Answer:
leaf margins
Explanation:
Scientists study ice cores and leaf margins to learn about the past climates.
Further explanation :
Leaf margins are an indicator of the temperature in which a tree lives or lived. Paleobotanists use the margins of fossil leaves to infer past temperatures.
Answer:
Snail shells
Explanation:
Yea surprising answer but like this is from the web -> "New research shows that snail shells retain their carbon and oxygen isotope signatures after being boiled and, through those proxies, likely still preserve an accurate record of past temperature, rainfall, and vegetation."
Sorry if wrong and hope it helps! :)
What label should mateo place in the marked cell? uses electrical energy provides electrical energy measures electric current controls electric current
The product label which Mateo should place in the marked cell is that it: B. provides electrical energy.
What is a product label?A product label can be defined as a paper-document with specific information about the chemical elements, nutrients, and other chemical compounds that are present in a product and its general use or function.
In this scenario, the product label which Mateo should place in the marked cell shown in the image attached below is that, this product was designed and developed to provide electrical energy, based on the electrical symbol for battery.
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how to convert 54km.h to m.s
Answer:
15m/s[tex] \: [/tex]
Explanation:
Before converting , Let's recall this :
1 km = 1000 metres1 hour = 3600 seconds[tex] \: [/tex]
Now, Let's Convert it :
[tex] \\ \longrightarrow \qquad \sf \: 54km / hr \\ [/tex]
[tex]\\ \longrightarrow \qquad \sf \: \frac{54 \times 1km}{1hr} \\ [/tex]
[tex]\\ \longrightarrow \qquad \sf \: \frac{54 \times 1000m}{3600s} \\ [/tex]
[tex]\\ \longrightarrow \qquad \sf \: \frac{54000 m}{3600s} \\ [/tex]
[tex]\\ \longrightarrow \qquad \sf \: \frac{540\cancel{0 }\cancel{0} m}{36 \cancel{0 }\cancel{0}s} \\ [/tex]
[tex]\\ \longrightarrow \qquad \sf \: \frac{540 m}{36s} \\ [/tex]
[tex] \\ \longrightarrow \qquad \frak{\pmb{ 15m /s}} \\ [/tex]
do you expect an echo to return to you more quickly on a hot day or a cold day?
Answer:
more quickly on a hot day
Explanation:
Urgent help needed in number four.
Thank you in advance!
The energy produced by the headlamp at the end of 5 minutes is determined as 1,440 J.
Energy supplied by the lamp
The energy supplied by the lamp is calculated as follows;
E = Pt
E = IVt
where;
I is current = 0.4 AV is voltage = 12 Vt is time = 5 mins = 5 x 60 s = 300 sE = 0.4 x 12 x 300
E = 1,440 J
Thus, the energy produced by the headlamp at the end of 5 minutes is determined as 1,440 J.
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What are the characteristics of the bowling ball that give it lots of momentum?
a. it's big
b. it's heavy
c. it's moving quickly
Answer:
b i think
Explanation:
The human pupil, when maximally dilated, has a diameter of roughly 10 mm. How much more light does the primary mirror of the Magellan telescope (measuring 6 m in diameter) collect compared to the human eye
The amount of light collected by Magellan telescope with respect to human eyes is 1.13 x 10⁶ times that of human pupil.
Amount of light collect by human pupilThe amount of light that will pass through the given area of human pupil when maximally dilated is calculated as follows;
A = πd²/4
A = π(0.01)²/4
A = 2.5 x 10⁻⁵π m²
Amount of light collect by Magellan telescopeA = πd²/4
A = π(6)²/4
A = 9π m²
with respect to human eyes = ( 9π m²)/(2.5 x 10⁻⁵π m²)
= 1.13 x 10⁶ x human pupil
Thus, the amount of light collected by Magellan telescope with respect to human eyes is 1.13 x 10⁶ times that of human pupil.
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Explain the difference between the direction of force and the plane of application of force. Use a diagram to help you.
