HEELLLPPPPP !
Match the property with the correct type of metal.
Soft
(Alkali Metals)
(Alkaline Earth Metals)
Extremely reactive
1 valence electron
2 valence electrons
Harder, more dense

Answers

Answer 1

Answer: Alkali metals

Soft, Extremely reactive, 1 valence electron

Alkaline earth metals

Harder, more dense, 2 valence electrons

Answer 2

Answer:Alkali metals

Soft, Extremely reactive, 1 valence electron

Alkaline earth metals

Harder, more dense, 2 valence electrons

Explanation:

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Related Questions

With a bar magnet, where are lines of force the closest together?

A) At the tip of either of the magnet's poles

B) At a point outside the magnet halfway between the poles

C) Inside the center of the magnet

Answers

Answer:The lines of force in a magnet is closer together at the ends of a bar magnet.

Explanation:Is equally strong at the north pole when compared with the south pole. The force is weaker in the middle of the magnet and halfway between the pole and the center.

The answer is C. 20 characters

What did you notice about your muscles as you performed the combinations? Were there steps or movements that took more effort? Describe. How do you think your muscles supported your body?   How do you think your muscles worked to help you move?

Answers

Answer:Muscles pull on the joints, allowing us to move. They also help the body do such things as chewing food and then moving it through the digestive system. Even when we sit perfectly still, muscles throughout the body are constantly moving.

Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.

Explanation:

A ball has m=10 kg and v=10 m/s. It has the same momentum as which of the following?

Select one:
a. A ball with m = 100 kg and v = 1 m/s.
b. A ball with m = 5 kg and v = 20 m/s.
c. A ball with m = 2 kg and v = 50 m/s
d. all of these

Answers

Answer:

Choice d. All three balls listed in choice a, b, and c have a momentum of [tex]100\; \rm kg \cdot m \cdot s^{-1}[/tex] each, same as that of the [tex]10\; \rm kg[/tex] ball moving at [tex]10\; \rm m \cdot s^{-1}[/tex]. Assumption: all four balls are moving in the same direction.

Explanation:

The momentum [tex]p[/tex] of an object is equal to the product of its mass [tex]m[/tex] and its velocity [tex]v[/tex].

Momentum of a [tex]10\; \rm kg[/tex] ball moving at [tex]10\; \rm m \cdot s^{-1}[/tex]:

[tex]p = m \cdot v = 10\; \rm kg \times 10\; \rm m \cdot s^{-1} = 100\; \rm kg \cdot m \cdot s^{-1}[/tex].

Similarly:

Momentum of the ball in choice a: [tex]100 \; \rm kg \times 1\; \rm m \cdot s^{-1} = 100\; \rm kg \cdot m\cdot s^{-1}[/tex].Momentum of the ball in choice b: [tex]5 \; \rm kg \times 20\; \rm m \cdot s^{-1} = 100\; \rm kg \cdot m\cdot s^{-1}[/tex].Momentum of the ball in choice c: [tex]2 \; \rm kg \times 50\; \rm m \cdot s^{-1} = 100\; \rm kg \cdot m\cdot s^{-1}[/tex].

Hence the conclusion that these balls have the same momentum.

What does the law of conservation of energy state about energy in a closed system

Answers

Answer:

The total energy in a closed system (a system that isolated from its surroundings)  is always constant.

Explanation:

The law of conservation energy states that:

The total energy in a closed system (a system that isolated from its surroundings)  is always constant.

What this law means is that energy can never be created or destroyed but can only be converted from one form to another form or example the conversion of energy from potential energy to kinetic energy which is seen by a falling object from a height.

ASAP if you answer right I will mark brainiest....

Answers

Answer: *The inner planet that has two moons is Mars * the only planet in the Solar System with clockwise rotation is Venus * The surface of Mercury is covered with ancient magma ( which is similar to the spews of volcanoes on  Earth as well) * The planet that is closest to Earth is Mercury * Venus has more volcanoes than any other planet * Earth's moon formed when a(n)  can sometimes be called the Big Splash or can be called the Theia impact (Luna the moon formed from the ejecta of the collision between the Proto- Earth and Mars sized planet) * Mars is called the red planet because it's soil contains the element iron oxide ( which is the compound that gives blood and rust hue)  

Explanation: Hope this helped :)

A 100 kg bag of sand has a weight on 100 N. When dropped its acceleration is what?

Answers

Answer:

The acceleration of the bag of sand is [tex]1\ m/s^2[/tex].

