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Tems11 [23]
3 years ago
10

Gravity helps scientists launch spacecraft out of Earth’s atmosphere. truth or false

Biology
1 answer:
olasank [31]3 years ago
4 0

True! because without gravity the spacecraft wouldn't go where there wanted it, in the time that they wanted it



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Lymph carries all of the following except
jeyben [28]
The lymphatic system is to carry lymph nodes, lymph, and lymphatic vessels. However, it is not structured to carry blood along its way. The human's lymphatic system's function is to move the lymph from tissues to the bloodstream. 
6 0
3 years ago
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A forensic scientist in using a standard biological microscope with 15 objective and 5 eyepiece to examine a hair from a crime s
SIZIF [17.4K]

The given data is Magnification, M = 15

Length of the tube , L = 16 cm

The focal length of the lens can be calculated by:

M = L/F

Substituting the value, we get:

15 = 16/f

f = 16/15

f = 1.067 cm

Using the equation of magnification we get,

M = v/u

Substituting the values we get:

15 = v/u

v = 15 u

With the help of lens formula, calculate the object distance:

1/f = 1/v + 1/u

Substituting the value we get,

1/1.067 = 1/15u + 1/u

0.937 = 1.067/u

u = 1.13 cm or 1.1 cm.

Hence, the object distance is 1.1 cm.


3 0
3 years ago
What are the terms describes the dna–protein complexes that look like beads on a string?
marishachu [46]

Answer: The question is incomplete,below is the complete question.

What are the terms describes the dna–protein complexes that look like beads on a string?

A) Chromatin

B) 30-nanometer fibre

C) Histones

D) Nucleosome

The correct answer is option D

Explanation: A Nucleosome is the basic fundamental unit of a DNA, and the fundamental sub-unit of a Chromatin.

The Nucleosome is the basic packing unit of DNA,it is built from histone proteins. A nucleosome is made up of 8 histones proteins resembling a thread wrapped round a spool.

The smallest bundle of DNA is known as a Nucleosome,a Nucleosome is produced through interaction between DNA and histone proteins.

5 0
3 years ago
If a circle has a diameter of 16 feet, which expression gives its area in square
bagirrra123 [75]

Answer:

The options are unclear but the answer is 8^2π square feet or 64π sqfeet

Explanation:

Area of a circle is denoted by: πr^2 where r is the radius of the circle.

In this question, the diameter was given. The diameter of a circle is twice the radius. Therefore, in order to get the radius, we divide the diameter by 2 i.e. r = d/2

= 16/2 = 8 feet.

Thus, the radius = 8 feet.

Hence, Area of a circle = πr^2

= π × 8^2

= 64π or 8^2π sqfeet.

6 0
3 years ago
Some structures, like the leg bones in the modern day whale, no longer have a useful
Vlad1618 [11]
Both the pelvis and femur of a whale are called vestigial structures! Another example of this is a human’s tail bone. Hope this helped!
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