If a hypothesis states that children who consume a large quantity of sugar in the morning will perform more poorly in school than children who do not, then what will be the independent variable? A) children eating a healthy breakfast in the morning
B) children performing poorly in school
C) children performing well in school
D) children consuming a large quantity of sugar in the morning

Answers

Answer 1

Answer: the answer is letter a

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Which is larger, 65mph or 120kph? As a percentage, how much faster is one than the other?

Answers

120 kilometers is equivalent to 74.565 miles,
or 14.71% greater than 65 miles.

65 mph is 104.6067 kph that means that 120 kph is bigger than 65 mph.
104.6067 kph x 115% = 120.3 kph (rounded)
120 kph is 115% faster than 65 mph.

A charged atom is called a(n) _____.

Answers

A charged atom is called a(n) ion. It can be negative charge or positive.

The answer to this is ion.

Cucumbers are sold for 3.50 QAR per kilogram. If you purchase 0.7kg of cucumbers how much will it cost? a. 5.95QAR b. 4.20 QAR c. 2.80QAR d. 2.45QAR

Answers

Answer:

d. 2.45 QAR.

Explanation:

To calculate the cost of purchasing 0.7kg of cucumbers at a rate of 3.50 QAR per kilogram, we can use the formula:

Cost = Rate × Quantity

Here's how to calculate it:

1. Multiply the rate per kilogram (3.50 QAR) by the quantity (0.7kg):

- Cost = 3.50 QAR/kg × 0.7kg

2. Calculate the result:

- Cost = 2.45 QAR

Therefore, the cost of purchasing 0.7kg of cucumbers at a rate of 3.50 QAR per kilogram is 2.45 QAR.

A parallel-plate air capacitor is made from two plates 0.210 m square, spaced 0.815 cm apart. it is connected to a 120 v battery. if the plates are pulled apart to a separation of 1.63 cm , suppose the battery remains connected while the plates are pulled apart. part a what is the capacitance?

Answers

Answer:

at the beginning: $2.3\cdot 10^(-10) F$

when the plates are pulled apart: $1.1\cdot 10^(-10) F$

Explanation:

The capacitance of a parallel-plate capacitor is given by

$C=k \epsilon_0 (A)/(d)$

where

k is the relative permittivity of the medium (for air, k=1, so we can omit it)

$\epsilon_0 = 8.85\cdot 10^(-12) F/m$ is the permittivity of free space

A is the area of the plates of the capacitor

d is the separation between the plates

In this problem, we have:

$A=0.210 m^2$ is the area of the plates

$d=0.815 cm=8.15\cdot 10^(-3) m$ is the separation between the plates at the beginning

Substituting into the formula, we find

$C=(1)(8.85\cdot 10^(-12)F/m)(0.210 m^2)/(8.15\cdot 10^(-3) m)=2.3\cdot 10^(-10) F$

Later, the plates are pulled apart to $d=1.63 cm=0.0163 m$ , so the capacitance becomes

$C=(1)(8.85\cdot 10^(-12)F/m)(0.210 m^2)/(0.0163 m)=1.1\cdot 10^(-10) F$

What is one way that fission and fusion are similar?

Answers

Well, they both start chain reactions and they are also both used in certain nuclear bombs. Also they are both natural processes that occur in the sun, where hydrogen fuses with helium atoms and then they split by the process of fission.

Sunlight is a form of electromagnetic energy.
a. True
b. False

Answers

It is true that sunlight is a form of electromagnetic energy. Electromagnetic energy is a form of radiant energy that released by electromagnetic radiation. One example of an electromagnetic radiation is the visible light. And visible light can be radio waves, infrared light and X - rays. The rays of the sun are a form of visible light. It has an electromagnetic radiation of UV (ultra violet) rays. That is why the radiation at day is greater than at day due to sun’s rays.

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The term used to describe the quantity of matter that a body possesses is

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