cubic expansion is 3 times the linear expansion. expressed mathematically as
[tex] \gamma = 3 \alpha [/tex]
since Ethanol has a heat capacity of 0.614 cal/g °C. If 50 g of ethanol has a temperature of 30ºC and a piece of hot Copper is added to the ethanol causing the temperature to increase to 70ºC. What is the amount of heat absorbed by the ethanol?
This question involves the concepts of heat capacity, temperature, and heat.
The heat absorbed by ethanol is "1228 cal".
HEAT CAPACITYThe heat capacity of a substance is defined as the amount of heat absorbed by a unit amount of that substance for a degree rise in temperature. Mathematically,
[tex]Q = mc\Delta T[/tex]
where,
c = heat capacity = 0.614 cal/g.°Cm = mass of ethanol = 50 gΔT = change in temperature = 70°C - 30°C = 40°CQ = amount of heat absorbed = ?Therefore,
Q = (50 g)(0.614 cal/g°C)(40° C)
Q = 1228 cal
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PLEASE HELP!! WILL MARK BRAINLEST!!! What are 3 types of waves?
Answer:
transverse waves, longitudinal waves, and surface waves.
which religious group did not expand their membership by great numbers during the Second Great Awakening
Answer:
The Catholics.
Explanation:
see answer.
What is the gravitational field strength of a 5 kg object that weighs 25 N?
Answer:
gravitation field strength: 5 N/kg
Explanation:
Weight(N) = mass(kg) * gravitational field strength(N/kg)
Here given the mass: 5 kg and weight: 25 Nmake sure the units are proper and make change only if different units visible. Like mass given in grams and covert it into kg. *must* and sometimes weight given in kilo-newton covert it into Newtons. *must*
using the formula:
5 * gravitational field strength = 25
gravitational field strength = 25/5
gravitational field strength = 5 N/kg
Which of the following is TRUE about visible light?
A.
Visible light can never harm you.
B.
Visible light can’t be seen.
C.
Visible light is not real.
D.
Visible light is radioactive and causes skin cancer.
Answer:
i would guess d because it seems the most correct
Explanation:
a. thought it is small, visible can harm you
b. visible light is the only light humans can see with the bare eye
c. visible light is real and can be seen
d. visible light can be radioactive and can cause skin cancer (it is not definite)
1) A man mass is 150 kg
a) calculate the gravitational force with the formula 10ms[tex] {}^{ - 2} [/tex]
10 ms^-2 is acceleration due to gravitational force
mass = 150kg
force ( weight of the man ) = mass × acceleration due to gravitational force (g)
weight = 150kg × 10ms^-2 = 1500 kg/ms² ( N )
[tex]10 ms {}^{ - 2}[/tex]is acceleration due to gravitational force
mass = 150kg
force (weight ) = mass × gravitational force
weight = 150kg × [tex]10ms {}^{ - 2}[/tex] = 1500 kg/ms²
(HELP PLEASE!!!)
A student is investigating the distribution of charge in a conductor. He attaches two unopened soda cans on their sides to two foam cups with tape. He sets the soda cans with the cups onto a tabletop so that they are touching one another. Then he moves a negatively charged balloon close to the left soda can The set up for the investigation is shown above.
How do the electrons move in the soda cans?
A. They move to the bottom in both cans.
B. They move from the left can to the right can
C. They move to the top of both cans.
D. They move from the right can to the left can.
Answer:
Electrons repel one another - they will move "away" from the left side of the leftmost can- (the right can must become more negatively charged than the left can) -
B appears to be the best answer
The electrons move from the left soda can to the right soda can. The answer is (B).
When the negatively charged balloon is moved close to the left soda can, it will repel the negatively charged electrons in the soda can. This will cause the electrons to move away from the balloon and distribute themselves within the soda can.
Since the soda cans are in contact with each other, the excess electrons from the left soda can will be repelled by the negative charge on the balloon and will flow to the adjacent right soda can. The electrons will continue to move until there is no potential difference between the two cans, which means that they will stop flowing when both cans have the same amount of negative charge.
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What is the equivalent resistance of the following combination circuit? A 5.00 Ω resistance placed in series with a parallel combination of 9.00 Ω and 6.00 Ω ?
