Answer:
Newton law of inertia.
Explanation:
Newton first law states that if any object is in the motion or is in the state of rest then it will remain in that state till the external force is applied on that object. Inertia is the main reason of having seat belts and air bags in the car.
In this case, when seat belt trapped into the passenger than passenger experience same state of motion as car has.
When the car experience any kind of the collision then the car will stop abruptly. In this case seat belt and air bag will help in stopping the motion of passenger in the forward direction.
Therefore Newton's law of inertia is illustrated in test with seat belts, crash dummies, and air bags.
Five metal samples, with equal masses, are heated to 200oC. Each solid is dropped into a beaker containing 200 ml 15oC water. Which metal will cool the fastest? A) aluminum B) copper Eliminate C) gold D) platinum
Aluminum, due to its higher thermal conductivity, will cool the fastest when dropped into 15⁰C water.
Explanation:In this scenario, the metal samples that cool fastest will be the one with the highest thermal conductivity. Thermal conductivity is a property that determines how quickly heat is transferred within a material. Of the materials provided, Aluminum has the highest thermal conductivity. Therefore, Aluminum will lose its heat quickest when dropped into the 15⁰C water, cooling fastest.
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imagine you are asked to push a heavy box across the floor. At first you need to push very hard but once the box has started move you can push less strongly yet still keep it moving. Why is it
To push a heavy box, more force is initially required to overcome static friction than kinetic friction once it's moving. Adding mass increases the required force, and reducing friction with oil makes the process easier.
Pushing a heavy box across the floor requires different amounts of effort due to the static and kinetic friction forces at play. Initially, a greater force is required to overcome static friction, which is the resistance to motion that occurs when two objects are not moving relative to each other. Once the box begins to move, only kinetic friction, which is generally less than static friction, opposes the motion, hence less force is needed to keep the box moving.
If you add mass to the box, such as placing another box on top, you would have to exert more force to both start and maintain its movement. Surfaces with higher friction require more effort to move an object across them, which is why it's harder to push heavy objects on rough surfaces compared to smooth ones. Moreover, when a surface is oiled, friction is reduced, making it easier to start and continue the movement of the box.
In this lab, you will use a magnet and a simple circuit to examine the concepts of electricity and magnetism. Think about how these ideas can be shown experimentally. In the space below, write a scientific question to address by doing this experiment.
Sample Response: How can magnetic and electric fields be demonstrated?
Electromagnetism is defined as the branch of physics, in which interaction between electric and magnetic fields is studied.
In the presence of a magnetic field, the electrons move and produce an electric current. The experiment in which electromagnetism can be shown in the making of an electromagnet.
The electromagnet is a type of magnet, in which a magnetic field is generated due to the presence of electric current.
The experiment in which magnet and simple circuit can examine the concepts of electricity and magnets is making of an electromagnet.
To perform the experiment, the things required are:
copper wire, battery, iron nail, and other small magnetic things.
Steps for conducting the experiments include:
The copper wire should be wrapped around the iron nail. The one end of the wire should be loose. The wire should form the coil-like structure on the nail. The plastic coating of the wire from the loose ends should be removed. The uncoated wires should be attached to the different terminals of the battery. Now, the iron nail should be placed near the small magnetic objects. Thus, the magnetic objects will be attracted to the iron nail, explaining the phenomenon of the electromagnetism. In the presence of electric fields, the iron nail can be treated as an electromagnet.Question:
How does the electric field propagate through the magnetic field?
Therefore, electromagnets are the classic demonstration of electric and magnetic fields working together.
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Which of these is true of an inelastic collision between two objects in a closed system but not of an elastic collision? Total momentum is conserved. Total kinetic energy is conserved. Kinetic energy is less after the collision. Total momentum is not conserved.
In an inelastic collision within a closed system, the kinetic energy is less after the collision whereas the total momentum remains conserved.
Explanation:The true statement about an inelastic collision between two objects in a closed system, but not of an elastic collision, is that kinetic energy is less after the collision. In an inelastic collision, kinetic energy is not conserved because some of the kinetic energy may be converted into other forms such as thermal energy or potential energy. However, total momentum is conserved in both elastic and inelastic collisions, as long as the net external force on the system is zero.
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The image formed by a convex spherical mirror will always be
A. upright and larger than the object.
B. upright and smaller than the object.
C. inverted and larger than the object.
D. inverted and smaller than the object.
I don’t believe it’s C or D. If you believe so can you please explain? Pennfoster Test
Plane mirrors and convex mirrors only produce virtual images. Only a concave mirror is capable of producing a real image and this only occurs if the object is located a distance greater than a focal length from the mirror's surface. 10. The image of an object is found to be upright and reduced in size.
