Answers
the work done done by that person is less than zero
Related Questions
Currently, accepted theories DO NOT predict single existing particles having electrical charge equal *
a.half elementary charge
b.one elementary charge
c.two elementary charges
d.zero elementary charge
Answers
Answer
A. Half elementary charge
Explanation:
When a baseball hits a
baseball glove, what is the
reaction force?
A. The ball pushes onto the glove.
B. The glove pushes against the ball.
C. The ball falls to the ground.
at for every
reaction.
all at the
his glove.
Answers
Hope that helps :)
You hold your physics textbook in your hand. (Assume that no other objects are in contact with the book.)
a. Identify the forces acting on the book.
1. book on hand
2. hand on book
3. floor on book
4. earth on book
b. For each force you identified in part (a), indicate the direction. (If a force is not applicable, choose NA.)
1, book on hand __________
2. hand on book __________
3. floor on book __________
4. earth on book _________
Answers
Answer:
a) Please see below as the answer is self-explanatory.
b) 1. vertically downward
2. vertically upward
3 N/A
4 vertically downward.
Explanation:
a)
If the book is hold by the hand, this means (according to Newton's third law) that both exert a force on each other, equal and opposite.In this case this pair is formed by normal forces, the normal force (upward) that the hand does on the book (avoiding it to be accelerated downward) and the normal force that the book does on the hand (downward) avoiding it to be accelerated in the upward direction.The other force that acts on the book is the one due to gravity, and is always downward, which is numerically equal to the normal force that the hand does on the book, due to the book is at rest. There is no interaction between the book and the floor, so there is no force between them, neglecting the gravitational attraction between their masses.Identify equivalent terms for stored energy and energy of motion.
a. Stored energy is potential energy, and energy of motion is kinetic energy.
b. Energy of motion is potential energy, and stored energy is kinetic energy.
c. Stored energy is the potential as well as the kinetic energy of the system.
d. Energy of motion is the potential as well as the kinetic energy of the system.
Answers
Answer:
a. Stored energy is potential energy, and energy of motion is kinetic energy
Explanation:
The correct option is - a. Stored energy is potential energy, and energy of motion is kinetic energy.
Reason -
Potential energy is stored energy, whereas kinetic energy is the energy of moving things.
Kinetic energy is energy possessed by an object in motion.The energy associated with position is called potential energy .the moon's mass is ____?
Answers
Answer:
i hope this is helpful
Explanation:
7.34767309 × 1022 kilograms
Answer:
Hellooo
7.35 x 1022 kg
The moon's mass is 7.35 x 1022 kg, about 1.2 percent of Earth's mass. Put another way, Earth weighs 81 times more than the moon.
Explanation:
thanks
g Drop the object again and carefully observe its motion after it hits the ground (it should bounce). (Consider only the first bounce and do NOT assume the total energy is the same as the total energy of the object before it hits the ground.) a. List the quantities that you need to know to determine the total energy of the object after it hits the ground. b. Record your measurements and describe how you measured them. c. Calculate the total energy of the object after it hit the ground. Your final answer: ______________ d. Determine whether or not the object’s energy was conserved when it hit the ground. If it was not conserved, explain where the energy went.
Answers
Answer:
a) quantity to be measured is the height to which the body rises
b) weighing the body , rule or fixed tape measure
c) Em₁ = m g h
d) deformation of the body or it is transformed into heat during the crash
Explanation:
In this exercise of falling and rebounding a body, we must know the speed of the body when it reaches the ground, which can be calculated using the conservation of energy, since the height where it was released is known.
a) What quantities must you know to calculate the energy after the bounce?
The quantity to be measured is the height to which the body rises, we assume negligible air resistance.
So let's use the conservation of energy
starting point. Soil
Em₀ = K = ½ m v²
final point. Higher
Em_f = U = mg h
Em₀ = Em_f
Em₀ = m g h₀
b) to have the measurements, we begin by weighing the body and calculating its mass, the height was measured with a rule or fixed tape measure and seeing how far the body rises.
c) We use conservation of energy
starting point. Soil
Em₁ = K = ½ m v²
final point. Higher
Em_f = U = mg h
Em₁ = Em_f
Em₁ = m g h
d) to determine if the energy is conserved, the arrival energy and the output energy must be compared.
There are two possibilities.
