Calculate the weight(force of gravity) of a 10 kg child.
A. 10 N
B. 98 kg
C. 10 kg
D. 98 N

Answers

Answer 1
I'm not positive but i think it is C.
 
It is asking for the weight of the child, and the statement gives it to you, 10 kg.
Answer 2

The weight(force of gravity) of the child is: D. 98 Newton.

Given the following data:

Mass of child = 10 kg

We know that the acceleration due to gravity (a) of an object on planet Earth is equal to 9.8 meter per seconds square.

To calculate the weight(force of gravity) of the child:

Mathematically, the weight(force of gravity) of an object or body is calculated by using the following formula;

[tex]Weight = mg[/tex]

Where:

m represents the mass of an object. g is the acceleration due to gravity.

Substituting the given parameters into the formula, we have;

[tex]Weight = 10[/tex] × [tex]9.8[/tex]

Weight(force of gravity) = 98 Newton

Therefore, the weight(force of gravity) of the child is 98 Newton.

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Related Questions

I'm in 7th grade and I need help with 1.04 law of conservation of energy can someone please help me today

Answers

Final answer:

The law of conservation of energy states that the total energy in a system remains constant. Energy can be transferred from one system to another or change form, but the total amount of energy remains the same.

Explanation:

The law of conservation of energy states that the total energy in a system remains constant. Energy can be transferred from one system to another or change form, but the total amount of energy remains the same. For example, when a ball is raised to a certain height, it gains potential energy. As the ball falls, the potential energy is converted to kinetic energy. The sum of the potential and kinetic energy remains constant throughout the process.

If enough heat was REMOVED from B, it would change into ____________.


A.) a gas

B.) plasma

C.) a liquid

D.) a solid

Answers

Answer:

D

Explanation:

If you take heat away from a liquid it would turn into a solid, therefor being D a solid

Hope this helps  :)

an isolated system allows which of the following to enter or exit
a. neither energy nor matter
b. energy but not matter
c.matter and energy
d.matter but not energy

Answers

I think it's A but not 100% sure though.

Answer:

Neither energy nor matter

Explanation:

A system is defined as the part of the universe. In thermodynamics, systems are of three types i.e.

1. Open System : In an open system, both energy and matter can freely exchange with surrounding. For example- boiling water in an open pan transfers both energy and matter.

2. Closed system : In a closed system, only energy is exchanged with the surrounding. For example- boiling water with a lid on the pan exchanges only energy with the surrounding.

3. Isolated system : In an isolated system, neither energy nor matter exchanges with the surrounding. For example : a thermos flask does not exchange energy and matter with the surrounding.

Hence, the correct option is (a) " neither energy nor matter ".

Which of these is a pure substance?

a. diamond

b. salt

c. ocean water



a


a and b


b and c


all of them

Answers

it would be diamond and salt

Answer:

The correct answers are A and B. Diamond and salt are pure substances.

Explanation:

A pure substance is one whose composition does not vary, even if the physical conditions in which it is found change. For example, water has a formula that is H2O and is always the same, which indicates that it is made up of molecules in which there are 2 hydrogen atoms and 1 oxygen atom. If I changed that formula, it would be another different substance.

A pure substance cannot be broken down into other simpler substances using physical methods.

A pure substance has its own or defined characteristic properties.

Suppose the half-life of an element is 10 years. How many half-lives will it take before only about 6% of the original sample remains?

Answers

You don't need to worry about the 10 year bit with this question. Just grab a calculator and divide 100/2, then the answer to that (50) by 2 etc and keep dividing by 2 until you get down to 6.25.

The answer ends up being 4 half lives :)

If you don't understand what a half life is please let me know :)

Answer:

40.59 years

Explanation:

Use the decay law of radioactivity

[tex]N = N_{0}e^{-\lambda t}[/tex]

Where, λ is the decay constant

λ = 0.6931 / T

where, T is the half life

λ = 0.6931 / 10 = 0.06931 per year

So, N = 6% of N0

[tex]0.06 = e^{-0.06931\times t}[/tex]

By solving we get

t = 40.59 years

A hooked weight is suspended by two wires. The gravitational force acting on the weight is 1.0N,downward. Is it possible for the two wires to exert forces that have magnitude of 0.60 N and 0.70 N on the hooked weight?

Answers

Search Google to find answet
Final answer:

The tension in the wires must be equal to the weight of the hooked weight for it to be in equilibrium, so it is not possible for the two wires to exert forces with magnitudes of 0.60 N and 0.70 N on the hooked weight.

