Answer:
CANT SOO SORRY
Explanation:
Answer:
The answer is 29.8 (b)
Explanation:
I just took a quiz with this question on there and this was the answer.
_____ is part of the first line of defense against pathogens.
T cells
Skin
Inflammation
B cells
Which of the following describes a referee's job?
A. Cheering the players on.
O B. Keeping score for the team on offense.
C. Supervising the game to make sure teams are playing fairly.
O D. Settling arguments between players.
Answer:
C. Supervising the game to make sure teams are playing fairly
Answer:
The answer is C
Explanation:
A thermometer is placed in water in order to measure temperature. What would cause the liquid in the thermometer to drop?
Answer:The kinetic energy of the water molecules decreases. ... The motion of the particles in the substance decreases, and the temperature of the substance increases.
Explanation:
Answer:
The molecules in the thermometer’s liquid spread apart.
Explanation:
A rural mail carrier logged the mileage on the odometer at the start of the mail route as 31,500 miles. After 6.5 hours, the carrier returned the truck and recorded the mileage at 31,713 miles. What was the average velocity of the mail truck? Explain your reasoning.
Answer:[tex]32.77\ mi/hr[/tex]
Explanation:
Given
Initially Reading on the odometer is [tex]31,500\ miles[/tex]
Final reading on the odometer is [tex]31,713\ miles[/tex]
Time taken is [tex]t=6.5\ hr[/tex]
average velocity [tex]=\dfrac{\text{Displacement}}{\text{time}}[/tex]
[tex]v_{avg}=\dfrac{31713-31500}{6.5}[/tex]
[tex]v_{avg}=\dfrac{213}{6.5}[/tex]
[tex]v_{avg}=32.77\ mi/hr[/tex]
Thus the average velocity of mail truck is [tex]32.77\ mi/hr[/tex]
Active noise cancelling headphones measure the various sound
waves of the environment around them and produce an inverted wave
of what it "hears". This process partially cancels the noise outside of
the headphones. What is this process called?
Select one:
A)Destructive Interference
B)The Doppler Effect
C)Constructive Interference
D)Resonance
Answer: A) Destructive Interference
Explanation: Wave Interference can be simply defined as a phenomenon that result into creating a higher amplitude, lower amplitude or thesame amplitude of wave as two or more waves superpose.
Destructive Interference is when two waves with opposite or different amplitude but equal frequency cancel the effect of each other out as they superpose.
The active noise cancelling headphones produces an inverted wave to cancel out the noises it picks from it's surrounding, this process is called Destructive Interference.
When it is 32º Farenheit, what is the temperature in degrees Celsius?
a.
-32º C
b.
0º C
c.
10º C
d.
12º C
Answer:
The answer is B.
Explanation:
If 212 degrees Fahrenheit is 100 degrees Celsius, then 32 degrees Fahrenheit is 0 degrees Celsius.
Answer: B
Explanation:
Select the best terms from the drop-down menus that fit the nuclear medicine descriptions.
gamma-ray detection from tracers
assess disease progression, tissue function
a hybrid scan that involves nuclear medicine and X-ray imaging
radiation treatment near or within the tumor from implanted "seeds"
Answer:
Hi there, so gamma-ray detection from tracers: Pet Scan, assess disease progression, tissue function: Nuclear Medicine Scan, a hybrid scan that involves nuclear medicine and x-ray imaging: PET/CT, and lastly radiation treatment near or within the tumor from implanted "seeds": Brachytherapy. Hope this helps <3.
Explanation:
btw you cute <3.
Answer:
Pet Scan
Nuclear Medicine
PET/CT
Brachytherapy
1. What is the intensity of a sound when an observer is 10.0 m from the speaker
that has power of 200. W?
Answer:
About 133 db.
Explanation:
Sound Intensity Level in db (SIL db) is equal to 10log (base 10) times the ratio of the sound intensity at 200 watts (I) relative to the sound intensity of the reference sound intensity (I sub 0), which by default is equal to 10⁻¹² W/m² or 0 dB.
