Which is a valid velocity reading for an object?
A.45 m/s
B. 45 m/s north
C. 0 m/s south
D. 0 m/s

Answers

Answer 1
The answer is B. You cannot have 0 velocity. If you don’t include direction, then it is only considered speed.
Answer 2

The valid option would be 45 m/s north. This option specifies a velocity of 45 meters per second in the north direction. It includes both the magnitude (45 m/s) and the direction (north) of the velocity. Hence the correct option is (A).

A. 45 m/s: This indicates a velocity of 45 meters per second without specifying the direction. It represents the magnitude of the velocity but does not indicate a particular direction.

B. 45 m/s north: This indicates a velocity of 45 meters per second in the north direction. It specifies both the magnitude (45 m/s) and the direction (north).

C. 0 m/s south: This indicates a velocity of 0 meters per second in the south direction. No velocity. It specifies both the magnitude (0 m/s) and the direction (south).

D. 0 m/s: This indicates a velocity of 0 meters per second, meaning the object is not moving. It represents zero speed and zero direction.

The correct option is (A).

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Related Questions

Is this true of false
Apples and Onions taste the same if you plug your nose?

Answers

I think yes because you won’t be able to smell
When bit into without the onion's outermost skin, apples and onions share an extremely similar crunch. ... The flavors of the apple neutralize the onions pungency. So there you have it, if you plug your nose, close your eyes and bite into an onion...it is indistinguishable from an apple... until your nostrils open again.

Describe the units used to measure mass and volume.

Answers

Answer:

Mass measures the amount of matter in a substance or an object. The basic SI unit for mass is the kilogram (kg). Volume measures the amount of space that a substance or an object takes up. The basic SI unit for volume is the cubic meter (m3)

Ummm I forgot how to do this

Amy weighs 35 kg and her dad weighs 85 kg. They are roller skating. Amy challenges her dad to race. They stand poised at the starting line. Her dad yells, “Go!” Who will go faster and why?

Answers

Answer:

Amy because she was less than her dad and due to the dads weight being more it'll add friction to the skates which will slow him down.

Explanation:

Answer:

Amy will win because she ways less than her dad.

Explanation:

Examples of positive effects of fluid forces


note: and pls I don't want the definition

Answers

Answer:

slider,topspin,hook,curveballs

Ride a bike, curve ball

Which boxes represent pure substances?

Answer Choices

A and D

A, B and D

All of these

D only

Answers

A, B and D can I have Brainlyest thx
D only because the rest are all compounds and even though for c they are not connected they are still included to be compounded

The equation shows a chemical reaction using 64 grams of calcium, 162 grams of zinc carbonate, and 152 grams of calcium carbonate.

calcium + zinc carbonate → calcium carbonate + zinc

According to the law of conservation of matter, how much zinc is present in the product?
Group of answer choices

74 grams

98 grams

88 grams

64 grams

Answers

98 grams I think so
It’s 74 grams
162-152=10
64+10=74
So 74 grams is the answer

PLS HELP! I WILL GIVE BRAINLIEST TO FIRST ANSWER

The distance versus time graph for Object A and Object B are shown. (3 points)


Which statement best describes the motion of Object A and Object B?

Both objects move with variable speed.
Both objects move with constant speed.
Object A moves with constant speed and Object B moves with variable speed.
Object A moves with variable speed and Object B moves with constant speed.

Answers

Answer:

Explanation:

Object A moves with variable speed and Object B moves with constant speed.

The distance they have gone with hours

Claim 2: Firing the thrusters only slowed the pod, it didn’t stop; the pod hit the space station, which made it bounce and move in the opposite direction. This would happen if.

Answers

The force exerted by the thrusters caused the pod to change direction. It depends on the direction and the strength of the force exerted.

Energy Transfer and Temperature Quick Check
4 of 4Items





Item 4
Use the table to answer the question.

Sample Temperature (ºC)
L 40
M 88
N 21
The table shows the temperature of three water samples. Which list shows the samples in order from greatest to least average kinetic energy of the water molecules?

(1 point)

L, M, N

N, L, M

M, L, N

N, M, L

Answers

I think it would be M, L, N!! Hope this helps!!

can u plzz help meee

Answers

The answer is
h: sB and Sb
hd : sb
hr : SB
The answer is h:sb and sb
Hd:sb
Hr:sb

What forces hold the planets and the moon together?

Answers

Answer:

Gravity

Explanation:

Because there this is lot of mass there is a force pulling mass to it, that is gravity.

Gravity!

The Sun's gravity pulls the planets in orbit around it, and some planets pull moons in orbit around them. Even spacecraft are in motion through the solar system, either in orbit around the Earth or Moon, or traveling to further worlds, because of gravitational forces.

