If energy is absorbed because of a chemical reaction the reaction is Endothermic.
Answer: Option D
Explanation:
There are two types of chemical reaction depending upon whether the energy is absorbed or released to the surroundings. When the energy is absorbed in a reaction from the surroundings it is called as an endothermic reaction and the temperature of the surroundings gets affected.
When the opposite reaction occurs in the surroundings, it is called as an exothermic reaction. Option A and B are irrelevant to the situation here. So if the energy is absorbed because of a chemical reaction then the reaction is said to be endothermic.
Which of the following correctly describes a solenoid?
A) The magnetic field around a solenoid is unipolar.
B) The field around a solenoid is termed a bar magnet.
C) A solenoid is created by winding current carrying wire into a coil.
D) Increasing the current in the wires will reduce the magnetic field outside of the solenoid.
Answer;
C) A solenoid is created by winding current carrying wire into a coil.
Explanation;
-A solenoid is a coil of insulated or enameled wire wound on a rod-shaped form made of solid iron, solid steel, or powdered iron.
-Solenoids have a wide range of applications, for instance they are used as electromagnets, as inductors in electronic circuits, and as miniature wireless receiving antennas.
what can you tell about the hydrogen/hydroxide ion concentration of the unknown liquid
In Step 5, you will calculate H+/OH– ratios for more extreme pH solutions. Find the concentration of H+ ions to OH– ions listed in Table B of your Student Guide for a solution at a pH = 2. Then divide the H+ concentration by the OH– concentration. Record these concentrations and ratio in Table C. What is the concentration of H+ ions at a pH = 2? mol/L What is the concentration of OH– ions at a pH = 2? mol/L What is the ratio of H+ ions to What is the concentration of H+ ions at a pH = 11?
Answer
below
Explanation:
0.01
0.000000000001
10,000,000,000 : 1
Answer:
What is the concentration of H+ ions at a pH = 2?
0.01
mol/L
What is the concentration of OH– ions at a pH =2?
0.000000000001
What is the ratio of H+ ions to OH– ions at a pH =2?
10,000,000,000: 1
Explanation:
Is there more potentioal energy at the top of bottom of a ramp?
A substance with a pH of 9 has
A) no H30+ ions or OH- ions.
B) more H30+ ions than OH- ions.
C) more OH- ions than H30+ ions.
D) the same number of H30+ ions as it does OH- ions.
I would love to stretch a wire from our house to the Shop so I can 'call' my husband in for meals. The wire could be tightened to have a tension of 240N and a m/L 'weight' of 0.05kg/L. How long would it take for my pulse wave to travel to the Shop (24m) to ring a bell to indicate dinner time.
What are the relative positions of the sun moon and earth during a full moon?
The first artificial satellite to be launched into space was called _____________.
True or false: Being highly creative is a behavior leading to self-actualization.
True.
Self-actualization brings about self-satisfactions and a sense of
self-worth.
When someone is highly creative and creates something successfully, he or she
feels motivated and feels that he or she has finally achieved his or her goal.
Nothing better than this can lead to self-actualization.
A ray of light traveling in air strikes the surface of a liquid. if the angle of incidence is 31.7◦ and the angle of refraction is 21.3◦ , find the critical angle for light traveling from the liquid back into the air. answer in units of ◦ .
What are the coefficients that would balance the following chemical equation? ___KClO3 → ___KCl + ___O2
The four terrestrial planets are so called because they ?
Which of these is the best description of the Frye Standard?
A) The procedure that is followed to prepare an examiner for trial.
B) Applying the principle that no two people have exactly the same fingerprints.
C) Determining if an expert witness is in fact an expert and allowing their testimony in court.
D) Deciding if the procedure, principles or techniques in question in a forensic case are generally accepted by the relevant scientific community.
Which technique is used to compare ink on a suspect document?
A) thin-layer chromatography
B) infrared spectrophotometry
C) blotting with alcohol method
D) ultraviolet spectrophotometry
At what point in a trial process can a plea bargain no longer be entered?
A) when the jury considers the verdict
B) before opening statements
C) after the prosecution rests
D) when the defense rests
Answer:
1. Option D) Deciding if the procedure, principles or techniques in question in a forensic case are generally accepted by the relevant scientific community.
2. Option A) thin-layer chromatography
3. Option A) when the jury considers the verdict
Explanation:
1. The Frye Standard is a procedure to determine if the piece of evidence is admissible in a court of law. This is a rigorous test to test how well the evidence can be used against a criminal or prove a case in the court of law. This came after a ruling that an experts advice only was insufficient to prove a case.
