Answers
Answer:
b I think. sorry if it's wrong
Related Questions
which parameter is multiplied by your mass to calculate your weight on another planet?
Answers
The acceleration due to gravity on another planet is multiplied by your mass to calculate your weight on that planet. The acceleration due to gravity is different on each planet, so your weight will also be different. For example, the acceleration due to gravity on Earth is 9.8 m/s², while the acceleration due to gravity on Mars is 3.711 m/s². This means that if you weigh 100 pounds on Earth, you would weigh only 37.11 pounds on Mars.
The formula for calculating your weight on another planet is:
Weight = Mass * Acceleration due to gravity
For example, if you weigh 100 pounds on Earth and you want to calculate your weight on Mars, you would use the following formula:
Weight on Mars = 100 pounds * 3.711 m/s²
Weight on Mars = 371.1 pounds
Therefore, your weight on Mars would be 371.1 pounds.
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hello I need help with this question. I started it but am confused
Answers
Given:
The mass on the table is,
\(m=1.0\text{ kg}\)The hanging mass is,
\(M=1.5\text{ kg}\)THe coefficient of friction is,
\(\mu=0.20\)let the acceleration of the whole system is a (for the hanging mass it is downward and for the mass on the table it is rightward). the tension towards The fixed point of the pulley is T.
we can write,
\(Mg-T=Ma\ldots.\ldots..\ldots\ldots.(1)\)\(ma=T-\mu mg\ldots.\ldots.\ldots..\ldots..(2)\)Adding these equations we get,
\(\begin{gathered} (M+\mu m)g=(M+m)a \\ a=\frac{(M+\mu m)g}{M+m} \end{gathered}\)Substituting the values we get,
\(\begin{gathered} a=\frac{(1.5+0.20\times1.0)9.8}{1.5+1.0} \\ =6.67m/s^2 \end{gathered}\)Hence the acceleration is 6.66 m/s^2.
According to the law of conservation of energy, A) an object loses most of its energy as friction. B) the total amount of energy for a system stays the same. C) the potential energy of an object is always greater than its kinetic energy. D) the kinetic energy of an object is always greater than its potential energy.
Answers
According to the law of conservation of energy, energy cannot be created or destroyed.
When work is done, energy is changed from one form to another.
Kinetic energy + Potential Energy = constantFrom this we can analyse and find out the answer is:
B) the total amount of energy for a system stays the same.
it is because energy is never destroyed or created. always stays same but in different forms.
which truth did isaac newton’s investigations of gravity explain? jupiter has more moons than earth. jupiter has more moons than earth. the sun is more massive than earth. the sun is more massive than earth. gravity acts on all objects in the universe. gravity acts on all objects in the universe. earth is not the center of the universe. earth is not the center of the universe.
Answers
Newton's investigations of gravity explain the truth that Jupiter has more moons than Earth.
The fact that Jupiter has more moons than Earth was first discovered by Galileo Galilei in 1610, and it was later confirmed by Newton. In addition to having more moons, it is also thought that Jupiter may be home to some of the most powerful magnetic fields in the solar system.
What was explained by Isaac Newton's law of gravity?Every particle in the cosmos attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers, according to Newton's law of universal gravitation.
Thus, the equation for universal gravity has the following structure:
\({\displaystyle F=G{\frac {m_{1}m_{2}}{r^{2}}}}{\displaystyle\)
where r is the distance between the centers of the two objects' masses, m1 and m2 are their respective masses, G is the gravitational constant, and F is the gravitational force acting between them.
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The correct answer is; Gravity acts on all objects in the universe.
The answer above is incorrect…
A pulse in spring L is moving to the right as shown in first diagram below. A short time later, a reflected pulse and a transmitted pulse will travel away from the junction and toward the walls. The transverse displacements of the springs have been exaggerated for clarity. Sketch the shape of the springs at an instant before the transmitted and reflected pulses reach the walls in the following cases:
(1) the wave speed in spring R is less than the wave speed in spring L, and
(2) the wave speed in spring R is greater than the wave speed in spring L. Your drawings should be qualitatively correct; however, you are not expected to show the correct relative amplitudes of the pulses.
