Materials having resistance changes as voltage or current varies are called:
What particles make up a plasma of hydrogen?
A) H+ only
B) H+ and e-
C) e- only
Which feature of the sun extends into the corona but is anchored in the photosphere? Core Prominence Solar flare Sunspot
The answer is solar flare. Solar flares are commonly accompanied by coronal mass ejection. Solar flares are periods when the sun is suddenly brighter at a spot at its surface. This is due to the ejection of electrons, ions, and atoms (plasma clouds) accompanied by electromagnetic waves.
Answer: Solar flare
Explanation:
Which statement about conduction is true?
1. Conduction uses electromagnetic waves.
2. Conduction transfers energy from one particle to another
3. Conduction from a fireplace can heat an entire room.
Monochromatic light with a wavelength of 384 nm passes through a single slit and falls on a screen 86 cm away. If the distance of the first-order dark band is 0.22 cm from the center of the pattern, what is the width of the slit?
Answer in units of cm.
The slow, steady downhill flow of loose, weathered Earth materials is called A. flow. B. slide. C. creep. D. slump.
Electrical energy is produced by power plants. Then, it is transferred to our homes through wires. What happens to the electrical energy when it passes through a household device such as a blender or a toaster? A. It is immediately dispersed through the surroundings. B. It doesn't pass through household devices. C. It remains electrical energy. D. It is transformed into another form of energy.
Electrical energy is transformed into other forms of energy such as mechanical or thermal when passing through household devices like blenders or toasters.
When electrical energy passes through a household device such as a blender or a toaster, it is transformed into another form of energy. This process is known as energy transformation. For instance, in a blender, the electrical energy is converted into mechanical energy to spin the blades, and in a toaster, it is transformed into thermal energy to heat the bread. This transformation of energy allows the appliances to perform their respective functions.
The deepest portion of the lithosphere is formed from
A weight lifter holds 100 kg above his head for 5 seconds. What is the work done on the weights?
A 50 kg astronaut ejects 100 g of gas from his propulsion pistol at a velocity of 50 m/s.what is his resulting velocity
Final answer:
Applying the conservation of momentum, the 50 kg astronaut ejecting 100 g of gas at 50 m/s in space will have a resulting velocity of 0.1 m/s in the opposite direction.
Explanation:
To calculate the resulting velocity of the 50 kg astronaut after ejecting 100 g of gas at a velocity of 50 m/s, we apply the principle of conservation of momentum, assuming a frictionless environment such as space. Before ejection, the astronaut and the gas are stationary, so their combined momentum is 0 kg*m/s. After the ejection, the momentum remains 0 kg*m/s, which means that the momentum gained by the astronaut is equal and opposite to the momentum of the ejected gas.
The mass of the ejected gas is 0.1 kg (100 g) and its velocity is 50 m/s, giving it a momentum of 0.1 kg * 50 m/s = 5 kg*m/s. To find the astronaut's velocity (v_astronaut), we use the equation:
Momentum of astronaut = - (Momentum of gas)
50 kg * v_astronaut = - (0.1 kg * 50 m/s)
This simplifies to:
v_astronaut = - (0.1 kg * 50 m/s) / 50 kg
Calculating this gives:
v_astronaut = - (5 kg*m/s) / 50 kg
So, v_astronaut = -0.1 m/s. The negative sign indicates the direction opposite to the ejected gas.
Therefore, the astronaut's resulting velocity is 0.1 m/s in the direction opposite to the direction of the ejected gas.
Describe how a lever can increase the force applied without changing the amount of work being done
A lever increases applied force by offering a mechanical advantage, which redistributes the force over a longer distance but does not change the overall work done, as work is the product of force and distance which remains constant.
A lever can increase the force applied without changing the amount of work being done by reallocating the distance over which the force is applied. The mechanical advantage provided by a lever allows a smaller input force to lift a heavier load. However, as with all machines, the lever does not change the amount of mechanical work done. This means that a lever that increases force will decrease the distance that the load moves, and the product of the force applied and the distance moved (work) remains constant. The mechanical advantage of the lever is the ratio of these forces, and it demonstrates how a simple machine outputs the same amount of work with a reduced effort force by increasing the distance over which the effort force is applied.