2. Thin layer chromatography is used to separate the ink components. This is because the ink is made of different components that have different volatlitities and solublies in the alcohol solution. The inks can be compared by looking at the partitioning coefficient and comparing the two distances traveled by the components.
3. The guilty cannot plead a case when the verdict has been given. At that moment, the case is closed.
The Frye Standard is used in court to determine if the procedure, principles, or techniques in a forensic case are generally accepted by the scientific community. This standard ensures the admissibility of expert testimony.
The best description of the Frye Standard is determining if the procedure, principles or techniques in question in a forensic case are generally accepted by the relevant scientific community. This standard is used to determine the admissibility of expert testimony in court. The Frye Standard requires that the scientific community generally accepts the technique before allowing it as evidence.
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What kind of circuit is the one shown below?
Answer:
The given circuit diagram shows parallel circuit.
Explanation:
In this circuit diagram two bulbs are connected in parallel combination because current flows from the battery gets bifurcated at the junction. Thus, two bulbs are connected in parallel combination.
This parallel combinations of bulbs then connected to the battery given in the diagram. So, the combinations of bulbs are connected in parallel combinations with the battery.
Hence, both bulbs and battery are connected in parallel combinations with each other.
The circuit diagram shown in figure is parallel.
Answer:
The given circuit is in
Series circuit is the one in which there is more than one resistor.
Combination circuit is the one in which gates are used to form the circuit.
Open circuit is the one in which there is no battery.
Parallel circuit is one in which current is divided in different paths.
Here, we can see that we have a battery in the circuit that means it is closed circuit.
And Current is divided that means it is parallel combination.
Therefore, Option D is correct that is parallel.
Which of the following statements about diodes and triodes is correct
Answer:
Diodes, which are often utilized as rectifiers, have two electrodes.- is correct
Explanation:
I took rhe test so just just trust me
The speed of a wave is 65 m/sec ifthe wavelength of the wave is 0.8 meters what is the frequency of yhe wave
What is the power generated by a 45 kg person who walks up a flight of 12 stairs, each 30 cm high, in 12 s?
A.13.5 W
B.132.3 W
C.1,350 W
D.13,230 W
that which travels in waves that are not the same length is called
If one light bulb burns out in a string of lights, and the rest stay lit, it is reasonable to assume that the lights are wired in
Answer:
Series
Explanation:
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The energy an object possesses due to its form and position is know as
Many dogs have ticks and fleas in their fur. Ticks and fleas feed upon the blood of dogs to get nutrients is that competition, parasitism, mutualism or commensalism
parasitism.
Understanding the Relationship Between Dogs, Ticks, and Fleas
The interaction of ticks and fleas feeding on the blood of dogs is an example of parasitism. In this relationship, the ticks and fleas are considered parasites, benefiting by consuming nutrients from the host, which in this case are the dogs. The host, the dogs, are harmed by this interaction because the parasites can cause discomfort and diseases, such as Lyme disease, which is transmitted by deer ticks. Unlike commensalism, where one organism benefits and the other is unaffected, parasitism negatively impacts the host. Moreover, this is different from mutualism, where both species benefit, and competition, where different species compete for the same resource.
What is planck's constant? choose 2 answers. a when the energy e of a photon is multiplied by its frequency f b 6.623 x 10-34 j.s c when the energy e of a photon is divided by its frequency f d 6.022 x 1023?
How much energy is needed to increase the temperature of 755g of iron from 283k to 403k ?
To find the energy needed to increase the temperature of 755 g of iron from 283 K to 403 K, we use the specific heat capacity of iron (0.449 J/g °C) and the formula q = mcΔT. After converting the temperatures to Celsius, the calculation shows that 40,714 joules of energy is required.
Explanation:The question asks how much energy is required to increase the temperature of a specific mass of iron. The calculation involves using the formula for heat energy, which is q = mcΔT. The specific heat (c) of iron, the mass (m) of the iron object, and the change in temperature (ΔT) are required to find the total amount of energy needed.
To calculate the energy needed to increase the temperature of 755 g of iron from 283 K to 403 K, we use the specific heat capacity of iron, which is given as 0.449 J/g °C in a comparable example. First, we convert the temperatures from Kelvin to Celsius by subtracting 273 from both temperatures. This gives us a starting temperature of 10 °C and an ending temperature of 130 °C. The change in temperature is then 130 °C - 10 °C = 120 °C.
Using the formula q = mcΔT, where
m = 755 g (mass of iron),
c = 0.449 J/g °C (specific heat capacity of iron),
ΔT = 120 °C (change in temperature),
we can calculate the energy required as:
q = (755 g) x (0.449 J/g °C) x (120 °C) = 40,714 J
This means that 40,714 joules of energy is needed to increase the temperature of 755 g of iron from 283 K to 403 K.