I = 200 w / 10 m^2 = 20 w per square meter
I sub 0 = 10^-12 w per square meter
SIL = 10log ( I / I sub o) = 20 / 10^-12 = 10log ( 20^12) = 10 ( 13.3 ) = 133 db
Hope I typed this part correctly. Hard to get it in without being able to do exponents, etc. :D
A student uses a bar magnet to pick up a nail. He then touches the tip of the nail to some staples. Why do some of the staples stick to the nail? The nail and the bar magnet are now both permanent magnets. The nail has become a temporary magnet, while the bar magnet remains a permanent magnet. The nail has become a permanent magnet, while the bar magnet has become a temporary magnet. The nail and the bar magnet are now both temporary magnets.
the answer is the nail has become a temporary magnet
Answer:
The nail has become a temporary magnet, while the bar magnet remains a permanent magnet.
Explanation:
When the bar magnet takes off the nail, it magnetizes the nail. The fingerprint domains are temporarily aligned in one direction and act as a magnet. The nail becomes a temporary magnet. Therefore, when the tip of the nail hits a few staples, the lead attracts the nail and sticks to it.so correct option is b. The nail has become a temporary magnet, while the bar magnet remains a permanent magnet.Answer:
B, The nail becomes a temp. magnet while the bar magnet remains a permanent magnet
Explanation:
Did it on edgen just now
an airplane is flying west at 200km/h speeds up to 300km/h over 2 hours. what is the acceleration
The acceleration of the airplane increasing its speed from 200 km/h to 300 km/h over 2 hours is 0.00386 m/s².
Explanation:To calculate the acceleration of an airplane which increases its speed from 200 km/h to 300 km/h over a period of 2 hours, you need to use the formula for acceleration, which is the change in velocity Δv divided by the time interval Δt. In this case, the change in velocity is 300 km/h - 200 km/h = 100 km/h.
However, since acceleration is typically expressed in m/s², we should first convert the speeds from km/h to m/s. Doing so, we get approximately 55.56 m/s - 27.78 m/s = 27.78 m/s as the change in velocity.
Given the time interval is 2 hours, it should also be converted to seconds, resulting in 2 hours × 3600 seconds/hour = 7200 seconds.
The acceleration can now be calculated as:
Δv = 27.78 m/s
Δt = 7200 s
Acceleration (a) = Δv / Δt = 27.78 m/s / 7200 s = 0.00386 m/s²
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Which of the following processes does not require the presence of particles of matter?
A.radiation
B.conduction
C.convection
D.combustion
Radiation is the process that does not require the presence of particles of matter because it has the ability to propagate without the presence of any medium.
What is radiation?Radiation refers to the light energy that comes from a source such as sun. This radiation travels through space at the speed of light that has a wave like properties.
So we can conclude that radiation is the process that does not require the presence of particles of matter because it has the ability to propagate without the presence of any medium.
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ASAP pls will mark brainiest
1. False, the relationship between mass and inertia is actually described by Newton's 1st law in which an object will remain still without the tendency to change unless a force is placed upon it.
2. True, Newton did determine a direct relationship between force and mass because the greater the mass, the more force is required.
3. True, any change in velocity is called acceleration, for example, there is deacceleration, zero acceleration, or normal acceleration.
4. True, the greater the force applied to an object, the greater it will accelerate but it also does depend on the mass of an object.
5. False, if the mass of an object is increased, then the given net force will not help it to accelerate.
6. False, a net force of 1N applied to a mass of 1kg does not result in acceleration of 0.5m/s^2 because the net force of a 0.5m/s^2 acceleration is 0.5N.
7. True, the weight of your body does equal mass times gravitational acceleration on earth which is 9.8m/s^2.
8. False, the weight of the 10kg object is heavier than the 5kg object resulting in a slower acceleration.
9. False, the real way to find acceleration is change in velocity over time taken.
10. False, the acceleration of an object depends on the object's weight.
A wave with a frequency of 90 Hz is traveling at a speed of 250 m/s
Answer:
The wavelength of wave is 2.78 m.
Explanation:
Frequency of a wave is 90 Hz
Speed of a wave is 250 m/s
It is assume to find the wavelength of wave. The formula of speed is given by :
[tex]v=f\lambda\\\\\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{250}{90}\\\\\lambda=2.78\ m[/tex]
So, the wavelength of wave is 2.78 m.
