Answer:
How will her velocity change when does parachute first open?
The skydiver's weight is balanced by the air resistance. There is no resultant force and the skydiver reaches terminal velocity. When the parachute opens, the air resistance increases. The skydiver slows down until a new, lower terminal velocity is reached.
When a skydiver opens their parachute, they accelerate upwards. This is not the same as saying the move upwards. Acceleration is a change in velocity. They keep feeling an upward force (while moving downward) that slows them until they get to a new terminal velocity.
What force changes when a parachute opens?
An open parachute increases the cross-sectional area of the falling skydiver and thus increases the amount of air resistance which he encounters (as observed in the animation below). Once the parachute is opened, the air resistance overwhelms the downward force of gravity.
What happens if you open the parachute too early?
You are likely to drift off the drop zone. The winds can be pretty heavy at high altitudes, and unless you steer continuously they may blow you off-course. Needless to say, the refrigeration effect of the wind and slipstream will make you feel even colder than the mere altitude. Your landing is likely to be rough.
why is the temperature different in different places around world
Answer:
it is because they are placed geographically different.
How many kilograms does 300 cg of cheese weigh?
Answer:
300 centigrams of cheese would weigh 0.003 kilograms.
Explanation:
Which of the following factors contributes to the relatively greater atomic size of the higher atomic number elements within a particular family of the periodic table?
a. greater number of energy levels b. larger nuclei
c. greater number of protons d. smaller number of valence electrons
A compound is always made up of the same ____ in the same proportions.
Answer:
elements
Explanation:
A compound always consists of the same elements in the same ratio. If the same elements combine in different ratios, they form different compounds
1.As with any grid, the periodic table has ________ (left to right) and __________ (up and down).
2.Every row is called a ___________.
3.All the elements in the same period have the same number of _______.
Each column is called a __________.
4.The elements in each group have the _________ number of electrons in the outer orbital (or valence electrons).
5.Noble gases and helium are considered “happy” because their ______________ shell is ___________.
this was not a multiple-choice its about the periodic table
Answer:
rows and columnsperiodatomic orbitalsvalence electrons4.similar properties
5.electrons are very reactive
the outermost1. Which of the following substances are elements?
(a) bronze
(b) tin
(c) chromium
(d) solder
(e) propane
(1) arsenic
(g) nickel
1 point
QUESTION 5: What happens if you reset and place the refrigerator instead
of the wooden box with an applied force fo 200 Newtons for about 3
seconds? *
O The speed of the skateboard increases compared to the wooden box
O The speed of the skateboard decreases compared to the wooden box
Answer: The speed of the skateboard decreases compared to the wooden box
Explanation: well, umm... if you placed a refrigerator on a skateboard... that will be difficult to move, if anything it will brake the board!
A wooden box is much lighter than a refrigerator
When fat comes in contact with sodium hydroxide, it produces soap and glycerin. Determine whether this is a physical change or a chemical change. Explain your answer.
Explanation:
Answer. What comes in contact with Sodium Hydroxide to form soap and glycerine it is a chemical change because you cannot reverse this change and also the products formed are the results of a chemical reaction
Answer:
Its a chemical change because its property is changed.
Explanation:
What elements are involved with fission
Answer:
Several heavy elements, such as uranium, thorium, and plutonium, undergo both spontaneous fission, a form of radioactive decay and induced fission, a form of nuclear reaction.
If 5,800 j of energy are applied to a 15.2 kg piece of lead, by how much does the temp change if the specific heat of lead is 0.128
Answer:
The answer will be 2.98K
Explanation:
Using the formula:
Q = mc∆T
Q= 5,800 (heat in joules)
m= convert 15.2kg to g which is 15200g (mass in grams)
c= 0.128 J/g °c (Specific heat capacity)
∆T= what we need to find (temperature change)
5800J = 15200g x 0.128 x ∆T
= 2.98K
which can occur in a physical changen?
What percent of the universe's age is the first 400,000 years?
Answer:
the globuler cluster
Explanation:
hope this helps maybe next time show anwsers
Heat capacity of a material is dependent upon the material's mass.
