Answer:
D
closer to the moon than to Earth because Earth has greater mass than the moon
Explanation:
Answer:
D
Explanation:
Obi Wan Kenobi is force pushing some bad guys into a forcefield. The bad guys (m= 300 kg) were originally at REST 5 meters away from the forcefield. It took them 0.5 seconds to hit the forcefield. How much force does Obi Wan apply?
Answer:
F = 12000 N = 12 KN
Explanation:
First we need to find the acceleration of the bad boys by using second equation of motion:
s = Vi t + (1/2)at²
where,
s = distance covered = 5 m
Vi = Initial Velocity = 0 m/s
t = time taken = 0.5 s
a = acceleration = ?
Therefore,
5 m = (0 m/s)(0.5 s) + (1/2)a(0.5 s)²
a = 2(5 m)/(0.5 s)²
a = 40 m/s²
Now, we calculate the force applied by Newton's Second Law:
F = ma
where,
F = force = ?
m = mass of bad guys = 300 kg
Therefore,
F = (300 kg)(40 m/s²)
F = 12000 N = 12 KN
Someone plz help I’ll give the right answer branliest
Answer:
the one that is clicked in the photo I think is right
if the pressure of each gas is increased at constant temperature until condensation occurs, which gas will condense at the lowest pressure? methane ethane
The gas that will condense at the lowest pressure is Ethane.
The given gases;
MethaneEthaneHow does condensation of gases occur?At constant temperature, condensation will occur at the lowest pressure for the gas with the strongest intermolecular force or interactions.
For nonpolar compounds, the intermolecular interactions are dominated by London dispersion forces.The given gases are nonpolar, and the London dispersion force is more dominant for the largest compound.The Ethane gas is the largest compound amongst the two compounds.Thus, the gas that will condense at the lowest pressure is Ethane.
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Force = 65 kg x 3 m/s =
What is the answer?
What units do you use for your end result?
Answer:
multiply 65kg and 3m/s^2
to get 195kgm/s
or 195N
wait is that 3m/s or 3m/s^2?
An object with a mass of 10kg accelerates 16 m/s2 when an unknown force is
applied to it. What is the amount of force?
160 N
9.8 m/s2
165.8 kg
1.6 N
Answer:
The answer is 160 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 10 × 16
We have the final answer as
160 NHope this helps you
Using the picture above, which ball has the greatest potential energy?
Ball 1 has the greatest amount of potential energy inside it because it has the maximum height among all the balls shown in the graph.
What is Potential energy?Potential energy is the stored energy which depends upon the relative position of various parts of a system. A spring has more potential energy when it is compressed or stretched due to external force.
Potential energy is not affected by the environment outside of the object or its system, such as the air or height. On the other hand, kinetic energy is the energy of an object or a system's particles in motion.
The potential energy of an object depends on the force acting on the two objects. For the gravitational force, the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity and h is the height in meters.
The object 1 has maximum height hence, it has greatest potential energy.
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The internet is based on this concept of using optical fibers to send information.
True or False?
Answer:
False
Explanation:
The internet uses various mediums (fibre optic being only one of the newer ones) to transfer information.
What happens to the gravitational force between two objects as the objects move closer together?
Answer:
The Gravity gets stronger
Explanation:
Newtons laws of motion.
name the instrument used to control current in an electric circuit.
Guys please help me
The instrument which is used to control current in an electric circuit is rheostat.
Hope this helps :)
Answer:
or bhai kya haal h
hum bhi india se hi h
why does the moon look red during a lunar eclipse?
Answer:
Explanation:
blb
Nuclear energy is currently used in which three kinds of vehicles?
A. cars, submarines, spacecraft
B. submarines, ships, spacecraft
C. spacecraft, airplanes, cars
D. airplanes, submarines, ships
Answer:
d
Explanation:
Which item has the most thermal energy?
Answer:
A
Explanation: The hotter things get the more thermal energy they have
Also don't ever take pictures like this again
Answer:A
Explanation:
1 kg of boiling water is hot enough to melt a block of ice more quickly
explain the hall effect
Answer: The Hall effect is the movement of charge carriers through a conductor towards a magnetic attraction. The Hall effect causes a measurable voltage differential across the conductor such that one side is positively charged and the other negatively.
