What are three types of electromagnetic waves that can be used to take
photographs??
Answers
Answer:
x-rays, Infrared rays, microwaves.
Related Questions
a lion is running at constant speed toward a gazelle that is standing still, as shown in the top figure above. after several seconds, the gazelle notices the lion and accelerates directly toward him, hoping to pass the lion and force him to reverse direction. as the gazelle accelerates toward and past the lion, the lion changes direction and accelerates in pursuit of the gazelle. the lion and the gazelle eventually each reach constant but different speeds. which of the following sets of graphs shows a reasonable representation of the velocities of the lion and the gazelle as functions of time?
Answers
The graph shown in the first option nicely plots the lion's and gazelle's velocities as a function of time, so option A is the correct answer.
Velocity is the rate of change of displacement over time.
It has SI units as m/s.The total amount of movement of an object per unit time is also called velocity. It depends on both the size and direction of the moving object.Velocity can also be called as speed when distance is taken into consideration instead of displacement.As mentioned in the problem of running at a constant speed towards a gazelle with a standing lion as shown above.
So option A is correct.
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What is the benefit of cooling down after exercise?
It allows the body to increase blood flow.
It keeps blood from pooling in the limbs.
It prepares the body for exercise.
It keeps the muscles flexed.
Answers
Answer:
It allows the body to increase blood flow.
what is jello tell me i know lets see if you know
Answers
What is the difference between a meteor shower and just the occasional meteor
Answers
Answer: (see explanation below)
Explanation:
A meteor is a meteoroid (a space rock) that enters the earth's atmosphere. Because the earth's atmosphere is very dense, the meteoroid heats up and glows. A meteor shower is when the earth passes through the debris tail produced by a comet. The debris tail contains multiple small meteoroids.
i dont need answers, i just want to know what you guys think....just anything
if energy can't be created or destroyed, then it means there must have been a certain amount of energy when the universe was born, right? Is it possible to measure how much energy there was in the beginning?
Answers
Answer:
I am not sure really.
Explanation:
I just don't know
Convert 250mm to kilometers using conversion factor
Answers
Answer:
0.00025 kilometers
Explanation:
divide the length value by 1e+6
Answer:
250 mm = 0.00025 km.
Explanation:
250 mm equal 0.00025 km
Conversion details
To convert mm to km use the following formula:
1 mm equals 0.000001 km
So, to convert 250 mm to km, multiply 0.000001 by 250 i.e.,
250 mm = 0.000001 * 250 km = 0.00025 km
(hope this helps can i plz have brainlist :D hehe)
The amount of matter in a substance or object is called:
??? What the answer
Answers
Answer:
mass!!
Explanation:
what is the maximum wind velocity for a 30° crosswind if the maximum crosswind component for the airplane is 15 knots?
Answers
The maximum wind velocity for a 30° crosswind with a maximum crosswind component of 15 knots is 30 knots.
To determine the maximum wind velocity for a 30° crosswind when the maximum crosswind component for the airplane is 15 knots, follow these steps:
1. Identify the maximum crosswind component: 15 knots.
2. Determine the crosswind angle: 30°.
3. Use the formula: Wind velocity = Maximum crosswind component / sin(crosswind angle).
In this case:
Wind velocity = 15 knots / sin(30°)
The sine of 30° is 0.5, so:
Wind velocity = 15 knots / 0.5
Wind velocity = 30 knots
So, the maximum wind velocity for a 30° crosswind with a maximum crosswind component of 15 knots is 30 knots.
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why light waves are called electromagnetic waves ?
Answers
5. Your riding a skateboard that is 1.4 kg and goingnortheast with a velocity of 19 m/s. You weigh about 52kg. What is the total momentum of you and theskateboard.What is the mass of the the skateboard.Find the combined mass.Find the velocity of you and the skateboard.
Answers
Answer:
Explanation:
Here is the information we have.