The equivalent resistance of the circuit is 8.6 Ω.
What is resistance?Resistance can be defined as the opposition to current flow in an electric circuit. The S.I unit of resistance is ohms.
To calculate the equivalent resistance, we use the formula below.
Formula:
R' = R₁+(R₂//R₃)................ Equation 1Where:
R' = Equivalent resistance of the circuit.From the diagram,
Given:
R₁ = 5 .00 ΩR₂ = 9.00 ΩR₃ = 6.00 ΩSubstitute these values into equation 1
R' = 5+(9//6)R' = 5+[(9×6)/(9+6)]R' = 5+[54/15]R' = 5+3.6R' = 8.6 ΩHence, The equivalent resistance of the circuit is 8.6 Ω
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Odina walked down the hall at school from the cafeteria to the band room, a distance of 100.0m. A class of physics students
recorded and graphed her position every 2.0s, noting that she moved 2.6m every 2.0s. Odina was 25m from the band room
at 58s.
Please select the best answer from the choices provided
Т
F
Find distance she traveled:
100m -25m = 75m
58 seconds / 2 second intervals = 29
29 x 2.6m = 75.4 meters total.
if the distance wasn’t rounded the statement was False.
Answer: False
1. What does the vertical axis represent on a position-time graph?
A. Speed of the object
B. Position of the object
C. Velocity of the object
D. Total time travelled by the object
2. What do you call a graph that is plotted in terms of the distance travelled by the
object and the time it took to cover that distance?
A. Speed-time graph
B. Position-time graph
C. Distance-time graph
D. Displacement-time graph
3. Which is TRUE about displacement?
A. How fast an object is moving
B. Change in position in a given time
C. Length of the entire path that an object travelled
D. Shortest distance between the object’s two positions
4. What does a horizontal line in the distance-time graph indicate?
A. No movement
B. Constant speed
C. Object is accelerating
D. Object is decelerating
5. When looking at a displacement-time graph, what variable should be plotted on the
y-axis and x-axis?
A. Y-axis: Time; X-axis: Distance
B. X-axis: Time; Y-axis: Distance
C. X-axis: Time; Y-axis: Displacement
D. Y-axis: Time; X-axis: Displacement
6. Which of the following illustrates acceleration?
A. Constant velocity
B. Changing direction
C. The direction does not change
D. The speed and direction remains the same
7. The following are correctly matched, EXCEPT
A. Speed: Scalar
B. Velocity: Vector
C. Distance: Scalar
D. Displacement: Scalar
What I Know
3 CO_Q3_Science 7_ Module 2
8. What does a line on a graph that is curving upwards mean in a distance-time graph?
A. The object is not moving.
B. The object has a constant speed.
C. The speed of the object is increasing.
D. The speed of the object is decreasing.
9. The following units can be used to mathematically express speed, EXCEPT
A. m
B. m/s
C. km/hr
D. miles/hr
10. Ethan is playing with his toy car. While watching him, you observed that the toy
car is accelerating. Which of the following graphs show that the toy car is
accelerating?
A B C D
11. Examine the given graph. What conclusion can you make from this graph?
A. The object is stationary.
B. The object is decelerating.
C. The object’s acceleration is increasing.
D. The object is moving at a constant speed.
For items 12-13, refer to the given figure below.
12. What does the part B of the displacement-time graph tell us about the object?
A. The object has a velocity of 2 m/s.
B. The object is not moving for 2 seconds.
C. The object travels 2 meters in 2 seconds.
D.The object travels 2 meters in 2 seconds backs to its starting position.
4 CO_Q3_Science 7_ Module 2
13. What conclusion can you make about the motion of the object after it travels from
point A to point C?
A. I and II only
B. II and III only
C. I and IV only
D. II, III, and IV only
14. Examine the graph below. Is it correct to say that the straight horizontal line on the
speed-time graph means that the object is not moving?
