The SI unit that is used to measure time is the

Answers

Answer 1

Answer:second

Explanation:

Answer 2

Answer:

The SI unit that is used to measure time is the 'second'.

Explanation:

The International System of Units has defined seven units of measure which are considered as a basic set from which all other SI units can be derived.

Hence, the base unit defined to measure the time is second. It is defined by the oscillations of the radiation which correspond to the transition between two levels of the caesium atom.


Related Questions

What is one advantage of using secondary sources when doing research?​

Answers

Answer:

It saves time and cost nothing than to get the same information that would cost money.

how much power is used to lift a 1.9 kg brick 1.9 in 2.s​

Answers

Answer:

18W

Explanation:

Power=work/time

Work =force x distance

Force = mass x acceleration due to gravity

F=1.9 x 10

F= 19N

W=19 x 1.9

W=36.1J

P=36.1/2

P= 18watts

ANSWER ASAP 50 POINTS
Which of the following illustrates how a Venus fly trap senses that an insect has landed in its open leaves?

1. Using tiny hairs, the leaves sense a change in light.
2. Using tiny hairs, the leaves taste a chemical.
3. Using tiny hairs, the leaves detect a touch.
4. Using tiny hairs, the leaves sense a change in water levels.

Answers

Answer:It turns out the Venus flytrap is a power plant, capable of generating electrical signals. Each trap is actually a modified leaf: a hinged midrib, which would be the central vein of a more familiar leaf, joins the two lobes, which secrete a sweet sap to attract insects.

Explanation:The leaves of Venus' Flytrap open wide and on them are short, stiff hairs called trigger or sensitive hairs. When anything touches these hairs enough to bend them, the two lobes of the leaves snap shut trapping whatever is inside.

Answer:

The answer is #3

Explanation:

if there's a small amount of friction between two surfaces, the result could be _______

select all that apply

A. no movement

B. heat

C. a little bit of movement

D. sliding around

Answers

Answer:A little bit movement

Explanation:

Answer:

all of them

Explanation:

ape x

A wave with a frequency of 500 Hz is traveling at a speed of 100 m/s.what is the wavelength?

Answers

Answer:

0.2m

The solution is in the picture

One benefit of the SI system is that it is ____.

Answers

Answer:

One benefit of the SI system is that it is 'based on multiples of 10'.

Explanation:

One main benefit of the SI system is that it is based on multiples of 10. Which means that conversion to similar units is easier.

For example, you just need to multiply or divide by 10 to change from grams to kilograms and vice versa.

Also, the standard units defined by the International System of Units are consistent around the world which makes it easier to comprehend and communicate using them.

Final answer:

The SI system, or International System of Units, is beneficial because it is a universal and standardized system of measurement used worldwide in scientific domains. This avoid the need for unit conversion and ensures consistency in scientific communication.

Explanation:

One benefit of the SI system, which stands for International System of Units, is that it is universal. This means it is widely used throughout the world in all domains of scientific measurement. It's a standardized system of measurement that uses seven base units, including the meter for length, the kilogram for mass, and the second for time, among others.

This makes it easier for scientists, researchers, and students alike to understand and communicate data without needing to convert units. Its universality and consistency make it a fundamentally important tool in many fields including physics, engineering, and chemistry.

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Q: The acceleration of gravity means that for each second that passes, falling objects move 9.8m? A:True

Answers

Answer: false

Explanation:

Answer:

False

Explanation:

If the object covers 9.8 m every second then it has a constant velocity of 9.8 m/s

The acceleration implies that there is a change in velocity. With a constant acceleration the velocity will change linearly.

[tex]S = ut + \frac{1}{2} gt^2[/tex]

The distance traveled each second will not be a constant, it will be a quadratic function as mentioned above.

A magnetic field applies forces on:
a)static charges
b)moving charges
c)water flow​

Answers

Answer:

moving charges b)

I think this is the answer

Answer:

It is moving charges.