Skateboard: 1.4 kg, velocity = 19 m /s
You: weight: 52 kg, veclocity = 19m/s (since you are riding the skateboard)
Now the momentum of an object is given by
\(p=mv\)where
m = mass
v = velocity
Now in our case, the momentum of the skateboard is
\(p_{\text{skateboard}}=1.4\operatorname{kg}\cdot19m/s=26.6\operatorname{kg}\cdot m/s\)Your momentum is
\(p_{\text{you}}=52\operatorname{kg}\cdot19m/s=988\operatorname{kg}\cdot m/s\text{.}\)Therefore, the total momentum of you and the skateboard is
\(p_{\text{total}}=p_{\text{you}}+p_{\text{skateboard}}=(26.6+988)kg\cdot m/s\)\(\Rightarrow\boxed{p_{\text{total}}=1014.6\operatorname{kg}\cdot m/s\text{.}}\)The combined mass of the skateboard and you is
\(m_{\text{total}}=m_{\text{you}}+m_{\text{skateboard}}=52\operatorname{kg}+1.4\operatorname{kg}\)\(\Rightarrow\boxed{m_{\text{total}}=53.4\operatorname{kg}\text{.}}\)Hence, to summerise
total momentum = 1014.6 kg * m/s
combined mass = 53.4 kg.
A Physics student is thrown horizontally at a velocity of 12 m/s from the top of a cliff 68m high. How long does it take the student to reach the bottom of the cliff?
Answers
It takes approximately 3.3 seconds for the student to reach the bottom of the cliff.
We can solve this problem using the equations of motion, specifically the kinematic equation
h = vi*t + (1/2)*a*\(t^2\)
where:
h = height of the cliff (68m)
vi = initial velocity (12 m/s)
t = time taken to reach the ground (unknown)
a = acceleration due to gravity (-9.8 \(m/s^2\))
Since the student is thrown horizontally, there is no initial vertical velocity. Thus, vi = 0 m/s.
Substituting the given values into the equation, we get:
68m = 0m/s * t + (1/2)*(-9.8 \(m/s^2\))*\(t^2\)
Simplifying the equation:
68m = -4.9 \(m/s^2\) * \(t^2\)
Dividing both sides by -4.9 \(m/s^2\):
\(t^2\) = 13.87755
Taking the square root of both sides:
t = 3.7275 second
Therefore, it takes approximately 3.3 seconds for the student to reach the bottom of the cliff.
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at what velocity will the peak voltage of a generator be 450 v, if its 565-turn, 8.00-cm diameter coil rotates in a 0.250-t field?
Answers
The calculated velocity is 7295 rpm. Velocity is the rate and direction of an object's movement, whereas speed is the time rate at which an object is moving along a path.
According to Faraday's law of induction, an induced electromotive force is produced when a magnet rotates inside a coil. Alternatively said, mechanical energy is changed into electrical energy. Electrical generators are built on the principles of this physical phenomenon. Let's calculate the coil cross section's area A.
A=π 4 d 2 \s= 5.0265 × 10 − 3 m2
Step 2
The following equation describes the greatest induced electromotive force (or peak voltage) in a coil:
ε p=N A B ω
Step 3
Let's use the equation above to calculate the angular velocity. Recall that 1 rpm is equal to 0.10472 radians per second, and 1 tesla is equal to 1 volt per second divided by 1 square meter.
= = p N A = 7295 r pm
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A student is creating a model of a concave lens. The diagram shows her incomplete model.
Which action would best complete her model?
A
The student should draw the light moving into the lens and then exiting in converging lines.
B
The student should draw the rays of light moving into the lens and then exiting at right angles.
C
The student should draw the rays of light moving into the lens and then exiting in a straight path.
D
The student should draw the light moving into the lens and then exiting in lines that are spreading out.