Explanation:

We have,

Mass of a bag of sand is 100 kg

Weight of the bag of sand is 100 N

It is required to find the acceleration of the bag when it is dropped. The weight of an object is given by :

[tex]F =ma[/tex]

When it is dropped, a = g

[tex]g=\dfrac{F}{m}\\\\g=\dfrac{100}{100}\\\\g=1\ m/s^2[/tex]

So, the acceleration of the bag of sand is [tex]1\ m/s^2[/tex].

Which of the following is NOT an important factor in selecting a medical professional?
A
cost
B accessibility
C. location
D
appearance
Please select the best answer from the choices provided
А
В
C
D

Answers

Answer:

D

Explanation:

appearance is not a imp factor . location could be imp. becoz a proper environment is need to study such courses.

Answer: D. appearance

Explanation:

When the motion energy of an object changes, there is inevitably some other change in energy at the same time. If an object is slowing down, where is the energy going? (Check all that apply)

Question 9 options:

The potential energy could be increasing, like a ball thrown into the air.


The kinetic energy could be lost to friction or air resistance.


The ball could be returning to its natural resting state.


Due to the conservation of energy, the kinetic energy must stay the same.

Answers

Explanation:

This problem bothers on the conservation of mechanical energy

This is the principles in which the energy changes by virtue of the position of the body and when in motion are conserved.

The principle of conservation of mechanical energy  states that "energy can neither be created nor destroyed but can be transformed from one form to another".

Based on the principle of energy conservation the correct options are

The potential energy could be increasing, like a ball thrown into the air.The kinetic energy could be lost to friction or air resistance.The ball could be returning to its natural resting state.

What is the speed of a high-speed electron traveling at right angles to a 0.80-tesla magnetic field with a force of -7.5 x 10^-12 newtons? The charge of an electron is 1.60 x 10^-19

Answers

Explanation:

Answer:

Magnetic field, B = 0.016 Tesla

Explanation:

It is given that,

Velocity of electron, v=9.6\times 10^5\ m/sv=9.6×10

5

m/s

Magnetic force, F=2.6\times 10^{-15}\ NF=2.6×10

−15

N

Charge, q=1.6\times 10^{-19}\ Nq=1.6×10

−19

N

The magnetic force is given by :

F=qvBF=qvB

B=\dfrac{F}{qv}B=

qv

F

B=\dfrac{2.6\times 10^{-15}}{1.6\times 10^{-19}\times 9.6\times 10^5}B=

1.6×10

−19

×9.6×10

5

2.6×10

−15

B=0.016\ TB=0.016 T

So, the magnitude of magnetic field is 0.016 Tesla. Hence, this is the required solution.

Answer:

F = q  v B so v = F/q B

v = -7.5 × 10-12/(-1.60 × 10-19) (0.80) = 5.9 × 107 m/s

Explanation:

Which part of the human eye helps to focus light?

retina

pupil

iris

cornea

Answers

Answer:

lens my guess is iris

Explanation:

The Lens. The lens is composed of transparent, flexible tissue and is located directly behind the iris and the pupil. It is the second part of your eye, after the cornea, that helps to focus light and images on your retina.

The lens does most of the focusing.

The cornea helps too.

Television satellites use infrared waves to transmit. true or false

Answers

Answer: false

Explanation: Because Television satellites use microwaves waves to transmit.

Answer: False

Television satellites don't use infrared waves to transmit.

Identify the magnetic north pole of Earth’s magnet?

Answers

Answer:

using magnets

Explanation:

If we hang a magnet with a rope to an object the north pole of the magnet will point to the Earth's north pole

Which triangle side lengths form a right triangle? Choose all that apply.

A. 5,6,7

B. 6,8,14

C. 8,15,17

D. 10,12,15

E. 15,20,25

F. 16,18,20​

Answers

C and E are right triangles

To figure this out, use the Pythagorean Theorem.

a^2+b^2=c^2

A. 5,6,7

5^2+6^2=7^2
25+36=49
61=49

Not a right triangle

B. 6,8,14

6^2+8^2=14^2
36+64=196
100=196
Not a right triangle

C. 8,15,17

8^2+15^2=17^2
64+225=289
289=289
Right triangle

D. 10,12,15

10^2+12^2=15^2
100+144=225
224=225
Not a right triangle

E. 15,20,25

15^2+20^2=25^2
225+400=625
625=625
Right triangle

What is the kinetic energy of a bicylcle with a mass of 15 kg traveling at a velocity of 3 m/s?​

Answers

KE = 0.5 x mv^2

Kinetic energy equals 1/2 times mass times velocity squared.

