A cube of wood exerts a pressure of 2pa.when it is placed on a floor.what is the force exerted by the cube if it's surface area is 5m2.
Answers
Answer:
The answer is 10 NExplanation:
The force exerted by the cube can be found by using the formula
force = area × pressure
From the question we have
force = 5 × 2
We have the final answer as
10 NHope this helps you
Related Questions
The potential difference across the ends of a wire is doubled in magnitude. If ohm’s law is obeyed, which one of the following statements concerning the resistance of the wire is true?.
Answers
The potential difference across the ends of a wire is doubled in magnitude. If ohm’s law is obeyed, the resistance is not changed. Thus, option A is correct.
What is current?The current is the stream of charges which flow inside the conductors when connected across the end of voltage.
From Ohm's law, V =IR
Here, R is the proportionality constant called the resistance of the resistor.
The complete question is given in the image attached.
The potential difference across the ends of a wire is doubled in magnitude.2V = IRR =2 V/IAs, the resistance is a constant value, it does not change.
The following statements concerning the resistance of the wire true is :
The resistance is not changed
Thus, the correct option is A.
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Two coils A and B are wound side by side. Coil A has 8120 turns and coil B has 11842 turns. 54% of flux produced by coil A links coil B. A current of 6 A in coil A produces 0.02 mWb, while the same current in coil B produces 0.078 mWb. a) Calculate the mutual inductance and the coupling coefficient. b) Calculate the emf induced in coil B when the current is reversed in 0.015 seconds.
Answers
a) Mutual inductance = 0.108 H; Coupling coefficient = 0.482. b) - 4.95 V.
a) Mutual inductance, M between coil A and coil B can be given as:
M = k√(L_AL_B) here, k is the coupling coefficient, L_A and L_B are the inductances of the coil A and coil B respectively. Since 54% of flux produced by coil A links coil B,
So, K = 0.54
L_A = N_A Φ/I_AL_A
= 8120 × 0.02/6
= 27.07 mH
L_B = N_B Φ/I_BL_B
= 11842 × 0.078/6
= 154.63 mH
M = k√(LALB) = 0.482 × √(27.07 × 0.15463) = 0.108 H
b) The emf induced in coil B can be given as:-
ε = M (dI_B/dt)/L_B
ε = 0.108 × (-6/0.015) / 0.15463 = -4.95 V
Thus, the emf induced in coil B when the current is reversed in 0.015 seconds is -4.95 V.
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Which refers to the rate of change in velocity?
O speed
O acceleration
O direction
O magnitude
Answers
Answer:
acceleration is the answer
Answer:
Acceleration
Explanation:
d What should be done to make a simple machine more efficient?
Answers
Answer:
the main cause of decreasingthe efficient of simple machine is the effect of friction so, indoder to increase efficiency of a simple machine we should remove the friction using lubricants, decreasing the overload in machine,replacing sliding friction with rolling friction etc,
we should do thses all to increase efficiency of a simple machine.
hope u get it..
During times of dire emergency, people have been known to lift tremendous weights, such as the rear of a car to free someone trapped underneath. Is greater power necessary to perform such feats versus lifting the same car using a jack?
Explain
Answers
Answer:
Yes, greater power is necessary to lift a car with your own body in a dire emergency situation than it would be to lift the same car using a jack.
Explanation:
This is because lifting the car with your body requires a combination of strength, power, and speed, all of which must be generated by your muscles. In contrast, a jack is a tool that uses hydraulic pressure to lift the car, which requires much less effort on your part.
When lifting a car with your body, you are essentially performing a squat or deadlift with an extremely heavy weight. This requires your muscles to produce a tremendous amount of force to overcome the weight of the car and gravity, as well as to generate the speed and power necessary to lift the car quickly and effectively.
In addition, lifting a car with your body requires you to use multiple muscle groups simultaneously, including your legs, back, arms, and core. This makes it a very taxing exercise that can quickly fatigue your muscles and potentially lead to injury if not performed correctly.
In contrast, using a jack to lift a car requires minimal effort on your part, as the hydraulic pressure does the majority of the work. This means that you do not need to generate as much force, speed, or power with your muscles, and can avoid the risk of injury or fatigue associated with lifting the car with your body.
Overall, lifting a car with your body is a remarkable feat that requires a tremendous amount of strength, power, and speed. While it can be done in dire emergency situations, it should not be attempted unless absolutely necessary, and only by individuals who are properly trained and physically capable of performing the lift safely.