The direction of force refers to the path along which the force acts. The plane of application of force, on the other hand, is the surface or area where the force is applied
What is the difference between the direction of force and the plane of application of force?The direction of force refers to the path along which the force acts. It is the straight line in which the force is being applied. For example, if you push a box on the ground, the direction of force is the line of action of the force vector that points in the direction of the push.
The plane of application of force is the surface or area where the force is applied.
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A 0.025 kg piece of clay is thrown into a wall and has a speed of 9 m/s before it strikes the wall. Find the
change in momentum, of the clay and the impulse exerted on the clay if it does not bounce from the wall.
Answer:
The impulse experienced by the object equals the change in momentum of the object. In equation form, F • t = m • Δ v. In a collision, objects experience an impulse; the impulse causes and is equal to the change in momentum.
Explanation:
When A 0.025 kg piece of clay is thrown into a wall and has a speed of 9 m/s before it strikes the wall then change in momentum 22.5 kg.m/s² is and impulse is 0.225 Ns.
What is Momentum ?Momentum is defined as product of mass and velocity of the body. It is denoted by letter p and it is expressed in kg.m/s.
Mathematically p = mv.
it discuss the moment of the body. body having zero mass or velocity has zero momentum.
The dimensions of the momentum is [M¹ L¹ T⁻¹].
Given,
mass of the clay = 0.025 Kg
Speed of the clay = 9m/s
The momentum of clay is P = mv = 0.025×9 =0.225 kg.m/s
In this problem a piece of clay having mass 0.025 Kg, velocity of clay is 9m/s.
By using formula,
change in momentum of the clay = dp/dt
We must know about change in time in order to calculate change in momentum with respect to time.
Consider that the change in momentum is 0.01s.
dp/dt = p₂-p₁/t₂-t₁ = 0- 0.225/0.01 = 22.5 kg.m/s²
Impulse = dp/dt×Δt = 22.5×0.01 = 0.225 Ns
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Most asteroids orbit the Sun between:
A.
Mercury and Venus.
B.
Mars and Jupiter.
C.
Neptune and Pluto.
D.
Saturn and Uranus.
Answer:
mars and jupiterrr
Explanation:
ty for all ur help love u
What is a hydrometer?
Answer:
an instrument for measuring the density of liquids.
Explanation:
Can someone please answer this, ill give you brainliest Would be very appreciated.
A decrease in the ice caps causes a(n) (options decrease, increase) in the absorption of sunlight. This causes the global temperature to (options rise, fall) causing more ice caps to melt. As more ice caps melt, the temperature (options rises, falls). This is an example of a (options negative, positive) feedback loop.
Answer:
See below ~
Explanation:
A decrease in the ice caps causes a(n) increase in the absorption of sunlight. This cause the global temperature to rise causing more ice caps to melt. As more ice caps melt, the temperature rises. This is an example of a negative feedback loop.
A decrease in the ice caps causes a(n) increase in the absorption of sunlight. This causes the global temperature to rise causing more ice caps to melt. As more ice caps melt, the temperature rises. This is an example of a negative feedback loop.
The options are followed by
IncreaseRiserisesnegativeif you do 40 j of work in 4s, how much power did you generate?
Explanation:
GIVEN :
Work done(W) = 40 J
Time(t) = 4 s
Power (P) = ?
We know that:
W = P×t
Therefore,
P= W/t
=40/4
= 10 W
Hope it helps
Water can rise from the roots to the tops of trees due to _____.
A. capillary action
B. solubility
C. surface tension
D. homonuclear bonding
E. All of the above
Water can rise from the roots to the tops of trees due to capillary action. The correct option is A.
What is capillary action?It is the phenomenon by which the liquid rises or falls in a very small diameter tube.
In plants. its roots have very thin diameter tubes which are not visible to the eye. But the water reached to the plants through these tube to every single part of the plant i.e. from root to the fruits.
So, water can rise from the roots to the tops of trees due to capillary action.
Thus, the correct option is A.
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Where does energy go after it hits gas?