Mass = 15kg

Velocity = 3m/s

Plug it into the formula.

KE = 0.5 x 15(3^2)

KE = 0.5 x 15(9)

Multiply the mass and velocity squared.

KE = 0.5 x 135

Then, multiply the result by 1/2 or 0.5

KE = 67.5

The kinetic energy of a bicycle that has a mass of 15kg and travels at 3m/s is 67.5J.

Answer:

67.5 J

Explanation:

Kinetic energy can be found using the following formula.

[tex]KE=\frac{1}{2}mv^2[/tex]

where m is the mass in kilograms and v is the velocity in m/s.

We know the bike has a mass of 15 kilograms. We also know the velocity is 3 m/s. Therefore, we can substitute 15 for m and 3 for v

[tex]KE=\frac{1}{2}*15*3^2[/tex]

Evaluate the exponent first. 3^2 is the same as 3*3, which is equal to 9.

[tex]KE=\frac{1}{2} *15*9[/tex]

Multiply 15 and 9.

[tex]KE=\frac{1}{2} *135[/tex]

Multiply 1/2 and 135

[tex]KE=67.5[/tex]

Add appropriate units. Kinetic energy uses Joules or J as the units.

[tex]KE= 67.5 Joules[/tex]

The kinetic energy of the bike is 67.5 Joules

What is the focal length of a lens if an object placed 3.28 cm from the lens produces an image that is 4.11 cm in front of the lens?

Answers

Answer:

1.82 cm

Explanation:

The relationship between the object distance (p), image distance (q) and focal length (f) is given by [tex]\frac{1}{p}+\frac{1}{q}=\frac{1}{f}[/tex]

According to question,

Object distance (p) = 3.28 cm

Image distance (q) = 4.11 cm

Therefore,

[tex]\frac{1}{3.28}+\frac{1}{4.11}=\frac{1}{f}\\\frac{3.28+4.11}{3.28\times 4.11}=\frac{1}{f}\\f=\frac{3.28\times 4.11}{3.28+4.11}\\=\frac{13.48}{7.39}\\=1.82\,\,cm[/tex]

Which of the following statements concerning the scientific method is true?
Once a scientific law is formed, it cannot be changed.
Scientists must first draw a conclusion about a hypothesis and then find
experiments that always support the conclusion,
Scientists first develop a theory, which becomes à hypothesis if other scientists
want the idea to be tested.
Scientists form a hypothesis before conducting experiments and then the
experiments are used to draw a conclusion.

Answers

Answer:

Scientists form a hypothesis before conducting experiments and then the experiments are used to draw a conclusion.

Explanation:

FALSE: Once a scientific law is formed, it cannot be changed.

We are always willing to change if we find out we are wrong.

FALSE: Scientists must first draw a conclusion about a hypothesis and then find experiments that always support the conclusion,

We must first test our hypothesis through experimentation and base our conclusion on the actual observation.

FALSE: Scientists first develop a theory, which becomes à hypothesis if other scientists want the idea to be tested.

A theory starts as a hypothesis that is tested numerous times and found to be consistently true.

TRUE: Scientists form a hypothesis before conducting experiments and then the experiments are used to draw a conclusion.

True.

what is earths magnetism

Answers

Answer:

Magmatism is the emplacement of magma within and at the surface of the outer layers of a terrestrial planet, which solidifies as igneous rocks. ... On Earth, magma forms by partial melting of silicate rocks either in the mantle, continental or oceanic crust.

Explanation:

Describe the relationship between the direction of the velocity vector and the direction of the acceleration for a body moving in a circle at constant speed.

Answers

Velocity is a vector and has a direction. The direction of an object's velocity is always in the same direction that the object is moving. For an object moving in a circle at constant speed, the velocity vector is always directed in a direction which is tangent to the circle.

What of the following does NOT influence resistance? *
A.thickness of wire
B.temperature
C.material of wire
D.Number of components

Answers

Answer:

D. Number of components

Explanation:

Answer:

D. Number of components

Explanation: hope this helps :)

Determine What is the efficiency of a machine whose work output is 4 joules, and whose work input is 10 joules?

Answers

Answer:

The efficiency of the machine is 40 %.

Explanation:

We have,

Output work by the machine is 4 joules and the input work is 10 joules.