So B
Which of the following sequences correctly displays the energy transformation from the inside of a battery to the igniter inside a car's engine? A. Heat Energy Electrical Energy Chemical Energy B. Electrical Energy Chemical Energy Heat Energy C. Chemical Energy Electrical Energy Heat Energy D. Chemical Energy Mechanical Energy Heat Energy
C: Chemical Energy - Electrical Energy - Heat Energy
Kip shoots a basketball from the three-point line and wins the game for his team. Which of the following is the reaction force? Kip's arm moving, the basketball moving into the basket, or winning the game?
Answer:
the basketball moving into the basket is the correct answer
Explanation:
anthony is learning about electric circuits. he has started building a circuit shown below. which of the following items should he add to his circuit to test whether it has a current flowing through
during sublimation particles in a solid room deodorizer move directly into the air as a gas how does the movement of the deodorizer particles change? the particles ___.
A) move fast enough that the attraction between particles is overcome completely
B) Lose enough energy that the movement completely stops
C) Move slowly enough that strong attractions form, pulling the particles together
D) Are only able to slip and slide past each other
Answer: Option (A) is the correct answer.
Explanation:
Sublimation is a process in which molecules of a solid substance are converted directly into gaseous phase without undergoing liquid phase.
This is because solid particles absorb the heat from their surroundings due to which bond between the molecules are broken down. As a result, molecules gain kinetic energy and they move rapidly into the atmosphere.
Thus, we can conclude that in the given situation the particles move fast enough that the attraction between particles is overcome completely.
The formula for calculating work is ___.
force divided by distance
force multiplied by distance
power divided by time
distance multiplied by time
The formula for calculating work is force multiplied by distance; that is the second option, as work is a measure of the energy transferred to or from an object and is calculated by multiplying the force with distance.
What is the work done by an object?Work is a physical concept that describes the energy transferred when a force is applied to an object and is caused to move a certain distance and work is said to be done which can be positive, negative, or zero, depending on the direction and magnitude of the force. The formula expresses the fact that the amount of work done on an object depends on both the magnitude of the force applied and the distance, and is written as W = F x d.
Hence, the formula for calculating work is force multiplied by distance; that is the second option.
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when the air in a submarine's huge air tanks is decompressed and it displaces the water in the ballast tanks with air, what does the submarine do?
A. It sinks B. It floats C. It provides air to the passengers
Decompressing the air in a submarine's air tanks displaces the water in the ballast tanks with air, reducing the submarine's density and making it float. Therefore, the correct answer is B. It floats.
The student asked, "When the air in a submarine's huge air tanks is decompressed and it displaces the water in the ballast tanks with air, what does the submarine do? A. It sinks B. It floats C. It provides air to the passengers".
When the air in a submarine's huge air tanks is decompressed, it displaces the water in the ballast tanks with air. This action reduces the overall density of the submarine, making it less dense than the surrounding water, and as a result, the submarine floats.
Therefore, the correct answer is: B. It floats.
These four surfaces are opaque; that is they reflect or absorb certain rays of light determine the color
Of each surface based on the diagrams
When positively charged particles were radiated onto a gold atom, a few of the particles bounced back. Which of the following caused this?
Positively charged protons in the nucleus of the gold atom
Positively charged electrons in the nucleus of the gold atom
Negatively charged protons around the nucleus of the gold atom
Negatively charged electrons around the nucleus of the gold atom
Positively charged protons in the nucleus of the gold atom .... rutherford scattering ???
Answer:
Positively charged protons in the nucleus of the gold atom
Explanation:
which is an angiosperm. A.fern B.moss C.pine D.tulip
Earth is approximately 4.5 billion years old. Is it likely that any of the rocks that were on Earth's surface when it first formed are still in existence? A. No, most of Earth's magma did not solidify until 1 billion years ago. B. Yes, Earth's surface has changed very little since Earth was first formed. C. No, rock material is constantly recycled on Earth's surface through the rock cycle. D. Yes, rocks are very hard and should be able to survive for 4.5 billion years.
A. is the anwer
No, rock material is constantly recycled on Earth's surface through the rock cycle.
The spring in a toy rocket launcher has a spring constant of 13 N/m. How far must you compress the spring to cause it to exert a force of 2.5 N?
Answer:
Distance, x = 0.19 meters
Explanation:
It is given that,
Spring constant of the toy rocket, k = 13 N/m
Force applied on the spring, F = 2.5 N
We have to find the spring constant of the spring. It can be calculated using Hooke's law as :
F = - kx
[tex]x=\dfrac{F}{k}[/tex]
[tex]x=\dfrac{2.5\ N}{13\ N/m}[/tex]
x = 0.19 meters
Hence, the spring must be compress to cause it to exert a force of 2.5 N.
a plane takes off at 34 m/s if it accelerates from rest and takes 7.2 seconds to lift off find the acceleration
The largest salami in the world, made in Norway, was more than 20 m long. If a hungry mouse ran around the salami’s circumference with a tangential speed of 0.17 m/s, the centripetal acceleration of the mouse was 0.29 m/s2 . What was the radius of the salami?