12 POINTS PLUS MARKF BRAINILEST

Answers

Answer:

gas

Explanation:

Gas because gases more freely and faster than solids and liquids do

A force of 1000 pounds drags a truck 50 feet in 10 seconds.

How much work is accomplished?

How much power was required?

Work = 50, 000 ft-lbs, Power = 5000 ft-lbs/sec
Work = 50,000 ft-lbs, Power = 500 ft-lbs/sec
Work = 5,000 ft-lbs, Power = 500 ft-lbs/sec

Answers

Answer:

The first one (Work = 160,000 Nm, Power = 160, 000 Nm/sec)

Explanation:

hope this helps :)

A force of 1000 pounds drags a truck 50 feet in 10 seconds. then the work accomplished is 50000 lbs feet and the power required was 5000ft-lbs/sec.

What is Force ?

Force is responsible for the motion of an object. it produces acceleration in the body. According to newton's second law force is mass times acceleration i.e. F =ma. Its SI unit is N which is equivalent to kg.m/s². There are two types of forces, balanced force and unbalanced force. Balanced forces are those forces which are opposite in direction and equal in magnitude. When Net force acting on a body is zero then we call it as balanced force. Balanced force is not responsible for the motion of the body. ex. when two persons pulling rope on both end with equal magnitude which cause them to be balanced force have 0 net force. Unbalanced forces are those when resultant of all the forces is not equal to zero is called as unbalanced force. unbalanced force is responsible for the motion of the body.

Given,

F = 1000 pound

s = 50 feet

t = 10 s

Work = F.s = 1000 * 50 = 50000 lbs feet

Power = Work/time = 50000/10 = 5000ft-lbs/sec

Hence option A is correct.

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What best explains the source of light energy and heat energy produced by a star?

A. Dense metals, such as iron, explode in the core of a star.
B. Explosions from a nearby supernova provide fuel to the star.
C. Nuclear reactions involving the fusion of atoms occur in the core of a star.
D. High-energy radiation from nearby stars penetrate the core of a star.

Answers

C nuclear reactions involving the fusion of atoms occur in the core of a stars

Answer:

C

Explanation:

What is true about the force acting on the cars at the end of a roller coaster ride as they slow down right before stopping?

Answers

That the gravity dosent Change

The cars will slow down as a result of unbalanced forces and negative acceleration.

What is Inertia?

Inertia is the ability of an object to continue its current motion until and unless some external force causes its speed or direction to change. Inertia is described in the Newton's first law of Motion.

The cars are slowed due to negative acceleration of the object eventually to a stop, because of these unbalanced forces due to friction which are acting on them. The riders, which have inertia, are also acted on by the unbalanced forces throughout the ride causing them to change their state of motion.

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the spreading out of waves after passing through a small opening. What is the word to this definition? HELP!!

Answers

Answer:diffraction

Explanation:

Answer:

Refelction

Explanation:

look it up that is what it says

5.0 start thanks and plx do brainly

PLEASE. A 20 kg box is being pulled across a floor by a horizontal rope. The tension in the rope is 99 Newtons. The coefficient of friction is 0.25. What is the force of friction on the box? What is the acceleration of the box?

Answers

Answer:

Force of Friction = -50 (N)

Acceleration = 2.45 (m/s^2)

Explanation:

Force of Friction = f = N * coefficient of friction

N = m * g

=> Force of Friction = m * g * coefficient of friction

f = 20 * 10 * -0.25 = -50 (N)

------------------------------------------------------

(1) F net = F + f

(2) F = m * a

(1) F net = 99 - 50 = 49

(2) a = 49 / 20 = 2.45 (m/s^2)

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PLEASE HELP IM TIMED!! THIS IS SCIENCE!! WILL MARK BRAINLIEST 13 POINTS

Which statement best explains how galaxies are held together?

A. Thermal energy generated by stars holds galaxies together
B. Magnetic forces among the components of galaxies holds galaxies together
C. Electrical energy generated by planets holds galaxies together
D. Gravitational forces among stars and other components of galaxies holds galaxies together

Answers

Answer:

D

Explanation:

Gravity pulls objects together

Answer: D

Explanation: Gravity holds things in place. Therefore the answer is gravity. Also, without gravity there would be nothing to hold planets in place which would make it to where there are no galaxies.
Hope this helps!:)

Help please! i dont understand

Answers

1. Mass no.= protons+ neutrons,
Therefore, mass no. of sodium = 11 + 12 = 23

2. Total no. of electrons in a neutral sodium atom (has not reacted with anything, thus has not lost any electrons, thus is neutral) = Atomic no. = electron no. = 11

3. So as mass no. of magnesium is 24, and mass no. = protons+neutrons, and no. of protons is 12, then no. of neutrons= atomic no. - protons = 24-12= 12

4. Atomic no. = no. Of electrons= 13

5. Mass no. = protons+neutrons= 31
No. Of neutrons=16
Therefore, no. Of protons= Mass no. - neutrons= 31-16=15
Also- no. Of protons=no. Of electrons= 15 (another way to solve)

How do you think the weather and climate might change in the area around Mt. Everest?

