Answer:
shuffling shoes
Explanation:
All the mass we ever encounter is positive - nothing weighs less than zero. What makes us think charge is different that there are both positive AND negative charges?
Answer:
Mass is considered as positive as it is the amount of matter and as nothing weighs less than zero. But the concept of charge in electricity can be both positive and negative because of the behaviour Observed in electrical phenomena , Conservation of charge , Interaction of charged objects and Atomic and subatomic structure
Explanation:
Understanding the nature of mass and its positivity
Mass is the amount of matter in an object. As the amount of matter cannot be less than zero. It is always greater than or equal to zero.
Exploring the concept of electric charge
Incase of electric charge it acts differently as per the system it belongs to, The following are some observation which substantiate the presence of negativity and positivity of electric charge.
a) Observations of electrical phenomena: People have observed electrical effects, such as static electricity, where objects can be attracted or repelled without physical contact. This led to the idea that there are two types of charges involved.
b) Conservation of charge: Scientists observed that charge is conserved in interactions. For example, during various experiments involving the charging and discharging of objects, the total amount of charge in a closed system remained constant. This observation supports the idea of positive and negative charges.
c) Behavior of charged objects: Through experiments, scientists found that like charges repel each other, while opposite charges attract. This behavior is consistent with the existence of positive and negative charges.
d) Atomic and subatomic structure: Detailed studies of atoms revealed that they consist of positively charged protons, negatively charged electrons, and neutral neutrons. The balance between protons and electrons determines the overall charge of an object.
Hence the mass never considered as negative and we think differently for electric charge
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A needle 5cm long can just rest on the surface of the water without wetting. What us it's weight? Surface tension is 0.007N/m
Answer:
c
Explanation:
The diagram shows the protons and neutrons in an atom.
p = protons n = neutrons
Which fundamental force is shown?
O static
o electromagnetic
O strong
O light
p
7
na LA
P
n
Answer:
O strong
Explanation:
From the diagram, we are dealing with strong forces.
Strong forces are one of the four fundamental forces found in nature. The other forces are gravitational forces, electromagnetism and weak interactions.
Strong forces holds protons and neutrons together in an atom. They are domiciled in the nucleus and are sources of nuclear energy. They are also called strong nuclear forces.Answer:
Strong
Explanation:
One way to describe a wave crest is the amount of ___________ applied over an area.
A. force
B. mass
Answer: The answer is force
Explanation:
A man whose mass is 90 kg is 6.38x106m away from the center of the earth. If the Earth’s mass is6x1024kgand the constant Gis 6.67x10-11what is the force of gravity on the man
Answer: force of gravity is 885N
Explanation:
Answer:1N
Explanation:
Mass1(m1)=90kg
Mass2(m2)=6x10^24kg
Gravitational constant(G)=6.67x10^(-11)
Distance apart(d)=6.38x10^6m
Force of gravity(f)=?
F=(Gxm1xm2)/d^2
F=(6.67x10^(-11)x90x6x10^24)/(6.38x10^6)
F=(3.6018x10^16)/(6.38x10^6)
F=1N
Force of gravity=1N
6. A Cadillac Escalade has a mass of 2 569.6 kg, if it accelerates at 4.65m/S
force on the car?
Answer:
F= 2569.6 X 4.65 = 11,948.64
*Multiply the mass and the acceleration to find the force
Explanation:
Answer:11948.64kgm/s^2
Explanation:
Force=mass x acceleration
Force=2569.6 x 4.65
Force=11948.64kgm/s^2
A disk initially rotated counterclockwise at 1.0 rad/s, but has a counterclockwise angular acceleration of 0.50 rad/s^2 for 2 seconds. After this acceleration, the disk is at an angle of 6.0 rad.
What is the disk’s angular position when the acceleration started?
Answer:
Initial angular position of the disc is 3 radian
Explanation:
As we know that the angular acceleration of the disc is given as
[tex]\alpha = 0.50 rad/s^2[/tex]
initial angular speed is given as
[tex]\omega = 1 rad/s[/tex]
now we know that angular displacement of the disc is given as
[tex]\theta = \omega t + \frac{1}{2}\alpha t^2[/tex]
[tex]\theta = 1(2) + \frac{1}{2}(0.5)(2^2)[/tex]
[tex]\theta = 3 rad[/tex]
now we have
[tex]\theta_f - \theta_i = 3 rad[/tex]
[tex]6 rad - \theta_i = 3[/tex]
[tex]\theta_i = 3 ard[/tex]
Final answer:
To find the initial angular position of the disk, we used the kinematic equation for rotational motion and the given values (angular acceleration, initial angular velocity, and final angle) to calculate that the disk's angular position when the acceleration started was 3.0 rad.