In practice, for instance, when we use a crowbar to lift a heavy object, we apply a small force over a larger distance at one end of the lever (the effort arm), and the crowbar applies a larger force over a shorter distance at the other end (the resistance arm) to lift the object. The work done remains the same since it is the product of force and distance.
A girl attaches the end of her jump rope to the trunk of a tree. What evidence exists that the rope is a transverse wave?
Final answer:
The motion of moving the jump rope up and down creates transverse waves where the rope moves perpendicular to the direction of wave propagation. When waves from opposite ends meet, they interfere and superpose, forming various resulting wave patterns.
Explanation:
When a girl attaches the end of her jump rope to the trunk of a tree, evidence that the rope can support a transverse wave is observed by moving the free end of the rope up and down. This motion would cause the rope to move perpendicular to the direction of the wave's travel, which characterizes a transverse wave.
If there were two transverse waves created from opposite ends, with one wave traveling towards the other, one would anticipate seeing a superposition of the two waves when they meet. This interaction, where two waves overlap and combine, is an example of wave interference. The resultant wave pattern can vary depending on the relative phases and amplitudes of the interacting waves, illustrating concepts such as constructive or destructive interference.
If a 375 mL sample of water was cooled from 37.5 C to 0 C how much heat wad lost in joules
Example of figurative language the toast jumped out of the toaster. What effect of the argument can go with the example of figurative language
The example of figurative language in the phrase "the toast jumped out of the toaster" is a metaphor. Using figurative language in an argument can make it more engaging and persuasive.
Explanation:The example of figurative language in the phrase "the toast jumped out of the toaster" is a metaphor. A metaphor is a figure of speech that compares two different things by saying one thing is another thing, without using the words "like" or "as". In this case, the toast is compared to something that jumps, which creates a vivid image and adds interest to the description.
The effect of using this metaphor in an argument could be to make the argument more engaging and memorable. By using figurative language, the writer or speaker can convey their message in a more creative and impactful way, capturing the attention of the audience and making the argument more persuasive.
A solid object has a mass of 30 grams and a volume of 10cm3 what is the density of the object?
The efficiency of a ramp is 75%. if the amount of work input is 240 j, what is the amount of useful work output?
Answer:
180
Explanation:
If the work input equals 240 then we follow the equation for work output.
Work output = (work input x efficiency)/100%
Work output = (240 x 75%)/100%
Work output = 180/100%
Work output = 180
Which two stimuli did John B. Watson associate in his infamous “Little Albert” experiment? A. a white lab rat and the boy’s mother B. fear and a loud noise C. a white lab rat and a loud noise D. fear and the boy’s mother
Answer:
C) a white lab rat and a loud noise
Explanation:
egde 2020
The Earth’s gravitational force that attracts the sun is __________ the sun’s gravitational force to attract the Earth?
A. less than
B. equal to
C. greater than
D. centrifugal
E. none of the above
TEST HELP PLEASE!! WILL GIVE MEDAL TO BEST ANSWER!!
1 When the air under the envelope is heated, the balloon lifts. Which of the following statements is true.
a. Hot air balloons use radiation to rise
b. Hot air balloons use conduction to rise
c. hot air balloons use convection to rise
d. hot air balloons use air resistance to rise
Is the answer answer C?,
A rocket, weighing 43576 N, has an engine that provides an upward force of 11918 N. It reaches a maximum speed of 713 m/s. For how much time must the engine burn during the launch in order to reach this speed? Call up positive.
An ambulance siren sounds different as it approaches you than when when it moves away from you. what scientific term would you use to explain how this happens
D
A
A
D
B
D
just took on connections !!!!!
In the demolition of an old building, a 1,300 kg wrecking ball hits the building at 1.07 m/s2. Calculate the amount of force at which the wrecking ball strikes the building. The wrecking ball strikes the building with a force of N.
