As concentration of a solution, increases by a tenth, the pH will become basic. The pH scale measures how acidic or basic the substance is, where 0 is the most acidic due to increase in H+ in a concentration, 14 is the most basic because of low H+ concentration and 7 is considered neutral with equal number of H+ and OH- ions.
How do scientists detect the various electromagnetic waves coming from space?
The electromagnetic spectrum defines all the wavelengths of light. Scientist uses different kinds of telescopes sensitive to different wavelengths of the spectrum. Large infrared telescopes are used to view the core of our galaxy. Moreover, radio telescopes are used to map the structure of our galaxy while microwave telescopes captures the remnant glow of the Big Bang.
Which of the following measurements is used to measure the distance between astronomical bodies?
Speed of light
Speed of sound
Speed of spacecraft
Speed of rotation of Earth
Generally we use speed of light to measure the distance between two astronomical bodies
Because astronomical bodies are very far from each other
and we use light year as the unit of distance for large distances
1 light year is the distance covered by light in one year
so speed of light is correct option here
How long would it take for a ball dropped from the top of a 576-foot building to hit the ground? round your answer to two decimal places?
a student pushes a 40-N block across the floor for a distance 0f 10 m how much work was done to move the block?
What is the gravitational potential energy of a 65.7 kg person standing on the roof of a 135 meter building?
The gravitational potential energy of a 65.7 kg person standing on the roof of a 135 meter building is 86,752.17 Joules, calculated using the formula PEg = mgh.
The gravitational potential energy (PEg) of a person or object is calculated using the formula PEg = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m/s² on Earth), and h is the height above a reference point in meters.
In the case of a 65.7 kg person standing on the roof of a 135 meter building, the gravitational potential energy can be calculated as follows:
PEg = mgh = (65.7 kg) (9.8 m/s²) (135 m) = 86,752.17 Joules
Hence, the person has a gravitational potential energy of 86,752.17 J when standing on the roof of the building.
For Jane to see an image, light must enter her eyes. what specifically is entering her eyes when she sees an image?
A) Matter
B) Energy
C) Color
what is the gravitational potential energy relative to the ground of a 1.0-kg box at the top of a 50-m building ?
The gravitational potential energy relative to the ground of a 1.0-kg box at the top of a 50-m building is 490 Joule.
What is gravitational potential energy?The energy that an item has or acquires when its location changes as a result of being in a gravitational field is known as gravitational potential energy. Gravitational potential energy can be defined as an energy that has a connection to gravitational force or gravity.
Mass of the box = 1.0 kg.
Height of the box relative to the ground = 50 meter.
Acceleration due to gravity = 9.8 m/s²
Hence, the gravitational potential energy is = Mass of the box × Height of the box × Acceleration due to gravity
= 1.0 kg × 50 meter × 9.8 m/s².
= 490 Joule.
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What is the most appropriate SI unit to express the speed of a cyclist in a 10-km race? km/s cm/h km/h mm/s
How is it possible you can feel heat from the sun?
there are three ways by which we can transfer heat from one place to other
1. Conduction
In this method of heat transfer heat can be transferred from one place to other without actual movement of medium molecules. This is possible in solid conducting mediums
2. Convection
Here heat energy is carried away along with the medium molecules where medium molecules can move from one place to other while heat is transferred. It is possible in liquid and gas but not possible in solids
3. Radiation
In this mode of heat transfer we do not require any medium and here heat transferred by electromagnetic waves
So we can feel heat from sun in form of electromagnetic waves and it is the fastest way to transfer the heat also it do not require any medium
Which energy transformation is represented in the diagram?
A nuclear to thermal and radiant
B nuclear to electrical and chemical
C Chemical to nuclear and radiant
D Chemical to electrical and nuclear
Answer:
A nuclear to thermal and radiant
Explanation:
Nuclear fission is the disintegration of the force that holds the nucleus of the atom together, creating two different but lighter nuclei.
In nuclear fission, it seeks to break the force of attraction or nuclear force that joins the protons and neutrons that form the nucleus of an atom. Neutrons without electric charge are used against the nucleus of the atom to produce enough excitation energy to deform the nucleus into two halves.
The nuclei obtained from nuclear fission are different and lighter than the initial nucleus. The excess energy that emerges from nuclear fission is what is known as nuclear energy.
Nuclear fission produces energy in the form of heat and other radiations releasing (ie thermal and radiation in general), in turn, other neutrons. Each generated neutron collides with the other nuclei created, producing a chain reaction.
Nuclear fission can be used for power generation through a nuclear reactor. A nuclear reactor is a facility that generates self-sustained and controlled nuclear reactions, and uses the energy released from the fission of atoms.
