Answers
Answer:
\(T = 6.75\,N\cdot m\)
Explanation:
Vectorially speaking, torque is the cross product between force and distance from fulcrum. Its magnitude is equal to the following expression:
\(T = F\cdot r \cdot \sin \theta\)
\(T = F_{\bot} \cdot r\)
Let assume that force is perpendicular to the distance from the fulcrum. So, the torque needed to turn the bolt is:
\(T = (15\,N)\cdot (0.45\,m)\)
\(T = 6.75\,N\cdot m\)
Related Questions
This graph shows how the concentration of a reactant changed during a
chemical reaction. Which sentence best describes how the concentration of
the reactant changed?
Answers
Answer: B
Explanation: A P E X
The sentence best describes how the concentration of the reactant changed is it decreased gradually as the reaction progressed.
The correct option is B.
What is chemical reaction?The chemical reaction is the reaction between two reactants which led to the formation of products.
The products are substances which forms after reaction. The reactants are the substances which are original materials.
This graph shows how the concentration of a reactant changed during a chemical reaction.
The sentence best describes how the concentration of the reactant changed is it decreased gradually as the reaction progressed.
Thus, the correct option is B.
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7. State condition of equilibrium when a borly is acted upon by a number of parallel forces. A uniform metal tube of length 5cm and mass 9 kg is suspended horizontally by two vertical wire attaches at 50cm and 150cm respectively from the ends of the tuber Find the tension in each wire. in tril Solution -
Answers
According to the question the tension in each wire is 1.96 N.
What is tension?Tension is a term that describes the psychological and physical state of a person or system in which there is a high degree of stress, uncertainty, and anxiety. It is often associated with conflict and is often experienced when individuals or groups feel threatened or constrained in some way. Tension can be experienced in a variety of different contexts, from interpersonal relationships to the workplace. It can result from a variety of different factors, including a lack of communication, conflicting goals or expectations, and unmet needs.
The body is in equilibrium when the sum of all forces acting on it is equal to zero. In this case, the forces acting on the metal tube are the two wires and the weight of the tube due to gravity.
The tension in each wire is equal to the weight of the tube divided by the length of the tube. This is because the tube is suspended horizontally, so the forces in each wire must be equal in order to keep the tube in equilibrium.
Therefore, the tension in each wire is:
T = (9 kg × 9.8 m/s2) / (5 cm × 0.01 m)
= 1.96 N
Therefore, the tension in each wire is 1.96 N.
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What is the ratio of the earth's gravitational force on you, to your gravitational force on the earth?
Answers
Answer: 10%
Explanation:
n this case, if the earth' mass goes up by 10%, then the force of gravity on you, or your weight, will increase by the same amount, that is 10%
It takes a person 42 seconds to swim in a straight line from the west end of apool to the east end of the pool, a distance of 45 meters. What is theswimmer's velocity?OA. 1.1 m/s westOB. 0.9 m/s eastOC. 1.1 m/s eastD. 0.9 m/s west
Answers
Given
Time taken, t=42 sec
The distance travelled is d=45 m
To find
The swimmer's velocity
Explanation
The velocity is the ratio of the distance to time
Thus,
\(\begin{gathered} v=\frac{d}{t} \\ \Rightarrow v=\frac{45}{42}=1.1\text{ m/s} \end{gathered}\)The velocity is directed from west to east.
Conclusion
The swimmer's velocity is
C. 1.1 m/s east
What is currently happening with the Canis Major Dwarf galaxy?
A. It is expanding.
B. It is going supernova.
C. The Milky Way is absorbing it.
D. It is dying.
Answers
Answer:
The Canis Major Dwarf galaxy is currently being absorbed by the Milky Way galaxy. The gravitational pull of the Milky Way is slowly pulling the Canis Major Dwarf galaxy apart and incorporating its stars into the Milky Way. This process is expected to continue for several billion years until the Canis Major Dwarf galaxy is completely assimilated by the Milky Way.
