The female scientist who was overlooked by the Nobel Committee in the Nobel Prize for photographic method of studying nuclear processes is Rosalind Franklin.
Rosalind Franklin is best known for her contribution to the discovery of the structure of DNA. She was a British biophysicist and X-ray crystallographer who made significant contributions to the study of DNA. Franklin used X-ray crystallography to develop images of DNA, which helped the other scientists working on the DNA model to construct the double helix structure.
Franklin died at the age of 37, before the Nobel Prize for discovering the structure of DNA was awarded to James Watson, Francis Crick, and Maurice Wilkins. While Watson and Crick are credited with discovering the structure of DNA, it is well-known that Franklin's work, especially her X-ray crystallography images, were instrumental in the discovery.
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Joe places two solid objects in contact with each other.
Which property determines the direction of the flow of heat between the two objects?
Select all the true
A
density of the objects
B
temperature of the objects
C
material of the objects
D
volume of the objects
Answer:
B. temperature of the objects
To what subnet does the ip address 10.1.100.50 belong if a subnet mask of 255.255.0.0 is used?
The IP address 10.1.100.50 belongs to the subnet 10.1.0.0 when a subnet mask of 255.255.0.0 is used.
When the subnet mask 255.255.0.0 is applied, it indicates that the first two octets (10.1) are the network address, and the last two octets (100.50) are available for host addresses within that network. This subnet mask allows for a larger number of host addresses compared to a subnet mask with a higher number of network bits.
By matching the network portion of the IP address with the network address derived from the subnet mask, we can determine the subnet to which the IP address belongs. In this case, the subnet is 10.1.0.0.
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which of the following is a correct statement of the ohm's law? responses a. the resistance of a conductor is always constant. a. the resistance of a conductor is always constant. b. the current in a conductor is always proportional to the potential difference across the conductor. b. the current in a conductor is always proportional to the potential difference across the conductor. c. the resistance of a conductor increases with increasing temperature. c. the resistance of a conductor increases with increasing temperature. d. the resistance of a conductor is constant only if the temperature of the conductor is constant.
Correct statement of the ohm's law is the current in a conductor is always proportional to the potential difference across the conductor.
What is Ohm's law's resistance?According to Ohm's law, the voltage across two places is precisely proportional to the current flowing through a conductor between them. As a result, V = RI, where R is the resistance constant. R is influenced by the conductor's material, size, and other factors. Ohm () is its SI unit.In accordance with Ohm's law, as the current increases, the voltage will follow suit. So, the appropriate choice is As resistance rises, current rises. Ohm's Law Declaration: According to Ohm's law, when all other physical parameters, including temperature, are held constant, the voltage across a conductor is directly proportional to the current flowing through it.To learn more about ohm's law refer to:
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explain how a roller coaster functions using gravity and momentum. Why does it not need an engine or a motor to speed it up and slow it down?
Answer:
because it will help it go and funcion more
Explanation:
Answer:
It uses graivity and momentum because since we all know, gravity pulls things down, they have a chaint hat lifts the carts up, and then when it gets to a top, it releases it. When it goes down very high, it will go faster. Then it uses momentum when it goes up, then down again, or a loop to regain speed. IT doesn't need a engine or a motor to speed it up or slow it down because gravity and momentum is already doing the job a engine could. Like I said, when it is high in the sky and released, it goes down in incredible speed. And when it needs more speed to keep the ride going, it can add a loop or tight turns to increase it more.
Motion happens when what
Answer:Forces cause motion. ... To move something, you need to apply a push or a pull, which is, by definition, a force. Without a force, the object will be immobile, or keep moving without speeding up
Brainlist plz!
Part one objects with masses of 207 kg and 516 kg are separated by 0.482 m. a 31.8 kg mass is placed midway between them. find the magnitude of the net gravitational force exerted by the two larger masses on the 31.8 kg mass. the value of the universal gravitational constant is 6.672 × 10−11 n · m^2/kg^2. answer in units of n. part two leaving the distance between the 207 kg and the 516 kg masses fixed, at what distance from the 516 kg mass (other than infinitely remote ones) does the 31.8 kg mass experience a net force of zero? answer in units of m.
It has been determined that the 31.8 kg mass experiences a net gravitational force of 1.129105 N from the two larger masses.
What is Magnitude?The absolute or relative direction or size of an object's motion in the sense of motion can be used to define magnitude. It is extensively utilized to convey something's size or scope. In physics, the term "magnitude" typically means "distance" or "quantity."
Elaborating:Take the right to be positive. Sum of forces on the 31.8 kg mass:
∑F = GM₁m / r₁² − GM₂m / r₂²
∑F = G (M₁ − M₂) m / r²
∑F = (6.672×10⁻¹¹ N kg²/m²) (516 kg − 207 kg) (31.8 kg) / (0.482 m / 2)²
∑F = 1.129×10⁻⁵ N.