Explanation:
Question 5 Marks: 1 In the rectangular furnace, the grates are arranged inChoose one answer. a. arches b. rectangles c. tiers d. circles
In a rectangular furnace, the grates are typically arranged in rectangular shapes. Grates are horizontal bars or grids that are used in a furnace for supporting the fuel, such as wood, coal, or other combustible materials, during combustion.
Grates are arranged in a rectangular pattern to provide structural support and allow for efficient burning of the fuel. The rectangular arrangement of grates allows for even distribution of heat and combustion air, facilitating the combustion process in the furnace. Grates in a furnace serve multiple purposes. They support the fuel, such as wood or coal, allowing it to burn evenly and efficiently. They also provide spaces or gaps between the bars, which allow for the passage of air, oxygen, and combustion gases. This helps to regulate the airflow and maintain proper combustion conditions within the furnace.
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How is the density of a fish controlled? how is the density of a submarine controlled?
The density of a fish is controlled by the expansion and contraction of its air sacs while the density of a submarine is controlled by ballast tanks. It was emphasized earlier that buoyant forces does not equal an objects weight but does equal the weight of displaced water.
What are mass, density, and volume ?The three most fundamental characteristics of an object are mass, volume, and density. Volume indicates something's size, mass indicates how heavy it is, and density is calculated as mass divided by volume. Although you deal with mass and volume on a daily basis, the concept of density is less clear-cut and requires careful consideration.
Mass divided by density equals volume; and. Volume times density equals mass. A liquid's density is a gauge of how heavy it is relative to the amount being measured. The liquid that weighs heavier is more dense if you weigh two liquids with similar volumes or amounts.
The relationship between a substance's mass and the amount of space it occupies is known as its density (volume). The density of a substance is determined by the mass, size, and arrangement of its atoms.
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Consider the following hypothetical reactions:
A→BΔH=+25kJ
B→CΔH=+58kJ
You may want to reference (Pages 184 - 186) Section 5.6 while completing this problem.
Part A
Use Hess's law to calculate the enthalpy change for the reaction A→C.
Express your answer using two significant figures.
The enthalpy change for the reaction A → C is +83 kJ.
We can add the enthalpy changes for the individual reactions to obtain the enthalpy change for the overall reaction:
A → B ΔH = +25 kJ
B → C ΔH = +58 kJ
A → C ΔH = (A → B ΔH) + (B → C ΔH)
A → C ΔH = +25 kJ + (+58 kJ)
A → C ΔH = +83 kJ
Enthalpy is a fundamental concept in thermodynamics that refers to the total energy of a system. It is defined as the sum of the internal energy of the system and the product of its pressure and volume. Enthalpy is represented by the symbol H and is often used to describe the heat content of a substance at constant pressure.
Enthalpy plays a critical role in chemical reactions as it provides information on the amount of heat that is released or absorbed during a reaction. When a chemical reaction occurs at constant pressure, the change in enthalpy (ΔH) can be used to determine whether the reaction is exothermic (releases heat) or endothermic (absorbs heat). Enthalpy is measured in units of joules (J) or kilojoules per mole (kJ/mol). It is also commonly expressed in terms of enthalpy changes (ΔH), which can be calculated by subtracting the initial enthalpy from the final enthalpy of a system.
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The enthalpy change for the reaction A → C is +83 kJ.
We can add the enthalpy changes for the individual reactions to obtain the enthalpy change for the overall reaction:
A → B ΔH = +25 kJ
B → C ΔH = +58 kJ
A → C ΔH = (A → B ΔH) + (B → C ΔH)
A → C ΔH = +25 kJ + (+58 kJ)
A → C ΔH = +83 kJ
Enthalpy is a fundamental concept in thermodynamics that refers to the total energy of a system. It is defined as the sum of the internal energy of the system and the product of its pressure and volume. Enthalpy is represented by the symbol H and is often used to describe the heat content of a substance at constant pressure.
