Answer:
Explanation:Standing flood waters can also spread infectious diseases, contain chemical hazards, and cause injuries. Each year, flooding causes more deaths than any other hazard related to thunderstorms. The most common flood deaths occur when a vehicle is driven into hazardous flood waters.
Which change corrects the error in his steps?
Charlie writes the steps shown to describe the use
of a transistor in a closed circuit with flowing current.
Using a Transistor to Amplify a Signal
1. Current (1) flows from the base to the emitter.
2. An input causes a small increase in voltage
across the base and emitter.
3. Ji increases a small amount.
4. Current (12) flowing from the emitter to the
collector changes a large amount.
O Change the title to "Using a Transistor as a
Switch."
O Change step 1 to say that no current flows in the
transistor at the start.
O Reverse the sizes of the changes in current in
steps 3 and 4.
O Reverse the direction of current in step 4.
Answer:
answer is D
Explanation:
took test and got 100%
The change that corrects the error in his steps is reverse the direction of current in step 4.
What is amplifier?An amplifier, is an electronic device that can be used to increase output power.
Observed steps in using a transistor to Amplify a SignalCurrent (1) flows from the base to the emitter. An input causes a small increase in voltage across the base and emitter. Ji increases a small amount.Current (2) flowing from the emitter to the collector changes a large amount.Thus, the change that corrects the error in his steps is reverse the direction of current in step 4.
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Two forces each of magnitude 25N acts in opposite direction at the opposite end of a circular ring. If the diameter at the ring is 65cm. Calculate the magnitude of the couple acting on the ring.
Answer:
The magnitude of the couple is 16.25 Nm.
Explanation:
A couple is a force that always produce a turning effect of objects on which it is applied. It has applications in doors, taps, revolving doors etc. Couple is a two equal but opposite force applied on an object.
couple = force x length
From the given question, the couple acting on the ring can be determined as;
couple = 25 x 0.65
= 16.25 Nm
The magnitude of the couple is 16.25 Nm.
The edge effect in habitats are caused by:
A. habitat fragmentation
B. biological magnification
C. eutrophication
D. destruction of habitat
The edge effect in habitats is caused by habitat fragmentation. Therefore, option A is correct.
Habitat fragmentation refers to the process by which large, continuous habitats are divided into smaller, isolated fragments due to human activities or natural events. It occurs when natural landscapes are altered or disrupted. It results in the fragmentation of once-continuous habitats into smaller patches.
This fragmentation can happen through various means, such as the construction of roads, urban development, agriculture, deforestation, or natural events like wildfires or floods.
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A mass of .1539 kg moves down a 5 meter ramp in 2 seconds. What
is the velocity and the KE developed by the moving mass
Answer:
Velocity=2.5m/s
KE=4809.375J
Explanation:
Velocity=5m/2s=2.5m/s
KE=½×1539kg×(2.5m/s)²
KE=4809.375J
what's the main function for the human digested system
Answer:
The function of the digestive system is digestion and absorption. Digestion is the breakdown of food into small molecules, which are then absorbed into the body.
Explanation:I hope it helped
4. A bowling ball and a baseball are dropped in a vacuum. Which would hit
the ground first?
help help help help help help help help help help help help
Answer:
well i may be wrong but i geussed letter B
Explanation:20m/s2squaredAnswer:
letter B
Explanation:
20m/s2squared
llus
A block is on a surface with
μς
0.325. It takes 4.11 N to
break it free from static friction.
How much normal force acts
on the block?
(Unit = N)
Enter
Answer: 12.6 newtons
Explanation:
Take the equation, static force equals static friction times normal force. ( F = μn )
Divide both sides by static friction so normal force is the answer.
( F / μ = n )
Insert your numbers (4.11 F and 0.325 μ) into the equation to get your answer.
( 4.11 / 0.325 = n )
n = 12.6
My first time helping someone and future people on this site. This is the answer I put in and got right.