Explanation:

The tension in the wires must be equal to the weight of the hooked weight for it to be in equilibrium. Since the gravitational force acting on the weight is 1.0 N downward, the sum of the magnitudes of the tensions on the two wires must also be 1.0 N to cancel out the gravitational force. Therefore, it is not possible for the two wires to exert forces with magnitudes of 0.60 N and 0.70 N on the hooked weight.

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explain the purpose of pumping while running through a half pipe

Answers

The purpose of pumping is to increase overall velocity. The person drops down into a crouch while traversing the more-or-less flat bottom of the U-shaped pipe or bowl. Then, as he enters the sloped part of the ramp or bowl, called the transition, he straightens his legs and rises up. By raising his center of mass just at the beginning of the arc, the person gains energy and thereby increases his speed.

How many positions coordinates are required to identify the position of a system undergoing one dimensional motion and what symbols should you use to identify a systems position in one dimensional motion

Answers

A one-dimensional motion can be plotted in a Cartesian plane. The Cartesian plane was first discovered by Rene Descartes. This is composed of four quadrants produced by the two intersecting axes, the x and y.

(1) Hence, the motion can be described using two directions, x and y. 

(2) The symbol that should be used for the identification is (x, y). 

An eagle carrying a trout flies above a lake along a horizontal path. The eagle drops the trout from a height of 6.1 m. The fish travels 7.9 m horizontally before hitting the water.

What is the velocity of the eagle? Round your answer to the nearest tenth.

Answers

The answer is 7.1 I just took the test

Answer:

Explanation:

We can use one of the SUVAT equations like:

[tex]s = ut + \frac{1}{2} a^{2}[/tex]

where s = displacement, u = initial velocity, a = the acceleration and t = time.

To get the velocity of the eagle, we have to look at motion of the fish first, using the SUVAT equation form above, therefore:  

Vertical motion, which is going downwards

displacement = 6.1 m

Initial velocity = 0 m/s ,

acceleration = 9.8 [tex]m/s^{2}[/tex]

So, we need to find the time.

[tex]6.1 = 0t + \frac{1}{2} 9.8t^{2}\\6.1 = 4.9t^{2} \\t^{2}= \frac{6.1}{4.9}\\t = \sqrt{1.2448}\\t = 1.116 s[/tex]

Now with the time, we can look at the horizontal motion of the fish, where the variable of the initial velocity, u, is what we need to find, which is also the velocity of the eagle:

Acceleration = 0 [tex]m/s^{2}[/tex]

Displacement = 7.9 m ,

time = 1.116 seconds we need to find Initial velocity (u).

[tex]7.9 = v*1.116 + \frac{1}{2} 0*1.116^{2}\\7.9 = 1.116v \\v= \frac{7.9}{1.116} \\ v= 7.1 m/s[/tex]

       

Therefore, velocity of the eagle = 7.1 m/s

is the gravity of the sun and moon pull earth's surface in the same direction neap or spring

Answers

Spring tide. Neap tide is when the moon from the side.
The answer is spring

a sprinter's whose mass is 70 kg accelerstes from rest to 11 m/s in 6 seconds what is the acceleration what force did this require

Answers

Final answer:

The acceleration of the sprinter is approximately 1.83 m/s², and the force required to accelerate the sprinter is approximately 128.1 N.

Explanation:

The acceleration of a sprinter can be calculated using the formula:

acceleration = (final velocity - initial velocity) / time

Given that the sprinter's mass is 70 kg, the final velocity is 11 m/s, and the time taken is 6 seconds, we can substitute these values into the formula:

acceleration = (11 m/s - 0 m/s) / 6 s = 11 m/s / 6 s ≈ 1.83 m/s²

The force required to accelerate the sprinter can be determined using Newton's second law of motion:

force = mass x acceleration

Substituting the mass (70 kg) and acceleration (1.83 m/s²) into the formula:

force = 70 kg x 1.83 m/s² ≈ 128.1 N

Difference between angle of shear and angle of twist.

Answers

Answer:  

The angle of shear can be defined as the angle of the deformation that occurs on the sides when the object is exerted upon by shearing stress or deformation force.

The angle  of twist can be defined as the angle through which the rotating machine element rotates or twists with respect to its free end. The angle of twist exists because of the torque.

The baking soda looked like it dissolved in the vinegar. Sarah and Connor watched as the balloon expanded and filled with a gas. Was this a physical or chemical reaction and why? A) chemical - gas produced B) physical - water bottle got hot C) physical - baking soda dissolved D) chemical - baking soda disappeared

Answers

I think the answer is A- Chemical gas produced 

Answer: A) chemical - gas produced

Explanation: Physical change is a process in which there is no change in chemical composition of the substance.

