1.What do you call the rate of doing work?
A. Energy
B. Time
C.Power
D. Work

2.What is the unit of power?
A. Joule
C. Newton
B. Second
D. Watt

3.How much power is required to lift a 30ON chair, as high as 0.20 in 2s?
A.1 W
C. 3 W
B. 7W
D. 15 W

4.How much power is required to raise a 30 kg crate with a vertical distance of 6m in a time of 4
Seconds?
A. 45 WV
C 52.5 W
B. 385 W
D. 441 W

5. A job is done slowly, and an iden tical job is done quickly. Both jobs require the same amount of_______
but different amounts of_________
A. energYy, work
B. work, energy
Choose the correct two words respectively.
C. power, work
D. work, power

6.What is work?
A. Force muitiplied by time
C. Force multiplied by distance
B. Force per unit of time
D. Force divided by distance

7.What is the unit of work?
A Joule
B. Second
C. Newton
D. Watt

8.Power can be increased by______
A. decreasing the force applied by an object.
B. decreasing the work done on the object
C.inereasing the time in which the work is done.
D. decreasing the time in which the work is done.



Please help​

Answers

Answer 1

Answer:

1. c

2. d

3. c

4. d

5.

6. a

7. a

8.


Related Questions

An element is lustrous, brittle, and silver colored. What type of element is it
Metal
Metalloid
Non Metal
Other
Will give brainlist

Answers

Metal, since some metals can be brittle

is a granite a mineral or a rock

Answers

mineral because its not a rock

Answer:

Rock

Step-by-step explanation:

It's an igneous rock

I hope this helps!

i need help please help me now please

Answers

The answer is C, balanced

What is the precise volume of the liquid

Answers

Your pic is bad works mam,or sir!

Pleaseee helpppp this is thermal energy in 6th rade and i need it quick for a formal assesment!!!!!!

Answers

Answer:The answer is B my child

Explanation:

Which of the following compounds is the MOST polar?

H−Br

H−F

H−Cl

H−I

Answers

H-F because it has the largest difference in electronegativity which is 2, so it’s the most polar.

Find the number of moles of iron atoms obtain
from 320kg of iron (3) oxide​

Answers

Answer:

320 kg  of iron(III) oxide contain 4007.76 moles of iron atom.

Explanation:

Given data:

Mass of iron(III) oxide = 320 kg (320000 g)

Number of moles of iron atoms = ?

Solution:

First of all we will calculate the number of moles of iron(III) oxide.

Number of moles = mass/molar mass

Number of moles = 320000 g/ 159.69 g/mol

Number of moles = 2003.88 mol

1 mole of Fe₂O₃ contain 2 moles of iron atom.

2003.88 moles of  Fe₂O₃ contain,

2003.88 ×2 = 4007.76 moles of iron atom.

A sample is left on the desk over several hours. On examination, the crystals appear moist, andliquid is forming around them. The compound is classified as:

a. Stableb.
b. Deliquescent
c. Efflorescentd.
d. Hygroscopic

Answers

Answer:

c. Efflorescent

Explanation:

Some hydrated salts, when exposed to the atmosphere, give off part of all of their water of crystallization spontaneously to form a lower dehydrated or anhydrous salt. Such salts are known as efflorescent and the phenomenon is called Efflorescence.

Efflorescence occurs when the hydrate's aqueous vapor pressure is greater than the water vapor's partial pressure in the air. For example, because the vapor pressures of washing soda (Na2CO3·10H2O) and Glauber's salt (Na2SO4·10H2O) normally exceed that of the water vapor in the atmosphere, these salts effloresce (i.e., lose all or part of their water of hydration), and their surfaces assume a powdery appearance.

5) A pure substance which can be decomposed by a chemical change is a

A) mixture
B) compound
C) metal
D) nonmetal

Answers

it’s b compound sksjdhshkaks
The answer would be (B), a compound. By definition, a chemical compound is a substance that is made up of at least two atoms from more than one element. A chemical change involves a change in chemical identity: In decomposition, a substance with its unique chemical identity is broken down into constituent substances that have their own, unique chemical identities.

