical expressions which define the relationship that exists between the rate of a chemical reaction and the concentration of the reacting components. Rate laws take the following form:

$rate = k [A]^{x} [B]^{y} [C]^{z}$ ...

where k = rate constant

[A], [C] and [C] represent the molar concentrations of the reactants

k, x, y, and z are determined experimentally by observing how the rate of reaction changes with the concentrations of the reactants.

If x=1, the reaction is first order for [A]. Also, if y=2, the reaction is second order for [B] and so on...

The overall order of the reaction is the sum of the orders with respect to each reactant. Therefore, the overall order of the reaction is x+y+z.

5 0

3 years ago

Why should hypothesis be testable?

iren [92.7K]

When a hypothesis is testable, it means that it's possible to see whether the prediction is true or not. Testing a hypothesis can include conducting experiments, collecting data and making observations.

4 0

3 years ago

Read 2 more answers

Identify each of the following half-reactions as either an oxidation half-reaction or a reduction half-reaction. half-reaction i

Natasha2012 [34]

Answer: Oxidation reaction: $Al(s)\rightarrow Al^{3+}(aq)+3e^-$

Reduction reaction: $Sn^{2+}(aq)+2e^-\rightarrow Sn(s)$

Overall redox reaction : $2Al(s)+3Sn^{2+}(aq)\rightarrow 2Al^{3+}(aq)+3Sn(s)$

Explanation:

Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

$Al(s)\rightarrow Al^{3+}(aq)+3e^-$

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

$Sn^{2+}(aq)+2e^-\rightarrow Sn(s)$

Overall redox reaction : $2Al(s)+3Sn^{2+}(aq)\rightarrow 2Al^{3+}(aq)+3Sn(s)$

5 0

3 years ago

Punnett Squares represent the probability of traits in offspring as a result of what type of

Xelga [282]

Answer:

Explanation:

B is incorrect because asexual reproduction produces an offspring exactly the same as it's parent. Thus the probability does not need to be calculated.

C and D logically do not make sense since B is incorrect and A is correct. I provided the explanation why it is incorrect above.

Thus A is the correct answer.

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Hoped that helped! If it did, choose me as Brainliest!

3 0

3 years ago

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