True or false?
Hello
Answer:
True.This quantity is known as the specific heat capacity (or simply, the specific heat), which is the heat capacity per unit mass of a material. Experiments show that the transferred heat depends on three factors:
(1) The change in temperature,
(2) the mass of the system.
(3) the substance and phase of the substance.
true or false forming a hypothesis is the first strip of the scientific method
Answer:
True (probably)
Explanation:
I think it's true since creating hypothesis is the start of almost every scientific activities that we usually know. Please correct me if I'm wrong.
what method of cleaning tools and equipment do you follow or apply?
I clean with a rag wdym
7. Compared with our'Sun, the star Belelgeuse is
smaller, hotter, and less luminous
smaller, cooler, and more luminous
larger, hotter, and less lumulous
larger, cooler, and more luminous
Answer:
Larger, cooler, and more luminous.
Betelgeuse is red in color, and that means that the surface of it is cooler than the sun (bluish white is hottest, and red is lowest). It is also common knowledge that it is larger, so the correct option would be D. Hope this helped :)
Identify the error in the following statement:
A scientific theory is well-substantiated, fact-based, and unchangeable.
O A. Scientific theories can change as scientists continue to test ideas and gather evidence.
Please help me on this! I’ll mark you the brainliest
B. The statement is describing a hypothesis rather than a scientific theory.
O
C. A scientific theory is not well-substantiated.
D. A scientific theory is not fact-based.
Which percentage is in the appropriate range for a snack to be considered a “good source” of nutrients?
15 percent
35 percent
40 percent
50 percent
Answer:
15
Explanation:
Which substance can be decomposed by chemical means? a. calcium b. argon c. sodium chloride d. aluminum
Which two formulas represent compounds?
A. Ag
B. HCI
C. H2
D. NaCl
Answer:
it is A and BExplanation:
A and b are Sodium chloride and Hydrogen chloride which are both compounds.
What group will elements in the 7th column bond to?
Based on the physical properties of elements on the periodic table, which of the
following elements will most likely act as both a conductor and insulator? *
Aluminum
O Sulfur
O Copper
Silicon
What part of the sun do we see from earth?
Answer:
photosphere
Explanation:
photosphere
There are 3 main layers of the Sun that we can see. They are the photosphere, the chromosphere and the corona. Together they make up the "atmosphere" of the Sun. The part of the Sun that glows (and that we see with the naked eye) is called the photosphere
Answer:
There are 3 main layers of the Sun that we can see. They are the photosphere, the chromosphere and the corona. Together they make up the "atmosphere" of the Sun. The part of the Sun that glows (and that we see with the naked eye) is called the photosphere.
Explanation:
Yes, that's right a layer of the sun is called Corona
Coincidence, I think not
What is the mass of a hydrogen atom?
Answer:
1.00784 u
Explanation:
Answer:
1.00784 u
Explanation:
hydrogen atomm
What did electrons from the ionized air do to the oil drops?
Nuclear chemistry findings contradict __________________ theory of indivisible atoms.
Answer:
atomic theory
Explanation:
help me please i have it due soon
Answer:
B
Explanation:
I think it is B. That is because when you are falling, your just going to fall faster and faster.
I hope this helps!
Answer:
B
Explanation:
The third force the jumper experiences is a spring force due to the bungee cord. The amount that the bungee cord pulls back on the jumper depends on how far the cord has been stretched, i.e. the farther the jumper has fallen, the more the cord pulls back on him or her.
Looking at the periodic table, which of theses elements has the smallest atomic radius (A. Sodium B. potasaium C. Hydrogen D. LithIum)
Answer:
The answer is C. Hydrogen
Explanation:
It has a radius of 53 pm calculated.
What are some uses we might have for standing waves?
A Solution is a mixture of two or more substances_____
O a in water
O b. seperate from one another
O c in the same phase
Od come to room temperature
Answer:
In the same phase
Explanation:
Because when you make a solution you have to keep them in the same phase or you will oof.