Which of the following is NOT true about differences between novae and supernovae? A. Novae are much less luminous than supernovae.
B. Supernovae eject gas into space but novae do not.
C. Novae occur only in binary star systems, while supernovae can occur both among single stars and among binary star systems.
D. The same star can undergo novae explosions more than once, but can undergo only a single supernova.
Answers
The statement that is NOT true about the differences between novae and supernovae is D. It is not accurate to say that the same star can undergo novae explosions more than once, but can undergo only a single supernova.
Novae occur in binary star systems where one of the stars is a white dwarf, while supernovae can occur in both single stars and binary star systems. Novae are less luminous than supernovae, but they do eject gas into space, unlike what is stated in option B. Novae occur when a white dwarf star pulls material from a companion star onto its surface until the pressure and temperature reach a point where nuclear fusion ignites, causing a sudden increase in brightness.
In contrast, supernovae occur when a massive star runs out of fuel and collapses, causing a massive explosion that can outshine entire galaxies. While a star can undergo multiple nova events, it cannot undergo multiple supernovae because the star is destroyed in the process. In summary, the statement that is not true about differences between novae and supernovae is D.
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1. meaning of heat and temperature
2. differences between heat and temperature
Answers
Answer:
1.heat is a form of 1.temperature is a form
energy that gives of energy that is used to
sensation of measure hotness or
warmth. or coldness of body.
2.its si unit is 2.its si unit is kelvin.
joule.
How did conflict between countries affect trade along the Silk Road?
Answers
Answer:
A: It decreased trade because soldiers no longer protected the oases.
I took it on E2020. I hope I've helped. If you need further explanation, please comment below.
Answer:
Yes it is A
It decreased trade because soldiers no longer protected the oases.
Explanation:
A rope is run over a massless pulley. The left-hand side of the rope is attached to a 3 kg mass, which rests on the ground. The right side of the rope is attached to a 5 kg mass, which is some unknown height above the ground. The system is released from rest. What is the magnitude of the instantaneous acceleration of the system when it is released from rest?
Answers
Given:
Mass attached to the left-hand side = 3 kg
Mass attached to the right-hand side = 5 kg
Let's find the magnitude of the instantaneous acceleration of the system when it is released from rest.
Apply the formula:
\(\begin{gathered} a=\frac{net\text{ pulling force}}{total\text{ mass}} \\ \\ a=\frac{(m_2\times g)-(m_1\times g)}{m_1+m_2} \end{gathered}\)Where:
m1 = 3 kg
m2 = 5 kg
g = 9.8 m/s^2
Thus, we have:
\(\begin{gathered} a=\frac{(5\times9.8)-(3\times9.8)}{3+5} \\ \\ a=\frac{49-29.4}{8} \\ \\ a=\frac{19.6}{8} \\ \\ a=2.45m/s^2 \end{gathered}\)The magnitude of the instantaneous acceleration is 2.45 m/s².
ANSWER:
2.45 m/s²
What kind of motion does a torque tend to impart to an object?
A. Torque tends to increase the rotational inertia of the object.
B. Torque tends to decrease the rotational inertia of the object.
C. Torque tends to twist or change the state of rotation of the object.
D. Torque tends to increase the linear speed of the object.
Answers
The object's rotational inertia begins to decrease under torque. Torque has a tendency to twist an item or alter its state of rotation.
Describe torque.
The power that can cause an object to rotate around an axis is measured in torque. Similar to how force accelerates an object in linear mechanics, torque accelerates an object in an angular direction. A vector number is a torque.
Force and acceleration are related by Newton's second equation. Torque and rotary inertia replace force and mass, respectively, in the angular application of Newton's Second Law. The relationship between angular acceleration and torque holds true when an object's circular inertia is constant.
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If It took 40 sec for a
vehicle or weight 40,000
newton to move round 7meltes
What time will it achieve same
reat for anothercircular path
or radius 21 metres given
that
the condition
Condition of the
vehicle remains the same
Answers
I can’t understand your question
Which class of lever has all advantages of lever
Answers
Answer:
Helo ....
so this answer would be First class levers
becoz...
First-class levers have a considerable practical advantage over the other types of levers. They convert a downward moving force into a lifting force
is it possible to mark it brainliest <3
A starter cord for a generator is 1 m long. It is wound onto a drum with a diameter of 10 cm. A person starts the generator by pulling with a force of 100 N. A) What torque does he apply to the engine? b) How much work does he do?