Which team sport utilizes judges to determine the points earned? Football Hockey Rhythmic Gymnastics Soccer

Answers

Answer:

Rhythmic Gymnastics

Explanation:

In general, the judges in the sports tend to be in charge for correcting and controlling the breaking of the rules in the particular sport. They are allowed to punish the competitors in accordance with the breaking of the rule, or they are there in order to determine weather a point is regular or not. In the rhythmic gymnastics though, and sports similar to it, the judges have different role, as they are in charge of determining the points earned by the competitors. This is done in a manner where every judge gives certain amount of points, or grades, and when those are summed up, the competitors get their total points.

AL(OH)2 is__
an acid
a base
a salt

Answers

It is a base because of the presence of hydroxide

The beta decay of a radioactive isotope results in the conversion of a neutron into a proton and an electron. Assume that scientists have discovered that a new element is formed. Which of the following would best support our understanding that the proton defines an element’s identity?
Question 3 options:

The atomic number decreases by one.


The atomic number increases by one.


The mass number increases by one.


The mass number decreases by one.

Answers

The atomic number increases by one.

EXPLANATION: Let’s look at carbon-14 it’s a radioactive isotope and goes under beta decay and turns into nitrogen-14 which has an atomic number of 7.

Diamond will scratch quartz. True or False

Answers

false
hope this helps

Answer:true, diamonds will scratch quartz.

Explanation: diamonds have a more compact composition. That is what makes them so hard. Quartz composition is not that compact, so diamond can scratch it.

an object is acted upon by a force of 22 Newtons to the right and 13 Newtons to the left what is the magnitude and direction of the net force ​

Answers

22N to the right and 13N to the left

Forces are in opposite directions so you subtract the bigger force from the smaller force

Magnitude of force= 22N -13N

= 9N

net force direction is to the right

According to Newton’s first law of motion, which force is expected to cause a body to accelerate?

Answers

Answer:

Unbalanced force is expected to cause a body to accelerate.

Explanation:

What is the electric potential at a point in space if a charge of 7.3 × 10-17 coulombs at that point has a potential energy of 6.4 × 10-17 joules?

Answers

Answer:

0.88 volts

Explanation:

We are given the amount of charge of a point ( 7.3 × 10^-17 ) along with its potential energy ( 6.4 × 10^-17 joules ).

We are to find the electrical potential at this point.

To find this, we will use the following formula:

[tex]V = \frac{Ep}{q}[/tex]

Substituting the given values in the above formula:

[tex]V = \frac{Ep}{q}V = \frac{6.4 * 10^{-17}\:J}{7.3 * 10^{-17}\:C}[/tex]

V = 0.88 volts

Answer:

V= 1.32 V

Explanation:

Electrical potential energy is calculated using the equation

Ue=1/2CV² where C is the charge and V the voltage at that point in space.

Making V the subject of the formula;

V= √( 2Ue /C)

V= √(2×6.4×10⁻¹⁷÷(7.3 × 10⁻¹⁷))

= 1.32 V

Select the correct answer.
Anna will wear a black dress when she attends het cousin's wedding. Which color(s) does the dress absorb?
A.
all colors
B. no colors
C. red and green
D. white

Answers

Answer:

A: all colors, because black is the absence of color.

Explanation:

Answer:

The answer is option  A

Explanation:

Hope it helps

A scientific law tells us what nature will do under certain conditions.
True
False

Answers

Hello There!

This Is A "True" Statement.

A scientific law tells us what nature will do under certain conditions.

a measure of how consistently a result is determined by repeated evaluations is called

Answers

Answer:

The answer is precision.

Answer:

Precision

Explanation:

Accuracy is the measure of how close to the actual value a reading is. Precision refers to the degree of closeness the values are to each other while taking a reading.