A. Yes, a horizontal line means that the object is at rest or stationary.
B. Yes, a straight line always means that an object is not moving at all.
C. No, a horizontal line indicates that the object has uniform acceleration.
D. No, a horizontal line indicates that the speed is not changing over time.
15. During their science class, Jessa was assigned to discuss about distance-time
graphs. In one of her graphs, Jessa shows a graph with a diagonal line that slopes
upward to the right. She explained that the graph means that an object is moving
at a constant speed. Do you think her explanation is correct?
A. No, the distance-time graph should show a horizontal straight line going to
the right.
B. No, a diagonal line that slopes upward to the right in a distance-time graph
means that the speed is increasing.
C. Yes, the motion of objects plotted in a distance-time graph has similar
interpretation if plotted in a speed-time graph.
D. Yes, a diagonal line that slopes upward to the right means that distance is
increasing constantly with time, thus an object is moving in a steady speed.
Answer:
1. Option B
2. Option C
3. Option D
4. Option C
5. Option C
Explanation:
Given the following questions:
Question one:
Your answer is option B, a position time graph is one of the most common graphs to use to describe the motion of objects. The vertical line of the position time graph is the line that would be the y axis in some math cases. This line represents the "position of the object" or option B.
Question Two:
Your answer is option C or a "distance-time graph." The vertical axis shows the distance travels, while the horizontal line shows the time the object spends in the air. Distance-time graphs are used to show the distance an object traveled, in a certain amount of time.
Question three:
Your answer is option D or "shortest distance between two positions." Displacements definition is purely moving something from its initial position. Displacement is also seen as length and distance, which is why the shortest distance between two positions would be considered as true when it comes to displacement.
Question four:
Horizontal line would be the x-axis on a normal coordinate plane, since this is a distance-time graph and the horizonal line represents time. The answer will be option C or "object is accelerating." Since a distance-time graph shows how far an object goes in a certain amount of time, the horizontal line shows how fast the object is moving while traveling that distance within that certain amount of time.
Question five:
Your answer is option C or "X-axis: Time; Y-axis: Displacement." Since we are talking about a displacement-time graph, Y-axis is the dependent variable, it is what's being measured, so that would be displacement. While x-axis is the independent variable, which is what is being tested, so the x-axis will be time.
Hope this helps.
tome pushed the ends of a large spring together. he had to hold on tight so the spring did not expand in his hands. what type of energy of the spring was increased?
if the bookstore sold 8 books for $66 at that rate how much was one book
In the combo circuit diagrammed, R1 = 19.2 Ω, R2 = 20.7 Ω, and R3 = 25.8 Ω. Find the equivalent resistance of the circuit.
Answer:
Equivalent resistance: 13.589 Ω
Explanation:
R series = R1 + R2 + R3 ...
[tex]\frac{1}{R_{eq} } = \frac{1}{R1} +\frac{1}{R2} +\frac{1}{R3} ...[/tex]
Find the equivalent resistance of the right branch of the circuit:
[tex]R_{eq} = R_{2} +R_{3} \\R_{eq} = 20.7 + 25.8 = 46.5 ohms[/tex]
[tex]\frac{1}{R_{eq} } = \frac{1}{19.2} +\frac{1}{46.5}\\\\\frac{1}{R_{eq} } = 0.0735887097\\\\R_{eq} = 13.5890411[/tex]
Brainliest if correct
Answer:
A
Explanation:
hope it helps you make brainliest
Light waves can interact with matter by being transmitted, absorbed, or ____؟
- help me pleas
Answer:
reflectedExplanation:
Light waves can interact with matter by being transmitted, absorbed, or reflected .
Answer:
Reflection
Explanation:
The answer must be 20
In the ballistic pendulum experiment, a bullet of mass 0.06 kg is fired
horizontally into a wooden block of mass 0.2 kg. The wooden block is
suspended from the ceiling by a long string. The collision is perfectly
inelastic and after impact the bullet and the block swing together until
the block is 0.12 m above its initial position. Find the velocity of the
bullet and the block just after impact. Round your answer to the
nearest tenth.
The velocity of the bullet and the block just after impact is mathematically given as
u=6.647m/s
v=1.534m/s
Velocity of the bullet and the blockQuestion Parameters:
In the ballistic pendulum experiment, a bullet of mass 0.06 kg is fired
horizontally into a wooden block of mass 0.2 kg.
the block is 0.12 m above its initial position.
