Answer:
A. Rubbing converts neutrons to protons, increasing the charge
Explanation:
Rubbing two objects creates static electricity. It is also known as charging by friction. When two objects having different electron affinity are rubbed together, the one with greater electron attraction rips off the electrons from other object. In this way charge is transferred from one to another. The one losing the electrons becomes positively charged and the one gaining the electrons becomes negatively charged. Neutrons do not convert to protons. Thus, this is a wrong statement.
At its nucleus, the milky way galaxy is about 100,000 light-years wide and _____.
At it's nucleus,the milky-way galaxy is about 100,000 light-years wide and 10,000 light-years thick
hope this helps
A voltage source in a circuit provides electrical _________.
From an ethical standpoint, which best describes why new biotechnology products should be tested extensively before they are allowed to be used?
(2 points)
There can be unintended consequences to many new biotechnology products.
Many new products end up being more expensive than they appear to be.
Biotechnology products tend to stop working after a few years.
There are usually no benefits to the products of biotechnology.
Its actually A. I did the same question and A was the correct answer.
There can be unintended consequences to many new biotechnology products so they should be tested extensively before allowed to be used. Option A is correct.
Biotechnology:
It is a field of science that use principles of technology and biology to improve the human lives.
For example-
Vaccines are produced by using the principles of biotechnology.Immunotherapy drugs are also produced by the biotech companies.The effect of biotechnology products in a long term manner cannot be predicted.Therefore, there can be unintended consequences to many new biotechnology products so they should be tested extensively before allowed to be used.
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Where must an object be placed to form an image 30.0 cm from a diverging lens with a focal length of 43.0 cm?
A bus moves with 500000joules the driver applies brakes how much work is needed for the bus to stop
What type of collision is it if it bouunces of of each oyher?
If element "X" is heavier than element "Y" then...
Question 4 options:
A.) Element "X" must be a metal.
B.) Then Element "X" must be on the right side of the periodic table.
C.) Element "X" must have more particles in the nucleus than Element "Y."
D.) Element "X" must have a higher melting point than Element "Y."
While some aspects are based on ____, body composition is largely a result of ____,
A. BMI;BMR
B. Diet;Excercise
C. Heredity;Lifestyle
D. Lifestyle;Heredity
Answer : Option C) Heredity; Lifestyle.
Explanation : While some aspects are based on heredity, body composition is largely a result of Lifestyle.
Even though it is believed that 80 percent of the aspects of a human body is heredity, but an individual body composition is largely influenced by the result of the lifestyle an individual lives.
A ray of light passes from air into carbon disulfide (n = 1.63) at an angle of 28.0 degrees to the normal. what is the refracted angle?
The image shows a pendulum that is released from rest at point A. Which energy transformation is correct? From A to C, kinetic energy is transformed into gravitational potential energy. From C to D, kinetic energy is transformed into gravitational potential energy. From C to E, gravitational potential energy is transformed into kinetic energy. From D to E, gravitational potential energy is transformed into kinetic energy.
Answer:
Partially: From C to D, kinetic energy is transformed into gravitational potential energy and From D to E, gravitational potential energy is transformed into kinetic energy
Explanation:
What happens in this pendulum is that at point A, there's only gravitational potential energy (no velocity=no kinetic energy)
At point C, it has maximum speed since all of the potential energy is transformed into kinetic energy (no potential gravitational energy at this point)
At point E, it is the same as at point A. (no kinetic energy)
At the intermediate points (B and D) there are both kinetic and potential energy. At point B the kinetic energy is increasing and at point D it is decreasing.
Now let's see each case:
- From A to C, kinetic energy is transformed into gravitational potential energy: It is actually the opposite, so no.
- From C to D, kinetic energy is transformed into gravitational potential energy: Yes, but not all of it is transformed since it still has kinetic energy that allows it to get til point E.
- From C to E, gravitational potential energy is transformed into kinetic energy: No, it is the opposite.
- From D to E, gravitational potential energy is transformed into kinetic energy: Yes, but not all of it, since at point D it also has kinetic energy.