Enthalpy plays a critical role in chemical reactions as it provides information on the amount of heat that is released or absorbed during a reaction. When a chemical reaction occurs at constant pressure, the change in enthalpy (ΔH) can be used to determine whether the reaction is exothermic (releases heat) or endothermic (absorbs heat). Enthalpy is measured in units of joules (J) or kilojoules per mole (kJ/mol). It is also commonly expressed in terms of enthalpy changes (ΔH), which can be calculated by subtracting the initial enthalpy from the final enthalpy of a system.
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If the electric force between two charges is 4.2 × 10-2 N, what would the new force be if the distance between the charges is doubled and the charge on one of the charges is tripled?
Answer:
New force = 0.063 N
Explanation:
Given that,
The electric force between two charges is\(4.2\times 10^{-2}\ N\)
The formula for the electric force is:
\(F=\dfrac{kq_1q_2}{r^2}\)
If the distance between the charges is doubled, r' = 2r and one of the charges is tripled, q₁' = 2q₁, q₂' = 3q₂
Put all the values,
\(F'=\dfrac{kq_1'q_2'}{r'^2}\\\\\dfrac{F}{F'}=\dfrac{\dfrac{kq_1q_2}{r^2}}{\dfrac{kq_1'q_2'}{r'^2}}\\\\\dfrac{F}{F'}=\dfrac{\dfrac{q_1\times q_2}{r^2}}{\dfrac{2q_1\times 3q_2}{(2r)^2}}\\\\\dfrac{F}{F'}=\dfrac{4}{6}=\dfrac{2}{3}\\\\F'=\dfrac{3\times 4.2\times 10^{-2}}{2}\\\\F'=0.063\ N\)
So, the new force is 0.063 N.
Answer:
The force becomes 0.0315 N.
Explanation:
Force, F = 4.2 x 10^-2 N
When the distance is doubled, a charge is tripled, Let the force is F'.
The force between the two charges is
\(F = \frac{K qq'}{r^2}\\\)
when, q' = 3 q' and r is 2 r so
\(F' = \frac{K 3qq'}{4r^2} = \frac{3 F}{4} = \frac {3\times 4.2\times 10^{-2}}{4}=0.0315 N\)
Oven mitts reduce which type of thermal energy transfer when you take a hot
pan out of an oven?
A. Conduction
B. Translation
C. Convection
D. Radiation
Answer:
A) Conduction
Explanation:
The mitt keeps the heat from reaching your hand through conduction
Answer: A.conduction
Explanation: i got it right on my test!
The amount of energy needed to a power a 0. 20kw bulb for one minute would be just sufficient to lift a 2. 5 kg object through a vertical distance of
The amount of energy needed to power a 0.20 kW bulb for one minute would be just sufficient to lift a 2.5 kg object through a vertical distance of approximately 0.49 meters.
To determine the amount of energy needed to power a 0.20 kW bulb for one minute, we first need to calculate the total energy consumption.
The power (P) of the bulb is given as 0.20 kW (0.20 kilowatts). Since power is defined as energy per unit time, we can calculate the energy consumption using the formula:
Energy (E) = Power (P) * Time (t)
Converting the time to seconds (since power is given in kilowatts):
Time (t) = 1 minute = 60 seconds
Substituting the values into the formula:
Energy (E) = 0.20 kW * 60 s
Energy (E) = 12 kilojoules (kJ)
Therefore, the amount of energy needed to power the 0.20 kW bulb for one minute is 12 kJ.
To determine the vertical distance through which a 2.5 kg object could be lifted using this energy, we can use the formula for potential energy:
Potential energy (PE) = m * g * h
Where m is the mass of the object, g is the acceleration due to gravity, and h is the vertical distance.
Rearranging the formula to solve for h:
h = PE / (m * g)
Given that the mass of the object (m) is 2.5 kg and the acceleration due to gravity (g) is approximately 9.8 m/s²:
h = 12 kJ / (2.5 kg * 9.8 m/s²)
h = 0.49 meters (rounded to two decimal places)
Therefore, the amount of energy needed to power a 0.20 kW bulb for one minute would be just sufficient to lift a 2.5 kg object through a vertical distance of approximately 0.49 meters.
