the first group of the periodic table is known by what name
Answers
Answer:
Alkali Metals
Explanation:
If the first column of elements is what your talking about , they're the Alkali Metals .
:)
Answer:
The first group (1A) of elements are classified as Alkali metals.
Related Questions
What causes an electric charge?
Question 1 options:
The movement of electrons due to a difference in electric potential energy
The movement of protons due to a difference in electric potential energy
The movement of neutrons due to a waterfall
The movement of electrons due to kinetic energy
Answers
Answer: The movement of electrons due to kinetic energy
Explanation: best one i could see not 100% tho
Answer: The correct answer is A.
Explanation: Reason being is that if you look it up it'll explain that it is the movement of electrons being removed or added.
Also, I know this is truly correct because I've taken the test myself.
Please ignore the other persons answer because they are incorrect.
I hope this helps!! :D
Force 1: The force which pulls objects towards the surface of a planet.
Force 2: The force which attracts iron nails towards a magnet.
Which statement is true about the forces?
Force 1 describes gravitational force, which is a contact force. Force 2 describes
magnetic force, which is a non-contact force.
Force 1 describes gravitational force, which is a contact force. Force 2 describes
magnetic force, which is a contact force.
Force 1 describes gravitational force, which is a non-contact force. Force 2 describes
magnetic force, which is a non-contact force.
Force 1 describes gravitational force, which is a non-contact force. Force 2 describes
magnetic force, which is a contact force.
Answers
Answer: Friction is an important thing in life and we use it to move things or friction is used on us.
Explanation: Friction happens when you rub against something or when someone or something rubs against you.
What rocks make up most of the Earth’s crust? What happens to the temperature as we traveled closer to the center of the Earth?
Answers
A range of energy that cannot be seen by human eyes but has slightly more energy per photon than visible light is known as _______ radiation.
Answers
Answer:
ultraviolet
Explanation:
think of the color with the highest wavelength, then add a prefix
When should you not do if you feel pain while exercising
Answers
Answer:
you should rest or decrease the activity that is causing the problem, ice the painful area
Explanation:
Hope this helps~!
Answer:
Your question is hard to understand, are you asking what you should do?
Explanation:
If so then the answer is to stop doing the exercise. You want to stop immediately because you can cause damage. You can tear a muscle if you keep pushing yourself if you feel pain. (not to be confused with uncomfortableness).
how much energy is needed to raise the temperature of 2kg of copper from 0°c to 10°c. the specific heat capacity of copper is 380j/kg°c
Answers
Explanation:
H= mass× specific heat capacity×change in temperature
=2×380×(10-0)
=2×380×10
=7600Joules
According to the specific heat capacity, 7600 joules of energy is required to raise temperature of 2 kg copper from 0-10 degree Celsius.
What is specific heat capacity?Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.
It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.
It is given by the formula ,
Q=mcΔT
In the given problem,energy is calculated as, Q=2×380×(10-0)=7600 J.
Thus, 7600 joules of energy is required to raise the temperature of 2 kg of copper from 0°C to 10°C.
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If an object falls from rest and lands 3.2 seconds later, how many
meters did it fall
Answers
Answer:
50.2 meters
Explanation:
When an object falls, it goes a distance d in time t according to the formula:
[tex]d=\frac{1}{2}*g*t^{2}[/tex]
d is the distance in meter, g is the acceleration due to gravity with the value of 9.8[tex]m/s^{2}[/tex] , t is the time in seconds
Therefore, [tex]d = \frac{1}{2}*9.8*(3.2)^{2}[/tex]
d= 50.176 ≈ 50.2m
In addition, you can’t see inside the dummy’s skull, but if you could, what would his brain be doing?
Answers
NEED HELP!!! ANSWER THESE 5 QUESTIONS FOR 25 POINTS!!!! PLEASE ANSWER!! I WILL GIVE YOU BRAINEST
1. Why would oxygen levels make a difference in athletic performance?
A.
Muscles need oxygen to function well.
B.
It is just one biometric that is studied.
C.
Oxygen is important for everyone, not just athletes.
D.
Athletes require less oxygen than those who are less active.
2. Dina has been working out for a few weeks. She wants to really focus on developing healthy habits rather than a very specific goal, like losing weight. She knows that tracking can help maintain health. What could she document that would let her see progress?
A.
She should just create a long-term goal.
B.
She could note the lengths and speeds of her morning runs.
C.
She should write down what she weighs when she wakes up in the morning.
D.
She can record what days she exercises and the type of activity.
3. Alonzo thinks that it will be best if he exercises seven days a week since that will make sure that the habit sticks. Is this the BEST way to get into healthy habits that stick?
A.
Yes, the more exercise the better.
B.
No, he needs to plan some days of rest.
C.
Yes, high achievement takes a lot of commitment.
D.
No, he does not have the same schedule every day.
4. Tracking your exercise can help you stick with an exercise routine.
A.
