Jack has a rock.the rock has a mass of 14g and a volume of 2cm^3.what is the density of the rock?
which is a necessary part input for all heat engines?
A) Steam to act as a working substance
B) An energy source, such as fuel or electrticity
C) A device to generate electrticity
D) Luiqid water to act as a working substance
What kind of movement does the heat within the core and mantle directly generate?
Elements are arranged in the periodic table based on various patterns. For example, the element magnesium (Mg) A. has a higher atomic mass than the element sodium (Na). B. has a lower atomic mass than the element beryllium (Be). C. has a higher atomic mass than the element calcium (Ca). D. all of these
Answer:
A has a higher atomic mass than the element sodium (Na).
Explanation:
Just did the study island :)
Elements are arranged in the periodic table based on various patterns. For example, the element magnesium (Mg) A. has a higher atomic mass than the element sodium (Na). Option A is correct.
What is periodic table ?The periodic table is an organization of all known elements in order of increasing atomic number and repeating chemical characteristics.
They are organized in a tabular format, with a row representing an era and a column representing a group.
Elements are ordered in increasing atomic number order from left to right and top to bottom.
Elements of the same group will have the same valence electron configuration and, as a result, will have comparable chemical characteristics.
Elements are arranged in the periodic table based on various patterns. For example the element magnesium (Mg) A. has a higher atomic mass than the element sodium (Na).
Hence, option A is correct.
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Each line on a speed-lock cutting head tool arm knob moves the cutting tip ______ in or out.
It is to be noted that each line on a Speed-Lock cutting head tool arm knob moves the cutting tip .0025” in or out.
The question pertains to the movement of the cutting tip on a Speed-Lock cutting head tool arm knob. A Speed-Lock cutting head tool arm knob likely refers to a component in a machining or cutting tool system, facilitating adjustments.
The statement "Each line on a Speed-Lock cutting head tool arm knob moves the cutting tip .0025” in or out" suggests that each line corresponds to a movement of 0.0025 inches for the cutting tip.
Therefore, the correct answer is option B, indicating that each line on the knob moves the cutting tip by 0.0025 inches.
Full Question:
Although part of your question is missing, you might be referring to this full question:
Q6. Each line on a Speed-Lock cutting head tool arm knob moves the cutting tip ______ in or out.
A. .001”
B. .0025”
C. .010”
D. .020”
How long does it take to.travel 500 miles in.a car at 75mph?
Which parameter of glass is measured with bromoform and bromobenzene mixtures in a column?
Answer: Density
Explanation:
Density is the parameter which is used for comparision of two doubted to be similar pieces of the glasses in the columns where a specific volume of liquids bromoform and bromobenzene are used. The two glasswares (graduated cylinders) are used in this process along with the liquids. The level at which the glass pieces in the column settles that represent their density. If two pieces of glass are from same source then they will settle at the same level in the column. This method is known as density gradient method.
How does the doppler effect affect the velocity from a sourse that is approaching you?
Which is a characteristic that makes electromagnetic waves and water waves different
If a clock expends 2 W of power from a 1.5 V battery what amount of current is supplying the clock?
The power generated at the clock is dependent on the voltage and current supplied to the clock. The amount of current supplied to the clock is 1.34 A.
What is power?Power can be defined as the amount of energy transferred per unit time interval within a system.
Given that the voltage V is 1.5 V and power P generated at the clock is 2 W.
The power generated at the clock is given by the formula,
[tex]P = VI[/tex]
[tex]2 = 1.5 \times I[/tex]
[tex]I = 1.34 \;\rm A[/tex]
Hence we can conclude that the amount of current supplied to the clock is 1.34 A.
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When an object moves at a very high speed relative to an observer, its measured length in the direction of motion is contracted. t true?
The largest tides occur at _____.
1. new moon
2. full moon
3. first quarter
4. last quarter
5. solar eclipse
6. lunar eclipse
This is a multiple answer question.
The largest tides occur at full moon, solar eclipse, and lunar eclipse. Thus, the correct option is B, E, and F.