Repeating the same steps, the second part this time ∑F = 0 and we're solving for r.
∑F = GM₁m / r₁² − GM₂m / r₂²
0 = GM₁m / r₁² − GM₂m / r₂²
GM₁m / r₁² = GM₂m / r₂²
M₁ / r₁² = M₂ / r₂²
516 / r² = 207 / (0.482 − r)²
516 (0.482 − r)² = 207 r²
516 (0.232 − 0.964 r + r²) = 207 r²
119.9 − 497.4 r + 516 r² = 207 r²
119.9 − 497.4 r + 309 r² = 0
r = 0.295 or 1.315.
It is found that r can't be greater than 0.482, so r must be equal to 0.295 m.
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[04.04] Which best describes the current atomic theory?
What would the velocity of the object be at time = 50s
Which of the following does not change as a skater goes down a ramp?
-Thermal Energy
-Gravitational potential energy
-Total Energy
-Kinetic Energy
Answer:
total energy
Explanation:
law of conservation of energy
Who else got stuck on a question and is NOT ready for test return at 2? its 1:58 AAAAAAA
1.
David is 10% taller than Peter and Peter is 5% shorter than John. It is given that the height of Peter
is 171 cm.
(a) Find the height of John.
Iso
(2 marks)
(b) David claims that he is the tallest person among the three. Do you agree? Explain your answer.
(2 marks)
Answer:
I don't know if I can help you with that
what is drop in mililiter?
20 drops per millilitre. Example: To convert 15 drops to millilitres, multiply by 0.05 to get 0.75 mL.
A drop is a unit of volume commonly used in medicine and cooking. The volume of a single drop can vary depending on factors such as the size of the dropper or the liquid being measured, but a commonly accepted standard is that one drop is equal to approximately 0.05 milliliters (mL).
It's important to note that relying on drops as a precise measurement can be problematic, as variations in dropper size, liquid viscosity, and other factors can cause significant variations in the actual volume of a drop. For this reason, it's often more accurate to use graduated measuring devices like syringes or graduated cylinders when precise measurements are required.
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. a 30 newton stone is dropped from a height of 10 m and strikes the ground with a speed of 13 m/s. what average force of air friction acted on the stone as it fell?
The average force of air friction that acted on the stone as it fell is 8.72 N.
The resistance experienced by an object when passing through the air is known as air friction. The force of air resistance is proportional to the speed of the object moving through the air. The faster an object travels, the greater the resistance it experiences. It can be computed using the following formula:
F = 1/2pv²CdA,
Where F is the force of air resistance, p is the density of the air, v is the velocity of the object, Cd is the drag coefficient, and A is the surface area of the object.
The formula for gravitational potential energy is:
PE = mgh
where m is the mass of the object, g is the acceleration due to gravity (9.8 m/s²), h is the height the object was dropped from
Let us determine the velocity of the object upon impact. The formula for finding the velocity of an object that falls from a height is:
v² = u² + 2gh
where v is the final velocity, u is the initial velocity (which is zero in this case), g is the acceleration due to gravity (9.8 m/s²), h is the height the object was dropped from
Substitute the values into the formula:
v² = 0 + 2(9.8)(10)
v² = 196
v = √196
v = 14 m/s
Therefore, the final velocity of the object is 14 m/s.
Let us now calculate the force of air resistance using the formula:
F = 1/2pv²CdA
where F is the force of air resistance, p is the density of the air (1.2 kg/m³ at sea level), v is the velocity of the object (14 m/s), Cd is the drag coefficient (for a sphere it is 0.47), A is the surface area of the object (for a sphere it is πr²)
Substitute the values into the formula:
F = 1/2 × 1.2 × 14² × 0.47 × π(0.5²)
F = 8.72 N
Therefore, the average force of air friction that acted on the stone as it fell is 8.72 N.
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The force pulling the moon toward Earth depends on the mass of the two bodies and which factor?.
Pushing a shopping cart is what type of friction
Parked car is what type of friction
400 N of load can be overcome by an effort of 50 N by using a lever. Calculate the mechanical advantage of the lever.
Answer:
load (l)=400N
Effort(E)=50N
mechanical advantage (MA)= load ÷Effort
(ma)=400÷50
(ma)=8
Explanation:
I copy pasted from the answer from the same question. Remember to first check if ur question is there
Which quotations addresses the audience concern that
president obama should not take anymore actions at the end of
his term while he is waiting for president trump to take office?
select one:
"over the last eight years, we've delivered on that promise in many
ways, both big and small, including, of course, providing health
coverage to 20 million more americans, and making health care
more affordable for all americans."
"i told you we would unleash american innovation and technology to
tackle the health challenges of our time."
"it's an opportunity to save lives, and an opportunity we just can't
miss."