* that have been equal therefore energy is conserved
* that have been different (most likely) therefore the energy of the rebound is less than the initial energy, it cannot be stored in the possible deformation of the body or it is transformed into heat during the crash
Two coils of wire are placed close together. Initially, a current of 3.03 A exists in one of the coils, but there is no current in the other. The current is then switched off in a time of 3.03 x 10-2 s. During this time, the average emf induced in the other coil is 4.13 V. What is the mutual inductance of the two-coil system
Answers
Answer:
4.13 ×10^-2 H
Explanation:
mutual inductance of the two-coil system can be calculated using below expression
mutual inductance = (- E Δt)/ ΔIp
Where E= average emf induced
Δt= time
ΔIp= change in current
ΔIp=( 0s - 3.03 A)
Δt=3.03 x 10-2 s.
If we substitute the values into above expresion, we have,
E= 4.13 V.
mutual inductance = (- E Δt)/ ΔIp
= - (4.13 V × 3.03 x 10^-2 s.)/ ( 0s - 3.03 A)
= 4.13 ×10^-2 H
Hence, the mutual inductance of the two-coil system is 4.13 ×10^-2 H
Alternate current
Hello!
I need solve 2 questions, I tried but im so bad at physics :(
1. If the frequency in the network is 50Hz, what is the period of this voltage?
2. The effective voltage value in the network is 230V. What is its maximum value?
I would like an explanation with a calculation for my understanding!!
Thanks in advance you all!
Answers
sorry bro but i don't know his i am also bad
Explanation:
but maybe you can you the formula of volatage as well as
Which of the following technologies would produce the least energy in light
waves?
A. Ultraviolet disinfecting wand
B. Microwave industrial drying equipment
C. Radio-controlled toy airplane
D. Halogen lightbulb
Answers
Answer: C. Radio-controlled toy airplane
Explanation:
Just did the quiz
Radio-controlled toy airplane technologies would produce the least energy in light waves. Hence option C is correct.
Energy of the electromagnetic wave is directly proportional to frequency of the light wave. This relation is given by, E =hυ where h is planks constant and υ is frequency of light wave.
Remote of the radio controlled toy airplane produces radio waves to communicate between remote and the plane. Radio wave have high wavelength and low frequency, hence it has least energy as compare to UV light and and microwave light. Ultraviolet disinfecting wand produces ultraviolet light whose frequency is high than the microwave and radio waves.
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Four blocks, each with the same volume, are submerged in a vat of oil. Which of the blocks will have have the largest buoyant force?
A: .5 kg styrofoam block
B: 5 kg lead block
C: 2 kg aluminum block
D: 4 kg steel block
E: All have the same buoyant force
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on which principle thermometer is based?
Answers
Answer:
Thermal Expansion
Explanation:
These liquid thermometers are based on the principal of thermal expansion. When a substance gets hotter, it expands to a greater volume. Nearly all substances exhibit this behavior of thermal expansion. It is the basis of the design and operation of thermometers.
Jorge wants to know if yearly income and amount of tax returns are related in any way. In looking for an association between
these two variables, Jorge should utilize the method of research.
a. Correlational
b. Ethnographer
c. Naturalistic observation
d. Case study
Answers
We have that In looking for an association between these two variables, Jorge should utilize the
Correlational Research
This a research method that focuses on two variant variable and uses statistics to analyse the to achieve desired result
From The options we have that
a Correlational Research
This a research method that focuses on two variant variable and uses statistics to analyse the to achieve desired result
b. Ethnographer Research
This is simply the a Research method that focuses on variable mostly people in the Natural habitat and studies them or conversations with them for best results
c. Naturalistic observation Research
This method of research focuses on people in the Natural environment to determine their mental State .It is use mostly by Psychologists
d. Case study Research
This is is the use of real life testimonies to develop results to a particular Research it entails the study of Past events.