Answers
A) To find the torque that the person applies to the engine, we need to first find the force applied at the edge of the drum. We can do this using the formula:
Force = Torque / Radius
where the radius is half the diameter of the drum.
Radius = 10 cm / 2 = 0.05 m
Force = 100 N
Therefore:
Torque = Force x Radius = 100 N x 0.05 m = 5 Nm
So the person applies a torque of 5 Nm to the engine.
B) To find the work done by the person, we need to use the formula:
Work = Force x Distance
where the distance is the length of the starter cord that is pulled out.
Length of cord = 1 m
Since the cord is wound around the drum, the distance that the person pulls is equal to the distance that the drum rotates. The circumference of the drum is:
Circumference = π x diameter = π x 10 cm = 0.314 m
So the distance that the person pulls is 0.314 m.
Therefore:
Work = Force x Distance = 100 N x 0.314 m = 31.4 J
So the person does 31.4 Joules of work
Torque = force x radius
The radius of the drum is half of its diameter, or 0.05 m. Therefore:
Torque = 100 N x 0.05 m = 5 Nm
B) To calculate the work done by the person, we need to know the distance the cord is pulled. Since the cord is 1 m long, and it is wound around the drum once, the distance it is pulled is equal to the circumference of the drum. The circumference can be calculated as follows:
Circumference = pi x diameter
Circumference = 3.14 x 0.1 m = 0.314 m
Therefore, the work done by the person is:
Work = force x distance
Work = 100 N x 0.314 m = 31.4 J
The person does 31.4 Joules of work to start the generator.
One year consists of 365 days. this is closest to how many seconds?
Answers
1 year has 365 days
1 day has 24 hours
Each hour has 60 minutes
And each minute has 60 seconds
The number of seconds in 365 days is 365x24x60x60 = 31536000
So there is 31536000 seconds in 1 year
Hope it helped you!!
If one year consists of 365 days, this is closest to x = 3.15 × 10⁷ seconds.
What is the number of seconds in a year?
Given that;
Number of days in a year = 365Number of seconds in 365 days = ?Note that; there are 24 hours in a day, 1440 minutes in a day and 86400 seconds in a days.
1 day contains 86400 seconds
365 contains x seconds
x = 365 × 86400
x = 3.15 × 10⁷ seconds
Therefore, if one year consists of 365 days, this is closest to x = 3.15 × 10⁷ seconds.
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Which of the following is not an observed characteristic of the cosmic microwave background?
The basic chemical composition of the universe had been determined.
It contains prominent spectral lines of hydrogen, the primary chemical ingredient of the universe.
Before that time, the gas in the universe was dense and ionized and therefore did not allow light to travel freely.
Answers
The observed characteristic of the cosmic microwave background that is not correct is "It contains prominent spectral lines of hydrogen, the primary chemical ingredient of the universe."
What is Cosmic Microwave Background (CMB)?Cosmic Microwave Background (CMB) is the residual radiation from the Big Bang that occurs in the microwave range and is observable from all directions in space. The radiation is now cooled to approximately 2.7 Kelvin after 13.8 billion years of the universe's growth.The chemical composition of the universe had been determined by astronomers who analyzed the light spectra from distant galaxies, quasars, and stars.
Hydrogen and helium are the two most abundant elements, with trace amounts of other elements. The CMB radiation spectrum is close to that of a blackbody, with small fluctuations in intensity and temperature over the whole sky. It is as though the CMB is radiation from a time in the early universe when it was last in thermal equilibrium.
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Urgent
Please write the complete answer
Answers
Multiply field strength (N/kg) by mass (kg) to get weight (N)
At the start, the car is carrying
4.7 kg * (9.8 N/kg) = 46.06 N
of fuel.
At the end, it is carrying
3.0 kg * (9.8 N/kg) = 29.4 N.
Assuming the car remains completely intact, its weight was reduced by
46.06 N - 29.4 N = 16.66 N.
Only the sun and other stars in space generate these kinds of waves:
Answers
Answer:
Ultraviolet Waves.Explanation:
The Sun emits waves called "Solar Waves", which have a wavelengths between 160 and 400 nanometers. According to the electromagnetic spectrum, these waves are defined as Ultraviolet, which have a frequency around the order of \(10^{16}\), which is really intense and high energy.