What is the motion of the particles in this kind of wave? A hand holds the left end of a set of waves. The waves themselves make a larger set of waves in the same direction as that of the smaller waves. A label Wave motion is above the series of waves and an arrow next to the label points right. The particles will move up and down over large areas. The particles will move up and down over small areas. The particles will move side to side over small areas. The particles will move side to side over large areas.
Answers
Answer:
D
Explanation:
The particles will move side to side over large areas
Answer:
→A←Explanation:
D its incorrect in edge
Based on the model you saw in the study, predict what will happen to the
motion of water molecules as the temperature in the system decreases.
O A. The molecules will move more quickly.
OB. The change in temperature will have little or no effect on the
motion of the molecules.
O C. The molecules will move more slowly
O
D. The molecules will collide more often.
Answers
Answer:
C. The molecules will move more slowly
Explanation:
As the temperature in the system decreases, the random motion of the molecules decreases and as a result the molecules will move more slowly. So, option C is correct.
What is meant by intermolecular forces ?Intermolecular force is defined as the force of attraction or repulsion that mediates between the neighboring molecules in a system.
Here,
The water molecules in the system have more intermolecular distance between them and thus they are in random motion and are colliding among each other. These water molecules have lesser intermolecular force of attraction when compared to solids and higher than that of gas molecules.
When the temperature of the system decreases, the kinetic energy of the water molecules decreases which results in the reduced speed of the molecules. The intermolecular force of attraction between the molecules increases. As a result, the intermolecular distance between the molecules is decreased, thus the molecules comes more closer to each other. Due to this, the random motion of the water molecules in the system gets decreased which in turn causes the collision between the molecules become much lesser.
Hence,
As the temperature in the system decreases, the random motion of the molecules decreases and as a result the molecules will move more slowly.
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Attaching the image here.
Help me please.
A
B
C
D
Answers
I will go to school tomorrow .....is this present tense or past tense or future tense
Answer:
D
Explanation:
The given vector can be broken down into two components (as shown in the figure).
Which results ; vector (s) = 3x + 4y.
The principle of cross-cutting relationships states that certain features, such as faults, are than the rock layers they cut through. These features are breaks in Earth’s surface where rock has moved sideways, upward, or downward. formations are made of molten rock that has cooled. Those on Earth’s surface are called . Those beneath Earth’s surface are called .
Answers
What information do you need to collect in order to study an object’s motion?
Answers
The information we will need to demonstrate that an object is in motion include;
initial position of the objectfinal position of the objecttime difference between the initial and final position of the objectWhat is an object in motion?An object is in motion when it changes its position with time, relative to a stationary object.
Mathematically, we can use the following equation to demonstrate the motion of an object.
v = Δx / Δt
where;
Δx is the change in the position of the objectΔt is the change in time of motion of the objectSo the data we will need to demonstrate that an object is in motion include;
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A 50-kg ice skater turns a bend at 7 m/sec. If the radius of the curve is 5 m, what is the centripetal force in Newtons provided by the friction between the blade of the skate and the ice?
Answers
The centripetal force in Newtons provided by the friction between the blade of the skate and the ice is 490 N
How do i determine the centripetal force?The following data were obtained from the question:
Mass of ice skater (m) = 50 KgVelocity (v) = 7 m/sRadius (r) = 5 metersCentripetal force (F) =?The centripetal force can be obtained as illustrated below:
F = mv²/r
= (50 × 7²) / 5
= (50 × 49) / 5
= 2450 / 5
= 490 N
Thus, we can concluded that the centripetal force is 490 N
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Two atoms of the same element only differ because one of the atoms has more electrons, making it an ion. Which statement is true? They have the same A-number and the same Z-number. They have the same A-number but different Z-number. They have a different A-number but the same Z-number. They have different A-numbers and different Z-numbers.
Answers
The correct answer is Option B. The statement "they have the same A-number but different Z-number" is true .
Atoms of the same element only differ because one of the atoms has more electrons, making it an ion.
This difference does not affect the mass of the atom, which is determined by the sum of its protons and neutrons, represented by the atomic mass or A-number.