In conclusion the different variables
Having understood the different methods
In looking for an association between these two variables, Jorge should utilize the
Correlational Research
This a research method that focuses on two variant variable and uses statistics to analyse the to achieve desired result
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Rank the following circuits in order from highest to lowest values of the current in the circuit.
i. a 1.4-Ω resistor connected to a 1.5-V battery that has an internal resistance of 0.10 Ω;
ii. a 1.8-Ω resistor connected to a 4.0-V battery that has a terminal voltage of 3.6 V but an unknown internal resistance;
iii. an unknown resistor connected to a 12.0-V battery that has an internal resistance of 0.20 Ω and a terminal voltage of 11.0 V.
a. (i), (iii), (ii)
b. (iii), (i), (ii)
c. (ii), (iii), (i)
d. (i), (ii), (iii)
e. (iii), (ii), (i)
f. (ii), (i), (iii)
Answers
Answer:
e)
Explanation:
Let's get first the values of the currents for the three cases.i)
The battery forms a series circuit with its internal resistance and the 1.4 Ω resistor. Since the current is the same at any point of the circuit, and the sum of all voltages along a closed circuit must be zero, we can apply Ohm's Law in each resistor, as follows:[tex]V = I*r_{i} + I*R_{1} (1)[/tex]
Replacing V, ri and R₁ by their values, we can solve for the current I as follows:[tex]I_{i} = \frac{V}{r_{int} + R_{i}} = \frac{1.5V}{0.1 \Omega + 1.4 \Omega} = 1.0 A (2)[/tex]
ii)
Since the voltage of the battery is 4.0 V (open circuit voltage), and it falls to 3.6 V when is connected to a 1.8Ω resistor, this means that the voltage through the resistor must be 3.6 V, due to the sum of all voltages along a closed circuit must be zero.So, we can find the current through the circuit, applying Ohm's Law to the 1.8Ω resistor, as follows:[tex]I_{ii} =\frac{V_{term} }{R_{ii} } =\frac{3.6V}{1.8 \Omega} = 2.0 A (3)[/tex]
iii)
Since the 12.0 V battery has a terminal voltage of 11.0 , this means that the voltage through the internal resistance of 0.2 Ω, must be 1.0 V.So we can find the current Iiii, applying Ohm's Law to the internal resistance value, as follows:[tex]I_{iii} =\frac{V-V_{term}}{r_{int} } =\frac{12.0 V- 11.0 V}{0.2 \Omega} =\frac{1.0V}{0.2\Omega} = 5.0 A (4)[/tex]
So, the highest current is the Iiii, followed by Iii and Ii, which is stated by e).PLEASE HELP ME WITH THIS ONE QUESTION
1000 J of energy is given to a balloon via a heating device. Assuming the pressure is a constant 101,325 Pa, what is the final volume of the balloon, assuming it started at 0.001 m3?
Answers
Answer:
Vf = 0.0108 m³
Explanation:
Assuming there is no change in internal energy, we can calculate the changed volume by the following formula:
[tex]Energy\ Supplied = Work = W = P \Delta V \\W = P(V_{f}-V_{i})\\[/tex]
where,
W = Work = Energy Supplied = 1000 J
P = Pressure = 101325 Pa
Vf = Final Volume = ?
Vi = Initial Volume = 0.001 m³
Therefore,
[tex]1000\ J = (101325\ Pa)(V_{f}-0.001\ m^3)\\\\V_{f}-0.001\ m^3 = \frac{1000\ J}{101325\ Pa}\\\\V_{f} = 0.001\ m^3 + 0.0099\ m^3[/tex]
Vf = 0.0108 m³
Any magnet has two ends, each one called a(n)
Answers
what the importance of paying orbit to the earth.
Answers
Answer:
The what?
Explanation:
8.A catcher puts out his mitt and catches the BASEBALL BALL. Is the work
done on the BASEBALL BALL positive or negative?
O a. positivie
O b. negative
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Answer:
The catcher does negative work on the ball because the force exerted by the catcher is opposite in direction to the motion of the ball.
Explanation:
When will heat STOP flowing
between two objects?
A. When one object is significantly
warmer than the other
B. When one object is significantly cooler
than the other
C. Never
D. When both objects reach the same
temperature
Answers
Answer: D. When both objects reach the same temperature.
Explanation: When will heat flow between the objects stop? Heat will always flow from the warmer object to the colder object. The heat transfer will stop when the two objects are at the same temperature and reach thermal equilibrium.
Answer: Heat will always flow from the warmer object to the colder object. The heat transfer will stop when the two objects are at the same temperature and reach thermal equilibrium.
so the answer to your question is c
Explanation:
define prism and itz colo
Answers
Answer:
A prism is a piece of glass or plastic in the shape of a triangle.