Answer:
1391
Explanation:
What color band markings would be seen on a 2.2 k resistor? A. Black, black, orange B. Orange, red, red C. Red, red, orange D. Red, red, red
According to newton's 2nd law of motion, what is the relationship between mass and acceleration? provide an example to clarify your response.
The relationship between mass and acceleration according to Newton's second law of motion is that acceleration is directly proportional to the net external force and inversely proportional to the mass of the object. So, larger mass leads to smaller acceleration for the same applied force.
Explanation:According to Newton's second law of motion, the acceleration of a system is directly proportional to and in the same direction as the net external force acting on the system, and inversely proportional to its mass. This essentially means that the larger the mass of an object, the smaller its acceleration will be when a net external force is applied, due to the object's increased inertia. For example, if you try to push a car and a bicycle with the same amount of force, the car (which has a greater mass) will accelerate slower than the bicycle (which has less mass).
Learn more about Newton's Second Law of Motion here:https://brainly.com/question/13447525
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Which of the following waves have the lowest energy?
Gamma waves
Radio waves
Visible light
X-rays
Answer:
The answer is radio waves
Hope that helps! :)
A bookcase has a mass of 37 kg. What is the weight of the bookcase?
Answer:
the weight of the bookcase is 363N
The type of radiation that humans sense as heat is _____. ultraviolet visible microwave infrared
What mass of electrons would be required to just neutralize the charge of 5.0 g of protons? (the mass of a proton is 1.67262×10−24g, and the mass of an electron is 9.1×10−28g.)?
Answer:
[tex]m = 2.72 \times 10^{-3} g[/tex]
Explanation:
total number of protons in 5 gram of total mass is given as
[tex]N = \frac{m}{m_p}[/tex]
here we have
[tex]N = \frac{5}{1.67262 \times 10^{-24}}[/tex]
[tex]N = 2.99 \times 10^{24}[/tex]
now to neutralize the charge we require same amount of negatively charge electrons
so we have
[tex]m = N(m_e)[/tex]
[tex]m = (2.99 \times 10^{24})(9.1 \times 10^{-28})[/tex]
[tex]m = 2.72 \times 10^{-3} g[/tex]
Which of the following correctly lists the planets in the Solar System from the smallest to the largest in terms of diameter?
A. Mars, Mercury, Venus, Neptune, Uranus, Saturn, Jupiter, Earth
B. Mercury, Mars, Venus, Earth, Neptune, Uranus, Saturn, Jupiter
C. Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, Mercury
D. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
Answer:
The answer in B
Explanation:
I did the test and doubled check with my teachers.
Wendy makes a graphic organizer to help herself apply Ohm’s law to electric circuits.
Which formulas belong in the regions marked X and Y?
X: I = I1 + I2 + I3
Y: Req = R1 + R2 + R3
X: Req = R1 + R2 + R3
Y: I =
X: I = I1 = I2 = I3
Y: V = V1 + V2 + V3
X: I =
Y: V = V1 = V2 = V3
In a series circuit represented by Ohm's law, the correct formulas to use are I = I1 = I2 = I3 for region X and Req = R1 + R2 + R3 for region Y, indicating that current remains constant through components and resistances are additive.
Explanation:Wendy is working with Ohm's law and electric circuits and needs to know which formulas apply to regions marked X and Y in her graphic organizer. Ohm's law describes the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit and is given by V = IR. When multiple resistors are present in a circuit, their total or equivalent resistance (Req) and the total current depend on whether they are arranged in series or parallel.
In a series circuit, the total current (I) remains the same through all the components, and the voltages across each component add up. Hence, I = I1 = I2 = I3 which would be the correct formula for region X. For region Y, in a series circuit, the equivalent resistance (Req) is simply the sum of all individual resistances, thus Req = R1 + R2 + R3 is the correct formula.
However, in a parallel circuit, the voltage across all components is the same and the currents through each component add up to the total current, which is represented by I = I1 + I2 + I3, but this does not apply to the original question.