Answers
Answer:
D
Explanation:
I’m pretty sure it’s correct but I don’t really know. Just trying to pass science
Answer:
The correct answer is D trust me I did the test
When the concave lens moves in it exit by spreading out like water
Fast cooling rates tends to promote transformations that result in relatively course structures (e.g. for a reaction resulting in multiple product phases, the secondary phase particles are (i) fewer in count (ii) larger in size and (iii) relatively spherical). True or False
For most materials, the formation of a glass from a liquid typically requires extremely slow cooling rates, thereby taking on the order of years or even centuries to produce. True or False
For a system below its melting point, a glass (or non-crystalline / amorphous) configuration is the most energetically stable state that is possible, since it offers the lowest Gibbs free energy for all possible solid configurations. True or False
When measured experimentally, most materials tend to exhibit the same exact temperature value for both melting and freezing (crystallization). True or False
Gray iron is a microstructure that tends to result when a cast iron of appropriate composition is cooled fairly quickly. True or False
Coarsening refers to the scenario where, upon heating and/or annealing for sufficient time, the scale of a microstructure tends to reduce (e.g. grains become smaller, secondary phase particles separate into smaller particles and become more finely dispersed, often reverting to high aspect ratio or high surface-area-to-volume ratio configurations. True or False
Answers
Answer:
1) correct answer is ii larger size
2) false, 3) false, 4) true, 5) true, 6) true
Explanation:
In this exercise, the answer is asked if the statement is true.
1) in the rapid cooling speed, there is no thermodynamic equilibrium, so the secondary phases do not have time to transform into the main one, therefore many phases appear in the products,
the correct answer is ii
2) False. The transformation of a material to the glass state requires a fixed temperature and rapid changes to reach this temperature,
3) False. The most stable state is the crystalline state, the glass states are metastable, their Gibbs energy is not the lowest possible and they must transition to the crystalline state over time, it can be years or centuries.
4) True. The melting and freezing temperatures change for each material, within the same material it always has the same value, since it corresponds to a change in the state of the system.
5) true. Cast iron is called gray because of the impurities inside that have not had time to move due to rapid cooling.
6) True. The microstructure is reduced in the process of cooling and heating
If the same pressure is exerted over a greater area will more of less force result?
more force
less force
the same amount of force
Answers
Answer:
less force
Explanation:
less force because they is increase in area and not enough energy to balance the whole equation
Answer:
the same
Explanation:
Which branch of science deals with the study of the structures shown here?
FISH
AMPHIBIAN
REPTILE
BIRD?
Answers
Answer:
Vertebrate zoology
Explanation:
Have a great day!
every gene is made of two
a).genotypes
b).alleles
c).cells
Answers
Answer:
b).alleles
Explanation:
Every person has two copies of each gene, one inherited from each parent. Most genes are the same in all people, but a small number of genes (less than 1 percent of the total) are slightly different between people. Alleles are forms of the same gene with small differences in their sequence of DNA bases.
Genes are segments of DNA that contain the instructions for the synthesis of proteins or functional RNA molecules. They are composed of two alleles. The correct answer is b) alleles.
Genes are segments of DNA that contain the instructions for the synthesis of proteins or functional RNA molecules. They are composed of two alleles, which are alternate forms of a gene that can occupy the same locus on a specific chromosome.
Therefore, Alleles can vary in their sequence of nucleotides and can determine different traits or variations of a particular characteristic. Therefore, every gene is made up of two alleles, one inherited from each parent. The correct answer is b) alleles.
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A 1=2.40 μF
capacitor is first charged by being connected across a battery with voltage b=8.00 V.
It is then disconnected from the battery and connected across an uncharged capacitor with capacitance 2=5.60 μF.
Calculate the final charge 1,f
and 2,f
on 1
and 2,
respectively.
Answers
The final charge on the first capacitor is 7.20 μC and the final charge on the second capacitor is 12.00 μC.
What do you mean by charge ?When placed in an electromagnetic field, the physical property of matter known as electric charge causes it to experience a force.
Positive and negative electric charges are the two types of charges that charge carriers, protons and electrons, commonly carry. The movement of charges produces energy.
The initial charge on the first capacitor, 1, can be calculated using the formula as follows:
Q = C × V
where,
Q is the charge,
C is the capacitance, and
V is the voltage.
By substituting the values, we get:
Q = 2.40 μF × 8.00 V
= 19.2 μC
Let's call the final charge on the first capacitor 1,f and the final charge on the second capacitor 2,f.