It is required to find the efficiency of a machine. The efficiency of a machine is given by the ratio of output work to the input work. It is given as :

[tex]\eta=\dfrac{4}{10}\times 100\\\\\eta=40\%[/tex]

So, the efficiency of the machine is 40 %.

Which of the following is an inclined plane?
- Stairs
- Wheelchair ramp
- Sloping driveway
- Road going up a mountain

Answers

Explanation:

Wheelchair ramp

An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle, with one end higher than the other, used as an aid for raising or lowering a load.

Road going up a mountain

The brakes on a bicycle apply 95 N of force to the wheels. When the
brakes are applied, the bicycle comes to a stop in 16 m. How much work
are the brakes doing on the wheels?
0 1,500
O 250 m
1,520 J
40 m/s

Answers

Answer:

Work done, W =1520 J

Explanation:

We have,

The brakes on a bicycle apply 95 N of force to the wheels. When the  brakes are applied, the bicycle comes to a stop in 16 m.

It is required to find the work done by the brakes on the wheels. We know that the product of force and displacement is equal to the work done. It is given by :

[tex]W=Fd\\\\W=95\times 16\\\\W=1520\ J[/tex]

So, the work done by the brakes is 1520 J.

The surface of the moon always looks the same because the moon has no:
gravity
weather
running water

Answers

Running water sry if you get it wrong

A force of 310.0 N is used to push a 120 kg mass, 30.0 m horizontally in 3.00 s.
(a) Calculate the work done on the mass.
[ ] × kJ
(b) Calculate the power developed.
[ ] kW​

Answers

Explanation:

We have,

Force acting on the mass is 310 N

Mass, m = 120 kg

Distance covered by the mass is 30 m

Time, t = 3 s

To find,

(a) Work done (b) power developed

Solution,

(a) The work done on the mass is given by the product of force and displacement such that,

[tex]W=Fd\\\\W=310\times 30\\\\W=9300\ J[/tex]

(b) The rate at which the work is done is called power developed. Its formula is given by :

[tex]P=\dfrac{W}{t}\\\\P=\dfrac{9300}{3}\\\\P=3100\ W[/tex]

Therefore, the work done on the mass is 9300 J and the power developed is 3100 W.

An isotope releases radiation in order to ____________ its nucleus.

stabilize

destroy

Answers

Answer:

stabilize

I think this should be the answer...

Answer stabilize

Explanation: hope it’s right

Determining Charge
An element becomes a positively charged ion when it
oloses protons.
loses electrons.
gains electrons
gains neutrons.

Answers

Answer:

hey friend,

an element becomes a positively charged ion when it loses electrons

An element becomes positively charged when it loses electrons.


According to Newton's second law, how are acceleration and mass related? Directly or indirectly when force is constant?

Answers

Answer:

Newton's second law of motion can be formally stated as follows. The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net Force in the same direction as the net force and inversely proportional to the mass of the object  

Explanation:

The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. According to Newton's second law of motion, acceleration is directly proportional to force. As the force increases (when mass is constant), the acceleration increases

Which phrase correctly describes ice?

A) Rigid and having low viscosity
B) Crystalline and having high surface tension
C) Amorphous and having low viscosity
D) Crystalline and rigid

Answers

Answer: D) Crystalline and rigid

Explanation:

Ice is considered to be a rigid mineral. It possesses a regular crystalline structure based on the molecule of water, which consists of a single oxygen atom covalently bonded to two hydrogen atoms, or H–O–H.

Answer: D

Explanation:

When a current flows through a light bulb, it emits 30 J light energy in 2 seconds, What is the power of the bulb?

Answers

I believe the answer is P= 15w

The power of the light bulb is 15 watts.

What is power ?

Power in physics is defined as the rate of energy per unit time or in other words the work done by any electrical appliance per unit time. Power is expressed as -

P = E/T where E is Energy and T is the time period.

How to calculate the value of power in the question ?

Given that the light bulb emits 30 J light energy in 2 seconds.

We have E = 30J and T = 2 seconds.

Therefore power(P) = Energy(E) / Time(T)

∴  P = 30 / 2 = 15 watts

Thus the power of the light bulb is 15 watts.

To learn more about power in physics, refer -

https://brainly.com/question/11569624

#SPJ2

Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).

Answers

Well what’s the question exactly? I think you’ve posted a fact not a question. Can I possibly help you in any other way?

Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).

Based on this information,

 A.

carbon and hydrogen are elements and methane is a compound.

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