Explanation:
The colors of the rainbow in order are: red, orange, yellow, green, blue, indigo, and violet.
finger bones do not have joints true or false
Answers
Explanation:
Finger bones have joints.
Answer: true , finger bones have joints
Explanation:
write the type of energy present in pond water and kerosene?
Answers
The energy present in pond water and kerosene are potential energy and chemical energy respectively.
What is energy?Energy is a quantifiable quantity in physics that can be transferred from an item to do work. Thus, we might characterise energy as the capacity to engage in any kind of physical action. So, to put it simply, we can define energy as: Energy is the capacity to carry out work.
Energy "can neither be created nor destroyed but can only be changed from one form to another," according to the rules of conservation of energy. The SI unit for energy is called a joule.
In pond, water is stored during rain and stored potential energy whereas in kerosene, carbon molecules have chemical energy and when it burns, chemical energy revels as thermal energy.
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Which letter on the map represents the
Southern Ocean
Answers
Answer:
B cus is in the south but that pfp tho
A 1,250 kg car is moving due to 6,500 N engine force. If the kinetic friction coefficient between the car and the road is 0.32, what is the car's acceleration?
A) 32m/s²
B) 200m/s²
C) 50m/s²
D) 2m/s²
Answer and I will give you brainiliest
Answers
Answer:
b i hope this is correct answee
ANSWER DIS ASAP FOR LUCK TMRW :}
List down ten situations that show how friction affects the movement of objects. I NEED THE ANSWER IN ONE MINUTE
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Answer:
Walking –We can walk only if we apply frictional force. Friction is what holds your shoe to the ground. The friction present on the ice is very little, this is the reason why it is hard to walk on the slippery surface of the ice.
Writing – A frictional force is created when the tip of the pen comes in contact with the surface of the paper. Rolling friction is what comes into play while writing with a ballpoint pen while sliding friction arises when one writes with a pencil.
Skating – A thin film of water under the blade is necessary to make the skate slide. The heat generated by the skate blade rubbing against the surface of ice causes some of the ice to melt right below the blade where the skater glides over the ice. This water acts as a lubricant reducing friction.
Lighting a matchstick – When the head of the matchstick is rubbed against a rough surface, heat is generated and this heat converts red phosphorous to white phosphorous. White phosphorous is highly inflammable and the match stick ignites. Sometimes, matchsticks fail to ignite due to the presence of water. Water lowers friction.
Driving of the vehicle on a surface- While driving a vehicle, the engine generates a force on the driving wheels. This force initiates the vehicle to move forwards. Friction is the force that opposes the tyre rubber from sliding on the road surface. This friction avoids skidding of vehicles.
Applications of breaks in the vehicle to stop it- Friction braking is the most widely used braking method in vehicles. This process involves the conversion of kinetic energy to thermal energy by applying friction to the moving parts of a vehicle. The friction force resists the motion and in turn, generates heat. This conversion of energy eventually bringing the velocity to zero.
Flight of aeroplanes- Drag is the force that opposes the forward motion of the aeroplane. The friction which resists the motion of an object moving through a fluid or immobile in a moving fluid, as occurs when we fly a kite. The friction of the air is created as it meets and passes over an aeroplane and its components. Drag is generated by air impact force, skin friction and displacement of the air.
Drilling a nail into the wall- Friction is responsible for fixing of nails in a wall. As the nail is driven into the wall, the nearby material to the nail of the wall gets compressed. This exerts a force on the nail. This force is the friction that converts the normal force exerted by the compressed layers of the wall into the resisting shear force. In this manner the friction cause nails and screws to hold on to walls.
The dusting of the carpet by beating it with a stick- When the carpet is beaten with the stick, the dust comes out. The dust is carried off by the wind or falls on the floor. The carpet exhibits a little static friction that holds the dust to the carpet. When the carpet is beaten, it will overcome the friction and the carpet will move away from the dust making the carpet free from dust.
Sliding on a garden slide- We know that friction is a force that is present whenever two objects rub against each other. In case of a slide in the garden such as a slide and a person’s backside rub each other’s surface. Without friction, a slide would accelerate the rider too quickly, resulting in possible injury due to the fall. The friction reduces the velocity of the sliding person and makes him stop.
Hope that helps! :D Sorry if it's too lengthy...
Explanation:
The force of friction depends upon
Answers
Answer:
ask internet?
Explanation:
easy .....
..
