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earnstyle [38]
3 years ago
14

Jane took two identical boxes, one made of black-colored paper and the other made of white-colored paper. She placed one ice cub

e in each of the two boxes. In which box will the ice cube melt first?
Black box, because black absorbs more heat than white
Black box, because black reflects more heat than white
White box, because white refracts more heat than black
White box, because white emits more heat than black
Biology
2 answers:
JulijaS [17]3 years ago
6 0
The Answer is 
A. Black box,because black absorbs more heat than white
An example is that on a sunny day you were wearing a black t-shirt you would be sweating you bottom off but if you were wearing a white t-shirt you would be less hot and not sweating your bottom off. Why? Because black absorbs more heat rays than white does
Dmitriy789 [7]3 years ago
4 0

its most likely A after reading it twice with ever word that is the right answer.

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How does the immune system function?
professor190 [17]

Answer:

Immune system of the body helps in fighting with the infectious agents that are foreign for the body. So the immune system protects us from infection.

When any foreign substance(antigen) comes in the body B-lymphocyte recognize it by binding the antigen through its receptor. After recognizing the antigen, B cell divides into antibody-producing plasma cell and memory cell.

Antibodies produced by plasma cells help in destroying the antigen by getting the antigen recognized by phagocytic cells or by complement activation.

B cells are antigen-presenting cell which present antigen to T cell and then T cell activates and produce chemicals that kill the antigen. Therefore the immune system has many immune cells that activate when an antigen comes in the body. This is how the immune system functions.

3 0
2 years ago
*EXTRA PTS* How much weight is needed for a 10 m high ball to achieve 400 J of potential energy?
mafiozo [28]

Answer:

,Mass of the Body = 10 kg.

Height = 10 m.

Acceleration due to gravity = 9.8 m/s².

Using the Formula,Potential Energy = mgh

= 10 × 9.8 × 10 = 980 J.

(b). Now, By the law of the conservation of the Energy, Total amount of the energy of the system remains constant.

∴ Kinetic Energy before the body reaches the ground is equal to the Potential Energy at the height of 10 m.

∴ Kinetic Energy = 980 J.

(c). Kinetic Energy = 980 J.

Mass of the ball = 10 kg.

∵ K.E. = 1/2 × mv²

∴ 980 = 1/2 × 10 × v²

∴ v² = 980/5

⇒ v² = 196

∴ v = 14 m/s.

7 0
3 years ago
Read 2 more answers
What factors that influence mass movement of particles
natka813 [3]

Mass movement, which is sometimes called <em>waste movement</em> or <em>slope movement, </em>is defined as the large movement of rock, soil and debris downward due to the force of gravity.

<h3>Factors affecting mass movement </h3>

1.  Slope  

    - Gravity provides the energy to move the materials.  

    - Rapid movements (e.g. landslide, slumping) etc.

2.  Water

     - Rainwater acts as a lubricant to weathered materials.  

     - Rainwater adds weight to weathered materials.  

3.   Rock structure  

     - Joints dipping downslope usually assists landslides, rockfalls, rockslide etc

4.  Vegetation  

     - Lack of vegetation cover to hold the loose particles.  

5.  Vibrations  

     - Earthquakes.  

     - Construction processes and mining operations.


3 0
3 years ago
How many membrane layers cover the nucleus?<br> O A. 3<br> O B. 1<br> O c. 2<br> O D.O
vladimir1956 [14]

Answer:

<h2>nuclear envelope is made is known as nuclear membrane it is covered by two lipids by layer</h2><h3><em>So</em><em> </em><em>answe</em><em>r</em><em> </em><em>is</em><em> </em><em>2</em></h3>
8 0
3 years ago
A(n) _______ is a pure substance that can't be broken down into simpler substances by chemical or physical means.
Rasek [7]
You don't have the options to choose from but I believe from past experience the answer to the question is element. 
6 0
3 years ago
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