Which part of the atom determines the chemical properties and chemical reactivity of an element?
A. The number of valence electrons
B. The total number of electrons
C. The number of neutrons
D. The number of protons
10pts} If a ball is thrown straight up into the air with a velocity of 15 m/s. How many seconds will it take for the ball to reach its peak? (Assume no air friction and g = -9.81 m/s²)
Please give the most detailed answer. I need reasoning as well. Brainliest to the person who gives the best answer
Answer:
-81.2361 m/s
Explanation:
15 m/s 15 m/s
- 9.81 m/s^2= 96.2361 - 96.2361
It will take for the ball to reach its peak 81.2361 m/s if a ball is thrown straight up into the air with a velocity of 15 m/s.
15 m/s
- 9.81 m/s^2= 96.2361
Which formula has been used for change in velocity?Use the formula for change in velocity equal the acceleration times the time, considering that the only acceleration acting is that of "g" (g = 9.8 m/s^2). Consider also that at the top of the trajectory is when the velocity becomes zero and the motion changes from upwards to downwards.It takes the tennis ball approximately 0.78 seconds to reach the maximum height.
Calculate the ball's greatest height using the vertically modelling method, h = -16t2 + vt + s, where v is just the initial velocity at feet/second and s is indeed the height in feet.
Zero The ball travels upward when you throw it, but because gravity is pulling on it, its speed diminishes as it ascends.The ball begins to slow down, and during the peak of its journey, it has zero velocity.
Therefore, It will take for the ball to reach its peak 81.2361 m/s if a ball is thrown straight up into the air with a velocity of 15 m/s.
15 m/s
- 9.81 m/s^2= 96.2361
Learn more about velocity on:
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What state of matter are the Inner Planets
Answer:
Solid
Explanation:
The four inner planets are also called "the rocky planets" because of their solid state
Hey people! I sorta need help. :))
Answer:
1. Attract
2. Repel
3. Attract
4 Repel
always remember when dealing with magnets, Opposites attract
A baseball bat his a baseball with a force of 100 Newtons. What is the force and its direction exerted by the ball on the bat?
I think it's "100 Newtons in the opposite direction of Net Force Motion".
could someone help me i need the real answers fast
will give brainiest
Where's the question, it's blank?
ANSWER As Soon As Possible
The image is blank
Explanation:
Which of the following could describe the velocity of an object?
50 m/s
50 m east
50 m/s east
50 m/s^2
Answer:
Explanation:
50 ms east
Put them in order need help plz
Answer:Betelgeuse
Antares
Sirius
Archutus
The sun
Explanation:
I looked on safari
Lauren's SUV was detected exceeding the posted speed limit of 60 kilometers per hour, how many kilometers per hour over the limit would she have been traveling if she had covered a distance of 10 kilometers in 6 minutes? (6 minutes = 0.1 hr)
40 mph
this is because if we multiply both by 6, we get 60 and 36 minutes but we cant have 36 minutes since it has to be 60 so we can get mph so we would have to multiply both by 10 makeing the time 60 and the kilometers 100 and 60 minus 100 is 40
Please fill in the blank if you don't mind.
Answer:
is there answer choices?
Explanation:
Hey I need help w/ this pic below ASAP!!!
Pls will mark brainliest:) Not joking lol
helpppppppppppppppppp
position 2
i know cause i already learned this
PLEASE SOMEONE HELP ME ILL GIVE THE PERSON BRAINLIEST
If a ball was dropped from the Empire State Building, or from the Golden Gate Bridge, or from the Statue of Liberty, and from the top of a table, tell Gravitron how long it would take each of the balls to hit the bottom. Fill in the table below:
Dropped from:
Time (seconds)
Empire State Building
Golden Gate Bridge
Statue of Liberty
Tabletop
Please help meh
Why should you never pick up a hot pot by its metal handle? *
A The handle will be hot because metal is a good conductor of heat.
B The handle will be slippery because metal is slippery when heated.
C The handle will be soft because the metal in cooking pans is easily melted.
D The handle will be freezing cold because metal turns heat to cold.
Answer:
A : the handle will be hot because metal is a good conductor of heat
Explanation:
B The handle will be slippery because metal is slippery when heated. - there is no evidence of this literally anywhere lol
C The handle will be soft because the metal in cooking pans is easily melted. - cast irons melting degree is 1204°C, so unless your cooking lava or something the handle is not gonna melt
D The handle will be freezing cold because metal turns heat to cold. - No, because the containments of the pot are hot not cold, and metal conducts heat
Answer:
A is the correct answer.
Explanation:
b = false
c = false
d = false
a = true!!!
Where does oceanic and continental crust meet?
How many moles of C02 are needed to fill an 0.125 m3 tank to a pressure of 1330.0 atm at 29.0 C (Celsius)
please include procedure if you can
Answer:
A temperature of 100.0°C?
Explanation:
The volume of a sample of gas measured at 25.0°C and 1.00 atm pressure is 10.0 ... How many moles are in a gas sample occupying 0.500 I at 170 mmHg and 25° C? ... Which of the following gases would occupy the largest volume at 25°C and ... oxygen, 3.0 mol of nitrogen, and 1.0 mol of carbon dioxide when the total.
Plot the stars A-E. Once plotted determine their color and type.
Answer:
color 1 blue color 2 purple 3 green 4 red 5 i still do not know
Explanation:
What change does this cause concerning weather?
Answer:
More extreme weather.
Explanation:
The Conveyor Belt of tides functions on a local and global level to spread out the cold and hot temperature differences on the planet. It is a delicate but important process that is easily disrupted, which causes it to slow down. And when it slows down, all those temperature differences will become more concentrated, causing colder places to be colder and hotter places to be hotter, ultimately leading to more extreme weather events as these cold and hot spots collide more violently than before.