The number of protons in an atom is called the atomic number or Z-number.
The Z-number of an element is unique to it. All the atoms of a given element have the same number of protons.
Thus, for example, all carbon atoms have six protons, making the Z-number of carbon 6.
However, different isotopes of an element can have different numbers of neutrons.
This means that they have a different atomic mass or A-number.
Therefore, they have the same A-number but different Z-number.
Therefore the correct Option is B.
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A physical science student is building a battery with two metal plates. The table below shows a list of
metals and their electron affinity given in electron volts, eV.
Metal Electron Affinity (electron volts, eV)
Calcium - 2.87
Zinc
-0.76
Lead -0.13
Copper +0.34
The student has a copper plate. When paired with copper, which metal plate will produce a higher
voltage?
O Calcium
OZinc
O Lead
O Copper
Answers
When paired with copper, the metal plate that will produce a higher voltage is a) Calcium.
The voltage produced in a battery is related to the difference in electron affinity between the two metals used as electrodes. A greater difference in electron affinity results in a higher voltage.
In this case, the electron affinity of copper is +0.34 eV. Among the given options, calcium has the highest electron affinity with -2.87 eV. The difference between the electron affinities of copper and calcium is the greatest among the options, indicating a larger potential difference and thus a higher voltage when paired together.
Therefore, when paired with copper, the calcium plate will produce a higher voltage compared to zinc, lead, or another copper plate. Therefore, Option a is correct.
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The question was incomplete. find the full content below:
A physical science student is building a battery with two metal plates. The table below shows a list of
metals and their electron affinity given in electron volts, eV.
Metal Electron Affinity (electron volts, eV)
Calcium - 2.87
Zinc
-0.76
Lead -0.13
Copper +0.34
The student has a copper plate. When paired with copper, which metal plate will produce a higher
voltage?
A. Calcium
B. Zinc
C. Lead
D. Copper
Six identical cells with an EDS of 3 V connected in a battery. Resistors R₁ and R₂=16Ω are connected to the battery, the total resistance of the external circuit is R=6Ω and the current flowing in it is 1 A. Determine the resistance of the first resistor and the EDS and internal resistance of the battery.
Answers
- The resistance of the first resistor (R₁) is 12 Ω.
- The electromotive force (EMF) of the battery is 18 V.
- The internal resistance of the battery is 12 Ω.
To solve the given problem, we can apply Kirchhoff's laws and Ohm's law to determine the resistance of the first resistor (R₁) and the electromotive force (EMF) and internal resistance of the battery.
Let's start by calculating the resistance of the first resistor (R₁):
1. Apply Ohm's law to find the voltage drop across the external circuit:
V = I * R
V = 1 A * 6 Ω
V = 6 V
2. The voltage drop across the external circuit is equal to the EMF minus the voltage drop across the internal resistance of the battery:
V = E - Ir
6 V = E - (1 A * r) (where r is the internal resistance of the battery)
3. We also know that the EMF of the battery is the sum of the voltage drops across each cell in the battery:
E = 6 cells * 3 V/cell
E = 18 V
4. Substitute the value of E in the equation from step 2:
6 V = 18 V - r
r = 12 Ω
Therefore, the resistance of the first resistor (R₁) is 12 Ω.
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Could you please help with the attached question?
Answers
the work done by the ball is 38.72 J.
define work done ?
In physics, work is defined as the product of force and displacement. It is a measure of the energy transferred when a force is applied over a distance, resulting in the displacement of an object. Mathematically, work is represented by the formula:
Work = Force x Distance x Cos(theta)
where Force is the applied force, Distance is the displacement of the object, and theta is the angle between the force and the displacement vectors. The unit of work is the Joule (J), which is equivalent to one Newton-meter (N·m). Work can be positive, negative, or zero, depending on the direction of the force and displacement. If the force is in the same direction as the displacement, work is positive, and if the force is in the opposite direction to the displacement, work is negative. If the force and displacement are perpendicular, the work is zero.