Answers
A pulse going to the right in spring L, a pulse travelling to the left in spring L, and a transmitted pulse moving to the right in spring R may all be seen in the springs' form just before the transmitted and reflected pulses hit the walls. A transmitted pulse travelling to the right in spring R, and a pulse going to the left in spring L.
(1) If spring R's wave speed is slower than spring L's wave speed:
In this instance, part of the pulse is transferred to spring R and part of it is reflected back into spring L at the point where the two springs converge. The transmitted pulse in spring R will move more slowly than the initial pulse in spring L because the wave speed in spring R is lower than that in spring L. Although it will be moving backwards and to the left, the reflected pulse in spring L will have the same form as the incident pulse. The pulse that is delivered via spring R will follow the pulse that is reflected by spring L. as a result, the springs at a pulse travelling to the right in spring L, a pulse going to the left in spring L, and a transmitted pulse travelling to the right in spring R are all visible just before the transmitted and reflected pulses hit the walls.
(2) In the case when spring R's wave speed is higher than spring L's wave speed:
In this instance, part of the pulse is transferred to spring R and part of it is reflected back into spring L as it reaches the junction. The transmitted pulse in spring R will move more quickly than the initial pulse in spring L because the wave speed in spring R is higher than that in spring L. Although it will be moving backwards and to the left, the reflected pulse in spring L will have the same form as the incident pulse. The pulse that is transmitted in spring R will arrive before the pulse that is reflected in spring L. Consequently, the springs' form just before a signal is conveyed ,a pulse travelling to the left in spring L, and a transmitted pulse moving to the right in spring R are visible when pulses and reflected pulses reach the walls.
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why does fiberglass insulation used in walls of houses often layered with shiny aluminum foil on one side
Answers
Answer:
Foil insulation can prevent radiant heat loss all year round. In summer, it can prevent heat from entering by reflecting sunlight. In winter, it can reflect heat back inside a room, keeping it warmer.
Question 27
What would be easier for someone with a negative Weber slope for weight detection?
A. Telling the difference between 1 pound and 2 pounds
B. Telling the difference between 10 pound and 11 pounds
C. Telling the difference between 20 pound and 21 pounds
D. No weight discriminations could be made
Answers
For someone with a negative Weber slope for weight detection, it would be easier to tell the difference between 20 pounds and 21 pounds.
The Weber's Law states that the just noticeable difference (JND) between two stimuli is proportional to the magnitude of the stimuli. A negative Weber slope indicates that the JND decreases as the magnitude of the stimuli increases. In this case, as the weight increases, the person's ability to discriminate between the weights becomes easier.
Therefore, option C, telling the difference between 20 pounds and 21 pounds, would be easier for someone with a negative Weber slope for weight detection.
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Use the following information to calculate the gradient of River X. If the vertical change is 20 meters in 1 kilometer, then the gradient expressed in m/km is ______.
Answers
The gradient of River X expressed in m/km is 20 m/km.
Why do we compute gradient?Any line or curve's gradient will reveal the pace at which one variable is changing in relation to another. In all mathematical fields, this idea is crucial.
By dividing the difference between the -coordinates by the difference between the -coordinates, the gradient of a line is calculated. This can also be referred to as the vertical divided by the horizontal or the change in divided by the change in.
A river's gradient is a measurement of how steeply it declines over a specific distance.
Gradient = vertical change / horizontal distance = 20 meters / 1 kilometer = 20 m/km
Therefore, the gradient of River X expressed in m/km is 20 m/km.
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You have recently been called to troubleshoot network connectivity problems at a user's workstation. You have found that the network cable runs across high-traffic areas on the floor, causing the cable to wear through and break. You have replaced the cable with a plenum-rated and shielded twisted pair cable. You would like to minimize the problem and prevent it from happening again.Which of the following will BEST protect the cable from further damage?A. Encase the cable in a protective shield and secure the cable to prevent it from slipping.B. Periodically check the cable for kinks and wear. Replace the cable when necessary.C. Run the cable through the ceiling area instead of across the floor.D. Run the cable under the carpet.