Answers

Answer:

It does change if the weather is bad then very soon the climate will turn bad when the climate is unfavourable then the sourrounding will be affected. For example if the area around the Mt. Everest is Hot & Humind the ice would start melting & it would lead to way more issues.

If a horse is running at a speed of 35 m/s when it's rider pulls up on the reigns. After 5 seconds the horse slows down to a pace of 15 m/s. What is the horse's rate of acceleration?

Answers

The answer is simply 5.51

The acceleration of the horse's speed which is running at a speed of 35 m/s when it's rider pulls up on the reigns will be -4 m/s².

What is Acceleration?

Acceleration can be defined as the rate of change of velocity with respect to time. Acceleration is a vector quantity as it has both the magnitude and direction. The SI unit of acceleration is m/s² or ms⁻².

The expression for acceleration will be:

a = (v-u)/ t

v = 15m/s,

u = 35m/s,

t = 5 sec,

a = (15-35)/ 5

a = -20/ 5

a = -4 m/s²

Therefore, there will a negative acceleration of 4 meters per second square.

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Summarize what you learned this week about the electromagnetic spectrum



HINT: What is it? What does it organize? How do we use these EM waves in our lives?

Answers

Answer:

I only really know the "How do we use these EM waves in our lives?" part srry

Explanation:

EM waves are used to make sure you cellphone, radio, TV, and etc. have service/ connection.

Electromagnetic spectrum consists of
Radio waves
Microwaves
Infrared
Visible light
Ultraviolet
X-ray
Gamma ray

We use these everyday in our life however they also have dangers.

Radio waves - their long wavelength allows them to help with communication
Danger - exposure to a lot of radio waves can cause cancer or leukaemia

Microwaves - used for heating up food and transferring heat to the food.
Dangers - exposure can cause cancers and other diseases.

Infrared - can be used for remote controls and security cameras.
Danger - can cause damage to the cornea in your eye

Visible light - used for photography and optical fibres.
Danger - intense sources can cause permanent or temporary damage to the eyesight.

Ultraviolet - can be used to sterilise food and sterilise surgical equipment.
Danger - can cause skin damage and may lead to a cancer.

X-rays - used to see the internal structure of tissues and bones.
Dangers - can lead to mutations and May damage the cells

Gamma- can be used to sterilise food and surgical equipment and kill microorganisms and other bacteria.
Dangers - May reach your cells and cause cancer and cell mutations which could result in mutations.

The sleigh is being pulled with a force of 800N and has a mass of 200 Kg.
What is the acceleration in m/s/s?

Answers

The answer is 4 m/s/s

Answer:

a = 4m/s²

Explanation:

Given:

F = 800N

m = 200 kg

Unknown:

acceleration or a

Formula and solution:

a = F/m

a = 800 kg.m/s² ÷ 200 kg

Final Answer:

a = 4 m/s²

in the solution there's a two same unit and that is kg so the same unit will be cancelled and the rest is going to aapply in the answer that is 4 so if combine it the final answer is 4 m/s²

Match the parts of an atom to the colors in this picture:

Protons

Electrons

Neutrons

Answers

Yellow - Electrons
Red - Protons
Green - Neutrons

Answer:

The yellow circles are electrons.

The green circles neutrons

The red circles are protons.

A 20 kg box is being pulled across a floor by a horizontal rope. The tension in the rope is 99 Newtons. The coefficient of friction is 0.25. What is the force of friction on the box? What is the acceleration of the box?

Answers

Answer:

friction = 49 N, a = 2.5 m/s/s

Explanation:

big brain

Yeah what that guy said lol

HELP FAST ONLY CORRECT ANSWERS 15 PT

Research the Moon to understand why only one side of the Moon is observable from Earth. If this was the case with the Earth-Sun system, what would be Earth’s period of rotation?

Answers

Answer:

We only see one side of the moon due to the synchronous rotations and the earth rotation ration is approximately 27 days

Explanation:

Can someone tell me the answer to this?

Answers

Answer:

A

Explanation:

Answer:

A

Explanation:

In the word "hydroelectricity," which of the following does the prefix "hydro-" relate to? Choose the best answer.

Answers

what are the choices? hydro relates to water, power, and furnishing water

We didn't get any answer options but here's my answer anyways...

Hydro power is electrical energy produced through the power of moving water. Power obtained from the (typically gravitational) movement of water., Hydropower plants derive energy from the force of moving water and harness this energy for useful purposes...

Hope is helped!

What are the 4 things you can do to change the strength of an electromagnet.