Where is the north pole of the bar magnet, based on the magnetic field lines
shown?

Answers

Answer:On the Right End

Explanation: Trust me I just got it wrong on APEX to answer it for y’all On the right end is the correct answer

Answer:

Right end

Explanation:

Just did the quiz

A element is having atomic number 82. find the number of its protons and electrons

Answers

Answer:

The number of its protons and electrons are 82 each

Explanation:

Atomic no of an element = 82

Atomic no = No of protons

⇒ No of protons = 82

Electrons are negatively charged particle and Protons are positively charged particles.

No of electrons = 82

Hence, the element is Lead with 82 protons and electrons

In Natural selection, individuals whose unique characteristics are well-suited for an environment tend to survive and produce more offspring. true or false?

Answers

Answer: True

Explanation:

Describe the function of a cilia.

Answers

Answer:

hope it helps..

Explanation:

'Motile' (or moving) cilia are found in the lungs, respiratory tract and middle ear. ... These cilia have a rhythmic waving or beating motion. They work, for instance, to keep the airways clear of mucus and dirt, allowing us to breathe easily and without irritation.

Answer: to keep airway clear of mucus and dirt allowing us to breathe easy

Explanation:

in an experiment it was found that the total charge on an oil
drop was 5.93 X 10^-18 C How many negative charges does
the drop contain? (#51)

Answers

Answer:

37 negative charges.

Explanation:

We're being asked to determine how many negative charges a drop contains from an oil drop experiment where the total charge was 5.93x10-18 C. The drop contains 37 negative charges.

It was stated and identified that we are to attempt question #51 alone.

From the given information;

The total charge on an oil drop = 5.93 × 10⁻¹⁸ C

According to Oil drop experiment carried out by Robert Milliken in (1910);

In the oil drop laboratory experiment, It was possible for Him to substitute oil for water (because water quickly evaporate). Robert Milikan adjusted the electrical voltage among the two metal plates while the oil drop continues to drop until it stopped. When the drop was stopped, the gravitational downward force on the oil drop was equivalent to the electrical upward force on the charges thereby enabling Robert Millikan to be able to estimate the electrical charge drop.

Robert Milliken identified that the magnitude of a single negative electron charge is:

= 1.6 × 10⁻¹⁹ C

If in an experiment, the total charge =  5.93 × 10⁻¹⁸ C

Then;

The number of negative charges in the oil drop can be calculated as;

[tex]\mathbf{=\dfrac{5.93 \times 10^{-18}}{1.6 \times 10^{-19}}}[/tex]

= 37.063 negative charges

Therefore, we can conclude that the numbers of negative charges contained in the total drop = 37.063.

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30 POINTS
Why would a scientist revise a model? (choose the best answer)
Group of answer choices

to cover up evidence from a previous experiment

to show off to other scientists

to add unnecessary details to the model

in order to better explain what is happening during a phenomenon

When modeling it is important to (pick two)
Group of answer choices

show beginning, middle and end if it fits the phenomenon

only use one color

make sure there is only drawings and nothing written

use zoom in bubbles to show the unobservable

Which of the following is NOT a limitation of a model
Group of answer choices

inaccurate colors

the type of material used to create the model

a messy model

shapes that are an approximation

Answers

Answer:

First Question: in order to better explain what is happening during a phenomenon

Second Question: show beginning, middle and end if it fits the phenomenon; use zoom in bubbles to show the unobservable

Third Question: the type of material used to create the model

Explanation:

First Question: You would not revise a model to "cover up evidence," that's scientifically immoral and should not be done, and showing off to other scientists is not the point of revising something.

Second Question: You should use more than one color to differentiate different parts of the model, but don't overwhelm it with color. There should be some labels in the model, so some writing is necessary.

Third Question: Inaccurate color representation does not technically limit a model unless color scheme is important, so this could be an answer, but not likely. A messy model limits a model because it makes it hard to read. Approximating shapes is a limitation because it portrays an incorrect representation of what system the model is of. The type of material used to create the model is most likely the right answer.

