Answer:
Explanation:
Category 3 lasers might need goggles and can be up to 30 mW.
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Based on their location in the atmosphere, the layers are able to have their own special characteristics. For example, most weather
occurs in the troposphere. What occurs in each of the other layers? (Site 1)
99 % al 31-
BIUS X2 x?
N
Answer:
Explanation:
In the stratosphere the ozone layer absorbs and scatters the solar ultraviolet radiation. In the mesosphere meteors burn up. In the thermosphere aurora and satellites occur. In the ionosphere overlapping into the mesosphere and thermosphere occur.
Answer:
Thermospheric temperatures increase with altitude due to the absorption of highly energetic solar radiation. Radiation causes the atmosphere particles in this layer to become electrically charged, enabling radio waves to be refracted and thus be received beyond the horizon. This is how solar radiation can affect the thermosphere.
Explanation:
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A cow has eaten 1500KJ of stored chemical energy in the form of food. 945KJ is exerted as waste products. 495kJ is used for respiration. How much of the original 1500kJ is stored as chemical energy in the tissues of the cow?
We need Net Energy
\(\\ \rm\Rrightarrow E_{net}=1500-(945+495)\)
\(\\ \rm\Rrightarrow E_{net}=1500-1440\)
\(\\ \rm\Rrightarrow E_{net}=60kJ\)
Answer:
60
Explanation:
PLEASE HELP WILL NAME BRAINLIEST!! An object is dropped from rest. What is its instantaneous speed when it has been in motion for 4 s? The acceleration of gravity is 9.8 m/s^2 Answer in units of m/s.
Explanation:
Using kinematics,
t = 4s
u = 0m/s
a = 9.8m/s^2
Therefore v = u + at = 0 + (4)(9.8) = 39.2m/s.
a. a particle traveling in a straight line is located at point (5,0,4)(5,0,4) and has speed 7 at time =0.t=0. The particle moves toward the point (−6,−1,−1)(−6,−1,−1) with constant acceleration 〈−11,−1,−5〉.〈−11,−1,−5〉. Find position vector ⃗ ()r→(t) at time .
b. A baseball is thrown from the stands 40 ft above the field at an angle of 20∘20∘ up from the horizontal. When and how far away will the ball strike the ground if its initial speed is 26 ft/sec? (Assume ideal projectile motion, that is, that the baseball undergoes constant downward acceleration due to gravity but no other acceleration; assume also that acceleration due to gravity is -32 feet per second-squared.)
The ball will hit the ground after ? sec.
The ball will hit the ground a horizontal distance of ? ft away
The ball will hit the ground after approximately 1.88 seconds and at a horizontal distance of approximately 34.15 ft away.
a. To find the position vector of the particle at time t, we can use the kinematic equation for motion with constant acceleration. The position vector ⃗r(t) is given by ⃗r(t) = ⃗r₀ + ⃗v₀t + 0.5⃗at², where ