Can someone help me on 2 science question,this is what they say
1. A teacher challenges.students to study moon phases to determine if what they have learned from the textbook is accurate. How might a student investigate claims made in a textbook that moo. phases occur in a 28-day cycle?
A. observe the phase of the moon each night until a full moon can be seen.
B. Compare the textbook phases to the actual moon phases seen in the night sky each night in 28 days periods over a three month time frame.
C. Compare diagrams of moon phases from the textbook to diagrams of moon phases on-line
D. Observe the moon phases seen in the night sky as often as possible over a six month period.

2. What causes the apperance of the moon change overtime?
A. The orbit of the Earth around the Moon and its distance from the sun.
B.The Moons position relative to the sun and earth as it revolves around sun.
C. the rotation of the moon on its axis
D. The distance of the moon to the sun

thank you

If the density of mercury is 13.5 g/cm³ in the gram per centimeter cube unit, then the density of the mercury would be 1.35×10⁴ in the kilograms per cubic meter

What is density?

It can be defined as the mass of any object or body per unit volume of the particular object or body. Generally, it is expressed as in gram per cm³ or kilogram per meter³.

By using the above formula for density

ρ = mass / volume

As given in the problem If the density of mercury is 13.5 g/cm³ in the gram per centimeter cube unit then we have to convert its value into kilograms per cubic meter.

1000 grams  = 1 kilogram

1 gram = 1/1000 kilograms

           =1×10⁻³ kilograms

10⁶ cubic centimeter = 1 cubic meter

1  cubic centimeter = 1/10⁶  cubic meter

                                = 1× 10⁻⁶ cubic meter

Given the density of the mercury  13.5 g/cm³

13.5 g/cm³ =  13.5 ×10⁻³ kilograms / 1× 10⁻⁶ cubic meter

                   = 1.35×10⁴ kilograms / cubic meter

Thus, we converted the density of mercury is 13.5 g/cm³ into 1.35×10⁴ kilograms / cubic meter

To learn more about density from here, refer to the link;

brainly.com/question/15164682

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Answer:

DO IY.T

Explanation:

Answer:

Yes

Explanation:

The truck has momentum since it is moving and momentum is a product of mass and velocity. After impact, part of momentum that the truck had is transferred to the car hence the car initially at rest moves a significant diatance. Here, we utilize the formula MV= (m+M)v where M and V represent mass and velocity of the truck while m is the mass of car, v is the common velocity. Note that some letters are capital while others small, don't confuse these.

Answer:

Explanation:

because it wouldnt connect

Hi!

The answer would be three days a week

Explanation

Bone-strengthening activity is key to ensuring that bones remain healthy to maintain an individual's lifestyle. The physical activity to strengthen bone may be brisk walking, exercises that include weights, or gymnastics to lift a few. The purpose of these activities are to observed to contribute to an increase in the bone mineral density of adolescents and children. Several studies have established that about 150 minutes a week for adults, or 3 days a week (60 minutes a day) for the youth should be devoted to bone strengthening physical activity to ensure good health of the body.

Hope this helps!

Answer:

three or more days a week

Explanation:

Hello, Lazarius

You see the fourmula to solve this is LxWxH so in this case we would multiply all thease numbers in order so 20 times 10 times 5 and get 1,000cm

Heres a better version

20cm*10cm*5cm= 1,000cm

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