Generally the equation for the conservation of energy is mathematically given as
0.5(m+n)v^2=(m+n)gh
Therefore
v^2=2gh
[tex]v=\sqrt{2*9.8*0.12}[/tex]
v=1.534m/s
Hence
mu+m*0=(m+n)v
0.060*u=(0.060+0.2)*1.534
u=6.647m/s
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What is the formula for the intensity of a spherical wave?
Answer:
When there is a point source used without directing the light or sound in a direction, the area of a sphere = 4πr 2 is used instead of the area of circle for calculating intensity. The minimum intensity of sound that a human can hear is 10 -12 Wm -2 and the maximum is 1 Wm -2.
Explanation:
Can someone help me with this question AASP
You arrive at a crime scene in a high traffic area shortly after first responders have removed the victim. There are a number of bloody footprints at the scene. After ensuring that the scene is secured from further contamination, what is the most important step to take?
Group of answer choices
obtain the names of all medical personnel who had been at the site
obtain statements from witness
take photographs of all visible footprints
Search for more evidence
Answer:
It seems like c or d I'll say c
Answer:
I believe the answer to be D, search for more evidence. You have to gather evidence while it's still fresh
what are the steps to measure the density of a solid?
Answer:
The five steps for determining density can be found in simple form as follows, measure the mass of the container, measure the volume of the liquid(s), measure the combined mass of the liquid and the container, and then determine the mass of the liquid alone and divide the mass by the volume of it.
What are the principles that no
one could make you abandon no matter what?
Who do you think you would most likely abandon
your principles for and under what circumstances.
Use examples.
Answer:
There are seven principles that form the content grounds of our teaching framework:
Non-maleficence. ...
Beneficence. ...
Health maximisation. ...
Efficiency. ...
Respect for autonomy. ...
Justice. ...
Proportionality.
6. Estimate the line width from thermal Doppler broadening for the CaII K line at 393.3 nm for a star with a temperature of 3,000 K and a star with a temperature of 12,000 K. How does temperature affect line broadening
The line width is calculated as 121.6nm
Data;
Wave length = 393.3nmT1 = 3000kT2 = 12,000KRydberg's FormulaThis is used to calculate the wavelength of an electron when it moves from one state to another.
For Lyman series, n = 1
The energy difference in the two state transitioning are
[tex]n_2[/tex] = ∞
The formula is given thus;
[tex]\frac{1}{\lambda}= R(1(n_1)^2 - \frac{1}{(n_1)^2}.Z^2\\[/tex]
R = Rydberg's constant
Z = atomic number
Since the excited electron dropped from the 1st state to the ground state, the finest line of Lyman series would be
[tex]\frac{1}{\lambda} = R(1(1)^2 - \frac{1}{2^2}).1^2\\z=1\\\lambda = \frac{4}{3} * 912A^o\\\lambda = 121.6nm[/tex]
The line width is calculated as 121.6nm
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Answer questions based on the lab activity.
Assignment
Throughout the reflection, make sure you have a copy of the Student Guide and your data tables. Use the drop-down
menus to complete the statements.
was
This experiment was divided into two parts. For the first part of the experiment, the
intentionally manipulated. This was the independent variable. The dependent variable measured was the
was intentionally manipulated. This was the
by the second part of the experiment, the
independent variable. The dependent variable measured was the
Answer: 1. height of cylinder 2. temperature of cylinder 3.mass of cylinder 4.temp. of cylinder
Explanation:
im doing it rn ! hope this helps :)
The dependent variable gets impacted by changes to the independent variable. Therefore, in the below given ways blanks can be filled.
What are dependent and independent variable?The variable that the experimenter controls is the independent variable. The variable that adapts to the independent variables is known as the dependent variable. The two factors could be connected through cause and effect. The dependent variable gets impacted by changes to the independent variable.
The experiment was divided into two parts. For the first part of the experiment, the height of cylinder was intentionally manipulated. This was independent variable. the dependent variable measured was the temperature of cylinder.