Answer the following questions in the space provided.
1. Classify each of the following as a homogeneous or heterogeneous substance.
a. iron ore
b. quartz
c. granite
d. energy drink
e. oil-and-vinegar salad dressing
f. salt
g. rainwater
h. nitrogen
2. Classify each of the following as a physical or chemical change.
a. ice melting
b. paper burning
c. metal rusting
d. gas pressure increasing
e. liquid evaporating
f. food digesting
3. Compare a physical change with a chemical change.

Answers

Answer: iron ore is heter

quartz homo

granite heter

energy drink homo

oil-and vingar salad dressing heter

salt homo

rainwater homo

nitrogen homo

ice melting chemical

burning paper chemical change

1. A camper named Bob ran into aliens on a trail. Bob made friends with the aliens so he could
steal their treasure of 1 zygot.
1 zygot = 3 trigots
3 trigots = 2 bigots
4 bigots = 1 gram gold
How many grams of gold did Bob take from the aliens?

Answers

Answer : The number of grams of gold Bob take from the aliens will be 0.5.

Explanation :

As we are given that:

1 zygot = 3 trigots

3 trigots = 2 bigots

4 bigots = 1 gram gold

Now we have to determine the number of grams of gold Bob take from the aliens.

The number of grams of gold Bob take from the aliens will be equal to:

[tex]\frac{1\text{ zygot}}{1}\times \frac{3\text{ trigots }}{1\text{ zygot}}\times \frac{2\text{ bigots }}{3\text{ trigots }}\times \frac{2\text{ gram gold}}{4\text{ bigots }}[/tex]

= [tex]\frac{6}{12}[/tex] gram gold

= [tex]\frac{1}{2}[/tex] gram gold

=  0.5 gram gold

Hence, the number of grams of gold Bob take from the aliens will be 0.5.

Which is not a compound?
a. carbon dioxide gas
b. oxygen gas
c. silicone dioxide
d. water

Answers

Answer:

The answer is b oxygen gas b/c its an element

Explanation:

The combination of two or more atoms, from the same or different elements, creates a(n).
a. element
c. molecule
b. atom
d. mixture
Please select the best answer from the choices provided
Pls help!!!! Fast!!!
B
С
D

Answers

It’s makes a molecule

Answer:

c Molecule

Explanation:

cuz science

Identify the placement of items A-E using the drop-down menus.


A)
⇒No
⇒Yes

B)
⇒No
⇒Yes, when liquid or solution
⇒Yes, when solid

C)
⇒No
⇒Yes

D)
⇒No
⇒Yes

E)
⇒No
⇒Yes

Answers

Answer:

A=no

B= yes when liquid or solution

C=yes

D=no

E=yes

Explanation:

According to the given table, the placement of items A-E are

A) ⇒ No

B) ⇒Yes, when liquid or solution

C) ⇒Yes

D) ⇒No

E) ⇒Yes

What is conductivity and Malleability?

Malleability - Those metals that can be beaten into thin sheets with a hammer or any heavy object. For example - Cu, Au etc

Conductivity - Conductivity is the measure of the ease at which an electric charge or heat can pass through a material. For example - Metals are good conductors of heat and electrolytic solution is conductors of electricity.

Therefore, according to the given table, the placement of items A-E are

A) ⇒ No

B) ⇒Yes, when liquid or solution

C) ⇒Yes

D) ⇒No

E) ⇒Yes

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what is the name of CH3CH2CH2C(O)CH2CH3

Answers

Answer:

1-methoxypropane

Explanation:

Living things help contribute to the water cycle.
A. true
B.false

Answers

A. hahwjwkwjwbwnkwwk
Answer: A

Living things are apart of the cycle

Which of the following substances will dissolve in water? Check all that apply.
Magnesium Sulfate
Methane
Butane
Sodium nitrate​

Answers

Answer:

The answers are A. and D.

According to the concept of solubility and properties of ionic compounds, magnesium sulfate and sodium nitrate dissolve in water.

What is solubility?