What are solar and lunar eclipses?Eclipses are of two types: Solar and Lunar eclipse. A solar eclipse occurs when the moon enters between the sun and the earth, which its shadow on the earth's surface.
A lunar eclipse occurs when the earth is moved between the sun and the moon and the Earth leaves its shadow on the moon. The tides form in seas because of the gravitational force of the moon.
The gravity of the moon makes the tides or waves in the seas or oceans. The full moon has more gravitation force and hence, larger tides are formed. The largest tides are also formed by solar and lunar eclipses.
When the sun is aligned with the moon during the eclipse, the sun is also pulling in the same direction resulting in the largest tides. The gravitational pull of the sun and moon increases the tides in ocean surfaces on Earth.
Thus, the largest tides occur at Full moon, solar and lunar eclipse. The correct options are B, E, and F.
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An exothermic reaction ___ energy.
A) releases
B) absorbs
C) creates
D) decreases
Jake and brenda drove at a speed of 30 miles for one hour then they turned around and drove 45 miles per hour until they were back where they started what is the true or what is true about their average speed and average velocity
Answer:
Average speed is greater than average velocity. Average velocity is zero.
Explanation:
Average speed is calculated by:
[tex]\text{Average speed} =\frac{\text {Total Distance}}{\text{Total time taken}}[/tex]
Distance is the length of the total path traveled.
Average velocity is given by:
[tex]\text{Average velocity} =\frac{\text {Total Displacement}}{\text{Total time taken}}[/tex]
Displacement = final position - initial position.
Since, final position =initial position, Displacement = 0, therefore, average velocity = 0
It can be concluded that average velocity is zero and average speed is greater than average velocity.
Which term does not identify a vector quantity?
Which planet has the strongest magnetosphere?
Help please!!!!!!!!!!!!!!!!!!!!
A 500g sample of Potassium-40 is left to decay radioactively. After 3.9 x 109 years, about how many grams of Potassium-40 are expected to remain? [The half-life of Potassium-40 is 1.3 x 109 years.]
Inner planets that are composed mainly of rock and metal are called
Temperatures of four liquid substances are shown in the chart.
Which statement is best supported by the data in the chart?
A) Substance X will transfer thermal energy to substance Y mainly through radiation if they are mixed.
B) Substance Y will transfer thermal energy to substance Z through conduction if they are mixed.
C) Substance X will transfer thermal energy to substance W through radiation if they are placed near each other.
D) Substance W will transfer thermal energy to substance X through conduction if they are mixed.
For those of you taking the course on Edge, the right answer is D.
Answer: D) Substance W will transfer thermal energy to substance X through conduction if they are mixed.
Explanation: Thermal energy is the energy possessed by an object by virtue of its temperature. It is transferred from a hotter object to a colder object till both the bodies attain the same temperature.
Radiation occurs when thermal energy is transferred by electromagnetic waves. Conduction occurs when thermal energy is transferred when two objects are in direct contact.
Thus Substance W at a temperature of [tex]40^0C[/tex] will transfer thermal energy to substance X at a temperature of [tex]37^0C[/tex] through conduction if they are mixed as they are in direct contact.
Which term refers to the difference between the energy of the transition state and the energy of the reactamts?
The transition state is the state where an electron makes a jump to change its energy level. The term refers to the difference between the energy of the transition state and the energy of the reactants is the activation energy.
What is energy?Energy is the ability to do work.
The transition state is considered to be the highest energy point on the minimum free energy reaction path (MERP). It is the state corresponding to the highest potential energy along the reaction.
Reactions occur between the path of converting reactants to products which is of lowest energy.
Thus, the term refers to the difference between the energy of the transition state and the energy of the reactants is the activation energy.
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The term referring to the difference between the energy of the transition state and the energy of the reactants is activation energy.
The term you're looking for is activation energy, which is the energy required to transform the reactants into the transition state. This can also be considered the 'energy barrier' that must be overcome for a reaction to proceed. The transition state, also known as an 'activated complex', is the highest energy point during the process of bonds breaking and forming. The magnitude of the activation energy is crucial because it determines the kinetics of a reaction; the higher the energy barrier, the slower the reaction rate. Moreover, the existence of a catalyst in a reaction can lower the activation energy, thereby increasing the reaction rate without altering the energies of the reactants or products.