Explanation:
The problem is asking us to find the angular position of the disk when it started accelerating. Since we know the angular acceleration, the initial angular velocity, and the final angular position, we can use the kinematic equations for rotational motion to determine the initial angular position.
The kinematic equation we'll use is:
[tex]\( \theta = \theta_0 + \omega_0t + \frac{1}{2}at^2 \)[/tex],
where [tex]\(\theta\)[/tex] is the final angular position,[tex]\(\theta_0\)[/tex] is the initial angular position, [tex]\(\omega_0\)[/tex] is the initial angular velocity, [tex]\(a\)[/tex] is the angular acceleration, and [tex]\(t\)[/tex] is the time.
Given:
[tex]\(\theta = 6.0 \text{ rad} \)[/tex] (final angular position),
[tex]\(\omega_0 = 1.0 \text{ rad/s} \)[/tex] (initial angular velocity),
[tex]\(a = 0.50 \text{ rad/s}^2 \)[/tex] (angular acceleration), and
[tex]\(t = 2 \text{ s} \)[/tex] (time).
We rearrange the equation to solve for [tex]\(\theta_0\)[/tex]:
[tex]\(\theta_0 = \theta - \omega_0t - \frac{1}{2}at^2 \)[/tex]
Plugging in the values:
[tex]\(\theta_0 = 6.0 \text{ rad} - (1.0 \text{ rad/s} \cdot 2 \text{ s}) - \frac{1}{2} \cdot 0.50 \text{ rad/s}^2 \cdot (2 \text{ s})^2 \)[/tex]
[tex]\(\theta_0 = 6.0 \text{ rad} - 2.0 \text{ rad} - 0.50 \cdot 2 \text{ rad} \)[/tex]
[tex]\(\theta_0 = 6.0 \text{ rad} - 2.0 \text{ rad} - 1.0 \text{ rad} \)[/tex]
[tex]\(\theta_0 = 3.0 \text{ rad} \)[/tex]
So the disk's angular position when the acceleration started was 3.0 rad.
An airplane travels 622.4 km from Kansas City to St. Louis. The flight takes 4.7 hours. Calculate the Velocity of the plane
Answer:
132.43km/h
Explanation:
Velocity = displacement/time
Given
Displacement = 622.4km
Time = 4.7 hours
Therefore,
Velocity = 622.4km/4.7hrs
= 132.43km/h
The heat transfer depicted in the image is MOST likely
Answer:
Convection transferExplanation:
There are three kinds of heat transfer: conduction, convection, and radiation.
Conduction is the heat transfer by direct contact of a hot object with a cold object. It is transmitted by the vibration of the particles and not by translation motion. That is not what it is shown: the clouds are not in direct contact with the ground.
Heat transfer by convection is result of the motion of the particles in fluis, like water or air: particles move from hotter regions where they have high kinetic energy to colder regions where the particles have lower kinetic energy. Since the hotter fluids have lower density than the colder fluids, there will be a continous movement of parciles and heat. That is what is shown in the figure with the arrows.
Radiation heat transfer mechanism always occur but is only important when the temperature of the hot object is really high, like in a fire, or in a resistance to red hot, or in the Sun. The heat is radiated by infrarred radiation. That is not what is shown in the figure.
The main reason for making the cover of a vacuum
flask airtight is to prevent heat loss by
A. conduction
B. evaporation
C. radiation
D. convection
Answer:
(A) conduction
Explanation:
parts of that are touching other parts and thus create heat!!!! dont lose that heat!
Answer:
The answer is convention.
A weightlifter lifts a 13.0-kg barbel from the ground an moves it a distance of 1.3 meters. What is the work se does on the barbell?
The work done on the barbell is -165.62 Nm.
Explanation:
Work done on any object is the measure of force required to move that object from one position to another. So it is determined by the product of force acting on the object with the displacement of the object.
In the present problem, the displacement of the object on acting of force is given as 1.3 m. And the weight of the object which is a barbel is given as 13 kg. As the work is to lift the object from the ground, so the acceleration due to gravity will be acting on the object. In other words, the force applied on the object to lift it should be in opposite direction to the acting of acceleration due to gravity.