Answers

Answer:

1. wrapping the coil around a piece of iron (such as an iron nail)

2. adding more turns to the coil.

3. increasing the current flowing through the coil.

4. turn it off

Explanation: I really hope it helps

Adding more turns into oil is one

1 The drop of food coloring spreads slowly.
2 The drop of food coloring spreads very quickly.
A student places a drop of food coloring into two water samples. Her observations are shown in the table. Which statement best explains the observations in the table?

(1 point)

The water molecules of sample 1 are transferring more kinetic energy.

The water molecules of sample 1 are moving faster.

The temperature of sample 2 is close to freezing.

The temperature of sample 2 is higher.

Answers

Answer: The water Molecules of sample 1 are moving faster

Explanation:

The temperature of the sample in which the color spreads quickly is higher than sample 1. Hence, statement d is correct.

What is kinetic energy?

Kinetic energy of a substance is the energy generated by virtue of its motion. It is dependent on the mass and velocity of the substance. Temperature of the system also affects the kinetic energy of substance.

According to kinetic theory of matter, as thermal energy increases, kinetic energy of the particles also increases leading to more effective collisions results in reactions.

Here, the color spreads more easily in sample 2 because the higher temperature of the solution provide enough thermal energy for the liquid particles to gain kinetic energy to easily move through the solution. Thus, statement d is correct.

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Other Questions
At a concessan stand l hot dog and one hamburger cost $4.One hotdog and5Hamburgers cost $13Find the cost of one hot dog and the cost of one hamburger ? All of the following are forms of cognitive bias except:_____.A. Confirmation bias: This bias occurs when decision makers seek out evidence that confirms their previously held beliefs, while discounting or diminishing the impact of evidence in support of differing conclusions. B. Anchoring: This is the overreliance on an initial single piece of information or experience to make subsequent judgments. Once an anchor is set, other judgments are made by adjusting away from that anchor, which can limit ones ability to accurately interpret new, potentially relevant information. C. Shifting: This is the bias involved in shifting perspectives too rapidly, thereby forgoing objectivity and sound reasoning. D. Halo effect: This is an observers overall impression of a person, company, brand, or product, and it influences the observers feelings and thoughts about that entitys overall character or properties. It is the perception, for example, that if someone does well in a certain area, then they will automatically perform well at something else regardless of whether those tasks are related. E. Overconfidence bias: This bias occurs when a person overestimates the reliability of their judgments. This can include the certainty one feels in her own ability, performance, level of control, or chance of success. The process oftakes place when the Earth's surface is worn away by the action of physicalprocesses such as wind and water.A. erosionB. plate tectonicsC. climateD weather living things making new living things like themselves like these bacteriaO homeostasisO cellO growthO reproduction The density of cadmium is 8.65 g/mL, what is the volume of a 33.4 g object made of pure cadmium? Patrick doesn't think he is very good at math, because he has seen how his peers already know how to do division, and he is stillstruggling with multiplication. Which theory explains this?Socialization theoryThe self-serving biasSocial comparison theoryThe theory of the looking glass self answer 7 and 8 please!!! Which of the following is a principle of design?ColorLineValueMovement Read this excerpt from a travel brochure.Do you love history? Then book a vacation to the beautiful city of London, England! London is one of the worlds oldest and most historic sites. In London, visitors can see the Tower of London, Big Ben, and Kensington Palace. The British Museum is a fascinating place to spend a day or two. Many local shops and restaurants have been around for hundreds of years. A visit to London is like a trip back in time!How does the writing shape the reader's impression?The writing style is formal and informs the reader about many unknown historical facts.The writing style is persuasive and convinces the reader to visit historical London.The writing style is informal and entertains the reader with humorous travel stories.The writing style is scientific and gives the reader a scholarly understanding of London. Which of the following is a practice that shows you have intellectual honesty?A. letting your beliefs influence your resultsB. avoiding plagiarism of the works of othersC. making up data to support a special causeD. copying the work of other scientists and claiming it as your own Sammi had 19 marbles and bob gave him 1/7 of his marbles now Sammi has 27 how many marbles did bob have originally? pls help help with this please TIMED TEST!!The product side of a chemical reaction is shown. 7Ti2(SO4)3 What number is the coefficient Due today HELP PLEASEEEEE!!! Help me three questions please really easy I promise answer Put the equation in the correct order Describe a circumstance where you want friction to work against Newtons First Law. Check all of the boxes that are true about the proton:it is outside the nucleusit has a positive chargeit has no massit has a negative chargeit is inside the nucleusit is the same as the atomic numberit is the same as the number of neutrons75% of the isotopes have a mass Write an equation of the line passing through point P(4,3) that is parallel to the line y = 12(x+4). (-45) + (+3) =A -42B -40C 40