For example, one of the first applications of nuclear fissions used uranium atoms to produce electricity.
When a neutral metal sphere is charged by contact with a positively charged glass rod, the sphere
(1) loses electrons
(2) gains electrons
(3) loses protons
(4) gains protons
Instruments that produce sound from a vibrating string (suspended between two nodes) are called:
The instruments that produce sound from a vibrating string suspended between two nodes are called chordophones.
What is a chordophone?A chordophone is a musical instrument that produces sound from the vibration of a stretched string. The string is typically made of metal, nylon, or gut, and it is attached to two fixed points. When the string is plucked, bowed, or struck, it vibrates and produces sound waves.
Some of the most common chordophones include: Violin, Guitar, Harp, Lute. Chordophones are a diverse group of instruments, and they come in a variety of shapes and sizes. They are played in a variety of musical genres, and they are enjoyed by people all over the world.
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Which of the following could you do to increase the strength of an electromagnet? decrease the number of windings
decrease the electric current
change the core from wood to iron
all of the above
change the core from wood to iron
A sled and rider, gliding over horizontal, frictionless ice at 4.3 m/s , have a combined mass of 74 kg . the sled then slides over a rough spot in the ice, slowing down to 2.9 m/s . part a what impulse was delivered to the sled by the friction force from the rough spot?
Which type of heat source is the cleanest?
A.open fireplace
B.wood stove
C.hot water radiant heat
Answer:
option (C)
Explanation:
The source which gives the energy in form of heat is called heat source.
There are several sources which gives us heat. For example, sun, burning candle, burning coal, heater, wooden stove, etc.
Here, the cleanest source of heat energy is hot water.
When Jamie removes a woolen cap, his hair develops an excess of static charge Which of these BEST explains this phenomenon?
Two identical parallel plate capacitors A and B connected to a battery of V volts w/ the switch S closed. The switch is now opened and the free space between the plates of the capacitors is filled w/ a dielectric of dielectric constant K. Find the ratio of the total electrostatic energy stored in both capacitors before and after the introduction of the dielectric.
A disturbance that moves through a solid, liquid, gas, or a vacuum is defined as __________.
energy, as long as matter is being transported
sound, as long as matter is not present within the disturbance
a wave, as long as matter is not being transported
a wave, as long as matter is being transported
Answer:
Wave
Explanation:
It is called wave.
when the disturbance moves through solid, liquid, gas and vacuum is called non mechanical wave.
The non mechanical wave do not require medium for travel. For example, light waves. they can travel through vacuum also.
A plane, diving with constant speed at an angle of 40.9° with the vertical, releases a projectile at an altitude of 654 m. the projectile hits the ground 6.70 s after release. (a) what is the speed of the plane? (b) how far does the projectile travel horizontally during its flight? what were the magnitudes of the (c) horizontal and (d) vertical components of its velocity just before striking the ground? (state your answers to (c) and (d) as positive numbers.)
Jake uses a fire extinguisher to put out a small fire. When he squeezes the handle, the flame rettardant is released from the extinguisher with considerable force. As a result, Jake has to reinforce his grip on the extinguisher to hold it in place as it pushes back into his hands. The projectile in this scenario is the . The recoil in this scenario is the . The force on the flame rettardant is the force on the extinguisher. The mass of the flame rettardant is the mass of the extinguisher. The acceleration of the flame rettardant is the acceleration of the extinguisher.
The projectile in this scenario is the flame r.
The recoil in this scenario is the extinguisher.
The force on the flame r is equal to the force on the extinguisher.
The mass of the flame r is less than the mass of the extinguisher.
The acceleration of the flame r is greater than the acceleration of the extinguisher.
Answer:
The projectile in this scenario is the flame r.
The recoil in this scenario is the extinguisher.
The force on the flame r is equal to the force on the extinguisher.
The mass of the flame r is less than the mass of the extinguisher.
The acceleration of the flame r is greater than the acceleration of the extinguisher.
What causes the curved path of a projectile??
The curved path of a projectile, known as its trajectory, is primarily due to the influence of gravity, along with other factors such as air resistance and the rotation of the Earth.
Gravity: The dominant force acting on a projectile is gravity, which pulls the object downward toward the center of the Earth. As a projectile moves forward, gravity pulls it down, causing it to follow a curved path rather than a straight line. The motion creates a parabolic trajectory when air resistance is negligible.
Initial Velocity and Launch Angle: When a projectile is launched, it has an initial velocity and is given a specific angle with respect to the horizontal. These factors contribute to how high and how far the projectile will travel.