Chemical change is a process in which there is a change in chemical composition of the substance.

Chemical process is accompanied by following changes

1. Change in color

2. Absorption or release of energy

3. Production of gas

4. Formation of precipitates.

Thus a chemical reaction is happening on mixing baking soda [tex](NaHCO_3)[/tex] and vinegar [tex](CH_3COOH)[/tex], there is production of [tex]CO_2[/tex] which expanded the balloon.

[tex]NaHCO_3+CH_3COOH\rightarrow CH_3COONa +CO_2(g)+H_2O[/tex]


Will something with the density of 31 sink or float?

Answers

The answer to your question is float

What is the kinetic energy of a 2 kg snowball thrown through the air at 5 m/s?

Answers

Kinetic energy = 1/2mv^2 so, 1/2(2) is 1 square 5 to get 25 and multiply that by 1 and the kinetic energy is 25. 1/2(2)(5)^2

Answer:

Kinetic energy of the ball is 25 joules.

Explanation:

Mass of the snowball, m = 2 kg

Speed of the ball, v = 5 m/s

Let E is the kinetic energy of the snowball. The energy possessed due to the motion of an object is called its kinetic energy. Mathematically, it is given by :

[tex]E=\dfrac{1}{2}mv^2[/tex]

[tex]E=\dfrac{1}{2}\times 2\times 5^2[/tex]

E = 25 joules

So, the kinetic energy of ball is 25 joules. Hence, this is the required solution.

In object of mass 30 kg is in freefall in a vacuum where there is no air resistance determine the acceleration of the object

Answers

The free fall acceleration due to the Earth's gravity will always be 9.8m/s^2. So, if this question is taking place on Earth, then the acceleration of an object in free fall is 9.8m/^2.

Scientists in different parts of the world repeat an experiment several times and get the same result. Which of these is the most likely reason why experiments are repeated to produce the same result?
to make results non-testable
to make results non-observable
to make conclusions elaborate
to make conclusions reliable

Answers

The correct answer would be D) To make conclusions reliable.

Scientists in different parts of the world repeat an experiment several times and get the same result to make conclusions reliable is the most likely reason why experiments are repeated to produce the same result, therefore the correct answer is option D

what is the scientific claim?

Scientific claims are statements made in science based on an experiment.

These Scientific claims are backed by the experimental data and their true results obtained from scientific investigation and experimentation.

A repeated experiment should provide the same outcomes when carried out by several individuals at various periods and preferably, but not always, under comparable circumstances. Consistent experiments must be conducted by renowned scientists who are unrelated to the claimant. 

Thus, The most likely explanation for why experiments are repeated to produce the same result is that scientists around the world do so in order to draw reliable conclusions. As a result, option D is the best response.

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A city planner needs to verify that Main Street and Oak Street are parallel. If ___________ are supplementary, the streets must be parallel. A) ∠1 and ∠2 B) ∠1 and ∠3 C) ∠2 and ∠3 D) ∠2 and ∠4

Answers

the answer is a trust me i did it on usa test prep.

Answer;

A) ∠1 and ∠2

Explanation;

Supplementary angles form a straight line and have a sum of 180 degrees. Supplementary angles do not have to be congruent or adjacent. Angle 1 and angle 2 are supplementary angles.

Complementary angles on the other hand are two angles whose sum is 90 degrees. Supplementary and complementary angles do not have to be adjacent (sharing a vertex and side, or next to), but they can be. angles sum right angle.

A mathematical equation that predicts how a physical phenomenon will behave

Answers

The correct answer would be Scientific Law.

Final answer:

A mathematical equation predicting physical phenomena is a scientific law, which includes formulas like the Law of Conservation of Energy. Mathematical models and dimensional analysis also play roles in understanding and predicting physical systems.

Explanation:

A mathematical equation that predicts how a physical phenomenon will behave is often referred to as a scientific law. These laws are descriptions, frequently formulated mathematically, which represent the outcomes of repeated experiments or observations within a specific context. For instance, the Law of Conservation of Energy, which is a fundamental concept in physics, can be summarized by a mathematical equation that is crucial for understanding energy transfer and transformation in a closed system.

In the context of physics and engineering, mathematical models are instrumental in outlining physical phenomena using mathematical frameworks like equations and inequalities. Dimensional analysis is one method that utilizes basic principles of dimensions and can help in qualitatively understanding physical systems and predicting quantitative responses to changes in parameters, even with limited detailed knowledge of the system.