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Once you have completed a correct water cycle, include a paragraph summary of the process, and how certain steps of the process may affect you.Write your answer in the essay box below.(basically explain the water cycle keep it simple pls thx)
Answer:
water process?
Explanation:
Always wash your hands, hand washing skills. By the way you spelt thanks* improperly.
State government approves a series of grants to fund job training. Which of the following is a negative externality? (5 points
Businesses would not necessarily increase hiring rates.
Economic recession would result in a backlog of applicants.
Money for conservation efforts would be eliminated.
The state would have to provide child care for parents in training.
None of the options listed is a negative externality. A negative externality is an unintended consequence of an economic activity that affects a third party who is not directly involved in the activity.
If I were to choose: Businesses would not necessarily increase hiring rates.
This could be considered a negative externality because the grant funding is intended to fund job training in order to increase employment opportunities, but if businesses do not increase their hiring rates despite having a pool of trained workers, then the intended benefit of the grant may not be fully realized. This could result in a loss of resources and a missed opportunity to address unemployment in the community.
A Truck is traveling at 40 m/s and sounding a siren with 800 Hz when approaching to a car heading towards truck with speed of 1000 cm/s. At what frequency does the driver of the car hear the siren? (Assume a temperature of 20° C and the speed of sound wave in air at this temnerature is 343 m/s)
The driver of the car hears the sound of the siren at a frequency of approximately 932.34 Hz.
The frequency at which the driver of the car hears the siren can be calculated using the Doppler effect formula:
f' = f * (v + vo) / (v + vs)
Where:
- f' is the observed frequency (the frequency heard by the driver)
- f is the source frequency (800 Hz in this case)
- v is the speed of sound in the medium (343 m/s at 20°C)
- vo is the speed of the observer (the car) relative to the medium (1000 cm/s, which should be converted to m/s)
- vs is the speed of the source (the truck) relative to the medium (40 m/s)
First, convert the car's speed from cm/s to m/s:
1000 cm/s * (1 m/100 cm) = 10 m/s
Next, plug the values into the Doppler effect formula:
f' = 800 Hz * (343 m/s + 10 m/s) / (343 m/s - 40 m/s)
f' = 800 Hz * (353 m/s) / (303 m/s)
f' ≈ 932.34 Hz
So, the driver of the car hears the siren at a frequency of approximately 932.34 Hz.
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what are the two main observational problems with the original big bang theory of the universe
The first law of thermodynamics, which states that you cannot produce or destroy matter or energy, is broken by this. Critics assert that the big bang theory implies the universe didn't exist before the big bang.
According to a theoretical hypothesis known as the Big Bang theory, the cosmos first existed in a state of extreme density and heat. The evolution of the observable universe from the earliest known times through its later large-scale form is explained by a variety of cosmological models of the Big Bang. These models provide a thorough justification for a wide variety of known phenomena, including the abundance of light elements, cosmic microwave background (CMB) radiation, and large-scale structure. Cosmic inflation, or the abrupt and extremely rapid expansion of space during the Universe's early moments, provides an explanation for the flatness problem, or the appearance of uniformity over the whole cosmos. The initial conditions of the Big Bang, however, are not currently well modeled by any commonly accepted quantum gravity theory.
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A 55.0-kg person consumes a small order of french fries
(241.0 Cal)
and
wishes to
"work off"
the
energy by climbing a
11.0 m
stairway.
How many vertical climbs are needed to use all the
energy?
To use all the energy from consuming a small order of french fries, the person would need to climb the 11.0 m stairway approximately 17.0 times.
The energy content of the small order of french fries is given as 241.0 Cal. We can convert this value to joules since the unit of energy in the metric system is the joule (J). 1 calorie (Cal) is equal to 4.184 joules (J). To use all the energy from consuming a small order of french fries, the person would need to climb the 11.0 m stairway approximately 57 times.
Energy content of the small order of french fries:
241.0 Cal × 4.184 J/Cal = 1007.144 J
Work done to climb the stairway:
(55.0 kg) × (11.0 m) × (9.8 m/s²) = 59294 J
Number of climbs needed to use all the energy:
1007.144 J ÷ 59294 J ≈ 17.0
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A ramp with a mechanical advantage of eight lifts objects to a height of 1.5 meters. How long it the ramp?
i will give 15points for help!!