For example, if a manufacturer says the length of the table is 50 cm, then if you measure it you should also get 50 cm reading, this shows the reading is accurate. If the reading of the table is taken multiple times then if the values are suppose 49.9, 49.94 etc, then the reading is precise.

A localized impediment to electron flow in a circuit is a:

resistor
source of emf
conduit
conductor

Answers

This would be the definition of a resistor. These components inhibit or “resist” the flow of a current.

Hope this helps!
I think by the definition which was very helpful is a resistor

A student measured the density of gold to be 19.1 g/cm^3. The accepted value of the density of gold is 19.3 g/cm^3. What is the percent error of the student's measurement?

A. 0.20%
B. 1.71%
C. 1.04%
D. 1.39%

Answers

Answer:

C. 1.04%

Explanation:

The following information has been provided;

Actual density of gold; 19.3 g/cm^3

Observed/measured density of gold; 19.1 g/cm^3

The formula for percent error is given as;

((actual value - observed value)/actual value)) * 100

[tex]\frac{19.3-19.1}{19.3}*100=1.0363[/tex]

The percent error of the student's measurement is thus 1.04%

Final answer:

The percent error of the student's measurement is 1.04%.

Explanation:

The percent error of the student's measurement can be calculated using the formula:

Percent error = |(measured value - accepted value) / accepted value| * 100%

In this case, the student measured the density of gold to be 19.1 g/cm^3, while the accepted value is 19.3 g/cm^3. Plugging these values into the formula, we get:

Percent error = |(19.1 - 19.3) / 19.3| * 100% = 0.104 * 100% = 1.04%

Therefore, the percent error of the student's measurement is 1.04% (option C).

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In your own words, describe the purpose of using a chemical equation.

Answers

Chemical equations show how chemicals interact when a reaction occurs. They use symbols and formulas to show the chemical reaction so that chemical names do not need to be written out. They also help keep track of all elements and the number of atoms of each element on each side of the equation.

Answer:

The purpose of using a chemical reaction is to diagram a reaction, where the left side is formed by reactants and the right side is formed by the product. Through diagraming a reaction, chemists can hypothetically change parts of the both components, that way they would see what to expect in the reaction. Also, they can measure the approximation of amount of mass they would need, and see how components will change after the reaction

If you drive 12 miles north and 35 miles east, what is the direct distance between you and your starting point?

Answers

Answer:

For this, you need the pythagorean theorem, which is a^{2}+ b^{2}= c^{2}

Your a should be 12, and your b should be 35. So now you can solve for c, which equals 37 miles.

So the answer is 37 miles

when a sound's intensity increases by a factor of 10, its decibel reading increases by how many decibels?​

Answers

Answer:

If sound intensity increases by a factor of 10, the decibel reading increases by 10.

Explanation:

Decibel scale:

In order to express levels of sound meaningfully in numbers that are more manageable, a logarithmic scale is used, rather than a linear one. This scale is the decibel scale. every increase of 3 dB represents a doubling of sound intensity.

Increase in decibel scale is given by the formula:

n = 10*log(Increased Intensity of sound/Original Intensity of Sound

n = 10*log(I/I₀)

In our case the sound intensity increases by a factor of 10. So I/I₀ increased by 10 times and will be 10 I/I₀

n = 10*log(10 I/I₀)

n = 10*log(10) + 10log(I/I₀)

n = 10 + 10*log(I/I₀)

This shows that the decibel reading is increased by 10 points.

Answer:

10

Explanation:

Which transfers heat from one object to another without transferring matter?

A. conduction

B. insulation

C. thermal expansion

Answers

Answer:

A. Conduction

Explanation:

Heat is transferred from one object to another but does not involve the movement of particles between the two objects. The only condition for this to happen is for the objects to be in contact. Contact ensures that adjacent particles transmit energy between them. It is measured in watts per meter per kelvin W/mK

 

Insulation prevents transfer of heat.

Thermal expansion is one effect of transfer of heat.