"first, it will make real investments this year to combat the heroin
and prescription drug epidemic that's plaguing so many of our
communities."
"over the last eight years, we've delivered on that promise in many ways, both big and small, including, of course, providing health coverage to 20 million more Americans and making healthcare more affordable for all Americans."
Which quotation addresses the audience concern that President Obama should not take anymore actions at the end of his term while waiting for President Trump to take office?The quotation that addresses the audience's concern about President Obama taking actions at the end of his term while waiting for President Trump to take office is:
"over the last eight years, we've delivered on that promise in many ways, both big and small, including, of course, providing health coverage to 20 million more Americans and making healthcare more affordable for all Americans."
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Noise is any disturbance that interferes with the transmission of a message, and it can occur in any medium.a. Trueb. False
It is true that noise may arise in any media and refers to any disruption that prevents a message from being sent.
What is a noise, exactly?Noise is unwelcome audio. The listener and the situation determine the distinction between sound and noise. One individual might discover enjoyment in rock music while another could find it bothersome.
What kind of noise are there?One-impulse noises include the bang of a door, a slap of such a fist on a table, and the clapped of a hand. Other examples include the sound of a phone ringing, birds tweeting, sirens, or even a computer buzzing.
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what are base unit involved in joule? How?
the SI unit of energy is the joule (J) . the joules has base units of kg•m^2/s^2=N•m. A joule is defined as the work done or energy required to exert a force of one Newton for a distance of one metre.
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terry knew that to replace the volume control on the radio he would need to find what sort of potentiometer
Rheostats can conduct higher currents replace the volume control on the radio.
Determine the volume control?To replace the volume control on the radio, Terry needed to find a potentiometer suitable for the task. In this case, he should look for a potentiometer, denoted as a variable resistor, capable of conducting higher currents, which is a characteristic of rheostats.
Rheostats are a specific type of potentiometer designed to handle higher current loads, allowing for effective volume control in electronic devices like radios.
By using a rheostat as the replacement for the volume control, Terry can ensure that the potentiometer can handle the current requirements without overheating or causing damage to the radio circuitry.
Rheostats offer the flexibility to adjust the resistance and current flow, making them ideal for applications where higher currents need to be regulated, such as volume controls in electronic devices.
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when a star undergoes a nova explosion, it may return to its â quiet stateâ and later become a nova again. what would allow a nova explosion to happen to a star more than once?
1. Compare the speed that light waves travel in air to the speed that sound waves travel in the air. How many times faster do light waves travel in air in comparison to sound waves in air?
Water-1500 meters per second
steel-5000 meters per second
Air-335 meters per second
Answer:
895522 times faster.
Explanation:
From the question given above, the following data were obtained:
Speed of sound in air (v) = 335 m/s
Speed of light in air (c) = 3×10⁸ m/s
How many times faster =.?
To obtain how many times faster light travels in air than sound, do the following
c : v => 3×10⁸ : 335
c/v = 3×10⁸ / 335
c/v = 895522
Cross multiply
c = 895522 × v
From the illustrations made above, we can see that the speed of the light in air (c) is 895522 times the speed of sound in air.
Thus, light travels 895522 times faster than sound in air.
what is the volume in cubic metres of a cube of side 2.8 cm
volume of cube is 21.952 cubic metre
Volume = a3, where an is the length of the cube's sides or edges, is the formula for the cube's volume.
Height =Breadth =Length equals a. As a result, an is the length of each cube edge. The volume of cube formula is therefore ax ax a = a3. The number derived using the cube formula is the ideal cube number, it should be emphasized.
Volume of cube = ( cube of side ) ³
volume of cube = (2.8)³
volume of cube = 2.8 x 2.8 x 2.8
volume of cube = 21.952 cubic metre
volume of cube is 21.952 cubic metre
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If the andromeda galaxy collided with the milky way, what would most likely happen to earth?.
Answer:
the surface of the earth would've already turned into a very hot liquid water to even exist and there would be no existence of humans on earth
6.1. start with the default parameters, drag the ball to the maximum starting position (10 m) and hit play. how does this motion compare with simple harmonic motion (in the last chapter)?
Hi! When you drag the ball to the maximum starting position (10 m) and initiate the motion, you are setting up a scenario similar to simple harmonic motion.
In simple harmonic motion, an object oscillates back and forth around an equilibrium point due to a restoring force proportional to its displacement from that point.
Comparing the motion you described to simple harmonic motion, we can observe the following similarities:
1. Both motions involve an object moving back and forth around an equilibrium point.
2. Both motions have a starting position, where the object is at its maximum displacement from the equilibrium point.
3. The restoring force in both motions tries to bring the object back to its equilibrium position.
In summary, the motion you set up by dragging the ball to the maximum starting position (10 m) and hitting play shares several key characteristics with simple harmonic motion, such as oscillation around an equilibrium point and a restoring force acting on the object.
