In physics, another term for the position of an object is 'displacement'. Displacement refers to the change in position of an object in relation to a reference frame, and specifies the direction of movement.
Explanation:In the field of physics, another term for the position of an object is displacement. Displacement refers to the change in position of an object in relation to a reference frame. For instance, if an object moves to the right relative to a whiteboard, its position, or displacement, changes.
To illustrate, imagine an airplane in motion. To describe the position of a passenger in the airplane, you would use the airplane, not Earth, as the reference frame. Therefore, the passenger's displacement could be toward the rear or front of the airplane.
The key point to remember is that displacement not only refers to the change in position, but also specifies the direction of the movement. It's therefore considered a vector, and can be either positive or negative, depending on the chosen positive direction.
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Describe what happens to the energy of a wave if the frequency decreases. Enter your answer in the space provided.
The energy of the wave will decrease.
The energy of a wave is given as
E = h f
where E = energy of waver
h = plank's constant
f = frequency of the wave.
From the formula , we see that the energy of the wave is directly proportional to the frequency of the wave. hence as the frequency of the wave decrease, the energy of the wave will decrease.
what is the mass of an atom with seven protons.seven neutrons,and eight electrons?
Explanation:
It is given that the atom has 7 protons this means that atomic number of the atom is 7.
As we know that atomic mass of an atom is the sum of total number of protons and neutrons present in the atom.
So, atomic mass of the given atom = no. of protons + no. of neutrons
= 7 + 7
= 14
Thus, we can conclude that the mass of given atom is 14 g/mol.
The mass of an atom with seven protons, seven neutrons, and eight electrons is 14 g
Given the following information from the question
Number of protons = 7 protons
Number of neutrons = 7 neutrons
Number of electrons = 8 electrons
The mass number of an atom is the sum of its atomic number and neutron number.
Mass number = number of neutron + atomic number
Since the atomic number of an element is equal to the number of protons of such elements, hence;
Mass number = 7 + 7
Mass number = 14 g
Hence the mass of an atom with seven protons, seven neutrons, and eight electrons is 14 g
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under normal conditions describe how increasing the temperature affects the solubility of a typical salt
What is the amount of displacement of a runner who runs exactly 2 laps around a 400 meter track?
A) 400 meters
B)0 meters
C)800 meters
The displacement is zero.
Hence, the correct option is B.
The displacement of an object is the change in its position.
In this case, the runner starts and ends at the same point, so the displacement is zero.
Even though the runner runs 800 meters (2 laps x 400 meters/lap), the runner does not change position.
The runner ends up where they started, so the displacement is zero.
Therefore, The displacement is zero.
Hence, the correct option is B.
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How does energy travel?
1. In strings
2. In beams
3. In pulses
4. In waves
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A 2.9 kg model rocket accelerates at 15.3 m/s2 with a force of 44 N. Before launch, the model rocket was not moving. After the solid rocket engine ignited, hot gases were pushed out from the rocket engine nozzle and propelled the rocket toward the sky. Which of Newton’s laws apply in this example? Check all that apply.
A the first law
B the second law
C the third law
D the fourth law
E the fifth law
Answer:
A the first law
B the second law
C the third law
Explanation:
All three Newton laws are involved in this example. Let's see why:
1) First Law: "an object which has a zero net force acting on it stays at rest if it was at rest or continue to move at constant speed if it was already moving" --> this law applies to the first part of the problem, before the launch, when the rocket is not moving: since no forces are acting on it, it stays at rest.
2) Second law: "a net force F applied to an object of mass produces an acceleration a given by the relationship:
[tex]F=ma[/tex]"
This law applies when the rockets starts its motion: in fact, a force of 44 N is applied to the rocket of mass 2.9 kg, and its acceleration is a=15.3 m/s^2, and we see that these numbers satisfy the previous equation.
3) Third law: "when an object A exerts a force on object B, object B exerts an equal and opposite force on object A"
This law applies when the rocket is in motion: in fact, the rocket pushes the hot gases outside, so the hot gases pushes back on the rocket, accelerating it so it moves forward.