In gasoline-powered vehicles, most of the fuel's energy is lost in the engine, primarily as heat. Smaller amounts of energy are lost through engine friction, pumping air into and out of the engine, and combustion inefficiency.
What might you look for as evidence that fusion occurs inside a star?
Answer: neutrinos
Explanation:
The tape timer used in this experiment marks the paper tape with dots at fixed time intervals. How does it do that?.
The ticker tape is pulled through the timer once it's powered, which creates a dot along the length of this paper tape at fixed time intervals.
What is a ticker timer?A ticker timer can be defined as a scientific apparatus that is designed and developed to measure time in seconds. Thus, a ticker timer can be used to measure short intervals of time by making dots on a paper tape at regular (fixed) intervals.
By design, a ticker timer comprises a magnet, carbon paper disk and a ticker tape which is pulled through the timer once it's powered, so as to create a dot along the length of this paper tape at fixed time intervals.
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50 POINTS! I PROMISE BRAINLIEST IF PLEASEEE I NEED HELP!
you are designing an airport for small planes. one kind of airplane that might use this airfield must reach a speed before takeoff of at least 27.8m/s and can accelerate at 2.00m/s a)if the runway is 150m long,can this airplane reach the required speed for take off?(in this case v=24.5 m/s) b) if not, what minimum length must the runway have(193m)
(a)The required speed for take off will be 24.49 m/sec.
(b)The minimum length must the runway have 193 m.
What is speed?Speed is defined as the rate of change of the distance or the height attained. it is a time-based quantity. it is denoted by u for the initial speed while v for the final speed. its SI unit is m/sec.
(a)The required speed for take off will be 24.49 m/sec.
From the Newtons third equation of motion;
[tex]\rm v^2 = u^2+2as \\\\ v=0+2 \times 2 \times 150 \\\\ v=\sqrt{600}\\\\ v=24.49 \ m/sec[/tex]
Hence, the required speed for take off will be 24.49 m/sec.
(b)The minimum length must the runway have 193 m.
From the Newtons third equation of motion;
[tex]\rm v^2 = u^2+2as \\\\ (27.78)^2 = 0+2\times 2 s \\\\\ s=192.93 \ m[/tex]
Hence, the minimum length must the runway have 193 m.
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a 60-w light bulb radiates electromagnetic waves uniformly in all directions. at a distance of 1.0 m from the bulb, the light intensity is i0, the average energy density of the waves is u0, and the rms electric and magnetic field values are e0 and b0, respectively.
Answer:
Explanation:
1. If we increase the distance to twice it's original value, the light intensity is reduced by one-fourth, the light intensity would be:
I0/4
2. rms magnetic field is inversely proportional to distance, so the new rms magnetic field would be:
B0/2
3. average energy density is inversely proportional to the square of the distance, so the new average energy density is:
E0/4
sound travels faster in air if the air temperature is:
A wave travels at 18 m/s and has a wavelength of 3 meters. What is the frequency of the wave?
Answer:
0.1667Hz
Explanation:
by explanation frequency is given by 1/time
after carrying out the calculation of time we can easily get frequency.
time=speed/distance
=18/3
=6s
but frequency=1/time
hence=1/6
=0.1667hertz
QUESTION 1
1.1 Define the term acceleration in words
Answer:
To be better at something
Explanation:
I have Accelerated at cooking
Answer:
Acceleration means to speed up
Explanation:
Ultraviolet light is visible to bumblebees but not humans. if the wavelength of *
uv light is 100nm, what is the frequency of the light?
The frequency of the ultraviolet light given that its wavelength is 100 nm is 3×10¹⁵ Hz
Data obtained from the question Wavelength (λ) = 100 nm = 100×10¯⁹ mVelocity of light (v) = 3×10⁸ m/sFrequency (f) =? How to determine the frequency of the lightThe frequency of the light can obtain as illustrated below:
v = λf
3×10⁸ = 100×10¯⁹ × f
Divide both side by 100×10¯⁹
f = 3×10⁸ / 100×10¯⁹
f = 3×10¹⁵ Hz
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Which nucleus completes the following equation?