Answers
Answer:
C
Explanation:
Prevents further damage to the network cable.
A 1200kg car traveling at a speed of 29 m/s drives horizontally of a 90m cliff the potential energy is=
Answers
Answer:
Sketch the situation.
b. Calculate the potential energy, the kinetic energy, and the total energy of the car as it leaves the cliff.
c. Make a graph displaying the kinetic, gravitational potential, and total energy of the car at each 10 m
increment of height as it drops
Explanation:
The potential energy of the car at that position is 10.6 x 10⁵ J.
What is meant by potential energy ?Potential energy of an object is defined as the energy acquired by the object by virtue its position.
Here,
Mass of the car, m = 1200 kg
Speed of the car, v = 29 m/s
Height of the cliff, h = 90 m
Therefore,
Potential energy of the car, PE = mgh
PE = 1200 x 9.8 x 90
PE = 10.6 x 10⁵ J
Hence,
The potential energy of the car at that position is 10.6 x 10⁵ J.
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3. Jennifer cooks herself a disappointing ready meal in the microwave. Her microwave
operates at 240V and needs a current flow of 3.0A in order to function properly. If
her ready meal takes 4 minutes and 30 seconds to cook, then how much energy will
the microwave use in cooking the meal?
Hint: you need to be careful with units here and look at potentially using more than one
equation to solve this problem.
Answers
Jennifer's prepared dinner will require 194,400 joules (J) of energy to cook.
Why is it crucial to use care when converting units when figuring out how much energy was needed to prepare Jennifer's prepared meal?When figuring out how much energy was used by the microwave to prepare Jennifer's ready meal, it is crucial to be careful with the units used because doing so can result in erroneous figures. To maintain the accuracy of our computation of energy (joules), we must in this case use consistent units for time (seconds), power (watts), current (amperes), and voltage (volts).
The energy used by the microwave to cook
E = P x t
E = energy
P = power
t = time
We can first convert the time to seconds = 270 seconds.
We can then calculate the power
P = V x I
V = voltage
I = current
240V x 3.0A = 720 watts
So, we can substitute the values,
E = 720 watts x 270 seconds = 194,400 joules
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Four 29-ohm resistors are connected in series to an ideal 10-volt battery. What is the equivalent resistance of the circuit?
Answers
Answer:
Equivalent resistance of the circuit is 116 ohm.
Explanation:
Finding the equivalent resistance of the circuit. Since, 29 ohm resistors are connected in series, so
→ Equivalent resistance = R_1 + R_2 + R_3 + R_4
→ Equivalent resistance = (29 + 29 + 29 + 29) ohm
→ Equivalent resistance = 116 ohmFind the force on an electron passing through a 0.50 T magnetic field if the velocity of the electron is 4.0 × 106 m/s. (answer in scientific notation, include sign)
Answers
Given:
The strength of the magnetic field is B = 0.5 T
The velocity of the electron is
\(v=\text{ 4}\times10^6\text{ m/s}\)The charge on an electron is
\(q=-1.6\times10^{-19}\text{ C}\)To find the force.
Explanation:
The force can be calculated as
\(\begin{gathered} F=qvB \\ =1.6\times10^{-19}\times4\times10^6\times0.5 \\ =3.2\times10^{-13}\text{ N} \end{gathered}\)
A student drops a water balloon out of a dorm window 17 m above the ground. What is its speed when it hits the ground?
Answers
this is why:
the equation for calculating the height position from the acceleration due to gravity is
h(t) = -1/2(g)t^2 + vt + p
so in this case g, or the acceleration of gravity is 9.81, the initial velocity (v) is 0, and the initial position (p) is 17. once we plug in these numbers we get the equation h(t) = -4.91t^2 + 17
we know that height is zero when it hits the ground so we can use the quadratic equation to solve for when y is zero. since time cant be negative, then out answer is the positive zero of this equation, or 1.86.
once we know this then we can plug this amount of time into the equation
v(t) = gt + v
this means that the velocity after a certain time (t) is equal to the gravitational force, in this case 9.81, multiplied by the amount of time passed plus the initial velocity (v).