Therefore, the answer is Ultraviolet Waves.
A bobsled with two passengers, total mass of 245 lbm, races down a hillside that maintains a constant 32 percent slope. Neglecting air and snow friction, what will be the speed (mph) of the bobsled, when it has traveled 145 ft alone the slope. (g, 32.2 fus? 16.5
Answers
the speed of the bobsled when it has traveled 145 ft along the slope is 57.1 mph.
What is the speed of the bobsled when it has traveled 145 ft along the slope?
A bobsled with two passengers, total mass of 245 lbm, races down a hillside that maintains a constant 32 percent slope. Neglecting air and snow friction, what will be the speed (mph) of the bobsled, when it has traveled 145 ft alone the slope?Given that,Total mass of passengers and bobsled = 245 lbmSlope = 32%Distance traveled = 145 ftSpeed of the bobsled has to be calculated.When the bobsled with two passengers traveled a distance of 145 ft along the slope, it has done some work.
The work done on the bobsled along the slope is converted into kinetic energy.So,1/2m*v² = m*g*hHere, the height gained by the bobsled along the slope ish = l*sinθWhere, l = distance traveled along the slope and θ = slope of the bobsled∴ h = 145*sin32°h = 77.96 ftSo,1/2*(m)*v²
= m*g*h
v² = 2*g*h
v = sqrt(2*g*h)
Here, g = 32.2 ft/s²
= 16.5 mph/s
v = sqrt(2*16.5*77.96)
v = 57.1 mph
Hence, the speed of the bobsled when it has traveled 145 ft along the slope is 57.1 mph.
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A two-resistor series circuit has an applied voltage of 100 V. The voltage across one of the resistors is 40 V. The voltage across the other resistor is _____.
Answers
Given that you have a two-resistor series circuit with an applied voltage of 100 V, we can use the principle of voltage distribution in a series circuit to determine the voltage across the second resistor.
In a series circuit, the total applied voltage is distributed across all the resistors. The voltage across each resistor is directly proportional to its resistance. In this case, we know the voltage across one resistor is 40 V.
Using the principle of voltage distribution, we can calculate the voltage across the other resistor as follows:
Total applied voltage = Voltage across resistor 1 + Voltage across resistor 2
100 V = 40 V + Voltage across resistor 2
Now, we can solve for the voltage across resistor 2:
Voltage across resistor 2 = Total applied voltage - Voltage across resistor 1
Voltage across resistor 2 = 100 V - 40 V
Voltage across resistor 2 = 60 V
So, the voltage across the other resistor in the series circuit is 60 V.
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what impulse does the force shown in the figure exert on a 250 g particle?
Answers
To answer your question, we first need to know what force is shown in the figure and in what direction it is acting. Once we have this information, we can calculate the impulse that this force exerts on the 250-g particle.
Assuming that the force is shown as a vector and that we know its magnitude and direction, we can use the formula for impulse, which is given by the product of force and time. Specifically, impulse equals force times the time interval during which the force acts on the object.
If we know that the force is acting on the particle for a certain amount of time, we can calculate the impulse it exerts on the particle. For example, if the force is 10 N and acts on the particle for 5 seconds, the impulse would be 50 Ns (Newton seconds).
However, if we don't have information about the time interval during which the force acts, we can't calculate the impulse.
In conclusion, we need more information about the force and the time interval during which it acts in order to calculate the impulse that it exerts on the 250 g particle.
To find the impulse exerted on a 250-g particle by the force shown in the figure, you'll need to follow these steps:
1. Convert the mass of the particle from grams to kilograms: 250 g = 0.25 kg.
2. Identify the force exerted on the particle in the given figure.
3. Determine the time interval over which the force acts on the particle.
4. Use the impulse-momentum theorem, which states that impulse (J) is equal to the product of the force (F) and the time interval (t): J = F t.
5. Calculate the impulse using the values of force and time interval obtained from the figure.
Remember to include the force and time interval values from the figure in your calculations to get an accurate answer.
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why would drugs that come from plants be safer than the drugs that are manufactured in a laboratory
Answers
Answer:yes
Explanation:
yes
Answer:
because they are natural does this help?:)
Explanation:
A wire that is 0.36 meters long moves perpendicularly through a magnetic field at a speed of 0.21 meters/second. The induced emf produced in the wire is 0.45 volts. What is the magnetic field strength?
