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Ann [662]
3 years ago
14

Which was the first object made by humans to orbit earth?

Physics
1 answer:
Romashka-Z-Leto [24]3 years ago
6 0

The first human made object made to orbit earth was the Soviet Union's Sputnik 1, it launched the 4th of October 1957.

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Which of the following is the best definition of autoimmune disease?
MrRissso [65]

A condition in which self molecules are treated as non-self is the best definition of autoimmune disease.

<u>Option: D</u>

<u>Explanation:</u>

An autoimmune illness is a disorder wherein the immune system to attack the body inappropriately. The immune system usually watches off germs such as bacteria and viruses. If it detects these foreign invaders, an army of fighter cells is sent out to strike them.

The very general autoimmune diseases are like Systemic lupus erythematosus (lupus), Rheumatoid arthritis, IBD, multiple sclerosis (MS), type 1 diabetes mellitus, etc. Autoimmune disorders do not trigger sepsis, but there is a greater chance of developing complications in individuals with other forms of autoimmune disorders, which can activate sepsis.

4 0
3 years ago
Bolt starts the race not moving, but then increased his speed until he reaches a top speed. Once Bolt reaches his top speed he m
ludmilkaskok [199]

Answer:

a) move at a constant velocity

Explanation:

6 0
3 years ago
The friction force between a bag and the floor is 4 N. what is the net force acting on the bag? What is the acceleration of the
tester [92]
Well, if the bag is moving across the floor at a constant velocity. Then I would assume that the Fnet force is equal to 0, and thus the value of acceleration would also be equal to 0.
6 0
3 years ago
In Millikan's oil-drop experiment, one looks ata small oil drop held motionless between two plates. Take the voltage betwee the
AleksandrR [38]

Answer:

The charge on the drop  is

q = 1.741 x 10 ⁻²¹ C

Explanation:

Electric field due to plates

Ef = V/d  

Ef = 2033 V / (2.0 * 10^-2 m )

Ef = 101650 V/m

So, we can write  

Ef * q = m*g

q = m*g / E f

The mass can be equal using the density and the volume so:

m = ρ * v

The volume can be find as:

v = 2.298 x 10 ⁻ ¹⁶ m³

q =  ρ * v * g / Ef

q =  81 x 10 ³ kg/ m³ * 2.2298 x 10 ⁻ ¹⁶ m³ * 9.8 m/s² / 101650 V/m

The charge on the drop  is

q = 1.741 x 10 ⁻²¹ C

5 0
3 years ago
Describe the relationship between the Law of Conservation of Matter and balancing equations.
Yuliya22 [10]

Answer:

The mass of the products and reactants are the same on both sides of the equation.

The number of atoms of products and reactants are equal and hence it proves the law of conservation of mass.

.

3 0
3 years ago
Read 2 more answers
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