The kinetic energy is transformed into gravitational potential energy from point C to B. But complete transformation is not happening. Thus, the statement is somehow correct.
The analysis of pendulum is given as follows:
At point A, there's only gravitational potential energy and no kinetic energy, because the pendulum is at rest at A. At point C, it has maximum speed since all of the potential energy is transformed into kinetic energy. Therefore, at this point there is only kinetic energy and no potential energy. At point E, it is the same as at point A, but in opposite side. So, at this point there is no kinetic energy. At points B and D there are both kinetic and potential energy. At point B the kinetic energy is increasing and at point D it is decreasing.
Now as per the given statements:
From A to C, kinetic energy is transformed into gravitational potential energy. It is actually the opposite. Thus, the statement is incorrect. From C to D, kinetic energy is transformed into gravitational potential energy. At this interval, the kinetic energy is converting into potential energy but the conversion is not complete. Thus, the statement is somehow correct. From C to E, gravitational potential energy is transformed into kinetic energy. At this point, the kinetic energy is converting into the potential energy. Thus, the statement is incorrect. From D to E, gravitational potential energy is transformed into kinetic energy. This statement incorrect because there is conversion of kinetic energy into potential energy.Thus, we can conclude that from C to D, the kinetic energy is transformed into gravitational potential energy, but the transformation is not complete. Hence, statement (B) is correct.
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what is the difference between series and parallel circuits and examples of when you would use them ?
According to charles' law, the volume of a fixed amount of gas is directly proportional to
According to Charles's law, the volume of a fixed amount of gas is directly proportional to its Kelvin temperature, assuming constant pressure. It means that volume of the gas increases with increase in temperature and decreases with decrease in temperature.
Explanation:According to Charles's law, the volume of a fixed amount of gas is directly proportional to its Kelvin temperature when the pressure is held constant. This law was named after the French scientist Jacques Alexandre César Charles, a pioneer in balloon flight. It essentially means that when the temperature of gas increases under constant pressure, the volume of the gas also increases and vice versa.
For instance, if you raise the gas temperature from 283 K to 303 K at a constant pressure, you will see an increase in its volume from 0.300 L to 0.321 L, corroborating Charles's law.
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A sound from a source has an intensity of 270 dB when it is 1 m from the source.
What is the intensity of the sound when it is 3 m from the source?
30 dB
90 dB
810 dB
2430 dB
Alpha century is 4 light years from earth how long would it take for light form alpha centauri to reach earth
Given:
Distance of alpha century = 4 light year
Speed of light = 3 × [tex] 10^{8} [/tex] m
To find:
Time taken by light to reach earth = ?
Formula used:
Distance = speed × time
Solution:
Distance = 4 light year
Converting distance from light year into meter
1 light year = 365 × 24 × 60 × 60
4 light year = 4 × 365 × 24 × 60 × 60× 3 ×[tex] 10^{8} [/tex]
As we know,
Distance = speed × time
s = v × t
Where s = distance
v = velocity
t = time
So,t = [tex] \frac{s}{v} [/tex]
t = [tex] \frac{4 × 365 × 24 × 60 × 60× 3 ×[tex] 10^{8} [/tex]}{3 ×[tex] 10^{8}} [/tex]
t = 4 × 365 × 24 × 60 × 60 second
t = 4 year
Thus, Time taken by light to reach earth from alpha century is 4 earth year.
A ground-fault circuit interrupter is a (an) _____. A)wire that provides an easier path for a current to take if a short circuit develops B) electrical safety outlet that monitors current flowing to and from an appliance C) switch that opens when current in a circuit is too high
B) electrical safety outlet that monitors current flowing to and from an appliance.
What is Ground fault circuit interrupter?A GFCI should be used in any indoor or outdoor area where water may come into contact with electrical products.
The GFCIs be used in all kitchens, bathrooms, garages, and outdoors.
Here,
A ground-fault circuit interrupter is an electrical safety outlet that monitors current flowing to and from an appliance.