A wave traveling at a speed of 0.09 meters per second has a frequency of 3Hz. What is its wavelength? (Formula: wavespeed = wavelength x frequency)
0.01m
0.03m
0.09m
0.27m
Answer:
The correct option is (b) i.e. 0.03 m.
Explanation:
We have,
Speed of a wave is 0.09 m/s and the frequency of a wave is 3 Hz.
It is required to find the wavelength of a wave.
The speed of a wave in terms of wavelength and frequency is given by :
[tex]v=f\lambda\\\\\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{0.09}{3} \\\\\lambda=0.03\ m[/tex]
So, the wavelength of a wave is 0.03 m.
(30 POINTS!! and BRAINLIEST) The majority of visible stars are _______ stars.
a. Neutron
b. Red Giant
c. White Dwarf
d. Main Sequence
Answer:
The correct answer would be D. Main Sequence.
Explanation:
is calcium atom an acid or base?
Answer:
Base
Explanation:
Answer: base
Explanation: the basic unit of a chemical element.
Which of the following facts about electromagnetic radiation has made it possible for scientists to gather information about Venus' rocky surface? A. Ultraviolet rays have wavelengths that are too short to be seen with the unaided eye. B. All light travels at the same speed through the vacuum of outer space. C. Infrared and radio waves can pass through very dense materials without interference. D. White light is made up of all the colors of the visible spectrum.
Answer:
C. Infrared and radio waves can pass through very dense materials without interference.
Explanation:
It was my study island question.
Answer:
C. Infrared and radio waves can pass through very dense materials without interference.
Explanation:
i just did it hope it helped
A wave has a wavelength (A) of 2.6 m. The speed (v) of that wave is 35 m/s. What is the frequency (f) of the wave
Answer:
13.46
Explanation:
formula is Wavelength x Frequency
An engine can exert a force of 1,000 newtons. How fast can this engine
accelerate:
a. a 1,000-kg car?
b. a 2,000-kg car?
Answer:
a. a 1,000-kg car
Explanation:
Q: F = ma
(a) F = 100n
M = 1000vg
A = ?
--> F = ma
--> a = f/m
a = 1000/1000 a= 1m/8*2 (b) F = 1000N
m = 2000 vg
a = ?
--> F = ma
a = f/m
a = 1000/2000
a = 0.5 m/8*2
a) The acceleration of the engine of the [tex]1000kg[/tex] mass of car is 1m/s².
b) The acceleration of the engine of the [tex]2000kg[/tex] mass of car is 0.5m/s².
Given the data in the question;
Mass of car 1; [tex]m_1 = 1000kg[/tex]Mass of car 2; [tex]m_2 = 2000kg[/tex]Force exerted; [tex]F = 1000N[/tex]To determine the acceleration of each of the two cars, we use Newton's Second Law of Motion:
[tex]F = m*a[/tex]
Where m is mass of the object and a is the acceleration.
For Car 1 { mass 1000kg}
[tex]1000N = 1000kg * a\\\\1000kgm/s^2 = 1000kg * a\\\\a = \frac{1000kgm/s^2}{1000kg}\\\\a = 1m/s^2[/tex]
Therefore, given the force exerted, the acceleration of the engine of a [tex]1000kg[/tex] mass of car is 1m/s².
For Car 2 { mass 2000 kg }
[tex]1000N = 2000kg * a\\\\1000kgm/s^2 = 2000kg * a\\\\a = \frac{1000kgm/s^2}{2000kg}\\\\a = 0.5m/s^2[/tex]
Therefore, given the force exerted, the acceleration of the engine of a [tex]2000kg[/tex] mass of car is 0.5m/s².
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An object is 2.0 m in front of a plane mirror. Its image is:?
The image of an object placed 2.0 meters in front of a plane mirror appears 2.0 meters behind the mirror, consistent with the Law of Reflection.