So, the two capacitors are now connected in parallel, their equivalent capacitance is C_eq :
C_eq = C1 + C2
C_eq = 2.40 μF + 5.60 μF
= 8.00 μF
The final charge on the equivalent capacitance is equal to the initial charge on the first capacitor,
Q_eq = Q1,f = 19.2 μC
From this, we can calculate the final charge on each capacitor:
Q1,f = (C1 / C_eq) × Q_eq
Q1,f = (2.40 μF / 8.00 μF) × 19.2 μC
= 7.20 μC
Q2,f = (C2 / C_eq) × Q_eq
Q2,f = (5.60 μF / 8.00 μF) × 19.2 μC
= 12.00 μC
Thus, The final charge on the first capacitor is 7.20 μC and the final charge on the second capacitor is 12.00 μC.
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Spring tides occurs at two of the time shown which two? how do u know ?
Answers
Spring tides are extremely wide ranges of tidal highs and lows that occur during full moon or new moon phases when the gravitational forces of the Sun and Moon are at their strongest.
Neap tides are characterized by lower high tides and higher low tides, while spring tides feature higher high tides and lower low tides. Because of this, a spring tide has a significantly wider range than a low tide (the difference in water level between high and low tide).Spring tides are the tides that occur right after a new or full moon when the difference between high and low water is the biggest. The earth, moon, and sun are in a straight line at this time, causing the gravitational pull to be at its strongest. There are more high tides than usual and fewer low tides than usual.To know more about spring tides
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a recent health screening revealed a low-density-lipoprotein (ldl) level over 130. which of the following should be prescribed? a. statins b. iron c. insulin d. glucagon
Answers
A recent health screening revealed a low-density-lipoprotein (LDL) level over 130. Statins are a medication that is often prescribed to lower LDL cholesterol levels. Therefore, option A, statins, should be prescribed.
Low-density lipoprotein (LDL) cholesterol is a type of cholesterol that can build up in the walls of arteries and cause plaque buildup. This can lead to atherosclerosis, which is a condition that can increase the risk of heart disease and stroke.
Statins are a type of medication that work by inhibiting the production of cholesterol in the liver. By reducing the amount of LDL cholesterol in the blood, statins can help to lower the risk of heart disease and stroke.
If the LDL level is over 130, the person should be prescribed statins. However, other factors such as family history, lifestyle habits, and other health conditions should also be taken into consideration when making a treatment plan.
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A hot air balloon pilot wants the balloon to quickly rise several feet higher so it will be above some trees in the distance. Which best explains how the pilot can make the balloon rise?
The pilot can adjust the temperature inside the balloon so it is equal to the temperature of the surrounding air.
The pilot can adjust the density of the air inside the balloon so it is equal to the density of the surrounding air.
The pilot can decrease the temperature inside the balloon so it is cooler than the surrounding air.
The pilot can increase the temperature inside the balloon so it is warmer than the surrounding air.
Answers
Answer:
temperature inside the balloon so it is warmer than the surrounding air
Explanation:
For the balloon to get an uplift , it should be lighter than air . That means the density of the gas inside should be less than the density of air outside . only then , weight of the balloon plus the weight of the air inside balloon will become less than the weight of displaced air outside . This can be achieved by warming up the air inside. Its temperature must exceed that of outside air.
The option that best explain how the pilot can make the balloon rise is option D. The pilot can increase the temperature inside the balloon so it is warmer than the surrounding air
An object will float in air when the density of the object is lower than the density of the air.
Increase in temperature of a gas decreases the density of the gas.
For the pilot to make the balloon rise, he must find a way to make the balloon more lighter than air. To do this, he has to increase the temperature of the balloon.
In this question, the pilot can increase the temperature inside the balloon so it is warmer than the surrounding air in order for the balloon to quickly rise several feet higher above some trees in distance.
Therefore, option D best explain how the pilot can make the balloon rise.
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A tsunami of wavelength 225km and velocity 575km/h travels across the Pacific Ocean. As it approaches Hawaii, people observe an unusual decrease of sea level in the harbors.
Approximately how much time do they have to run to safety? (In the absence of knowledge and warning, people have died during tsunamis, some of them attracted to the shore to see stranded fishes and boats.)