Work = Force x Distance x Cos(theta)
where:
Force = 484 N (given)
Distance = 8 cm = 0.08 m (given)
Cos(theta) = 1 (since the force and displacement are in the same direction)
Plugging in the values, we get:
Work = 484 N x 0.08 m x 1
Work = 38.72 Joules (J)
Therefore, the work done by the ball is 38.72 J.
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what is a shargaff rule
Answers
According to Chargaff's rule, the amounts of adenine (A), thymine (T), and guanine (G) in the DNA molecule are equal to each other. The amounts of cytosine (C) and guanine (G) are also equal.
Who is Chargaff ?Erwin Chargaff was a biochemist, author, Bucovinian Jew who immigrated to America during the Nazi era, and professor of biochemistry at Columbia University's medical school.
Chargaff found patterns among the four bases, or chemical building blocks, of DNA, which are directly related to DNA's function as the genetic material of living things.
He was born in Austria-Hungary. Heraclitean Fire: Sketches from a Life Before Nature, an autobiography he penned, received positive reviews.
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An object of temperature 329 K is in a room at 288 K. Calculate how
much heat is lost from the object in 10 minutes assuming an emissivity
of 0.9 and a surface area of 1.8 m². Take the heat loss units as J for
Joules.
Answers
The heat loss from the object in 10 minutes is -0.26 * 10⁻⁹ J.
How can Heat loss from an object be calculated?
Heat loss can be calculated using this formula:
Q/t = oeA {(T₂)⁴ - (T₁)⁴}
It can be found that:
Q = heat loss in joules
t = time in seconds, 10 minutes = 600 seconds
σ = (5.67 x 10⁻8J/s . m² . K⁴)
e = emissivity, 0.9
A = surface area of 1.8 m²
T₂ = temperature of a room, 288 K
T₁ = temperature of an object, 329 K
To find Q which is heat loss,
where,
Q = oeA {(T₂)⁴ - (T₁)⁴}
Q = oeA {(T₂)⁴ - (T₁)⁴}(t)
Q = (5.67 x 10⁻8J/s . m² . K⁴) (0.9) (1.8) (288K⁴ - 329K⁴)(600)
Q = (5511.24){(288)⁴ - (329)⁴}
Q = (5511.24){(6879707136) - (11716114081)}
Q = (5511.24) (-4836406945) = -26652356.64
Q = -0.26 * 10⁻⁹ J
Therefore, the heat loss will be -0.26 * 10⁻⁹ J.
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What are three ways a driver can cause a car to accelerate?
A. Turn the key in the ignition while the car is stopped.
B. Turn the steering wheel while the car is moving.
C. Press the gas pedal while the car is stopped.
D. Press the brake pedal while the car is moving.
Answers
Answer:
B,C,D
Explanation:
Ap3X
Convert the following statement to the language used by physicists, "I am cold, please turn on the heat."
Answers
Answer:
Explanation:fog
Water of mass, m at 100 ℃ is added to 0.50 kg of water at 20 ℃ in a lagged calorimeter of thermal capacity 105 JK −1 . If the specific heat capacity of water is 4200 kg −1K −1 and the final temperature of the mixture is 70℃, determine the value of m.
Answers
The value of m given that the temperature of the mixture is 70°C is : 0.875 Kg
Determine the value of mApplying the principle of energy conservation
Heat lost by the hot body = heat absorbed by the cold water + calorimeter
= m * 4200 * ( 100 - 70 ) = 0.50 * 4200 * ( 70 -20 ) + 105 * ( 70 -20 )
= m * 126000 = 110250
therefore ;
m = 110250 / 126000
= 0.875 kg
Hence we can conclude that The value of m given that the temperature of the mixture is 70°C is : 0.875 Kg
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The energy of motion is called...?
Answers
how much work did the movers do horizontally pushing a 46 kg crate 10.3 across a rough floor without acceleration, if the effective coefficient of friction was 0.5
Answers
The work done is 2321 J.