since we know the initial velocity is zero and the time that the balloon hit the ground (1.86), we can multiply the gravitational force, 9.81, by the time when it hits the ground (1.86) to get 18.24 m/s
Information about conservation of energy
Answers
Explanation:
Energy conservation is the effort made to reduce the consumption of energy by using less of an energy service. This can be achieved either by using energy more efficiently (using less energy for a constant service) or by reducing the amount of service used (for example, by driving less). Energy conservation is a part of the concept of Eco-sufficiency. Energy conservation reduces the need for energy services and can result in increased environmental quality, national security, personal financial security and higher savings.It is at the top of the sustainable energy hierarchy. It also lowers energy costs by preventing future resource depletion.
Energy can be conserved by reducing wastage and losses, improving efficiency through technological upgrades and improved operation and maintenance. On a global level energy use can also be reduced by the stabilization of population growth.
Energy can only be transformed from one form to other, such as heat energy to motive power in cars, or kinetic energy of water flow to electricity in hydroelectric power plants. However machines are required to transform energy from one form to other. The wear and friction of the components of these machine while running cause losses of very high amounts of energy and very high related costs. It is possible to minimize these losses by adopting green engineering practices to improve life cycle of the components.
Hope this helps u ......Explanation:
A 10cm long, 2cm wide wooden wedge is pushed into a soft wood block calculate the load on the soft wood if the effort applied id 30 N
Answers
The velocity ratio of the wedge is 0.1
The load on the soft wood is 300 N.
Explain why the car in the photograph would get hot on a sunny day. How will the sunshield help to keep the car cool?
Answers
it will avoid the sun rays from penetrating into the glass to make it hot,and even fall on the seat and burn
Explanation:
Because of the type of metal it was made with
Answer:
The car gets hot in the photograph because of greenhouse effect. Most noticeably the fact that the sunlight enters the car through the windows to heat up the inside surfaces, which then gets trapped inside the car, causing a buildup of temperature.
Sunscreen can help keep the car cool by reflecting the sunlight, which in turn reduces the amount of heat that enters the car. This also decreases the inside surfaces to the exposure of UV lights.
TRUE/FALSE. private corrections firms are not part of the government bureaucracy and therefore do not have to contend with the massive amount of paperwork that can clog government organizations.
Answers
The statement that private corrections firms are not part of the government bureaucracy and therefore do not have to contend with the massive amount of paperwork that can clog government organizations is a true statement.
Bureaucracies are made up of experts, offices that perform tasks.
They are the instruments that enable the government to manage efficiently some essential functions.
Some may argue that their existence is obsolete, yet.
Bureaucrats have administrations for enforcing their own rules:
They also enable executive powers to be carried. Not only enforcing rules, but also creating rules. When people disobey the rules, bureaucracies punish for deviating from the norms.
The public policies are enforced by the bureaucracies, and although many and large bureaucracies may result, their existence is still needed for the governments to ensure that federal and state laws act in coordination.
Therefore, the statement that private corrections firms are not part of the government bureaucracy and therefore do not have to contend with the massive amount of paperwork that can clog government organizations is a true statement.
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Target zone means that is your minimum amount of work you do when training.
(1 Point)
True
False
Answers
Answer:
False
Explanation:
Target zone is generally approximatly 70% (maybe 80%) of your maximum amount of work you can do.
When a comet comes close to the Sun, its volatile ice sublimates and transforms directly from the solid to ________ phase.
Answers
When a comet comes near the Sun, its volatile ice sublimates and changes directly from the solid to the gas phase.
Comets are cosmic snowballs of frozen gases, dust, and rocks, orbiting the Sun. When frozen, comets are the size of a small town. As the comet's orbit approaches the Sun, it heats up, spewing gases and dust onto its giant glowing head, larger than most planets.
Comets vaporize when their orbits come to close to the Sun. Comets do not melt in the strict sense of chinging to liquid. However, since they are made up partly of ice and other volatile compounds, comets vaporize (turn directly to gas) when warmed in the vacuum of space by orbiting near the sun.