212 86 Rn-> 4 2 He+?
Answer:
A
Explanation:
208+4=212
84+2=86
The correct answer is A
What is the acceleration of a 25 kg box that has 50 N of force applied to the right?
1. 2m/s/s
2. 10m/s/s
3. 1,250m/s/s
Answer:
1. 2 m/s/s
Explanation:
Formula
Force = Mass x Acceleration
50 N = 25 kg x (a)a = 50/25a = 2 m/s/swhat is an example of digital signals?
Examples of digital signals are Computers, Digital Phones, Digital pens, etc.
What is signal?Signal is defined as an electromagnetic wave that carries information through a medium. In this, the data is converted into electromagnetic signal which may be analog or digital and then sent from sender to receiver.
Signal which are discrete are known as digital signals.
Examples of digital signals are Computers, Digital Phones, Digital pens, etc.
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Answer:
Examples of digital signals are Computers, Digital Phones, Digital pens, etc.
A digital signal is a signal that represents data as a sequence of discrete values. A digital signal can only take on one value from a finite set of possible values at a given time. With digital signals, the physical quantity representing the information can be many things: Variable electric current or voltage.
Pulling up on a rope, you lift a 9.27-kg bucket of water from a well with an acceleration of 1.20 m/s2. Part A What is the tension in the rope
Can someone please answer this, ill give you brainliest Would be very appreciated.
Answer: A Because that is local I mean it is confined to a city at least i think so
Answer:
Option 3
Explanation:
All of the mentioned options are mitigation solutions. But, the question has clearly asked for local solutions, which means it has the possibility or feasibility to take place in every neighborhood no matter where you are.
The option which correctly gives this is :
An individual elects to walk or bike to work daily Choose the force diagram (freebody diagram) that best represents the forces acting on the object.
The effects of air resistance are negligible. (5 points)
A plate that is at rest on the kitchen table:
Answer:
Diagram B because a plate resting on a table has gravity acting on it and normal/air resistance force working against the gravity with the same amount of force. Forces that are balanced don't move.
Explanation:
I hope this helps
Diagram B represents the forces acting on the plate that is at rest on the kitchen table.
What is normal force?Every day, we experience the normal force.
In this instance, when we lay a plate on a kitchen table, the normal response force prevents the plate from going through the table, even if gravity is pulling the plate downward. That implies that there is a force acting to push it upward. The word "normal force" refers to the force. Normal in this context refers to being perpendicular to the ground.
Hence, in diagram B, downwards arrow represents gravitational force acting on the plate for its weight and upwards arrow represents normal force acting on the plate by the table.
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An electromagnetic am-band radio wave could have a wavelength of.
An electromagnetic AM-band radio wave could have a wavelength of 186.6 meters.
Wavelength is the distance between two consecutive points on a wave that are in phase, meaning they are at the same position in their respective cycles. It is usually denoted by the Greek letter lambda (λ) and is measured in units of length, such as meters, centimeters, or nanometers.
The relationship between wavelength, frequency, and speed of a wave is given by the formula:
wavelength = speed / frequency
where "speed" refers to the speed of the wave through a medium, and "frequency" refers to the number of cycles per second.
The AM radio band frequency ranges from 535 kHz to 1605 kHz. To find the wavelength of the AM radio wave, we can use the formula:
wavelength = speed of light / frequency
where the speed of light is approximately 299,792,458 meters per second.
Let's take the highest frequency in the AM radio band, which is 1605 kHz. We need to convert this frequency to Hertz (Hz) by multiplying it by 1000 since kHz is 10^3 times larger than Hz.
1605 kHz = 1605 x 1000 Hz = 1,605,000 Hz
Now, we can calculate the wavelength of the AM radio wave using the formula:
wavelength = 299,792,458 / 1,605,000
wavelength ≈ 186.6 meters
Therefore, an electromagnetic AM-band radio wave could have a wavelength of approximately 186.6 meters.
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