ACELLUS GANG STAND UP!
Can anybody help with this GCSE physics question?
Answer:
[tex] volume = 18.45 \times 18.45 \times 18.45 \\ = 0.00000628 \: {m}^{3} \\ mass = density \times volume \\ = 8.0 \times {10}^{3} \times 0.00000628 \\ = 0.05\: kg[/tex]
[tex] \small \boxed{ \boxed { becker}}[/tex]
〰〽
A 100 kg cyclist travels at 4.5 m/s. A 50 kg gorilla is dropped straight down onto her. What is the new speed of the system?
Mass of cyclist = 100 kg
Mass of gorilla = 50 kg
Initial speed = 4.5 m/s
Let Final speed = s
100 x 4.5 = (100 + 50) x s
450 = 150s
S = 450/150
S = 3
The new speed is 3m/s
A student uses a 320 Hz tuning fork during a lab investigation into the speed of sound. If the air temperature in the classroom is 20
degrees Celsius, what is the wavelength of the sound waves produced by the tuning fork?
Answer:
Hecht.
Explanation:
In the center of the Milky Way galaxy is a
A
Answer:
a super massive blackhole
______ is a chemical reaction between an acid and a base that forms a salt and water. Group of answer choices Neutralization Dissociation Titration Ionization
Answer:
neutralization
Explanation:
this is because
acid + base ---> salt + water
Astronomers categorize galaxies into a handful of basic shapes. What can you conclude from this fact?
From the that astronomers categorize galaxies into a handful of basic shapes, it can be concluded that the all galaxies are made from the same forces.
Astronomers have categorized galaxies into three main categories,
Elliptical Galaxies:
These galaxies have smooth ellipsoidal shape. They are most abundant type. For example- Messier 49
Spiral galaxies:
These galaxies have a spiral shapes with many hand like structures. For example- Milky way.
Irregular Galaxies:
They do not have any specific shape.
Therefore, from the that astronomers categorize galaxies into a handful of basic shapes, it can be concluded that the all galaxies are made from the same forces.
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Helppp pleaseeeeeeee. NO LINKS. HELP HELP HELP
Answer:
Choice A
Explanation:
The lower the point the higher the kinetic energy because Mechanical energy is conserved and the Gravitational Potential Energy gets lower when the height is lower
h2+o2 - h2o mass
Please help
H2O2 H2O
H2 + O2 → H2O. Word equation: Hydrogen gas + Oxygen gas → water. Type of Chemical Reaction: For this reaction we have a Combination reaction. Balancing Strategies: For this reaction it is helpful to start by changing the coefficient in front of H2O and so that you have an even number of oxygen atoms.
An empty water tank has a rectangular base with side lengths of 1.2 m and 2.3 m. The weight of the tank applies a pressure of 350 Pa to the surface it is resting on. What is the weight of the tank?
Answer:
Weight = 966 Newton.
Explanation:
Given the following data;
Length = 1.2 m
Width = 2.3 m
Pressure = 350 Pa
To find the weight of the tank;
We know that weight is the force of gravity acting on an object multiplied by its mass.
Weight = mg = force
Hence, we would determine the force using the parameters that were given.
But we would first determine the area of the rectangular tank.
Area of rectangle, A = length * width
A = 1.2 * 2.3
A = 2.76 m²
Mathematically, pressure is given by the formula;
Pressure = force/area
Force = pressure * area
Substituting into the formula, we have;
Force = 2.76 * 350
Force = 966 Newton
Therefore, the weight of the tank is 966 Newton.
What is the net force in the following diagram?
A 75.6-kg circus performer is fired from a cannon that is elevated at an angle of 37.2° above the horizontal. The cannon uses strong elastic bands to propel the performer, much in the same way that a slingshot fires a stone. Setting up for this stunt involves stretching the bands by 2.70 m from their unstrained length. At the point where the performer flies free of the bands, his height above the floor is the same as the height of the net into which he is shot. He takes 2.34 s to travel the horizontal distance of 26.9 m between this point and the net. Ignore friction and air resistance and determine the effective spring constant of the firing mechanism.