Practicing good human relations skills and having a positive attitude will
If you practice good human relation skills then you will be more happy, be open, talk more, you will think more positive and a lot more. (these are just some examples)
Hope this will help someone! ;)
You must raise the weight to a height of 10 meters. You cannot do it! Thinking back to what you have learned in science class, you set up the pulley you see here. How does using this pulley reduce the force needed to lift the weight 10 meters?
Answer:
C.The amount of force stays the same; the direction changes. You pull down to move something up.
Explanation:
i got it right so trust me. if you dont ur loss
Saturn's moon Mimas has an orbital period of 82,800 s at a distance of 1.87x10^8m from Saturn. Using m central m= (4n^2d^3/GT^2) 1 determine Saturn's mass.
Determine Saturn's mass by rearranging Newton's version of Kepler's Third Law.
Answer:
[tex]5.65\times 10^{26} kg[/tex]
Explanation:
From Kepler's third law: Mass of the planet is given by:
[tex] M = \frac{4\pi ^2d^3}{GT^2}[/tex]
where, T is the time period of satellite revolving about the planet at a distance d. G is the gravitational constant = 6.67 × 10⁻¹¹ Nm²/kg²
Given, d = 1.87 × 10⁸ m
T = 82800 s
⇒[tex] M = \frac{4\pi ^2 (1.87\times 10^8)^3}{(6.67\times 10^{-11})(82800)^2}=5.65\times 10^{26} kg[/tex]
A cube shaped pool is half full of water. if the water is 3 feet deep, what is the volume when the water is all the way to the top?
The volume of the cube-shaped pool when filled to the top is 27 cubic feet, as the cube has a side length of 3 feet.
To determine the volume of a cube-shaped pool when it is filled to the top, given that the water is currently 3 feet deep and at half capacity, we can apply the formula for the volume of a cube: Volume = length times width times height. Since the pool is half full, and given that the height of the water is 3 feet, it means that the length of a side of the cube is also 3 feet, as it is a cube shaped pool.
Therefore, the volume of the pool when full would be:
Volume = 3 feet times 3 feet times 3 feet = 27 cubic feet.
This calculated volume represents the pool's total capacity, assuming it's filled all the way to the top.
Which term is defined as the ratio of the speed of light in a vacuum to the speed of light in the material it is passing through?
A. index of refraction
B.index of reflection
C.angle of reflection
D.angle of incidence
An electron is projected vertically upward with a speed of 1.70 ✕ 106 m/s into a uniform magnetic field of 0.320 t that is directed horizontally away from the observer. describe the electron's path in this field when viewed from above.
The path of the electron is 30.2μm
Data;
speed = 1.70x10^6 m/smagnetic field = 0.320TCharge of an electron = 1.60x10^-19 Cmass of an electron = 9.1x10^-31 kgThe radius or path of the electronThe path of the electron is circular and the radius can be calculated with the help of centripetal force.
[tex]qvB = \frac{mv^2}{r} \\qB = \frac{mv}{r}\\ r = \frac{mv}{qB} \\[/tex]
Let's substitute the value and solve.
[tex]r = \frac{mv}{qB}\\r = \frac{9.10*10^-^3^ * 1.70* 10^6}{(1.60*10^-^1^9 * 0.320}\\r = 3.02*10^-5\\r = 30.2 \mu m[/tex]
The path of the electron is 30.2μm
Learn more on centripetal force and magnetic force here;
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Final answer:
The path of an electron projected upward into a horizontal magnetic field, when viewed from above, forms a circular motion due to the magnetic force acting as a centripetal force. The electron will circulate clockwise because of its negative charge.
Explanation:
An electron is projected vertically upward with a speed of 1.70 × 106 m/s into a uniform magnetic field of 0.320 T that is directed horizontally away from the observer. When an electron moves through a magnetic field perpendicular to the direction of the field lines, it experiences a magnetic force perpendicular to both the field and its velocity. This force acts as a centripetal force and causes the electron to move in a circular path.
Since the magnetic field is horizontal and the electron is projected upward, the magnetic force will cause the electron to circulate in a plane perpendicular to the magnetic field. When viewed from above, the path of the electron will be a circle.
It's important to note that the direction of the force and thus the direction of the circular motion depends on the fact that the electron has a negative charge. According to the right-hand rule, as the electron is projected upward, the force will be directed to the observer's left, causing the electron to circulate clockwise when viewed from above.
a 4.0 kg object is acted upon by a 20 n force to the right and a 25 n force to the left. what is the magnitude of the objects accerlation