For the second part of experiment, the mass of cylinder was intentionally manipulated. This was the independent variable. The dependent variable measured was the temperature of cylinder.
Therefore, in the above given ways blanks can be filled.
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Brainliest if correct
Answer:
B 1,3, and 4
Explanation:
If a car stops suddenly, seat belts help stop the motion of the people in the car. Seat belts in cars are usually 47 mm wide.
A team of engineers is designing a car seat to hold a small child. They decide that the straps should be only 38 mm wide. Why do the straps in the car seat not need to be 47 mm wide?
A. A smaller person needs to accelerate less than a larger person.
B. Less force is needed to stop a person that has less mass.
C. A smaller person needs to accelerate more than a larger person.
D. More force is needed to stop a person that has less mass.
plase help
Answer:
B. Less force is needed to stop a person that has less mass.
Explanation:
What is the resistance of R1
Answer:
R1 is the first resistance level. It usually falls above the pivot point and below R2 but there are circumstances (see below) when the pivot point can be above R1. R1 is calculated as part of the Pivot Points calculations that traders use to determine where the market might reverse direction.
Explanation:
Why should we wait a little after changing the volume of the trapped gas and then take the readings??
We wait a little after changing the volume of the trapped gas, to make sure that is the gas is back to room temperature.
Boyle's law
This law states that the volume of a fixed mass of a gas is inversely proportional to its pressure provided that temperature remains constant.
P₁V₁ = P₂V₂
Why we wait a littleWe wait a little after changing the volume of the trapped gas, to make sure that is the gas is back to room temperature because a change in temperature can alter the accuracy of the experiment.
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How much force is required to accelerate a 800kg car by 15 m/s2
Answer:
force=12000
Explanation:
F=m*a aka force equals mass times acceleration so 800*15=12000
Answer:
12000 N
Explanation:
The equation for Force is:
[tex]Force=mass*acceleration[/tex]
We can plug in the given values into the equation:
[tex]Force=800kg*15m/s^2\\Force=12000N[/tex]
Boxes A and B are in contact on a horizontal, frictionless surface. Box A has mass 20.0 kg and box B has mass 5.0 kg. A horizontal force of 100 N is exerted on box B. What is the magnitude of the force that box B exerts on box A
Answer:
80 N
Explanation:
For A + B: the net force is 100 N = (mA + mB)*a
a = 100/(20 + 5) = 100/25 = 4 m/s²
For A, the net force = mA * a = 20 * 4 = 80 N
You want to cross a river that is 30 m wide and flows to the East at 3.0 m/s . You can swim at a speed of 5.0 m/s (relative to the water). If you start from the South side of the river and want to go straight across, at what angle should you point yourself
Answer:
Approximately [tex]\text{N$37^{\circ}$W}[/tex] (approximately [tex]37^{\circ}[/tex] west of north.)
Explanation:
The velocity of the swimmer relative to the water is given to be [tex]v(\text{swimmer})= 5.0\; {\rm m\cdot s^{-1}}[/tex]. Decompose this velocity into two components:
parallel to the flow of the river: [tex]v_{\parallel}(\text{swimmer})[/tex];perpendicular to the flow of the river: [tex]v_{\perp}(\text{swimmer})[/tex].Decompose the velocity of the current [tex]v(\text{current}) = 3.0\; {\rm m\cdot s^{-1}}[/tex] along the same set of directions.
parallel to the flow of the river: [tex]v_{\parallel}(\text{current}) = 3.0\; {\rm m\cdot s^{-1}}[/tex] to the east;perpendicular to the flow of the river: [tex]v_{\perp}(\text{current}) = 0\; {\rm m\cdot s^{-1}}[/tex] (Note that the current in the river flows along the river, not toward the banks of the river.)The velocity of the swimmer relative to the bank would be the vector sum [tex](v(\text{swimmer}) + v(\text{current}))[/tex]. Decompose this vector sum in the same directions:
parallel to the flow of the river: [tex]v_{\parallel}(\text{swimmer}) + v_{\parallel}(\text{current})[/tex];perpendicular to the flow of the river: [tex]v_{\perp}(\text{swimmer}) + 0\; {\rm m\cdot s^{-1}} = v_{\perp}(\text{swimmer})[/tex].Swimming straight across requires that the swimmer travel towards the banks but not along the banks. In other words, the velocity of the swimmer relative to the bank should be [tex]0[/tex] in the direction of the river: [tex]v_{\parallel}(\text{swimmer}) + v_{\parallel}(\text{current}) = 0[/tex].