Answer:
The effective spring constant of the firing mechanism is approximately 21.804 N/m
Explanation:
The mass of the circus performer, m = 75.6 kg
The angle of elevation above the horizontal, θ = 37.2°
The instrument the cannon uses to propel the performer = Strong elastic band
The length by which the band stretches, x = 2.70 m
The height of the performer above the floor at the point the performer flies free of the bands = The height of the net into which he is shot
The time he takes to travel the horizontal distance between the point he is shot and the net, t = 2.34 s
The horizontal distance between the the point he is shot and the net, dₓ = 26.9 m
Therefore, the horizontal component of the velocity, vₓ, can be found with the following kinematic equation of motion;
vₓ = dₓ/t
∴ vₓ = 2.70 m/(2.34 s) = (15/13) m/s
By the resolution of the initial velocity, 'v', into the horizontal and vertical component, we have;
The horizontal component, vₓ = v × cos(θ)
∴ v = vₓ/(cos(θ))
v = (15/13)/(cos(37.2°)) ≈ 1.45
The initial velocity, v ≈ 1.45 m/s
The kinetic energy given to the circus performer by the elastic band, K.E., is given as follows;
K.E. = (1/2)·m·v²
Where;
m = The mass of the performer = 75.6 kg
v = The velocity given to the performer ≈ 1.45 m/s
∴ K.E. ≈ (1/2) × 75.6 × 1.45² ≈ 79.475
∴ K.E. ≈ 79.475 J
The kinetic energy, K.E., given to the performer, (1/2)×m×v² = The kinetic energy of the elastic band = (1/2)×k×x²
Where;
k = The effective spring constant of the firing mechanism
x = The extension of the sling = 2.70 m
Therefore, we get;
K.E. = (1/2)·m·v² = (1/2)·k·x²
∴ K.E. ≈ 79.475 J = (1/2) × 75.6 × 1.45² = (1/2) × k × (2.70 m)²
∴ 79.475 J ≈ (1/2) × k × (2.70 m)²
k = 79.475 J/((1/2) × (2.70 m)²) ≈ 21.804 N/m
The effective spring constant of the firing mechanism, k ≈ 21.804 N/m.
a bike moves 60 meters in 12 second. calculate the speed of the bike
Answer:
Speed=Distance
Time
=60
12
=5m/s
PLEASE HELP 20 POINTS AND BRAINLIEST.
Answer:
line c represents slowing
line b represents constant speed
like a represents speeding up
An observer notices that 12 waves pass by in 4 seconds. What is the frequency of these waves? 0.33 Hz 16 Hz 48 Hz 3 Hz
Answer:
Frequency = 3 Hz
Explanation:
Frequency is a measure of Hertz. Recall that Hertz is the unit expressing cycles/second, where one second is the denominator of the fraction for simplicity. If there are 12 waves every four seconds, and one wave represents one cycle, dividing 12 waves by 4 seconds will give the answer of 3 waves (or cycles) per one second.
The frequency of these waves is 3 Hz. The correct option is D.
What is a frequency?Frequency is the number of cycles or oscillations of a wave that occur in one second, measured in Hertz (Hz). It is a fundamental property of waves and is directly related to the energy and wavelength of the wave. The higher the frequency of a wave, the more energy it carries and the shorter its wavelength.
The formula for frequency (f) is:
f = 1 / T
where f is the frequency in Hertz (Hz) and T is the period of the wave in seconds (s). The period is the time it takes for one complete cycle or oscillation of the wave to occur.
Here in the Question,
The frequency of the waves can be calculated using the formula:
frequency = number of waves/time
In this case, the number of waves is 12 and the time is 4 seconds. Substituting these values into the formula, we get:
frequency = 12 waves / 4 seconds = 3 Hz
Therefore, the frequency of these waves is 3 Hz.