True
B.
False
5. Ezra has a hard time sticking with exercise routines. He does well for a few weeks, but then tends to slack off a bit. What would be the BEST way for Ezra to motivate himself to stay on the program that he creates for himself?
A.
Build in small rewards when he achieves his goals.
B.
Recognize that the next time probably will not work well.
C.
Join an expensive gym so he is more motivated to exercise.
D.
Remind himself of his past failures to motivate him to succeed.
PLEASE NO LINKS!!! IF IT IS NOT THE ANSWER THEN I WILL REPORT
Answers
Answer:
1.A
2.D
3.B
4.A
5.A
Explanation:
Every physical activity requires a specific amount of oxygen for the human organs (heart, lungs, and muscle). Athletes must breathe efficiently to perform at their best, since a high oxygen level reduces fatigue and dizziness and promotes peak performance. Thus option 1. A, 2. D, 3. B, 4. A, 5. A is correct.
What oxygen levels make an in athletic performance?The range of 95-99% represents normal, healthy oxygen saturation levels. And can be simply measured with a fingertip pulse oximeter, a cheap, basic equipment. Your blood oxygen saturation is most likely within the typical range for active, healthy athletes (like you!).
Numerous websites that promote the purported advantages of breathed oxygen can be found by searching for “supplemental oxygen and athletes.” Almost all of them receive funding from businesses that sell oxygen.
Therefore, Because it doesn't function, more oxygen is not regarded as a performance-enhancing substance.
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PLEASE ANSWER NEED HELP!!!!!!!! PLEASE THE CORRECT ANSWER!!!!!!
It is common to struggle to maintain a fitness regime.
A.
True
B.
False
PLEASE NO LINKS
Answers
Answer:
A.true
we struggle to maintain a fitness regime
What is the cost of operating a 40 W light bulb for a year, if the cost of electricity is $0.10 per kWh
Answers
Answer:
$480 a year
Explanation:
Why are comets ice bodies?
A. They originate in areas beyond Neptune.
B. They orbit the sun between Mars and Jupiter.
C. They lose heat as they fall through Earth's atmosphere.
D. They cluster in streams.
Answers
Answer:
The answer is C
Explanation:
the answer is C
An engineer wants to design a go-kart that can reach an acceleration of 20 m/s2
If the cart has a mass of 75 kg and can hold one person with a mass of 80 kg,
the engineer must design an engine that can produce a force of
newtons. *
Answers
This question involves the concepts of Newton's Second Law of Motion, Force, and acceleration.
The engineer must design an engine that can produce a force of "3100 N".
According to Newton's Second Law of Motion:
[tex]F = ma[/tex]
where,
F = Force of engine = ?
m = mass carried by engine = mass of cart + mass of person = 75 kg + 80 kg
m = 155 kg
a = acclereration of the cart = 20 m/s²
Therefore,
[tex]F = (155\ kg)(20\ m/s^2)[/tex]
F = 3100 N = 3.1 KN
Learn more about Newton's Second Law of Motion here:
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The attached picture shows Newton's Second Law of Motion.
You travel 20 miles east in 2
hours. What is your velocity?
Answers
Answer:
10 mph
Explanation:
it just common sense
The force required to accelerate a 0.50kg ball at 50 m/s2 is (Remember F=ma) 25N 25K 50N 250N
Answers
Answer:
25n
Explanation:
I hope this helps:)
50 x 0.50
The force required to accelerate a 0.50 kg ball at 50 m/s² is 25 N.
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
Force = mass*acceleration
Force = 50 x 0.50
Force = 25 N
The force required to accelerate a 0.50 kg ball at 50 m/s² is 25 N.
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The main reason that rods are more sensitive to light than cones is that
A. choices the photopigment of rods is much more sensitive to light than the photopigment used in cones.
B. the eye contains 1000 times as many rods as cones.
C. rods contain greater numbers of photopigment disks in their outer segments the rod is sensitive to a much broader range of wavelengths.
Answers
You carry a 20 kg suitcase upstairs, a distance of 4m. How much work did you do?
Answers
Please find attached photograph for your answer.
Hope it helps.
Do comment if you have any query
Q No. 01
A temperature of 162 oF is equivalent to what temperature in kelvins?
(a) 373 K (b) 288 K (c) 345 K (d) 201 K (e) 308 K
Answers
Answer:
346k
Explanation:
x-273/373-273=y-32/212-32
x-273/100=162-32/180
180(x-273)=13200
x-273=13200/180
x-273=73
x=73+273
x=346k
The ________ smooths out the pressure pulses in the exhaust system, allowing them to be released at an even and constant rate.
Answers
The muffler smooths out the pressure pulses in the exhaust system, allowing them to be released at an even and constant rate.
An exhaust system is a system used by an engine to channel out gasses created when the fuel and air are burned in the combustion chamber.