What is the work that is done?We have to note that the acceleration has to do with the change in the velocity of the object with time. We are told that there is a movement of the crate as we can see. Let us note that the work that is done by the object subtracted from the work done by the friction. Thus we have that;
Work = (46 * 9.8 * 10.3) - (0.5 * 46 *9.8 * 10.3)
Work = 4643 - 2321
= 2321 J
The work that has been done is 2321 J. This is done in moving the object
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Heat can be transferred by conduction when one object is in direct contact with another object. Conduction can occur in solids, liquids, or gases, but it is more effective in A. gases because their particles are moving faster. B. liquids and gases because they occur at higher temperatures. C. liquids because they have a definite volume but not a definite shape. D. solids and liquids because their particles are arranged more closely together.
Answers
Answer:
The correct answer is D. solids and liquids because their particles are arranged more closely together.
A ball on the end of a string is whirled around in a horizontal circle of radius 0.478 m. The plane of the circle is 1.02 m above the ground. The string breaks and the ball lands 2.5 m away from the point on the ground directly beneath the ball’s location when the string breaks. The acceleration of gravity is 9.8 m/s 2 . Find the centripetal acceleration of the ball during its circular motion. Answer in units of m/s 2 .
Answers
Answer:
Explanation:
We shall find first the velocity of ball at the time when string breaks. Let it be v . During its fall on the ground , 1.02 m below, we use the formula
h = 1/2 gt² where t is time of fall .
1.02 = 1/2 x 9.8 x t²
t²= .2081
t = .456
During this time it travels horizontally at distance of 2.5 m with uniform velocity of v
v x .456 = 2.5
v = 5.48 m /s
centripetal acceleration
= v² / r where r is radius of the circular path
= 5.48² / .478
= 62.82 m /s²
In an electrical storm, an electric field builds up in the space between a cloud and the ground. Lightning occurs when the magnitude of the electric field reaches a critical value EC, at which air is ionized.
Required:
a. Treat the cloud as a flat square with sides of length L. If it is at a height h above the ground, find the amount of energy released in the lightning strike.
b. Based on your answer from part a, which is more dangerous, a lightning strike from a high-altitude cloud or a low-altitude one
Answers
This answer was deleted by a Brainly Staff Member for violating our Terms of Service.
The definition of agility
Answers
what are the two major types of mechanical energy and how do you calculate each equations with variables identified?
Answers
The equation to calculate both of them are:
KE = 1/2 * m * v^2
PE = m * g * h
What is Kinetic energy?Kinetic energy is described as the energy an object possesses due to its motion. The equation to calculate kinetic energy is:
KE = 1/2 * m * v^2
Where:
KE = Kinetic energy
m = Mass of the object
v = Velocity of the object
Potential energy is described as the energy an object possesses due to its position or configuration.
. The equation to calculate gravitational potential energy is:
PE = m * g * h
Where:
PE = Gravitational potential energy
m = Mass of the object
g = Acceleration due to gravity (9.81 m/s^2 on Earth)
h = Height or elevation of the object relative to a reference point
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name of scientist that divided elements into 4 catagories
Answers
Answer:
I believe the answer is Mendeleev
06.** A block takes twice as long to slide down an inclined plane that makes an angle of 35 with the horizontal as it does to fall freely through the same vertical distance h. What is the coefficient of kinetic friction? [μ = 0.16]
Answers
The coefficient of kinetic friction between the block and the incline is 0.168.
Coefficient of kinetic frictionThe coefficient of kinetic friction is determined from the principle of conservation of energy as follows;
distance traveled on the incline = L
L = h/sin35
L = 1.743 h
Since it takes twice the time travel down,
velocity to slide = 1.743 h/2t = 0.871 v
v is the velocity to drop from the vertical heightK.E of the block when it slides = ¹/₂mv₁² = ¹/₂m(0.871v)² = 0.871²(K.E to fall) = 0.758K.E to fall straight down
Energy lost to friction1 - 0.758 = 0.24
Conservation of energyμmgcos(35) = 0.24(mgsin(35)
μcos(35) = 0.24(sin(35)
μ = 0.168
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i need answers
100 points help me nowwww
Answers
Answer:
it is c trust me im smart