Conduction is one of the three ways to transfer heat, and one of the two ways to do it without transferring matter. (A)

Carbon can only form ionic compounds

Answers

Answer:

The answer is true.

Explanation:

How Antman can breathe when his size is smaller then oxygen molecules?​

Answers

Antman is fictional. However, in the case we were hypothetically assuming it was possible, he is the size of an ant which is not smaller than an oxygen molecule. When he goes into the quantum realm, he exists between the elemental particles (oxygen) and must use his mask to breathe.

A projectile is launched horizontally from a height of 8.0 m. The projectile travels 6.5 m before hitting the ground.

The velocity of the projectile the moment it was launched, rounded to the nearest hundredth, is

Answers

Answer:

5.09 m/s

Explanation:

Use the height to find the time it takes to land:

y = y₀ + v₀ᵧ t + ½ gt²

0 = 8.0 m + (0 m/s) t + ½ (-9.8 m/s²) t²

t = 1.28 s

Now use the horizontal distance to find the initial velocity.

x = x₀ + v₀ₓ t + ½ at²

6.5 m = 0 m + v₀ (1.28 s) + ½ (0 m/s²) (1.28 s)²

v₀ = 5.09 m/s

The velocity of the projectile the moment it was launched, rounded to the nearest hundredth would be 5.09 m/s.

What is a projectile motion?

It can be defined as the motion of any object or body when thrown from the earth's surface and follows any curved path under the effect of the gravitational force of the earth.

As given in the problem, a projectile is launched horizontally from a height of 8.0 m. The projectile travels 6.5 m before hitting the ground.

y = y + v ×t + 1/2 × gt²

0 = 8.0 + v t + 1/2 × -9.8 × t²

t = 1.28 s

x = x + v t + 1/2 at²

6.5 m = v 1.28  + 1/2 × 1.28²

v = 5.09 m/s

Thus, the velocity of the projectile the moment it was launched, rounded to the nearest hundredth, is 5.09 m/s.

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What happens to light waves from a star as the star moves toward Earth?

Answers

This shifts the star’s spectral lines toward the blue end of the spectrum. If the star is moving away from us, it’s waves are effectively stretched out when they reach earth, increasing their wavelength. This shifts the star’s spectral lines toward the red end of the spectrum.

What mistake did Carl make?
Carl makes the table below to determine the number of
atoms of each element in the chemical formula 4Ca(CIO3)2.
Element Calculation
Calcium 1x4
Chlorine 1 x 2
Oxygen 3 x 2
Total atoms
4
2
6
He did not multiply the calcium atoms by the subscript 2.
He did not add the coefficient 4 to the chlorine and oxygen
atoms.
He did not add the subscript 2 to the calcium atoms.
He did not multiply the chlorine and oxygen atoms by the
coefficient 4.

Answers

Answer:

He did not multiply the chlorine and oxygen atoms by the coefficient 4

Explanation:

Answer:

The correct answer is:

'He did not multiply the chlorine and oxygen atoms by the  coefficient 4'.

Explanation:

Number of atoms in [tex]4 Ca(ClO_3)_2[/tex]

The 4 in front of molecular formula of calcium chlorate is its coefficient . it tells us about the molecules or moles of compound.

Number of calcium in 1 molecule of calcium chlorate = 1

Calcium atoms in 4 molecule of calcium chlorate = 1 × 4 = 4

Number of calcium in 1 molecule of calcium chlorate = 2

Chlorine atoms in 4 molecule of calcium chlorate = 2 × 4 = 8

Number of oxygen in 1 molecule of calcium chlorate = 3 × 2 = 6

Oxygen atoms in 4 molecule of calcium chlorate = 6 × 4 = 24

So, number of atoms of different elements calculated by Carl was wrong as he didn't multiplied the coefficient 4 with chlorine and oxygen atoms.

true or false static is weightless colorless and odorless​

Answers

Answer:

True.

Explanation:

Other Questions
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