Thus, [tex]Force = - Mass * Acceleration due to gravity = - 13 * 9.8 =-127.4 N[/tex]
Now, the force is -127.4 N and the displacement is 1.3 m.
So, [tex]Work done = F*d[/tex]
[tex]Work done = -127.4* 1.3 = -165.62 Nm[/tex]
So, the work done on the barbell is -165.62 Nm.
With enough time, would an ice pop melt on a cool autumn day? Explain.
Yes, it is possible that with enough time period, an ice pop will melt on a cool autumn day. As it is not cold enough to keep it in the freezing condition.
What are the conditions for ice formation?An ice cube can stay in the freezing condition when it is most often found at the temperature range above the frontal inversion which is warmer than 0°C and the temperature which is below and colder than 0°C. Icing above the warm frontal surface, in the regions where cloud temperatures are colder than 0°C, is usually confined to a layer which is less than 3,000 feet thickness.
A one inch ice cube at the 75°F room temperature (24°C) will take 45 to 60 minutes to melt at that particular temperature. A standard one ounce cube will take 90 to 120 minutes to melt at the same temperature range.
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Along boundaries plates are brittle and the crust fractures (breaks and cracks) forming ___
Answer:
Along boundaries plates are brittle and the crust fractures (breaks and cracks) forming Faults
Explanation:
Brittle material are substances that looks hard but can be easily broken by strain. Brittle deformation leads to crack and fracture of the material involve. Brittle crust lacks elastic ability , elasticity in this rocks are almost absent.
Fractures and cracks in rocks form fault. Fault is a discontinuity in rocks with an appreciable displacement. Fault is a displacement in rocks relative to one part. Generally, Fault occur when brittle rock fracture or crack, the fractured rocks move relative to one another.
Differential stress can cause rocks to fracture. If that part of the crust lacks ductility the stress on the rock will cause a brittle deformation. The brittle deformation causes fracture(breaks and cracks) leading to structure like Faults and Joints.
SO MANY POINTS! WILL MARK BRAINIEST!!!! PLZ BE FASSTT!
Which point on the roller coaster's path represents the point where potential energy is at a maximum? *
Point A
Point B
Point C
Point D
Which point on the roller coaster's path represents the point where kinetic energy is at a maximum? *
Point A
Point B
Point C
Point D
BTW BOTH QUESTIONS ARE BASED ON THE PICTURE
Answer: Point A is the answer for the potential energy. Point D is the answer for the kinetic energy.
Explanation:
Answer:
point a and point d
Explanation:
A train travels a distance of 240km in 3 hours. Calculate the speed of the train
A- 80km/h
B- 720km/h
C- 80m/h
Which answer best describes the scientific method?
O
A. An experiment that has no dependent variables
B. Five processes that scientists use to answer questions
C. A variable that depends on another variable
O
D. The exact order of steps used in every experiment
option no. c
Explanation:
A variable that depends on another variable
Answer:
B. Five processes that scientists use to answer questions
Explanation:
Mercury's surface has many craters because _____.
it has no atmosphere to protect it from meteoroids or comets
it has several active volcanoes which erupt and melt holes in the rock
it once collided with another planet, which caused damage to its crust
it has a thick atmosphere which traps meteoroids and comets near the surface
Mercury's surface has many craters because it has no atmosphere to protect it from meteoroids or comets.
Mercury's surface is riddled with craters, owing to the lack of a strong atmosphere to shield it from meteoroids and comets.
Meteoroids are small rocky or metallic objects in space that range in size from minuscule particles to bigger things with diameters of several metres.
They are generally relics of the solar system's early creation or debris expelled by asteroids or comets.
Unlike Earth, which has an atmosphere that burns up or deflects most smaller things that enter it, Mercury's thin atmosphere offers little to no protection.
Thus, meteoroids and comets can collide with its surface, causing countless craters to form over time.
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A ____________ is a machine which contains a lever and a wedge that combine to make work easier.
A) knife
B) screw driver
C) pair of scissors
D) handicapped ramp
Answer:
D
Explanation:
You need to pull a special "lever" to let the handicapp ramp out and it uses a wedge to push itself out
C: pair of scissors
- this is because the blades on a pair of scissors would identify as the wedge
- and the grip part of the scissors would be the lever.
If the radius of the atom is the distance from point A to D, where is the MOST likely location of the LEAST concentration of mass?
A)
A
B)
B
C)
C
D)
D
The MOST likely location of the LEAST concentration of mass in an atom is at point D, which is at the radius of the atom.