For plane mirrors, the Law of Reflection states that the angle of incidence is equal to the angle of reflection. This principle tells us that the image of an object will appear behind the mirror at the same distance as the object is in front of it. So if an object is placed 2.0 meters in front of a plane mirror, the reflected rays will appear to converge, and the image will seem to be 2.0 meters behind the mirror. Ray 1, traveling normal to the mirror, reflects back on itself, while Ray 2, traveling at a 5° angle, also reflects at a 5° angle on the other side of the normal. Thus, both rays will appear to originate from a point that is the same distance from the mirror as the object, creating a virtual image that is 2.0 meters behind the mirror.
ILL MARK BRAINLIEST
what type of wave is shown below?
A. Transverse wave
B. Longitudinal wave
C. Combined wave
D. Sound wave
Answer: B
Longitudinal wave
Explanation:
Transverse waves have crests and troughs
Longitudinal waves have compressions and rarefactions. A compression is where the density of the wave medium is highest. While a rarefaction is where the density of the wave medium is lowest.
Since sound wave is a longitudinal wave. And longitudinal wave exists apart from sound, we can therefore conclude that it's a longitudinal wave in spring.
Answer
C. Combined wave
Explanation:
I just took it
How do you calculate the speed of a wave? Write and label the formula.
Answer:
Wavelength x Frequency
At a constant pressure, 10 L of a gas at 546 K is cooled to 273 K
What would be the final volume of the gas?
Answer:
5 L
Explanation:
Ideal gas law:
PV = nRT
If P, n, and R are constant, then:
n₁R/P₁ = n₂R/P₂
Using ideal gas law, we can rewrite this as:
V₁/T₁ = V₂/T₂
This is known as Charles' law.
Plugging in values:
10 L / 546 K = V / 273 K
V = 5 L
Answer: 4.51 L
Explanation:
The distance between 2 corresponding (similar) parts of a wave (example- crest to crest) is its _______________. *
-trough
-frequency
-amplitude
-wavelength
Answer:
Wavelength
Explanation:
A wave can be defined in terms of its frequency, wavelength, amplitude etc.
The distance between two corresponding parts of a wave, for example from crest to crest or trough to trough is called its wavelength.
It is represented by [tex]\lambda[/tex].
The relation between frequency, speed of a wave and its wavelength is given by :
[tex]v=f\lambda[/tex]
So, the correct option is (4) "wavelength".
The diagram below shows a happy family of mice, with two parents and four offspring. However, one of the offspring mice is an imposter. The black-fur parent has the genotype FF Ee, and the white-fur parent has the genotype ff Ee. Given these parent genotypes, which offspring mouse could not have been born to these parents?
Mouse parents and offspring
A. Offspring A (Ff Ee)
B. Offspring B (Ff EE)
C. Offspring C (Ff ee)
D. Offspring D (ff EE)
Answer:
The answer is D
Explanation:
Got it right on gizmo
From the given parent genotypes, the offspring D (ff EE) mouse could not have been born to these parents. Hence, option D is correct.
What is Genotype?A person's entire genetic makeup is known as their genotype. Genotype can also refer to the genotypes or variations that a person carries in a certain gene or genetic region. Ploidy, another term for the number of books of each chromosomal found in a species, is a factor that determines how many variants an individual should have in a given gene.
A person has two alleles for each gene in a polymorphic species like humans, since there are two complete sets of chromosomes in these organisms. It is said that a genotype is homozygous if both alleles are the same. Heterozygous genotypes are those when there are two or more distinct alleles.
To know more about genotype:
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A student wants to design an investigation to determine if an object has potential energy.
What are some questions she should ask that would help her determine if an object has
potential energy? (Select all that apply)
(2 Points)
Does the object have kinetic energy?
Does the object move when it is released from rest?
Was work done on the object to lift it in the air?
Does a force act on the object?
Is the object part of a system?
Answer:
Explanation: Does the object move when it is released from rest?
Is the object part of a system?
Potential energy can be described as 3 characteristics that a specific object has:
The shape of an object,
The position of an object, and
Its readiness to transform into Kinetic energy.
She should ask the following to help her determine if an object has
potential energy
Does the object move when it is released from rest?
Is the object part of a system?