The ground-fault circuit interrupter, or GFCI,
It is a fast acting circuit breaker designed to shut off electric power in the event of a ground-fault within as little as 1/40 of a second.
It works by comparing the amount of current going to and returning from equipment along the circuit conductors.
Therefore,
A ground-fault circuit interrupter is an electrical safety outlet that monitors current flowing to and from an appliance.
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A 72 kg sled Is pulled forward from rest by a snowmobile and accelerates at 2 m/s squared forward for five seconds. The force of friction acting on the sled is 120 N backwards. The total mass of the snowmobile and driver is 450 kg. The drag force acting on the snowmobile is 540 N backwards. What is the tension in the rope.
Final answer:
The tension in the rope is 516 N.
Explanation:
To find the tension in the rope, we need to calculate the net force acting on the sled. The net force is equal to the mass of the sled multiplied by its acceleration. Given that the sled has a mass of 72 kg and accelerates at 2 m/s² for 5 seconds, we can use the equation:
Net force = mass x acceleration
Net force = 72 kg x 2 m/s² = 144 N
However, there are two forces acting in the opposite direction - the force of friction (120 N backwards) and the drag force (540 N backwards). So, the net force is:
Net force = 144 N - 120 N - 540 N = -516 N
The negative sign indicates that the net force is acting in the opposite direction of motion. Therefore, the tension in the rope is equal in magnitude and opposite in direction to the net force, so the tension in the rope is 516 N.
A cran uses an average force of 5200N to lift a steel beam 25m. How much work does the crane do on the steal beam.
Please help or explain how to do this anyone. Please and thank youu
A car turns a corner that has a radius of 5 m and experiences a centripetal acceleration of 20 m/s². If the radius of turn were increased to 10 m, calculate the centripetal acceleration.
Answer:
10
Explanation:
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.20×106 N , one at an angle 12.0 ∘ west of north, and the other at an angle 12.0 ∘ east of north, as they pull the tanker a distance 0.700 km toward the north.
For the electric field shown, which of the following statements describes an increase in voltage?
A) A negative charge crosses an equipotential line toward the source charge.
B) You cannot tell from the information given.
C) A positive charge crosses an equipotential line toward the source charge.
D) A positive charge moves along an equipotential line.
UPDATE: ANSWER IS C
Answer:
C
Explanation:
Just took test
A radioactive sample has a count rate of 800 counts per minute. One hour later, the count rate has fallen to 100 counts per minute. What is the half-life of the sample?
How does a gas do work?
A. By changing volume
B. By creating energy
C. By conserving energy
D. By flowing
A gas does work by changing its volume, adhering to the law of conservation of energy and resulting in increases in energy, pressure, and/or temperature.
A gas can do work by changing its volume. When a gas in a cylinder expands, it exerts a force on the piston and moves it, doing work. According to the Ideal Gas Law, work done by a gas results in an increase in its energy, which can manifest as an increased internal kinetic energy due to the motion of its atoms and molecules. This concept adheres to the law of conservation of energy, meaning that energy within a closed system is neither created nor destroyed, but can change forms. An example of work being done by a gas is when you inflate a bicycle tire; the air pressure and temperature increase inside the tire due to the work done by the pump.
Thus, the correct answer to how a gas does work is A. By changing volume.
Which describes constant acceleration in one direction? a baseball moving in a curved path over a fence a basketball at rest a skydiver in free fall a car increasing its speed while moving around a curve
Final answer:
A skydiver in free fall describes constant acceleration in one direction since gravity provides a constant acceleration downwards near Earth's surface.
Explanation:
The question asks which scenario describes constant acceleration in one direction. The correct answer is a skydiver in free fall. This is because, near the surface of the Earth, an object in free fall experiences a constant acceleration due to gravity, with a magnitude of approximately 9.8 m/s².
The direction of this acceleration is vertically downwards, and it remains constant in both magnitude and direction in the absence of air resistance.
In contrast, a car rounding a bend, a merry-go-round increasing speed, or a pendulum swinging all experience changing directions or types of motion which do not represent constant acceleration in one direction.