Therefore, friction depends on the smoothness or roughness of the two surfaces which are in contact.
Water is kept in a vessel at a temperature of 100°C. What would happen if a metal ball having a temperature of 30°C is dropped in it? Mention the direction of the heat flow.
Answers
Answer:
there will be a heat flow from water to the metal ball...
PLEASE HELP ME WITH THIS ONE QUESTION
A mass on a spring oscillates with a frequency of 0.1 Hz. The mass is 10 kg. What is the spring constant of the spring?
Answers
The frequency of oscillation of a mass on a spring is given by the equation:
[tex]f = 1 / (2π) * sqrt(k / m)[/tex]
[tex]k = (1 / (2π)^2 ) * (0.1^2) * 10 kg[/tex]
[tex]k = 0.158 N/m[/tex]
The spring constant of the spring is 0.158 N/m.
What is a spring constant?The spring constant, also known as the spring rate or rate constant, is a measure of the stiffness of a spring. It represents the amount of force (in newtons) required to compress or stretch a spring a certain distance (in meters) from its equilibrium position. The spring constant is a proportionality constant that relates the force applied to a spring to the resulting displacement.
The spring constant is an important property of a spring because it determines how much force is required to compress or stretch the spring a certain distance. A spring with a higher spring constant will be stiffer, and will require more force to compress or stretch it a certain distance, while a spring with a lower spring constant will be more flexible and will require less force to compress or stretch it a similar distance.
It is represented by the letter 'k', the unit of spring constant is N/m (Newton per meter). The greater the spring constant, the stiffer the spring is, and the less it will deflect for a given force.
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That other answer is untrustworthy. It's probably a POS troll.
The real answer: 4 N/m
A concert loudspeaker suspended high off the ground emits 33.0 W of sound power. A small microphone with a 0.600 cm2 area is 52.0 m from the speaker. What is the sound intensity at the position of the microphone
Answers
Answer:
The sound intensity at the position of the microphone is [tex]9.71\times10^{-4} W/m^{2}[/tex]
Explanation
Sound intensity is given by the formula
[tex]I=\frac{P}{A}[/tex]
Where [tex]I[/tex] is the sound intensity, [tex]P[/tex] is the power and [tex]A[/tex] is the area.
Since the loudspeaker radiates sound in all directions, we have a spherical sound wave where the radius r is the distance of the microphone from the speaker.
∴ [tex]A[/tex] is given by [tex]4\pi r^{2}[/tex] where [tex]r[/tex] is the radius
From the question, [tex]P[/tex] = 33.0W, [tex]r[/tex] = 52.0m
[tex]I=\frac{P}{A} = \frac{P}{4\pi r^{2} }[/tex]
[tex]I = \frac{33.0}{4\pi \times (52.0)^{2} }[/tex]
∴ [tex]I = 9.71\times10^{-4} W/m^{2}[/tex]
Hence, the sound intensity at the position of the microphone is 9.71 × 10⁻⁴ W/m²
Consider the following water circuit: water is continually pumped to high pressure by a pump, and then funnelled into a pipe that has lower pressure at its far end (else the water would not flow through the pipe) and back to the pump. Two such circuits are identical, except for one difference: the pipes in one circuit have a larger diameter than the pipes in the other circuit. Through which circuit is the flow of water greater
Answers
Answer:
The circuit with the larger diameter pipes will have higher water flow.
Explanation:
The flow rate can be calculated with this formula, [tex]Q = v.A[/tex] , where [tex]v[/tex] is the velocity of the water flow and [tex]A[/tex] is the cross-sectional area of the pipe. Considering the two circuits are identical except only for the diameter of the pipes, the flow of water will be greater through the circuit with the larger diameter pipes. It will be proportional with respect to the square of the pipe's diameter.
I hope this answer helps.
[1 mark]
29. A ball rolls at a constant speed of 3.0 m/s for 8.0 seconds. How far does it roll in this time!
A. 2.7 m
B. 3.0 m
C. 8.0 m
D. 24.0 m
Please help me
Answers
Answer:
D. 24.0m
Explanation:
formula
S=d/t
s=speed
d=distance
t=time
s=3.0m/s
d=x
t=8.0s
s=d/t
d=s*t
d=3.0*8.0
d=24.0m
S=ut+1/2a(t^2)
s=3(8) + 0
s=24m
Answer is D)24m