What is the correct formula for finding the frequency of an electromagnetic wave
A. F=c-A
B. F=A/c
C. F=A+c
D. F=c/A
If a car is traveling on the highway at a constant velocity, the force that pushes the car forward must be A. equal to the weight of the car. B. greater than the force of friction exerted upon the car. C. equal to the force of friction exerted upon the car. D. greater than the weight of the car.
Answer:
C. equal to the force of friction exerted upon the car.
Explanation:
We know according to Newton's First Law Of Motion , an object in rest or in uniform motion will be in same state unless or until an external force is not provided.
In other words , When no force apply on the body it being in the state of uniform motion or in rest.
In the case given, the car is travelling in the highway at a constant velocity. Therefore net force acting on car in horizontal direction is equal to zero.
It means all the forces acting on horizontal direction cancelling each other which cause net force equals to zero.
Here, to cancel force of friction the force that pushes the car in forward direction must be equals to it.
Therefore, C. option is correct.
how can you tell the difference between halite, calcite, and gypsum
The electric potential difference of a 150 µF capacitor is measured across the terminals of the capacitor and found to be 5 volts. What is the potential energy of the capacitor?
Answer:
it's 2 on edge
Explanation:
A boat initially traveling at 10. meters per second accelerates uniformly at the rate of 5.0 meters per second2 for 10. seconds. How far does the boat travel during this time?
The boat would travel 350 meters during the given time period, assuming uniform acceleration. This is calculated using the equation of motion for distance.
Explanation:The distance traveled by the boat can be calculated using the equation of motion: S = ut + 0.5at², where S is the distance traveled, u is the initial velocity, a is acceleration and t is time. In this case, u = 10 m/s, a = 5 m/s² and t = 10 s.
Substituting these values into the equation we get: S = 10*10 + 0.5*5*10². So, the total distance travelled by the boat = 100 m + 250 m = 350 m. Therefore, the boat travels 350 meters during this time.
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Which state(s) of matter have no definite shape or volume?
Answer: gaseous
Explanation:
The major states of matter are solid, gaseous, liquid and plasma. However, there numerous others continued to be discovered such as Bose-Einstein condensate due to continuous research.
Solid state of matter usually have shape and volume which is a major physical characteristic of solids, liquid state of matter do not have shape but have volume however, the tend to occupy the shape of the container with respect to their volume in the container. Gaseous state of matter do not shape or volume but just occupy space in the container.
How does the resistance change as you add bulbs to a series circuit? The resistance does not change. The resistance decreases. The resistance increases.
Answer:
The resistance increased
Explanation:
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A car with a mass of 2000 kg is moving around a circular curve at a uniform velocity of 25 m/s per second. The curve has a radius of 80 m what is the centripedal force on the car
How does paving parking lots and roads with concrete or asphalt affect surface water and groundwater?
is bread mold chemical or physical
If it takes light 26,000 years to travel from the Sun to the center of the Milky Way galaxy, how far is the Sun from the center of the Milky Way? 26,000 light-years 2,600 light-years 260 light-years 26 light-years
It's about 26,000 lightyears away from the galactic center.
Why is Melanie's diagram of the phases of the moon incorrect? First quarter moon should be between the sun and Earth. Third quarter moon should be between the sun and Earth. The position of the full moon and new moon have been interchanged. The position of the first quarter moon and third quarter moon have been interchanged.
Frieda, age 16, is a boating enthusiast who can tie 20 different kinds of knots. This type of knowledge is most aptly described as __________ knowledge.
The electric field between two parallel plates has a magnitude of 875 N/C. The positive plate is .002 m away from the negative plate. What is the electric potential difference between the plates?
The electric potential difference between two parallel plates with an electric field strength of 875 N/C and separated by 0.002 m is 1.75 volts.