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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the gram formula mass of NH4Br is what (please provide explanation, thank you)​

Answers

Answer:

97.95 g/mol

Explanation:

Step 1: Define molar masses

Molar Mass of N - 14.01 g/mol

Molar Mass of H - 1.01 g/mol

Molar Mass of Br - 79.90 g/mol

Step 2: Find amounts of molar masses

1 mol N - 14.01 g/mol

4 mol H - 4.04 g/mol

1 mol Br - 79.90 g/mol

Step 3: Find molar mass of compound

Molar Mass N + 4 Molar Mass H + 1 Molar Mass Br

14.01 g/mol + 4.04 g/mol + 79.90 g/mol

97.95 g/mol

Match each term with its definition.

a. The position of an equilibrium always shifts in such a direction as to relieve a stress applied to the system.
b. A molecule that donates a proton when it encounters a proton acceptor.
c. Occurs when a reaction involving an acid and its conjugate base is combined with a second reaction involving a base and its conjugate acid.
d. It ionizes completely when dissolved in water.
e. The shift in the position of equilibrium caused by the addition of a participating ion.
f. It only partially ionizes when dissolved in water.
g. It is capable of acting as either an acid or a base depending upon the solute.
h. The act of self-ionization of a solvent to produce both a conjugate acid and a conjugate base.
i. A chemical species that bears both positive and negative charges.


1. Week electrolyte
2. Bronsted-Lowry acid
3. Neutralization
4. Amphoteric solvent
5. Zwitterion
6. Auto-protolysis
7. Strong acid
8. Le Chåtelier's principle
9. Common effect

Answers

Answer:

The position of an equilibrium always shifts in such a direction as to relieve a stress applied to the system -Le Chåtelier's principle

A molecule that donates a proton when it encounters a proton acceptor.- Bronsted-Lowry acid

Occurs when a reaction involving an acid and its conjugate base is combined with a second reaction involving a base and its conjugate acid.- Neutralization

It ionizes completely when dissolved in water.- Strong acid

The shift in the position of equilibrium caused by the addition of a participating ion.- Common ion effect

It only partially ionizes when dissolved in water.- Weak electrolyte

It is capable of acting as either an acid or a base depending upon the solute- Amphoteric solvent

The act of self-ionization of a solvent to produce both a conjugate acid and a conjugate base.- Auto-protolysis

A chemical species that bears both positive and negative charges.- Zwitterion

Explanation:

In the answer box we have various chemical terminologies and their definitions. In answering the question, you must carefully read through each definition, then check what option best matches that definition from the options provided.

Each definition applies only to one terminology as you can see in the answer above.

If you've ever shifted realities, How long did it take you?

Answers

Answer:

2 days.

Explanation:

radium 226 has a half life of 1600 yers. suppose we have a 300g sample. how much remains after 200 years

Answers

Answer:

[tex]A=275.1g[/tex]

Explanation:

Hello.

In this case, since the radioactive decay is computed via:

[tex]A=A_0*2^{-\frac{t}{t_{1/2}}[/tex]

For the initial amount of Ra-226 (300 g), once 200 years have passed, the remaining mass is:

[tex]A=300g*2^{-\frac{200years}{1600years}}\\\\A=275.1g[/tex]

This is, considering that the half-life is 1600 years, it means that the mass of Ra-226 is decreased.

Best regards.

Which organism on the geologic time scale are now extict

Answers

Answer:The Ordovician and Cambrian Periods are referred to as the "age of invertebrates", with trilobites abundant. In this period, brachiopods became more abundant that the trilobites, but all but one species of them are extinct today.

Explanation:

Please helpppp!!!!!! It's 6th-grade thermal energy science.

Answers

Answer:

b?

Explanation:

The answer is C: Radiant energy from the sun travels through the glass, is absorbed by the black pot, and reflected by the aluminum foil.

which statement describes how technology has increased our information on Mars?
A. The Curiosity rover found sulfur compound in rocks.
B.The Curiosity rover located methane in soil samples.
C. The Curiosity rover detected carbon in organic molecules.
D. The Curiosity rover discovered helium in underground pockets.

Answers

Answer:

Either D or C. I'm so sorry if I got you the wrong answer

Answer:

c

Explanation:

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