Rearrange to obtain:
[tex]v_{\parallel}(\text{swimmer}) = -v_{\parallel}(\text{current})[/tex].
Thus, [tex]v_{\parallel}(\text{swimmer})[/tex] should be the exact opposite of [tex]v_{\parallel}(\text{current})[/tex].
Since [tex]v_{\parallel}(\text{current}) = 3.0\; {\rm m\cdot s^{-1}}[/tex] to the east, [tex]v_{\parallel}(\text{swimmer})\![/tex] should be [tex]3.0\; {\rm m\cdot s^{-1}\![/tex] to the west.
Refer to the diagram attached: [tex]v(\text{swimmer})[/tex] and its two components [tex]v_{\parallel}(\text{swimmer})[/tex] and [tex]v_{\perp}(\text{swimmer})[/tex] are the three sides of a right triangle, with[tex]v(\text{swimmer})= 5.0\; {\rm m\cdot s^{-1}}[/tex] as the hypotenuse.
Since the swimmer is travelling to the north, [tex]v_{\perp}(\text{swimmer})[/tex] would point northward.
The side [tex]v_{\parallel}(\text{swimmer})[/tex] would be opposite to the angle between the hypotenuse [tex]v(\text{swimmer})= 5.0\; {\rm m\cdot s^{-1}}[/tex] and north ([tex]v_{\perp}(\text{swimmer})[/tex],) Thus, the value of that angle would be:
[tex]\begin{aligned}& \arcsin\left(\frac{\text{opposite}}{\text{hypotenuse}}\right) \\ \\ =\; & \arcsin\left(\frac{3\; {\rm m\cdot s^{-1}}}{5\; {\rm m\cdot s^{-1}}}\right) \\ \approx \; & 37^{\circ}\end{aligned}[/tex].
Since [tex]v_{\parallel}(\text{swimmer})[/tex] points to the west, the direction of [tex]v(\text{swimmer})[/tex] would be approximately [tex]37^{\circ}[/tex] west of north, [tex]\text{N$37^{\circ}$W}[/tex].
what is the name of the scientist that discovered gravity?
[tex] \huge\green{\overline{\underline{\rm{\purple{꧁⫷ᴀɴsᴡᴇʀ⫸꧂ }}}}} [/tex]
[tex] \large\green{\overline{\underline{\rm{\red{•••••••••••••••••••••••••}}}}} [/tex]
what is the name of the scientist that discovered gravity?
Isaac Newton
[tex] \large\green{\overline{\underline{\rm{\blue{•••••••••••••••••••••••••}}}}} [/tex]
#CarryOnLearning
#LibreAngMatuto
The scientist named Isaac Newton discovered the gravity. But before that Aristotle was discovered the gravity first but the calculations were poor and not enough for knowing what it is.
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You stretch your arm and rotate around the center of yourself in the horizontal plane. Suppose you make 2 full revolutions every 1 second, and the distance from the center of your body to the tip of your finger is 1.2 m.
Find:
(a) Find the angular speed of your rotation
(b) Find the period of rotation.
(c) Find the speed of the tip of your finger
(a) The angular speed of the rotation is 12.57 rad/s
(b) The period of the rotation is 0.5 s.
(c) The speed of the tip of your finger is 15.08 m/s.
Angular speed of the rotationThe angular speed of the rotation is calculated as follows;
ω = 2πN
where;
N is number of revolutionsω = 2π x (2) = 4π = 12.57 rad/s
Period of rotation[tex]\omega = 2\pi f\\\\f = \frac{\omega}{2\pi} \\\\T = \frac{1}{f} = \frac{2\pi}{\omega} \\\\T = \frac{2\pi}{4\pi} = 0.5 \ s[/tex]
Speed of your fingerv = ωr
v = 12.57 x 1.2
v = 15.08 m/s
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