1. The nucleus of an atom contains the majority of the mass and is located at the center of the atom.
2. As you move away from the nucleus towards the electron cloud, the concentration of mass decreases significantly.
3. At the radius of the atom (point D), the mass is distributed over a larger area, leading to the least concentration of mass at this point.
4. Therefore, point D, being at the outer edge of the atom, is the most likely location of the least concentration of mass in an atom.
This concept is crucial in understanding the distribution of mass within an atom and how it varies based on distance from the nucleus.
what are the similarities between air pressure, temperature, humidity, and fronts?
Answer:
Explanation:
An air mass is a large body of air that exhibits uniform temperature and moisture characteristics and helps to determine the weather within an area. Warm air masses tend to form over oceans in warm-temperature regions of the tropics and sub-tropics, while cold air masses tend to form over land in cold-weather regions nearer the poles. The cold air masses that form at the poles move toward the equator, while the warm air masses that form at the equator move toward the poles. These air masses can undergo gradual, but significant, changes as they pass over warmer or colder land surfaces encountering different types of air. These boundary lines are called fronts.
Cold fronts occur when a cold air mass moves into warmer air. Since cold air is heavier than warm air, the incoming colder air forms a wedge that displaces the warm, and often moist, air at the surface. As the warm moist air rises, towering clouds often form releasing energy in the form of brief, intense rain storms with high winds and lightning. On the other hand, warm fronts will ride up and over cold air near the surface. These fronts can also cause clouds and rain, but they tend to be less violent and longer lasting.
Air pressure is determined by how much the air weighs in a given space. Pressure varies with altitude, with denser air residing in lower altitudes and lighter air in higher altitudes. This is caused by the Earth’s gravity—its strength decreases the farther away from the center of the planet, therefore it holds fewer molecules together in the same amount of space. Air pressure is also a function of temperature and density; differences in pressure can be an important weather maker. As air descends, it warms, inhibiting cloud formation which is often associated with good weather. Air rises in areas where the pressure at the surface is low. As it rises, the air cools and the humidity condenses to form clouds and precipitation. The centers of all storms are areas of low pressure; therefore, low pressure is often associated with bad weather.
which direction does air pressure exert force at sea level
Answer:
It is exerted in all directions at sea level, and this is because air molecules move in all directions.
At sea level, air pressure exerts force in all directions.
Direction of air pressure at sea levelAt sea level, air pressure exerts force in all directions. This force, known as atmospheric pressure, is the result of the weight of the air molecules above a given point.
Since air is a fluid, the air pressure at any location is distributed evenly in all directions, including upward, downward, and sideways.
This balanced distribution of air pressure is what helps maintain the stability of the Earth's atmosphere and is an essential factor in various weather phenomena and atmospheric dynamics.
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Which statement accurately describes renewable energy sources?
They take millions of years to form and should be used responsibly.
They include fossil fuels and hydroelectric power.
They are quickly replenished.
They provide the majority of the energy for the United States.
Answer:
They are quickly replenished
Explanation:
Renewable resources will never run out because they are quickly replaced by nature.
ask me if I you need more help
Answer:
c
Explanation:
The man who discovered that for an interference pattern to occur, the only explanation is that light is a wave was:
a) Newton
b) Young
c) Taylor
d) Planck
Answer:
Thomas Young
:0
:)
Answer:
it was Young
Explanation:
7. What two controls on a car cause a change in speed? What control causes a change in
velocity?
-- A change in speed can be either speeding up or slowing down. These effects can be caused by the gas pedal or the brake pedal.
-- Velocity is made of the car's speed and direction. These can be changed by the gas pedal, the brake pedal, or the steering wheel.
Final answer:
The two controls causing a change in car speed are the accelerator and brakes. For velocity, any change in speed or direction (affected by the accelerator and steering wheel) can alter it. An odometer measures distance traveled, while a speedometer measures instantaneous speed.
Explanation:
The two controls on a car that cause a change in speed are the accelerator (gas pedal) and the brakes. Pressing the accelerator increases the car's speed, while applying the brakes decreases it. The control that causes a change in velocity is both the accelerator and the steering wheel. This is because velocity includes both speed and direction. Thus, pressing the accelerator affects speed, which is a part of velocity, and turning the steering wheel alters the direction of the car's velocity.