Air Resistance: In real-world scenarios, air resistance also plays a significant role in shaping the projectile's path. This force opposes the motion of the projectile and causes deviations from the ideal parabolic path. The effect of air resistance can be complex and often results in a more flattened trajectory.
An electric field of 3 × 1016 is needed to create a spark in the air. If the charged particles in the field are separated by a distance of 1 mm, how many coulombs of charge are needed for a spark?
Answer:
There are 3.34 C of charge are needed to spark.
Explanation:
Given that,
Electric field, [tex]E=3\times 10^{16}\ N/C[/tex]
If the charged particles in the field are separated by a distance of 1 mm, d = 1 mm
The electric field is given by the formula as follows :
[tex]E=\dfrac{kq}{d^2}[/tex]
q is charge
[tex]q=\dfrac{Ed^2}{k}\\\\q=\dfrac{3\times 10^{16}\times (1\times 10^{-3})^2}{9\times 10^9}\\\\q=3.34\ C[/tex]
So, there are 3.34 C of charge are needed to spark.
Answer:
The correct answer is 3.
Explanation:
alcohol use for can cause feel alcohol syndrome in the unborn fetus? true or false
Answer:
True
Explanation:
A 60 Watt light bulb runs for 120 seconds. How much energy does it use?
What is the period of a wave if the wavelength is 100 m and the speed is 200 m/s?
(a) 200,000 s
(b) 2 s
(c) 0.5 s
(d) 100 s
Which one of the following statements best describes the just world hypothesis?
The statement that best describes the just world hypothesis is people deserve what happens to them, whether good or bad. The correct option is a.
What is a hypothesis?A hypothesis is a testable declaration about the relationship among two or more variables or a suggested explanation for some observed phenomenon in a scientific context.
A hypothesis is an assumption formed based on evidence. This is the first step in any investigation that converts research questions into predictions. It consists of variables, a population, and the relationship between the variables.
A hypothesis is a statement rather than a question. The scientific question in your project is not your hypothesis. The hypothesis is a well-informed, testable prediction of what will occur.
A scientific paper should begin with a clear statement of the hypothesis. This helps the reader understand the issue. People deserve what happens to them, whether good or bad, according to the statement that best describes the just world hypothesis.
Thus, the correct option is a.
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Your question seems incomplete, the missing options are:
a. People deserve what happens to them, whether good or bad.
b. If people act with integrity, they contribute to a just world.
c. The world is just, but some people don't think it is.
d. People who work hard are superior to those who are lazy. User: If you exhibit a high level of psychological hardiness, you're probably the type of person who
Why is it important to make healthy choices about your diet and exercise?
Final answer:
Regular exercise, combined with a healthy diet, offers a myriad of health benefits, from disease prevention to cognitive enhancement.
Explanation:
Regular physical exercise is essential in preventing various diseases such as cardiovascular disease, cancer, diabetes, and obesity. Muscle health and strength significantly improve with consistent exercise.
When combining exercise with a healthy diet, individuals are less likely to be obese and experience benefits such as improved cardiovascular health, lowered blood pressure, enhanced diabetes management, joint flexibility, and muscle strength.
Exercise not only influences physical health but also slows cognitive impairments associated with aging, showcasing the holistic benefits of staying physically active throughout life.
Two devices with capacitances of 25 μf and 5.0 μf are each charged with separate 120 v power supplies. calculate the total energy stored in the two capacitors. your answer submit
Answer:
Total energy stored in both is 0.0018J
Explanation:
Formula to calculate the total energy stored between two capacitors = 1/2CV²
Energy stored the First Capacitor = 1/2 × 25× 10⁻⁶f × (120)²
Energy stored = 0.0015J
Energy stored in the second Capacitor = 1/2 × 5× 10⁻⁶f × (120)²
Energy stored = 0.0003J
Total Energy stored = Energy stored in capacitance 1 + Energy stored in Capacitor 2
= 0.0015J+ 0.0003J
= 0.0018J
what's the method for displacement in physics. I NEED HELP ASAP
A buoy is anchored to the ocean floor. A large wave approaches the buoy. How will the buoy move as the wave goes by?
The buoy will be moved by the force exerted on it by the waves.
Explanation
As the buoy is anchored to the ocean floor, the buoy will be floating in the ocean floor.
When the large wave approaches, it will act as an external unbalanced force on the buoy.
The waves will consist of crest and trough.
The crest region have higher force. So the crest will first interact with the buoy and the external force of crest will make the buoy to float upward along with the motion of crest.
Then the trough region will lessen the force and thus it will again come back in its original position.