A.
0.034 newtons/amp·meter
B.
0.17 newtons/amp·meter
C.
0.26 newtons/amp·meter
D.
0.77 newtons/amp·meter
E.
6.0 newtons/amp·meter
Answers
Answer:
the answer is letter D.
Explanation:
i hope this is help
Answer:
great answer warstep8! add me on disc colludy#8415
Explanation:
PAGE 29
Q. 1. What is meant by power of accomodation of the eye?
Answers
This is the process of changing the shape of the eye lens to focus on near or distant objects.
Comparing the Motion of Two Cars
Position vs Time
for Two Cars
D
Which statements describe the motion of car A and car
B? Check all that apply.
Car A and car B are both moving toward the origin.
Car A and car B are moving in opposite directions,
Car Ais moving faster than car B.
Car A and car B started at the same location.
Car A and car B are moving toward each other until
they cross over.
B
Position (m)
Time (s)
Answers
B, C, E
Hope this helps
Students perform an investigation using density to determine what kind of wood an oval-shaped block is made of.
One student attaches a lead cube to an oval-shaped piece of wood and submerges them in water, as shown in the
diagram. The lead cube keeps the wood from floating. When the wood is underwater, the water level reads 47
milliliters.
Answers
A student ties a lead cube to an oval-shaped block to prevent it from floating and immerses it in water density as part of a study to identify the sort of wood it is composed of.
What is the name of density?The term "density" (also known as "volumetric mass density" or "specific mass") refers to a substance's mass per unit of volume. Although the Latin letter D may also be used, the sign most frequently used for density is (the lower case Greek letter rho).
Who discovered density?According to legend, Archimedes shouted "Eureka!" as he rushed through the Sicilian streets. ("I've discovered it!") He had figured out what density was. Everyone has spent a significant amount of time in water during their life. The second thing Archimedes noticed was that he felt lighter floating.
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which parameter has the most influence in changing air pressure?
Answers
The temperature parameter has the most influence in changing air pressure.
The reason for this is that air molecules expand when heated and compress when cooled. When air molecules are heated, they gain energy and begin to move more rapidly. This increased movement causes the molecules to collide with each other more frequently, creating more force and pressure. On the other hand, when air molecules are cooled, they lose energy and begin to move more slowly.
This decreased movement causes the molecules to collide with each other less frequently, creating less force and pressure. Thus, the temperature parameter has a direct impact on air pressure by changing the speed and frequency of air molecule collisions.
The temperature parameter has the most influence in changing air pressure because air pressure is caused by the force exerted by air molecules colliding with each other and with surfaces. When the temperature of air changes, the speed and frequency of air molecule collisions also change, which in turn affects air pressure.
Temperature changes can be caused by many factors, including changes in solar radiation, humidity, and altitude. For example, on a hot summer day, the sun heats the air near the ground, causing the air to rise and creating an area of low pressure. This low pressure system then draws in cooler air from surrounding areas, which can lead to thunderstorms and other weather phenomena.
The temperature parameter has the most influence on air pressure because it directly affects the speed and frequency of air molecule collisions, which are the fundamental cause of air pressure.
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3 ways objects can be grouped are
Answers
Answer:
Transparent = lets light pass through without significant interference
Translucent = lets light pass through with significant interference
Opaque = Doesn't let light pass, instead absorbs it
5. A plastic bag filled with air has a volume of 0.008 m³. When air in the bag is squeezed into a rigid container, the
mass of the container (with air) increases from 0.02 kg to 0.03 kg. Use the formula, Density=
calculate the density of the air in the bag.
mass
volume
to
Help needed fast
Answers
Answer:
1.25kgm^-3
Explanation:
The difference in the mass of the container is the mass of the air
m(air) =0.03-0.02
=0.01kg
Density = 0.01/0.008
=1.25kgm^-3
Convert 350.0mL at 740 K to its new volume at standard temperature
Answers
Answer:
129.12 ml
Explanation:
If answer is correct feel free to replay me for explanation.
According to the law of conservation of energy, which statement must be
true?
O A. The total energy in a system can only increase over time.
B. Energy that is transformed is neither destroyed nor created.
C. There is only one form of energy
D. Energy can change only from nuclear to chemical.
Answers
Answer:
B
Explanation:
Energy is neither created nor destroyed, the law of conservation states that.