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A scientist told his student assistants that he had sorted groups of mice by their intelligence and asked the assistants to assess the groups’ maze-solving abilities. The scientist had not actually sorted the mice by intelligence. The students rated the “highest intelligence” group of mice as the best maze solvers and the “lowest intelligence” group as the worst maze solvers. What was the scientist trying to demonstrate by doing this experiment?
Experimental subjects should never be put into groups.
Mice should not be judged by their intelligence.
Higher intelligence mice are better maze solvers.
People can introduce their own biases into an experiment.
Answer: People can introduce their own biases into an experiment.
Explanation:
The scientist had not actually sorted the mice in terms of intelligence which means that the rats in all the groups possessed the same intelligence on average yet the students after assessment, still corroborated his false narrative by stating that the more intelligent mice were better at solving mazes.
This means that somehow, they must have altered the assessment to fit the narrative of the scientist and they might have done this either consciously or unconsciously. This therefore shows that people will usually introduce their own biases into an experiment in order for it to turn out a certain way.
Answer:
D
Explanation:
Edge 2020
If the distance between the magnets tripled what would happen to the force between the 2 magnets?
Answer:
Our Repelling Force Magnet Calculator shows the repelling force on a magnet that happens when another magnet of the same size is placed at some distance from it, with like poles facing one another. The force depends on the distance between the magnets. The farther apart the magnets are, the weaker the force.
Explanation:
Have All existing elements have been discovered
Answer:
Not not all of the elements have been discovered.
Light is created by the motion of charged particles.
O True
O False
Answer:
true
Explanation:
A cyclist applies the brakes on her bicycle with a force of -75.0 N. As a result,
the bicycle comes to rest after traveling 11.0 m with the brakes applied. How
much work is done by the brakes?
A. -75.0 N
B. 825 J
C. -825 J
D. 6.82 N.m

A clock draws 2.0 watts of power to operate and is in operation 8,600 hours per year. The energy usage of the clock, in kWh per year, is closest to
Answer:
the energy usage of the clock per year is 17.2 kWh
Explanation:
Given;
power drawn by the clock, P = 2 W
duration of the clock's operation, t = 8,600 hours per year
The energy usage of the clock per year is calculated as;
E = Pt
[tex]E = (\frac{2}{1000} )kW \ \times \ 8,600 \ hr\\\\E = 17.2 \ kWh[/tex]
Therefore, the energy usage of the clock per year is 17.2 kWh
A laser beam travels from a telescope on Earth to a Moon and then back to the Based on this information , how far is the Moon Earth? PLEASE HELP?
A. 384,000,000
B. 58.600, 000m;
C. 1, 536, 000, 000m
D. 117, 000, 000m
Jaką masę ma ciał umieszczone na wysokości 100m, jeśli jego energia potencjalna jest równa 1 kJ? Zapisz wzór i obliczenia z jednostkami
Answer:
Masę, m = 1,02 kilograma
Explanation:
Biorąc pod uwagę następujące dane;
Wysokość = 100 m
Energia potencjalna = 1 KJ = 1000 dżuli
Wiemy, że przyspieszenie ziemskie wynosi 9,8 m/s².
Znaleźć masę obiektu;
Energię potencjalną można zdefiniować jako energię posiadaną przez obiekt lub ciało ze względu na jego położenie.
Matematycznie energia potencjalna jest określona wzorem;
[tex] P.E = mgh [/tex]
Gdzie;
P.E reprezentuje energię potencjalną mierzoną w dżulach.
m reprezentuje masę obiektu.
g reprezentuje przyspieszenie ziemskie mierzone w metrach na sekundę kwadratową.
h oznacza wysokość mierzoną w metrach.
Podstawiając do wzoru, mamy;
1000 = m * 9,8 * 100
1000 = m * 980
Masę, m = 1000/980
Masę, m = 1,02 kilograma