John Watson’s experiments with Baby Albert showed how classical conditioning could be used to explain?

Answers

The experiment showed how classical conditioning could be used to explain STIMULUS GENERALIZATION.
John Watson used a 9 months old baby to show that a subject can be conditioned to fear an object which he did not fear before. Albert was a baby who does not fear anything: cat, rat, rabbit, flurry objects, etc, but he does not like loud noise. Albert was allowed to play with white rat, which he did not show any fear for. But during the course of the experiment, anytime the baby touch the rat, Watson used bell to make loud noise. Because of this, the baby become afraid of the rat and started running away from it. To show stimulus generalization, the baby also started running away from all other objects [cat, rabbit, flurry objects, etc] which he did not fear before. Thus the fear he developed for the rat was extended to other objects.
Final answer:

John Watson's demonstration of classical conditioning with Baby Albert involved pairing a loud noise (UCS) with a white rat (CS) to elicit a fear response (CR) in Albert, which later generalized to similar furry objects.

Explanation:John Watson and Classical Conditioning

John Watson's experiments with Baby Albert are classic demonstrations of classical conditioning. Watson and his graduate student, Rosalie Rayner, used this method to show how a neutral stimulus, when paired with an unconditioned stimulus, can evoke a conditioned response. In the case of Little Albert, the unconditioned stimulus (UCS) was the loud noise, and the unconditioned response (UCR) was fear from the noise. The conditioned stimulus (CS) became the white rat after it was repeatedly paired with the loud noise. Soon, the mere presence of the white rat evoked the conditioned response (CR), which was fear. Later, stimulus generalization occurred when Little Albert started to fear similar furry objects.

Summarize the main ideas of Dalton’s atomic theory

Answers

Dalton's Atomic Theory had several main points, which are variously grouped into five statements : 1) All matter is made of atoms. 2) Atoms of a given element are identical in size, mass and chemical properties. 3) Atoms of different elements have different masses and properties.
Final answer:

Dalton's atomic theory states that matter is made up of atoms, which are indivisible. These atoms are identical within an element and different across elements. They combine in specific proportions to form compounds and in chemical reactions, they are rearranged but not created or destroyed.

Explanation:

John Dalton’s atomic theory includes several primary ideas. The first is that all matter is composed of atoms, which are small, indivisible particles. Secondly, atoms of the same element are identical to each other in terms of mass and properties, while atoms of different elements are different. Thirdly, atoms combine in specific proportions to form compounds. Lastly, in chemical reactions, atoms are rearranged but they are not created, destroyed or changed into atoms of another element.

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Conduction is the movement of heat energy because of the collision of...
A. The collision of molecules

B. The repulsion of molecules away from each other

C. Cold inside of large molecules

D. Energy of molecules breaking down

Answers

The answer is A because when the two molecules combine they make a force which is conduction obviously

We have that from the Question"Conduction is the movement of heat energy because of the collision of" it can be said that

Conduction is the movement of heat energy because of the collision of  of molecules

The collision of molecules Option A

From the Question we are told

Conduction is the movement of heat energy because of the collision of...

A. The collision of molecules

B. The repulsion of molecules away from each other

C. Cold inside of large molecules

D. Energy of molecules breaking down

Generally

molecules  collide with each  the at high kinetic energy and this exercise of molecule causes heat as a phenomenon to occur

Therefore

Conduction is the movement of heat energy because of the collision of  of molecules

The collision of molecules Option A

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~Dissolved oxygen is required by all aquatic life.
~Chlorophyll, a plant pigment, is measured to indicate the amount of algae in the water.
~Nitrogen and phosphorous are nutrients that can contribute to undesirable levels of algae.
~Benthic invertebrates, animals that live on the bottom of water bodies, are an important source of food for fish, shrimp and crabs.
Georgia's overall coastal habitats were rated and the results can be seen in the bar graph. Benthic organisms are an important link in an aquatic food chain. What is the expected correlation between the benthic index and chlorophyll a?
A) There is no correlation between benthic organisms and chlorophyll a. One group is plant-based; the other is animal-based.
B) There is a direct correlation between algae present and benthic organisms. The more algae, the more benthic invertebrates.
C) As benthic organisms decrease we would expect chlorophyll a to also decrease. There is a direct relationship between the two in the graph.
D) As chlorophyll a increases, we would expect dissolved oxygen to decrease and because benthic organisms are animals, they too would decrease.