A forklift lifts 5 boxes from the ground to a height of 2 meters (m). The boxes push down with a force of 1000 newtons (N). How much work was done by the forklift to lift the boxes?
Answer:
2000 j
Explanation:
its the right answer
a roller coaster slows as it travels up a hill
a) speed
b) velocity
c) acceleration
As the roller coaster ascends the hill, it experiences a decrease in speed which affects its velocity, leading to what we describe as negative acceleration or deceleration.
Explanation:When a roller coaster is traveling up a hill, it begins to slow down due to the force of gravity opposing its motion. This is a scenario of negative acceleration or deceleration.
Speed refers to how fast an object is moving without concerning the direction. In this case, the speed of the roller coaster decreases as it climbs the hill.
Velocity includes both the speed and direction of an object's motion. Here, the velocity also decreases as the speed decreases and the direction is upwards.
Acceleration refers to the rate of change of velocity. When the roller coaster slows down while moving up, it is undergoing negative acceleration or deceleration.
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Sound from source a has twice the frequency of sound from source
b. compare the wavelengths of sound from the two sources.
If we start with 1.000 g of cobalt-60, 0.675 g will remain after 3.00 yr. this means that the of is _____
The molar enthalpy of fusion for water is 6.008 kj/mol. what quantity of energy is released when 253g of liquid water freezes? (molar mass of water is 18.02 g/mol)
A 100 kg bag of sand has a weight on 100 N. When dropped its acceleration is what?
Answer:
Gravity.Explanation:
If you are holding the bag of sand, the only acceleration in the system is gravity, because is a vertical movement. So, [tex]a = 9.81 \frac{m}{s^{2} }[/tex]
We are assuming that is vertical movement because is say ''dropped'', which is a term used in Free-fall models, where acceleration is constant.
What is the wavelength (angstroms) of a photon that has an energy of 4.38 x 10-18 j?
Answer: The relationship between energy and frequency of a photon is given by E = h*f.
E is the energy, h is planck constant and f is the frequency and f= c/λ.
But i want wavelength, so i write this equation as E= h*c/λ.
now
c=3.8[tex]*10^{8}[/tex]
E =4.38*[tex]10^{-18} [/tex] [tex]\frac{m^{2}*kg }{s^{2} }[/tex]
where i replaced joules for [tex]\frac{m^{2}*kg }{s^{2} }[/tex]
h = 6.62607004 *[tex]10^{-34}[/tex][tex]\frac{m^{2}*kg }{s }[/tex]
then λ = h*c/E = [tex]\frac{6.62607004 *10^{-34}*3.8*10^{8}m/s}{4.38*10^{-18} \frac{m^{2}*kg }{s^{2} }}[/tex] = 5.7*[tex]10^{-8}[/tex] m
But you want the solution in angstroms, so 1 meter is [tex]10^{10}[/tex] angstroms
so λ = 5.7*[tex]10^{2}[/tex] = 570 angstrom
in order to produce a current in a cell, the terminals must what?
a. have a potential difference
b. be exposed to light
c. be in a liquid
d. be at two different temperatures
The graph indicates what about the relationship between wavelength and frequency
Wavelength and frequency of awave are in inverse proportion. Therefore, the graph showing as the frequency increases, wavelength decreases.
What is wavelength?Wavelength of an electromagnetic wave is the distance between its two consecutive troughs or two consecutive crusts. Wavelength of a wave indicates how much distance it can cover.
Frequency of an electromagnetic wave is the number of cycles or waves get in one second. Thus its unit is s-1. Frequency of first last some radiations in the spectrum that are UV, gamma, x-ray etc are higher and they have shorter wavelength.
High frequency waves are more energetic whereas longer wavelength is associated with less energy. The relation between frequency v and wavelength lambda is written as follows:
[tex]v = \frac{c}{\lambda}[/tex]
Where c is the speed of light.
As per this relation frequency is inversely proportional to the wavelength. Hence they are in inverse relation.
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