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a rectangular loop is placed near a long wire carrying current as shown in figure. if the current decreases with time, what can be said of the current induced in the loop?
Answers
The loop's induced current by using lenz's law flows in a clockwise direction.
According to Lenz's law, the magnetic field produced by the induced current and induced emf in the loop is the opposite of the magnetic field produced by the current in the wire. The magnetic field produced by this current reduces as it flows in a left-to-right direction along the wire, and as it does so, it produces a magnetic field that points into the paper's plane.
Due to the direction of the magnetic field, the direction of the induced current should be clockwise, and the magnitude of the current depends on the size of the loop. The magnetic field produced by this induced current should be into the plane of the paper.
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Note the full question is
A rectangular conducting loop is placed near a long wire carrying a current I as shown in Figure. If I decreases in time, what can be said of the current induced in the loop?
The loaded cab of an elevator has a mass of 3.0 x 10 3 kg and moves 200 m up the shaft in 20 s at constant speed. At what average rate does the cable do work on the cab
Answers
The average rate at which the cable does work is 294,000 J/s.
The given parameters:
mass, m = 3000 kgheight, h = 200 mtime of motion, t = 20 sThe average rate at which the cable does work is calculated as follows;
\(P = \frac{E}{t} \\\\P = \frac{mgh}{t} \\\\P = \frac{3000 \times 9.8 \times 200}{20} \\\\P = 294,000 \ J/s\)
Thus, the average rate at which the cable does work is 294,000 J/s.
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In laboratorio, versi in un tubo a U acqua da una estremità e olio dall'altra. Le densità dell'olio e dell'acqua sono, rispettivamente, 890 kg/m^3 e 1010 kg/m^3. L'altezza della colonna d'acqua è 18 cm. ▶ A che altezza arriva l'olio nell'altro ramo del tubo? ▶ Quanto vale la differenza fra i livelli superiori dell'acqua e dell'olio nei due rami?
Answers
Answer:
20.4 cm; 2.4 cm
Explanation:
The formula for the pressure p exerted by a column of a liquid with density ρ and height h is
p = ρgh
where h = the acceleration due to gravity
If you have two liquids balancing each other in a U-tube
p₁ = p₂
ρ₁gh₁ = ρ₂gh₂
ρ₁h₁ = ρ₂h₂
Data:
ρ₁ = 1010 kg/m³; h₁ = 18 cm
ρ₂ = 890 kg/m³; h₂ = ?
1. Height of oil column
We measure from the horizontal red line.
\(\begin{array}{rcl}\rho_{1}h_{1} & = &\rho_{2}h_{2}\\\text{1010 kg/m}^{3} \times \text{18 cm} & = & \text{890 kg/m}^{3} \times h_{2}\\\text{18 180 cm} & = & 890h_{2}\\h_{2} & = & \dfrac{\text{18180 cm}}{890}\\\\ & = & \text{20.4 cm}\\\end{array}\\ \text{The height of the oil column is $\textbf{20.4 cm}$}\)
2. Height of oil above water
h₂ - h₁ = 20.4 cm – 18 cm = 2.4 cm
A stone is dropped from rest at a height of 2.0 m above the surface of a planet.
The planet has no atmosphere.
The speed of the stone just before reaching the surface of the planet is 3.8 m/s.
What is the acceleration of free fall on the planet?
A zero
B 1.9 m/s²
C 3.6 m/s²
D 7.2m/s²
Answers
The acceleration of free fall on the planet is 3.6 m/s^2. The correct answer is option C.
Let's assume that acceleration of free fall on the planet is a.
Potential energy of stone at height 2.0m is given be,
mah = 2ma
Kinetic energy of stone just before reaching the surface of the planet is,
Kinetic energy = mv^2/2
v= 3.8 m/s
Kinetic energy = 7.22m
By law of conservation of energy, Kinetic energy will be equal to Potential energy, and we get;
2ma = 7.22m
a = 3.6 m/s^2
Hence, the acceleration of free fall on the planet is is 3.6 m/s^2. Option C is the correct answer.