Here's a picture I found on it:
heres free wallpapers and pnts! :)) (phone and PC and chromebook wallpapers) (credits to those who made them !)
Answer: :DD
Explanation:
Write a main idea statement about the nervous system.
Answer:
The nervous system is the major controlling, regulatory, and communicating system in the body. It is the center of all mental activity including thought, learning, and memory. Together with the endocrine system, the nervous system is responsible for regulating and maintaining homeostasis.
Explanation:
Write a report on waves. Some questions you might consider are: What makes a wave? Why are some waves small and some large? How are waves classified? Are there different kinds of waves? What happens when a wave meets the shore? Where in the world do you find the best waves for surfing?
Answer:
The waves have energy that wave back and forth because the waves are never still, they are always moving. There are different types of waves because sometimes (like a tsunami) the waves are affected by other things like the earth plates. Portugal is one of the best places to surf because they have waves that can reach up to 6 to 15 feet high!
Explanation:
If Neptune’s mass were reduced, what could be done to maintain the same force of gravitational attraction between Neptune and the Sun?
Why is Christchurch, New Zealand’s air temperature cooler than usual during El Nino years?
Answer:
During normal years energy transfers from the ocean to the air. However, during El Nino years, the current is not as warm, so less energy will transfer from the current to the air, making Christchurch cooler than usual. During El Niño years, the normal prevailing winds are disrupted.
Explanation:
During normal years energy transfers from the ocean to the air. However, during El Nino years, the current is not as warm, so less energy will transfer from the current to the air, making Christchurch cooler than usual. During El Niño years, the normal prevailing winds are disrupted.
Help no link and answer please
11. What tool would help the students get a close look at the rock sample? *
12. What tool would help the students find the mass of the rock sample? *
Answer:
12. you measure mass with a balnece. such as a triple balence beam or an electronic balance.
i dont know 11 sorry
What information is used to determine earthquake risk?
Answer:
There are several pieces of information that are used to determine earthquake risk:
Seismic data: This includes information about the frequency, size, and location of earthquakes that have occurred in a particular area. This can help scientists understand the likelihood of future earthquakes and how strong they are likely to be.
Geological data: This includes information about the geology of an area, including the types of rocks and soil present, the structure of the Earth's crust, and the presence of fault lines or other features that may affect the likelihood of earthquakes.
Population data: The number of people living in an area can also be a factor in determining earthquake risk, as a larger population is more likely to be affected by an earthquake than a smaller one.
Building data: Information about the types and condition of buildings in an area can also be used to determine earthquake risk, as buildings that are poorly constructed or not designed to withstand earthquakes are more likely to be damaged or collapse.
Insurance data: Insurance companies may also use data about past earthquakes and their effects to help assess the risk of future earthquakes in an area.
Overall, the risk of earthquakes is determined by a combination of these and other factors, and it can vary significantly from one location to another.
Answer:
In order to determine earthquake risk, information on the density of buildings and people (exposure), the vulnerability of the built environment, and robust earthquake hazard assessments, including the impact of local soil conditions, are needed.
pick 2 not one answer please and thank you
Answer:
B and D
Explanation:
Please help science final test. 6 question 22 points and I will choose brainliest.
1.Where is matter found?
2. Use your five senses to describe hot buttered popcorn. (use all 5 senses) *
3. What property of matter can be observed using a pan of water? *
4. Paper clips are made of steel, which has iron in it. Do you expect paper clips to be attracted or not attracted to a magnet? Why or why not? *
5. What properties of an object would you observe when you use a metric ruler? *
6. What metric unit is used to describe the mass of an object? *
Answer:
1. Even though matter can be found all over the Universe, you will only find it in a few forms (states) on Earth. We cover five states of matter on the site. Each of those states is sometimes called a phase. There are many other states of matter that exist in extreme environments.
2. hot buttered popcorn, burns my tongue, smells buttery, looks yellowish-white, tastes like butter, and sounds like popping corn.
3. The water is a liquid so it has the same shape had the pan.
4.Paper clips are attracted to magnets because iron has a magnectic force.
5. The first (or smallest measurement) you would see is the hash marking millimeters, which is written as "mm". 1mm equals the thickness of a dime. The unit of measure that is most often displayed on a metric ruler would be centimeters written "cm". 10mm equals 1cm and 2.5cm is about equal to 1 inch. Centimeters are displayed for viewing like inches are, marked on the ruler in increments of 1, 2, 3, 4... and so on. Usually to 30cm which is slightly less than 12 inches.
6. Mass is used to measure the weight of an object. For example, you are measuring the mass of your body when you step on to a scale. In the metric system of measurement, the most common units of mass are the gram and kilogram.
Explanation:
ITS 9:04 AND I ONLY HAVE TILL 10:00 PLEASE HELP FAST!
Classify the forms of energy described in each scenario by filling in the correct term.
A windmill’s blades move from the blowing wind.
The movement of the blades represents______ energy.
The visible light that allows people to see where they are going describes______ energy.
Answer:
The movement of the blades represents kinetic energy
The visible light that allows people to see where they are going describes light energy
Answer: 1. Kinetic 2. Radiant
Explanation:
Harry is pedalling on a stationary bicycle, which lights up a signboard. What energy conversion takes place?
Answer:
Kinetic to Electrical to Light.
Explanation:
Kinetic energy from Harry will be converted to electrical energy within the bicycle. This electrical energy travels to the signboard, which then lights up, producing light energy.