The question asks about the electric potential difference between two parallel plates given the electric field magnitude. To find the electric potential difference (V) between the plates, we use the equation V = E × d, where E is the electric field strength and d is the distance between the plates.
In this case, the electric field (E) is 875 N/C, and the distance (d) is 0.002 m. Therefore, the electric potential difference is:
V = E × d = 875 N/C × 0.002 m = 1.75 V
The electric potential difference between the plates is 1.75 volts.
the lowest pitch that the average human can hear has a frequency of 20.0 Hz. if sound with this frequency travels through air with a speed of 331 m/s what is it's wavelength?
The lowest pitch that the average human can hear has a frequency of 20.0 Hz. if sound with this frequency travels through air with a speed of 331 m/s it's wavelength is 16.55 m.
What is frequency?The number of vibrations counted per second is called frequency. A wave is a group of vibrations that are referred to as energy. The bottom node is known as the crest, and the top node is known as the trough.
λ = wave velocity/frequency
λ = 331 m/s / 20.0 Hz
λ = 16.55 m
The lowest pitch that the average human can hear has a frequency of 20.0 Hz. if sound with this frequency travels through air with a speed of 331 m/s it's wavelength is 16.55 m.
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A cable capable of pulling 4,500 N snapped while trying to drag a 20,000 N compressor across the street. What is the coefficient of static friction for this scenario?
Note: the 4500 N cable is used as Fs and is calculated the same as Fk
0.225
> 0.225
4,500 N
> 4,500 N
4.44
> 4.44
Please explain to me how you get your answer.
Answer:
[tex]\mu > 0.225[/tex]
Explanation:
The cable snapped because the frictional force [tex]f_s[/tex] was greater than the tension in the rope:
[tex]f_s > 4,500N[/tex]
Now,
[tex]f_s =\mu N[/tex]
where [tex]\mu[/tex] is the coefficient of static friction, and [tex]N[/tex] is the normal force. In our case, the normal force on the compressor is 20,000 N; therefore,
[tex]f_s =\mu (20,000N )[/tex].
Putting this into the condition [tex]f_s > 4,500N[/tex], we get:
[tex]\mu (20,000N )> 4,500N[/tex]
[tex]$\mu > \frac{4,500N}{20,000N} $[/tex]
[tex]\boxed{\mu > 0.225.}[/tex]
Answer:
>0.225 is correct if its not please let me know I'm willing to help!
The coefficient of linear expansion of iron is 1.0 × 10−5 per C◦ . The surface area of an iron cube, with an edge length of 5.0 cm, will increase by what amount if it is heated from 10◦ C to 60◦ C?
Based on the linear expansion of iron, the increase in area is 0.15cm²
What is linear expansivity?Linear expansivity is the increase in length per unit length of a material for every degree rise in temperature.
The linear expansion of iron is α = 1 × 10⁻⁵/°C
Length edge of the iron cube is 5cm
the surface area of cube A = 6L²
Initial surface area = 6 * 5² = 150cm²
The edge length of cube, L₂ after being heated from
10°C to 60°C is calculated using the formula below:
L₂ = L[I + α*dt]where
α is the linear expansion of irondt is the temperature differencedt = 60-10 = 50°C
L₂ = 5(1 + 1 × 10⁻⁵ * 50)
5.0025cm
The surface area of the cube after heated A' is
A' = 6 * 5.0025²
A' = 150.1500375 cm²
The increased area, A' -A = (150 - 150.1500375) cm²
The increase in area is 0.15cm²
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Plants use a process called cellular respiration in order to obtain energy from the food they produce during photosynthesis. When a plant undergoes cellular respiration, it...
Question 5 options:
produces sugar inside its cells.
breaks down the sugar inside its cells.
releases oxygen through its stomata.
absorbs sunlight through its chloroplasts.