Answers
Under the given scenario, the people in Hawaii would have approximately 47 minutes (0.78 x 60 minutes) from observing the unusual sea level decrease to when the tsunami reaches their location.
A tsunami of wavelength 225km and velocity 575km/h travels across the Pacific Ocean. As it approaches Hawaii, people observe an unusual decrease in sea level in the harbors. To determine how much time people have to run to safety, we need to calculate the time it takes for the tsunami to reach Hawaii.
We can use the formula: time = distance/velocity.
In this case, the distance is unknown, but we can use the wavelength as a proxy. Since the wavelength is 225km, we can assume that the distance between each crest and trough of the wave is 225km. Therefore, the distance traveled by the wave in one wavelength is 2 x 225km = 450km.
Now we can calculate the time it takes for the wave to travel this distance using the given velocity of 575km/h:
time = distance/velocity
time = 450km / 575km/h
time = 0.78 hours
So the people in Hawaii would have approximately 47 minutes (0.78 x 60 minutes) from observing the unusual sea level decrease to when the tsunami reaches their location. It's important to note that this is just an estimate and the actual time may vary depending on factors such as the ocean's depth and the coastline's shape.
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A rocket of mass 5kg is travelling horizontally with a speed of 200m/s when it explodes into two parts.
one part of mass 3kg continues in the original direction with a speed of 100m/s and the other part continues in the same direction.
*Calculate the unknown speed of the other part*
(please solve with steps + explanation)
Answers
Answer:
350 m/s
Explanation:
Before the explosion, the rocket's momentum is given by:
p = m*v where
p = momentum
m = mass of the rocket
v = velocity of the rocket
Given that the mass of the rocket is 5 kg and its velocity is 200 m/s, we can calculate the momentum as:
p = m*v = 5 kg * 200 m/s = 1000 kg·m/s
After the explosion, the momentum is conserved, which means the total momentum of the two parts is still 1000 kg·m/s. We can use this principle to solve for the velocity of the second part.
Let v1 be the velocity of the 3 kg part, and v2 be the velocity of the other part. Since they are both moving in the same direction, we can write:
p = m1v1 + m2v2
where m1 = 3 kg is the mass of the first part, and m2 is the mass of the second part.
Substituting the known values, we get:
1000 kg·m/s = 3 kg * 100 m/s + m2 * v2
Solving for v2, we get:
v2 = (1000 kg·m/s - 300 kg·m/s) / m2
v2 = 700 kg·m/s / m2
We still need to find the mass of the second part. Since the rocket initially had a mass of 5 kg, and one part has a mass of 3 kg, the other part must have a mass of:
m2 = 5 kg - 3 kg = 2 kg
Substituting this into the equation for v2, we get:
v2 = 700 kg·m/s / 2 kg
v2 = 350 m/s
Therefore, the unknown speed of the other part is 350 m/s.
An object is rolled horizontally off a table. It lands on the floor 1 meter away from the base of the table. The height of the table is 2.5m. What is the initial vertical velocity of the object?
Answers
The initial vertical velocity of the object is 2.5 m/s .
How to calculate intial velocity?Initial Velocity, denoted as u, is the velocity at time period t = 0. It is the speed at which motion first occurs. There are four equations for starting velocity: (1) The starting velocity is expressed as u = v - at if time, acceleration, and final velocity are given.
Keep in mind that the INITIAL VERTICAL VELOCITY of the projectile is equal to ZERO because it is launched horizontally.
Given,
base =1m
height = 2.5
vertical velocity =2.5/1
The initial vertical velocity of the object is 2.5 m/s .
A projectile's initial velocity has both a horizontal component and a vertical component if it is thrown at an angle to the horizontal. The projectile's displacement horizontally as a result of velocity is shown by the horizontal velocity component (vx).
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There are 2 rocks sitting on 2 cliffs. One rock is sitting on a cliff that is 25 m high. The
other rock is sitting on a cliff that is 12 m high. Which rock has the greater gravitational
potential energy?
Explain.
Answers
The rock sitting on the cliff that is 25 m high has the gratest gravitational potential energy.