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The electric current in which electrons move at an even rate and flow only in one direction is called a: a) load b) closed circuit c) general shock d) direct current.
Electric current is the flow of electric charge through a conductor. This flow of charge can occur in different ways, resulting in different types of current. In direct current (DC), the electrons move at an even rate and flow only in one direction. In other words, the flow of charge is unidirectional, from the negative terminal to the positive terminal of a source of electricity, such as a battery or a generator.
In a DC circuit, the direction of the current remains the same over time, unlike in alternating current (AC) circuits, where the direction of the current changes periodically. DC is commonly used in electronic devices and equipment that require a constant and reliable flow of electrical energy. For example, batteries, electronic circuits, and some motors use DC.
DC is also used in certain applications where the flow of current needs to be controlled in one direction only. For example, in electroplating, where a metal is deposited onto a surface by an electric current, DC is used to ensure that the metal ions move in one direction only and are deposited uniformly on the surface.
In summary, DC is a type of electric current in which the flow of electrons is unidirectional, moving from the negative to the positive terminal of a source of electricity. It is commonly used in electronic devices and equipment that require a constant and reliable flow of electrical energy.
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radiation hazards in the workplace fall into three categories alpha beta and gamma. True or False
TRUE, alpha beta and gamma radiations cause hazards in the workplace.
Radiation is a process in which energy is transmitted through space or matter. Radiation is emitted by unstable atomic nuclei, which lose energy by emitting particles or electromagnetic waves. Radiations emitted by atomic nuclei are known as radioactive radiations.
The three types of radiations are alpha, beta, and gamma.
Alpha radiation: Alpha radiation consists of alpha particles, which are helium nuclei consisting of two protons and two neutrons. Alpha particles are heavy and have a low penetrating power. They can be blocked by a sheet of paper or human skin.
Beta radiation: Beta radiation consists of beta particles, which are high-energy electrons or positrons. Beta particles have a higher penetrating power than alpha particles. They can be blocked by a few millimeters of aluminum or plastic.
Gamma radiation: Gamma radiation consists of gamma rays, which are high-energy electromagnetic waves. Gamma rays have the highest penetrating power of all the three types of radiation. They can be blocked by several centimeters of concrete or lead.
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A 3 ohm heater takes 6 amperes while submerged in 1200 grams of water contained in a vessel with a water equivalent to 200 grams. What is the efficiency of the system if the time required for the temperature to change by 70 degrees Celsius is 3.95 hours?
The efficiency of the system, consisting of a 3-ohm heater submerged in 1200 grams of water, is approximately 101.2% based on the given information.
To determine the efficiency of the system, we need to calculate the energy input and the energy output.
The energy input is given by the formula: Energy input = Voltage × Current × Time
Since the heater has a resistance of 3 ohms and operates at 6 amperes for 3.95 hours, we can calculate the energy input as follows:
Energy input = (Voltage × Current) × Time = (Voltage² / Resistance) × Time
Given that the voltage is unknown, we need to solve for it. We can use Ohm's law to find the voltage: Voltage = Current × Resistance = 6 A × 3 Ω = 18 V
Now we can calculate the energy input: Energy input = (18² / 3) × 3.95 = 381.6 Joules The energy output can be calculated using the specific heat capacity of water and the change in temperature: Energy output = (Mass of water + Water equivalent) × Specific heat capacity × Change in temperature
Given that the mass of water is 1200 grams, the water equivalent is 200 grams, the specific heat capacity of water is approximately 4.18 J/g°C, and the change in temperature is 70°C, we can calculate the energy output: Energy output = (1200 + 200) × 4.18 × 70 = 386,360 Joules
Finally, we can calculate the efficiency of the system: Efficiency = (Energy output / Energy input) × 100 Efficiency = (386,360 / 381.6) × 100 ≈ 101.2% Therefore, the efficiency of the system is approximately 101.2%.
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Which two factors affect the amount of force seen in objects?
Answer:thanks
Explanation:xixo
gv
A switch can send and receive on all circuits simultaneously. True or False.
False. A switch cannot send and receive on all circuits simultaneously.
In networking, a switch is a device that connects multiple devices within a local area network (LAN). It operates at the data link layer of the network protocol stack and uses MAC addresses to forward data packets to the appropriate destination.
A switch can handle multiple ports and can transmit data to multiple devices simultaneously, but it does so through a process known as **packet switching**. Packet switching involves the switch forwarding individual data packets to their intended destinations based on their MAC addresses.
While a switch can handle multiple connections and facilitate communication between devices, it operates in a sequential manner, forwarding packets one at a time based on their destinations. It cannot simultaneously send and receive data on all circuits or ports simultaneously. Each connection or port on a switch operates independently and can handle traffic in a time-division multiplexing manner, but not simultaneously on all circuits.
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