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If the surface becomes smaller the pressure becomes
Answers
Answer:
Greater
Explanation:
Have a nice day
please mark me brainliest if this helps
Answer:
if the surface becomes smaller, the pressure becomes larger,
Conservation of Energy:
A 60 kg glider is gliding through the air at a height of 300 meters with a speed of 40 m/s. The glider dives to a height of 200 meters. Determine the glider's new speed.
Answers
The new speed of the glider is 42.2 m/s.
The new speed of the glider can be calculated using the principle of the law of conservation of energy.
Note: Total energy of the glider before the dive = Total energy of the glider after the dive.
Formula:mv²/2+mgh = mV²/2 +mgH................ Equation 1Simplifying the equation above,
v²/2+gh = V²+gHmake V the subject of the equation.
V = √[(v²/2)+gh]-gH]............... Equation 2Where:V = New speed of the gliderv = initial speed of the gliderh = initial height of the gliderH = New height of the gliderg = acceleration due to gravity.From the question,
Given:v = 40 m/sh = 300 metersH = 200 metersg = 9.8 m/s²Substitute these values into equation 2.
V = √[(40²/2)+(9.8×300)-(9.8×200)]V = √(800+2940-1960)V = √1780V = 42.2 m/s.Hence, The new speed of the glider is 42.2 m/s.
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HELPP ASAP!!Which of the following is a true statement?
A.Organic carbón is found in all living things
B. a compound has different properties from each of its elements
C.Water is made from the elements of carbon and oxygen
D. Hydrogen compounds are the most comment in the world
Answers
Answer:A
Explanation
B a compound can ha e the same properties as it’s elements
C water is H2O- Hydrogen and oxygen
D water is the most common compound
Therefore A must be correct
Why is thunder heard later after than the flash of light?
Answers
Answer:
During a thunderstorm, lightning is seen first and thunder is heard later on because light travels faster than sound. If you see a lightning flash but cannot hear any thunder, the thunderstorm is most likely be quite far away from you.
the primary coil of a transformer has n1 5 350 turns, and the secondary coil has n2 5 2 000 turns. if the input voltage across the primary coil is dv 5 170 cos vt, where dv is in volts and t is in seconds, what rms voltage is developed across the secondary coil?
Answers
The rms voltage developed in secondary coil is 971.42 volt.
A transformer is the simplest device used to transfer electrical energy from one AC circuit to another through the process of electromagnetic induction. A transformer either increases AC voltage (step-up transformer) or decreases AC voltage (step-down transformer). Transformers, which are typically used to transmit and distribute AC power, are essentially voltage regulators. Transformers serve a variety of purposes, such as stepping up the voltage of generators to transmit power over long distances, or stepping down the voltage of traditional electrical circuits to power low-voltage devices such as doorbells and toy trains.The term RMS is an abbreviation for Root Mean Square. RMS voltage is defined as the square root of the mean square of the instantaneous value of the voltage signal. The rms value is also called the root mean square. RMS voltage can also be defined as the integral of the square of the instantaneous value during a cycle of continuously varying voltage.
\(\frac{V2}{V1}=\frac{N2}{N1}\)
V2= 2000 x 170/350=971.42 volt
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2. A block of mass 1.2 kg lies on a frictionless surface. A man slides the block
against a spring, compressing it .15m. When the man lets go of the spring, the
block moves at 5 m/s. What is the spring constant of the spring?
mm
.
Answers
Answer:
The spring constant will be "1333.33 N/m".
Explanation:
The given values are:
Mass,
m = 1.2 kg
Displacement compression,
x = 0.15 m
Block's velocity,
\(v_i=5 \ m/s\)
As we know,
⇒ \(E_i=E_f\)
or,
⇒ \(K_i+v_i=K_f+v_f\)
⇒ \(\frac{1}{2}mv_i^2+0=0+ \frac{1}{2}Kx^2\)
So,
⇒ \(K=\frac{mv_i^2}{x_2}\)
On substituting the values, we get
⇒ \(=\frac{1.2\times 5\times 5}{0.15\times 0.15}\)
⇒ \(=\frac{30}{0.0225}\)
⇒ \(=1333.33 \ N/m\)