Answer:
12 m
Explanation:
Given data:
M.A. = 8 (No units),
Ramp height (h)= 1.5 m, lifted,
Determine how long is the ramp=?
General formula
Mechanical Advantage = (Ramp length) ÷ (Ramp height),
M.A = l ÷ h
8 × 1.5 = l = 12 m long
length of the ramp l ramp = 12 m
Jupiter and the other jovian planets are noticeably oblate because.
Answer:
they are gas giants. they are much much more bigger then terrestrial
An incompressible fluid flows irrotationally through a tube of circular crosssection that has greater diameter at one end than the other. What conclusion can you reach about the speed of the fluid at the ends of the tube?.
The flow rate must be slower at the larger diameter end.
What is speed in physics?The rate and direction of an object's movement are referred to as its velocity, while its speed is the time rate at which it moves along a path. Speed, on the other hand, is a scalar, while velocity is a vector.
In physical science, what is speed and what is its unit?Speed is defined as the rate at which distance changes over time. Time intervals are used to measure distance. The SI unit of speed is the sum of the fundamental units of time and distance. Consequently, the SI unit for speed is meters per second.
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a car traveling down a hill at a speed of 30.0 m/s encounters an emergency and comes to : complete stop. how much time will it take for the car to stop if it accelerates at -4.0 m/s2?
The time it takes for a car to stop can be calculated using the equation:
v = at
Where:
v = final velocity (m/s)
a = acceleration (m/s^2)
t = time (s)
Given that the car starts at a velocity of 30 m/s and decelerates at -4 m/s^2, we can use this equation to find the time it takes for the car to stop. Since the final velocity is 0 m/s, we can set v = 0 and solve for t:
0 = 30 + (-4)t
t = v/a
t = 30/-4
t = 7.5 s
So it will take 7.5 seconds for the car to come to a complete stop while accelerating at -4 m/s^2
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An event occurs in system K’ at x’ = 2 m, y’ = 3.5 m, z’= 3.5 m, and t’= 0. System K’ and K have their axes coincident at t = t’= 0, and system K’ travels along the x axis of system K with a speed 0.8c. What are the coordinates of the event in system K?
The coordinates of the event in system K can be found using the Lorentz transformation equations, and they are (10/3 m, 3.5 m, 3.5 m, 8/3 m/c).
The Lorentz transformation equations relate the coordinates of an event in one reference frame to the coordinates of the same event in another reference frame that is moving with a constant velocity relative to the first reference frame.
The equations are as follows:
x = γ(x' + vt')
y = y'
z = z'
t = γ(t' + vx'/c^2)
Where γ is the Lorentz factor, which is given by:
γ = 1/√(1-v^2/c^2)
In this case, v = 0.8c, so γ = 1/√(1-(0.8c)^2/c^2) = 5/3.
Plugging in the values for x', y', z', t', v, and γ into the Lorentz transformation equations, we get:
x = (5/3)(2 m + (0.8c)(0)) = 10/3 m
y = 3.5 m
z = 3.5 m
t = (5/3)(0 + (0.8c)(2 m)/c^2) = 8/3 m/c
Therefore, the coordinates of the event in system K are (10/3 m, 3.5 m, 3.5 m, 8/3 m/c).
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Some reference for Pv cells and switch over or change over
PV cells are devices that convert sunlight into electricity, enabling the use of solar power. The switch over or change over to PV cells involves transitioning from conventional grid electricity to utilizing solar energy, offering environmental and economic benefits.
Photovoltaic (PV) cells, also known as solar cells, are devices that convert sunlight directly into electricity. They are made of semiconducting materials, such as silicon, that absorb photons from sunlight and release electrons, generating an electric current. PV cells are a key technology in solar power systems, enabling the conversion of solar energy into usable electrical energy.
Switch over or change over, in the context of PV cells, refers to the process of transitioning from using conventional grid electricity to relying on solar power generated by PV cells. This switch can involve installing PV panels on rooftops or in other suitable locations, connecting them to an inverter to convert the DC electricity produced by the PV cells into AC electricity compatible with household or commercial electrical systems.
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