Some components of an exhaust system include:
clampsoxygen sensor andMufflersThe muffler of the exhaust system helps it to achieve its functions which include it:
control noise, carry away gases, improve engine performance and improve fuel consumptionThe muffler are used mainly to dissipate the loud sounds created by the engine's pistons and valves.
Therefore, muffler smooths out the pressure pulses in the exhaust system, allowing them to be released at an even and constant rate.
Learn more here:
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If you are 13 does that make you a teen i mean im 15 but my sister wants to know by the call me jeffery dahmer
Answers
Answer:
Huh??
I mean, sure??
Answer:
Yes.
Explanation:
12 is considered pre-teen and 13 is considered a teen. Uhh weird question ಠ‿ಠ
Help help help please help
Answers
hii
Explanation:
question: 1 Answer: the second answer
question: what is one importance of sea ice ? answer: "reflecting sunlight back into space, regulating ocean and air temperature, circulating ocean water, and maintaining animal habitats." so either 1 or 3
question: 2 Answer: Species become endangered for two main reasons: loss of habitat and loss of genetic.
2. (i’m not sure abt this one, go off the other persons answer if i had to geuss tho it would be 2?)
3. animals could go extinct bc their habitat is meant to be cold, they are meant for the cold weather but global warming is making the cold spots warm and warm spots even warmer and because the cold spots are becoming gold the animas made for cold might not make it through the warmer weather.
hope this helps:)
Resistance is equal to the potential difference divided by what?
Answers
Answer:
From this, we conclude that; Current equals Voltage divided by Resistance (I=V/R), Resistance equals Voltage divided by Current (R=V/I), and Voltage equals Current times Resistance (V=IR). The important factor here is the temperature.
the displacement in simple harmonic motion is maximum when the
Answers
Answer:
when the velocity is zero
A car with a mass 1235 kg accelerates at 3.82 m/s2. What is the total force exerted by
the car on the road (answer in N to two decimal places)?
Answers
Answer:
4717.70 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question
mass = 1235 kg
acceleration = 3.82 m/s²
We have
force = 1235 × 3.82 = 4717.7
We have the final answer as
4717.70 NHope this helps you
A 4.0 kg dog runs from one end of a 21 kg canoe to the other, a distance of 4.9 m. Assuming negligible water resistance, how far does the canoe move in metres?
Answers
The distance traveled by the canoe in the water is 0.93 m.
The given parameters;
mass of the dog, m = 4.0 kgmass of the canoe, = 21 kgdistance traveled by the dog, d = 4.9 mApply the principle of conservation of linear momentum to determine the distance traveled by the canoe;
[tex]m_1v_1 = m_2 v_2\\\\m_1(\frac{d_1}{t} ) = m_2(\frac{d_2}{t} )\\\\4(4.9) = 21(d_2)\\\\d_2 = \frac{4(4.9)}{21} \\\\d_2 = 0.93 \ m[/tex]
Thus, the distance traveled by the canoe in the water is 0.93 m.
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Some people have proposed a new way to build houses in areas that are likely to experience tsunamis. In this design, a house wouldn’t have solid walls on all four sides. Instead, some of the wall areas would be replaced by substances that water can travel through quickly, as shown in the diagram. How would this design help a house survive a tsunami? What drawbacks might there be to this design?
Answers
This could actually help. By doing this if the house is strong enough the water would go straight through the house just destroying furniture and anything else inside your house. This could also still hurt you the water could miss and still destroy your house so having this would have been a waste of money.
Answer:
It would help, because it would destroy everything inside the house, but not the house itself. Although whatever got ruined in there would have to be payed for, or the wave can miss.
Explanation:
PLEASE ANSWER NEED HELP!!!!!!!! PLEASE THE CORRECT ANSWER!!!!!!
Pauline is hoping to lose weight so she is going to eliminate all fats from her diet and stick strictly to fruits and vegetables. What is the BEST advice for Pauline?
A.
This is a great plan and she should stick to it.
B.
Without fats, she will not have enough energy.
C.
She should include a small amount of fat in her diet.
D.
Since fat boosts the immune system, she will likely get sick.
PLEASE NO LINKS
Answers
Answer:
C
Explanation:
If she wants to lose weight she needs to have a balance diet
Answer:
C
Explanation:
the answer is c because it makes the most sense
If Marin walks 28 m north and 19 m east, what is the magnitude of her displacement from the starting point?
Answers
Answer:
I guess 266
Explanation:
28*19=532
532/2=266
The reader can infer from this passage that Archimedes' screws A. can be used to drill for underground minerals. B. have been replaced by the electric grain elevator. C. were the main reason Rome became a world power. D. can be operated without an electric power source.
Answers
Answer: the answer is D operated without an electric power source.
Explanation: got it right on the test!!
Answer: Answer D,
Can be operated without an electric powder source.
Explanation:
Why does lowering the temperature of an object increase its density
Answers
Answer: Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density.
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