Velocity is defined by both speed, which is a scalar quantity, and direction, a vector quantity. Changing either of these two or both simultaneously, results in a change in velocity. Acceleration, therefore, refers to the rate at which velocity changes over time and can occur due to a change in speed, direction, or both. For example, when a car moves from left to right at a constant velocity and the accelerator is pressed, both the velocity and acceleration vectors point rightwards. However, if the brakes are applied while the car is still moving to the right, the velocity remains directed to the right but the acceleration vector points to the left, indicating deceleration.
The car's odometer measures the total distance traveled, which is a scalar quantity, while the speedometer measures the instantaneous speed of the car, also a scalar. To illustrate the difference between average speed and the magnitude of average velocity consider a car trip where the car moves in a circle and returns to its starting point. The average speed is the total distance traveled divided by the elapsed time, whereas the magnitude of average velocity would be zero since displacement is zero after completing the loop. The two quantities are the same if the car travels in a straight line without changing direction.
Explain how a current is created and how a circuit works.
Answer:
See the explanation below
Explanation:
Ohm law is defined as the voltage is equal to the current product by the resistance.
V = I * R
where:
V = voltage [volt]
I = current [amp]
R = resistance [ohm]
Therefore for a current to exist there must be a voltage and elements that exert resistance to the passage of electrons from one point to another.
There must be a closed loop between the connection points of the source, so that the current can flow freely. Any opening of the circuit will interrupt the current flow.
An electric appliance draws 1.5 amperes of current when it is connect
24-volt source. What is the resistance of this appliance? (5F)
F
0.063 ohm
G
11 ohm
H
16 ohm
54 ohm
Answer:16ohm
Explanation:
Potential difference(v)=24volts
Current(I)=1.5amperes
Resistance(r)=?
r=v/I
r=24/1.5
r=16ohms
Final answer:
To calculate the resistance of an electrical appliance using Ohm's Law, divide the voltage by the current. With a 24-volt source and a draw of 1.5 amperes, the appliance's resistance is 16 ohms.
Explanation:
To find the resistance of an electrical appliance, we can use Ohm's Law, which states that resistance equals voltage divided by current (R = V/I). Given that the appliance draws 1.5 amperes of current from a 24-volt source, we can calculate the resistance as follows:
R = V / I
R = 24 V / 1.5 A
R = 16 ohms
Therefore, the resistance of the appliance is 16 ohms.
is the positively charged particle has magnetic field around it self??? thanksss fo your help
Answer:
Electric field lines are generated on positive charges and terminate on negative ones. The field lines of an isolated charge are directly radially outward. The electric field is tangent to these lines. Magnetic field lines, in the case of a magnet, are generated at the north pole and terminate on a south pole.
A loudspeaker produces a musical sound by means of the oscillation of a diaphragm. On what does the loudness of produced sound depend ?
Answer:A loudspeaker produces a musical sound by means of the oscillation of a diaphragm. The loudness of sound produced depends upon Amplitude of vibration.
Explanation:
The loudness of a sound depends upon the amplitude of vibrations. A sound will be louder if the amplitude of vibration is greater but if it is smaller than sound will not be louder.
Now it is the vibration of a sound that determines it's amplitude. Amplitude signifies the maximum distance moved. It means the extent of vibration If is vibrations have more amplitude than sound will be louder but if the amplitude of vibrations is shorter than the sound will be softer.
The loudness of sound produced depend on the frequency of oscillation, the amplitude of oscillation, the kinetic energy of oscillation
Explanation:
Loudness of an instrument is proportional to its amplitude
The amplitude ,frequency of the sound wave will be a function of both the speed and the amplitude of the cone.( i.e. keep the amplitude constant and vary the kinetic energy of the oscillation of the speaker cone and the frequency will change. )
If you step slowly into a pool, the ripples you make are reasonably small, whereas if you take a running jump (i.e. high kinetic energy).
Where would you find the least dense water? at 1,000 m in the Antarctic Ocean ,at 200 m in the Arctic Ocean, at the surface of the Atlantic Ocean, below 1,000 m in the Pacific Ocean
Answer:
At the surface of the Atlantic Ocean
Explanation:
The atlantic ocean is a worm ocean and the surface has the least dense water. This is because the denser layer of water sinks, while the least dense floats.
The Atlantic Ocean stands out in the choices with warmer temperatures at depths. This results from the different flow dynamics in the semi-enclosed Mediterranean Sea.
Which amendment deals with state rights
Answer:
The Tenth Amendment
Explanation:
It supports states rights. it is apart of the "bill of rights". it expresses the federalism and state rights. It explains the the United states of Government is made this amendments to protect do the state rights. What people want.