How do I determine the rock that has a greater potential energy?Potential energy is defined as the energy of an object by virtue of it's location. Mathematically, it is written as:
PE = mgh
Where
PE is the potential energym is the mass g is the acceleration due to gravityh is the heightTo determine the rock with the grater potential energy, we shall determine the potential energy of both rock assuming they have the same mass. Details below:
For rock sitting at 25 m high:
Mass (m) = 10 KgHeight (h) = 25 mAcceleration due to gravity (g) = 9.8 m/s² Potential energy (PE) = ?PE = mgh
PE = 10 × 9.8 × 25
PE = 2450 J
For rock sitting at 12 m high:
Mass (m) = 10 KgHeight (h) = 12 mAcceleration due to gravity (g) = 9.8 m/s² Potential energy (PE) = ?PE = mgh
PE = 10 × 9.8 × 12
PE = 1176 J
From the above calculation, we have:
Potential energy of rock at 25 m high = 2450 JPotential energy of rock at 12 m high = 1176 JThus, we can conclude that the rock sitting at 25 m high, has the gratest potential energy.
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What is the term for the amount of salts in water
Answers
Answer:
The total amount of dissolved salts in water is called, salinity.
Explanation:
A car travels 20 km South, then turns and travels 30 km East? What is the total displacement?
Answers
Answer:
Explanation:36.05 km
Given
First car travels \(r_1=20\ km\) South
then turns and travels \(r_2=30\ km\) east
Suppose south as negative y axis and east as positive x axis
So, \(r_1=-20\hat{j}\)
\(r_2=30\hat{i}\)
Displacement is the shortest between initial and final point
Dispalcement\(=r=r_1+r_2\)
Displacement\(=-20\hat{j}+30\hat{i}\)
Displacement\(=30\hat{i}-20\hat{j}\)
Magnitude \(=\sqrt{30^2+(-20)^2}\)
Magnitude\(=36.05\ km\)
Helium in the sun is produced by which process?.
Answers
Nuclear Fusion is a process by which the nucleus of the two atoms fuses to form a completely new element. The Helium in the sun is produced by the process of nuclear fusion.
Nuclear Fusion:It is a process by which the nucleus of the two atoms fuses to form a completely new element.
For Example-
In the core of the sun is very high temperature and pressure, two hydrogens nuclei fuse to form Helium.Hydrogen has 1 proton, and helium has two protons in the nucleus.Therefore, the Helium in the sun is produced by the process of nuclear fusion.
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An electric iron is Marg 20 words 500 w the units consumed by it in using it for 24 hours will be
Answers
The electric iron with a power rating of 500 watts will consume 12 kilowatt-hours (kWh) of electricity when used continuously for 24 hours.
To calculate the units consumed, we need to consider the power rating and the duration of usage. The power rating of the electric iron is given as 500 watts, which is equivalent to 0.5 kilowatts (kW). By multiplying the power rating by the time used (24 hours), we obtain the total energy consumed, which is 12 kilowatt-hours (kWh). This value represents the units of electricity consumed by the electric iron during the 24-hour period.
Therefore, the electric iron will consume 12 kilowatt-hours (kWh) of electricity when used for 24 hours continuously with a power rating of 500 watts.
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Mr. Temper, a 5-foot, 4-inch, 100-pound hothead, tells Mr. Big, a 300-pound professional wrestler, that he is going to "make him regret he set foot in this bar." At the same time, Temper clenches and raises his fists. Big looks at Temper from head to toe and responds, "yeah, right." Big can sue Temper for: a. assault
b. battery
c. assault and battery
d. Big has no cause of action
Answers
Big has no cause of action against Temper. In this scenario, while Temper may have made a verbal threat and raised his fists in a confrontational manner, there is no indication that he physically touched or harmed Big.
Assault refers to the act of intentionally causing apprehension or fear of imminent harmful or offensive contact. Battery, on the other hand, involves the intentional and harmful or offensive physical contact with another person without their consent.
In this case, Temper's actions may constitute assault due to the verbal threat and raising his fists, creating an atmosphere of fear or apprehension. However, since no physical contact or harm occurred, battery is not applicable. Therefore, the appropriate response is option d: Big has no cause of action against Temper.
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