The student should ask if work was done to lift the object and if a force acts on it, as these help determine the potential energy.
To determine if an object has potential energy, the student should ask the following questions:
Was work done on the object to lift it in the air? - This will help determine if gravitational potential energy is involved.Does a force act on the object? - This questions if there are forces such as gravity or elastic forces that could contribute to potential energy.The questions regarding kinetic energy and movement upon release are less directly related to potential energy, as they address the object's kinetic energy status instead. The consideration of a system may be relevant depending on context, but identifying potential energy primarily focuses on the object's position and forces acting upon it.
A hockey player shoots a puck across the ice with kinetic energy 63) and velocity 28 m/s. What is the mass of the puck?
Answer:160 g
Explanation:Start with the equation [tex]KE = 1/2mv^{2}.[/tex] This becomes [tex]m = 2KE/v^{2}[/tex]. Replace the variables with values and get (2*63)/28^2 = 160 g.
Final answer:
To find the mass of the puck, we use the kinetic energy formula: KE = ½mv². With the given kinetic energy of 63 Joules and velocity of 28 m/s, the calculation reveals that the mass of the puck is 0.1607 kg.
Explanation:
The student has asked a physics question relating to the concept of kinetic energy and its relation to mass and velocity. Kinetic energy (KE) is given by the equation KE = ½mv² where m represents mass and v represents velocity. Given kinetic energy is 63 Joules and velocity is 28 m/s, we will solve for mass (m).
Step 1: Write down the kinetic energy formula: KE = ½mv²
Step 2: Plug in the values: 63 J = ½m(28 m/s)²
Step 3: Simplify and solve for m:
63 J = ½m(784 m²/s²)
63 J = 392m (Joules)
m = 63 J / 392 (J/kg)
m = 0.1607 kg
The mass of the puck is 0.1607 kilograms.
Which statements correctly compare the meaning of the terms speed and velocity? Select all that apply.
A. Velocity is just a more scientific word for speed.
B. Both terms describe how fast an object is moving.
C. Only velocity also describes the direction of an object.
D. Only speed can be used if an object is moving at a constant rate.
E. Most of the time the terms can be used interchangeably.
Answer:
c
Explanation:
If Faraday had used a more powerful battery in his experiments with electromagnetic induction, what effect would this have had on his galvanometer's measurements of current when the battery was fully connected? Explain your reasoning for brainliest.
Answer:
The value of current generated would increase.
Explanation:
Electromagnetic induction is the process by which an electromotive force is induced due to a variation of magnetic field.
The induced current is directly proportional to rate at which the coil cuts the magnetic field. Using more powerful battery in the experiment would increase the rate at the the coil cuts the magnetic field, therefore increasing the rate of variation in the magnetic field. This effect would cause a greater deflection on the galvanometer's scale, showing an increase in the current generated.
This experiment proves that an alternating current can be produced from magnetic field.
Final answer:
A more powerful battery in Faraday's experiments would have increased the induced electromotive force (EMF) causing the galvanometer to register a more significant deflection corresponding to the stronger magnetic field produced when the primary circuit was connected or disconnected.
Explanation:
Effect of a More Powerful Battery on Faraday's Experiment
British physicist Michael Faraday's experiments on electromagnetic induction were ground-breaking in showing the connection between electricity and magnetism. The use of a more powerful battery in Faraday's experiments would have affected the induced electromagnetic force (EMF) in the secondary coil. When Faraday connected his apparatus—comprising two coils, one known as the primary coil connected to a battery, the other referred to as the secondary coil connected to a galvanometer— he noticed an effect on the galvanometer only when the magnetic field was changing.
If a more powerful battery had been used, the current flowing through the primary coil would have been stronger. This would have created a more intense magnetic field. According to Faraday's law, the induced EMF in a circuit is proportional to the rate of change of magnetic flux. Therefore, with a stronger initial magnetic field, the rate of change of this field, and thus the induced EMF upon connecting and disconnecting the battery, would have been greater. The galvanometer would have registered a more significant deflection when Faraday either established or broke the circuit, corresponding to the moments of connection and disconnection of the battery.
Summarize Newton’s First Law