The change in electric potential energy per unit charge is
A) amperes
B) current.
C) gravity.
D) voltage.
correct. D) Voltage is the change in electric potential energy per unit charge. It is sometimes called the electric potential difference
Voltage is called as the change in electric potential energy per unit charge which is called as the electric potential difference. So, the correct option is D.
What is Voltage?Voltage is also called electric pressure, electric tension or potential difference which is defined as the difference in electric potential between two points. This corresponds to the work required per unit charge to move a test charge between two points in a static electric field.
Voltage is called as the change in electric potential energy per unit charge which is called as the electric potential difference. The SI unit for voltage is Volt which is represented by the letter v which derived SI unit of the electromotive force or electric potential.
Therefore, the correct option is D.
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Your question is incomplete, most probably the complete question is:
The change in electric potential energy per unit charge is
A) amperes
B) current.
C) gravity.
D) voltage
two charges separated a distance of 1.0 meter exert a 1.0-N force on each other If the charges are pushed to a separation of 1/4 meter the force of each charge would be?
Final answer:
The electrostatic force between two charges increases by a factor of 16 when the distance between them is reduced to a quarter of the original distance, resulting in a new force of 16 N.
Explanation:
The question provided deals with the concept of electric force between point charges, which is described by Coulomb's Law. According to this law, the force F between two point charges is directly proportional to the product of the charges q₁ and q₂, and inversely proportional to the square of the distance r between them. Specifically, F = k * (q₁ * q₂) / r², where k is Coulomb's constant.
In the original scenario, two charges exert a 1.0-N force when separated by a distance of 1.0 meters. When the separation is reduced to 1/4 meter (or 0.25 meters), the distance squared term in Coulomb's Law (r²) becomes (0.25)², which is 1/16 of the original distance squared. Since the force is inversely proportional to the square of the distance, decreasing the distance by a factor of 4 (which squares to be a factor of 16) increases the force by that same factor of 16.
Thus, the new force would be 1.0 N multiplied by 16, resulting in a force of 16 N when the charges are 1/4 meter apart.
Magnetic fields are produced by: atoms currents voltages charges
Answer:
curtent
Explanation:
Which of the following would decrease the magnetic field around a wire?
A. decreasing the current
B. reversing the poles of the wire
C. looping a section of the wire into a solenoid
D. increasing the current
Which substances resist pH changes?
Acids
Hydrogen ions
Buffers
Bases
The correct choice is Buffers.
Buffers contains both acids and bases in equilibrium.when base is added to buffers, they adjust the pH value by releasing hydrogen ions.when acid is added to buffers, they adjust the pH value by consuming hydrogen ions. hence these substances resist any change in their pH value by releasing or absorbing hydrogen ions.This process keeps the pH value constant.
Tp-15 water current has the greatest effect on which type of boat?
Answer: Displacement sailboat
Displacement sailboat are stable even in strong water current for it was designed to glide through the water smoothly with a minimum of power for they have smooth lines and curves that gently move water out of its way. In displacement boat, the water moves gradually where less resistance against the boat is created and the boat ride is smooth and safer.
At an ocean depth of 10.0 m, a diver’s lung capacity is 2.40 l. the air temperature is 32.0°c and the pressure is 101.30 kpa. what is the volume of the diver’s lungs at the same depth, at a temperature of 21.0°c and a pressure of 141.20 kpa?
Answer:
V = 1.66 L
Explanation:
As we know that at the depth of 10 m the volume of the lungs of diver is given as
V = 2.40 L
Temperature = 32 degree C
Pressure = 101.30 kPa
Now we have change the values of pressure and temperature
Pressure = 141.20 kPa
Temperature = 21 degree C
Now we can use idea gas equation to solve this
[tex]PV = nRT[/tex]
[tex]\frac{P_1V_1}{RT_1} = \frac{P_2V_2}{RT_2}[/tex]
so we have
[tex]\frac{101.30 \times 2.40}{R(273 + 32)} = \frac{141.20 \times V}{R(273 + 21)}[/tex]
[tex]V = 1.66 L[/tex]