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List two benefits and two applications of ultrasound
Ultrasound benefits;
1. They are used in medicine for a noninvasive diagnostic scan of the body
2. They have no ionizing radiation hence harmless compared to others radiations such as X-rays
Applications of ultrasound;
1. Used in medicine e.g by obstetricians to monitor developing fetus in the womb
2. Used in therapy such as ultrasound assisted thrombolysis
Sample Response: Two benefits of ultrasound imaging are that the patient is not exposed to ionizing radiation and the images are captured in real time. Ultrasound imaging is used to view the fetus during pregnancy and in echocardiograms to view the heart
Can anyone define thermostat and list electrical appliances that have a thermostat?
A thermostat is a device that controls the temperature of a system by sensing changes in temperature and automatically adjusting the heating or cooling system. Various electrical appliances have thermostats to maintain a set temperature by turning on and off the heating or cooling elements as needed.
Explanation:A thermostat is a device that controls the temperature of a system by sensing changes in temperature and automatically adjusting the heating or cooling system. It helps maintain a set temperature by turning on and off the heating or cooling elements as needed.
There are many electrical appliances that have a thermostat, including:
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Which statement below is false? A) Weight depends on the force of gravity. B) Mass is the amount of matter in an object. C) Mass is a constant no matter where you are located. D) Weight is a constant no matter where you are located.
The false statement is "Weight is a constant no matter where you are located." The correct option is D.
A) Weight depends on the force of gravity: This statement is true. Weight is the force with which an object is pulled toward the center of the Earth (or any other celestial body) due to gravity. The weight of an object can vary depending on the strength of the gravitational field.
B) Mass is the amount of matter in an object: This statement is true. Mass is a measure of the amount of matter contained in an object. It is an intrinsic property and remains constant regardless of the location of the object.
C) Mass is a constant no matter where you are located: This statement is true. Mass is an intrinsic property of an object and is independent of its location. It represents the quantity of matter an object contains and does not change with location or gravitational field.
D) Weight is a constant no matter where you are located: This statement is false. Weight depends on the gravitational force acting on an object, which varies depending on the location. The weight of an object is equal to the mass of the object multiplied by the acceleration due to gravity at that location. Since the strength of gravity can vary from one location to another, the weight of an object will also vary accordingly. For example, an object will weigh less on the Moon compared to Earth due to the Moon's weaker gravitational pull.
Hence, The correct answer is option D.
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the SI unit for pressure is pascal (Pa). One hectopascal would equal how many pascals?
0.1 Pa
10 Pa
100 Pa
1000 Pa
Answer:
1 hectopascal = 100 Pascal
Explanation:
Pressure exerted by an object is defined as the force acting on it per unit area. Mathematically, it is given by :
[tex]pressure=\dfrac{force}{area}[/tex]
The SI unit of unit of pressure is pascal. It is equivalent to :
[tex]1\ Pa=N/m^2[/tex]
or
[tex]1\ Pa=kg\ m^{-1}s^{-2}[/tex]
1 hectopascal = 100 Pascal
So, one hectopascal equals 100 pa. Hence, the correct option is (c).
Animals do not contribute to natural erosion. Please select the best answer from the choices provided T F
The answer is False hope this helps
Answer: false
Explanation: Animals do contribute to natural erosion. Plants help in keeping the soil at place. Some animals burrow the soil to live and helps in moving of soil from one place to another( process called soil erosion). Some animals leads to rapid destruction of plants and leads to faster erosion of soil as plants helps to keep soil at place. Lesser the number of plants will lead to more soil erosion.
two people are pushing a couch from opposite sides. one person pushes with a force of 2 N. the other person pushes with a force of 4 N. which of the following best describes how the couch will move?
The couch will move in the direction of the larger force being applied, which is the side of the person pushing with a force of 4 N.
Explanation:When two people push a couch from opposite sides with forces of 2 N and 4 N respectively, the couch will move in the direction of the larger force. In this instance, the person applying the 4 N force will cause the couch to move in their direction, assuming no other forces are at play (like friction from the floor or additional forces from other directions). The movement can be predicted using Newton's Second Law of Motion, which states that the acceleration of an object is directly proportional to the net force acting upon it and inversely proportional to its mass.