Answer: 0.09 m
Explanation:
Centripetal acceleration in terms of tangential speed is:
[tex]a_c=\frac{v^2_t}{r}[/tex]
where r is the radius.
It is given that,
centripetal acceleration of the mouse, [tex]a_c=0.29 m/s^2[/tex]
tangential speed , [tex]v_t=0.17m/s[/tex]
Radius of salami is:
[tex]r =\frac{(0.17m/s)^2}{0.29 m/s^2}=0.09m[/tex]
Thus, the radius of the salami is 0.09 m.
Given the tangential speed of 0.17 m/s and the centripetal acceleration of 0.29 m/s², the radius of the salami is approximately 0.09 meters.
The formula for centripetal acceleration in terms of tangential speed is:
ac = v_t² / r
where r is the radius.
Given:
- Centripetal acceleration of the mouse, ac = 0.29 m/s²
- Tangential speed, v_t = 0.17 m/s
To find the radius r of the salami:
r = (v_t²) / ac
r = (0.17 m/s)² / 0.29 m/s²
r = 0.09 meters
Thus, the radius of the salami is 0.09 meters.
From inside to out, describe the components of an atom. What makes one element's atoms differ from another element's atoms?
Answer:
This is the answer bro
Explanation:
Normally, the number of electrons is equal to the number of protons, which makes atoms electrically neutral. The number of protons in an atom is the defining feature of an atom. It's what makes one element different from another. The number of protons in an atom is called its atomic number.
IG say._chrs
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The part of the element that defines it is the element's number of ____.
Please answer quickly!
A toy car is placed at 0 On a number line. It moves 9 cm to the left , then 4cm to right, and then 6cm to the left . The total distance the toy car traveled is
Study the interaction of the light rays with the mediums. Classify the medium in each image as being transparent or opaque.
Light can be reflected, transmitted, or absorbed. You have read that EM waves can interact with a material medium in the same ways that mechanical waves do. Three forms of interaction play an especially important role in how people see light. One form is reflection.
What is reflection?
"Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface."
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Diamonds are a very dense material. Predict what would happen to the light ray if you projected it from air through a diamond.
With the density given, the thing that'll happen to the light ray is that the diamond would act like a prism, or the light would break up and disappear.
What is density?Density simply means the degree of compactness of a substance. It's the degree of consistency meaured.
Diamonds are a very dense material. The thing that would happen to the light ray if you projected it from air through a diamond is that the light will disappear.
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Which one of the following types of electromagnetic radiation causes certain substances to fluoresce?
A. Cosmic rays
B. X rays
C. Infrared waves
D. Ultraviolet rays
Final answer:
Ultraviolet (UV) rays are the type of electromagnetic radiation that causes substances to fluoresce by exciting their electrons.
Explanation:
The type of electromagnetic radiation that causes certain substances to fluoresce is ultraviolet (UV) rays. Fluorescence occurs when a substance absorbs this radiation and then emits light. Ultraviolet rays have higher energy (as opposed to infrared waves, for example) and can excite electrons in a substance to a higher energy level. When these electrons return to their original energy state, they release energy in the form of visible light, causing the substance to appear to glow or fluoresce.
What are sun spots??????????
The surface of the Sun has dark areas called sunspots. They are cooler than the hot, yellow areas. Sunspots were discovered by the astronomer Galileo Galilei. Some sunspots can last weeks or even months.
Which of the following astronomical bodies or collection of astronomical bodies is likely to be a part of the others listed?
Milky Way
Solar system
Sun
Universe
I just don't understand the question and if you do please explain. If it had to be one, I'd pick sun.
Answer:
SUNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
In a heat engine, if 700 J of heat enters the system, and the piston does 400 J of work, what is the final internal (thermal) energy of the system if the initial energy is 1,200 J?
1,100 J
1,500 J
900 J
300 J
The answer is 1500 J
consider the variables in the equation for the first law of thermodynamicis .
Read the scientific question below.
"Do fertilizers make plants grow faster?"
What is a likely hypothesis for the question?
Yes, fertilizers make plants grow faster.
No, water and sunlight make the plants grow faster.
If we fertilize a plant, then its height increases faster.
If we add fertilizers to the soil, then there will be nutrients in the soil.
Answer:
It is c:if we fertilize a plant, then its height increases faster.
Explanation:
Got it right on the test
What important temperatures does the Celsius scale use for a basis?
A) the boiling and freezing point of water
B) temperatures on the sun and the moon
C) the rang of human body temperatures
D) high and low air temperatures
the small wobble in the orbit of Neptune helped astronomers discover Pluto. this suggests that this wobble was MOST LIKELY caused by A) fusion B) gravity C) friction D) magnetic attraction
The small wobble in the orbit of Neptune helped astronomers discover Pluto. This suggests that this wobble was MOST LIKELY caused by
A) fusion. x
B) gravity. correct
C) friction. x
D) magnetic attraction. x
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