Answers

D) As chlorophyll a increases, we would expect dissolved oxygen to decrease and because Benthic organisms are animals, they too would decrease.

The answer is D. As chlorophyll a increases, we would expect dissolved oxygen to decrease and because benthic organisms are animals, they too would decrease.

How do microwaves cook food or heat water?

Answers

Microwave ovens are so quick and efficient because they channel heat energy directly to the molecules (tiny particles) inside food. Microwaves heat food like the sun heats your face—by radiation. A microwave is much like the electromagnetic waves that zap through the air from TV and radio transmitters
Final answer:

Microwaves in an oven heat food by causing water molecules to align and transfer energy to the thermal motion of the water.

Explanation:

Microwaves in an oven are produced electronically by accelerating electrons. The oscillating electric field of the microwaves inside the oven exerts a torque on water molecules in food, causing them to heat up. The water molecules have a dipole moment, which means they have separated centers of equal and opposite charges. The microwaves cause the water molecules to align in one direction and then in the other, transferring energy to the thermal motion of the water and heating the food.

So i am doing a science fair project and its about earthquakes so im going to need different supports for my buildings. I found springs but now i need 3 more. URGENT!!

Answers

You could use clay, sticks, rocks, Legos,

what is the speed of a 2.5-kilogram mass after ot has fallen freely from rest through a distance of 12 meters? a) 4.8 m/s b) 15 m/s c) 30. m/s d) 43 m/s

Answers

Vf^2 = Vi^2 + 2ad
Vf^ = 0 + 2(-9.8)(-12)
Vf^2 = 235.2
Vf = 15.3 m/s 

The correct answer is b) 15 m/s 

v₀ = initial velocity of the mass = 0 m/s                (since the mass falls from rest)

a = acceleration = acceleration due to gravity = 9.8 m/s²

d = vertical distance traveled = 12 m

v = final velocity of the mass

Using the kinematics equation

v² = v₀² + 2 a d

v² = 0² + 2 (9.8) (12)

v² = 235.2

v = √235.2

v = 15 m/s

hence the speed of mass comes out to be

b) 15 m/s

You rub a balloon on your head and it becomes negatively charged. The balloon will be MOST attracted to A) a piece of metal. B) positively charged hair. C) the neutrally charged wall. D) another negatively charged balloon.

Answers

I believe the correct answer is B.positively charged hair.

It will be attracted most to your positively charged hair. This is why it will make it stand on end. Unlike charges attract, like charges repel.

Objects in free fall are weightless.
True or False

Answers

True because a free falling object is an object that is falling under the sole influence of gravity. Any object that is being acted upon only by the force of gravity is said to be in a state of free fall. Free-falling objects do not encounter air resistance.

Redshift means stars and galaxies are emitting a color that is shifting toward the red end of the color spectrum. this indicates the light's wavelengths are _____ and less frequent, and the star or galaxy is____?

Answers

Increasing ; moving away

This indicates the light's wavelengths are (increasing) and the star or galaxy is (moving away.)

Answer:

Redshift means stars and galaxies are emitting a color that is shifting toward the red end of the color spectrum. this indicates the light's wavelengths are MORE and less frequent, and the star or galaxy is MOVING AWAY

Explanation:

As we know that by Doppeler's effect of light when source is moving away from the observer then the frequency observed by the observer is given as

[tex]\frac{\Delta \nu}{\nu} = \frac{v}{c}[/tex]

so here on moving away the frequency observed by observer will decrease and hence we can say that the wavelength of light must be increased

So here on increasing the observed wavelength we say it to be shifted towards higher side which means it is red shift

so here correct answer would be

Redshift means stars and galaxies are emitting a color that is shifting toward the red end of the color spectrum. this indicates the light's wavelengths are MORE and less frequent, and the star or galaxy is MOVING AWAY

Answer the question below based on the periodic table entry for silicon. What is the atomic mass? 2 14 28 28.08

Answers

false lies forgive me Based on the periodic table entry for silicon, the atomic mass of silicon is 28.08.


Answer;

28.08

Explanation;The atomic mass of a given element is the sum of the masses of its isotopes, each multiplied by its natural abundance. Isotopes are atoms of the same element with the same atomic number but different mass number. Atomic number on the other hand is the number of protons in the nucleus of an atom.Silicon is an element in group 4 in the periodic table, it has an atomic mass of 28.08. It has an atomic number 14, which means it has 14 protons in the nucleus of its atom, and thus it has 14 electrons in the energy levels, and therefore, its electronic configuration is; 2:8:4.
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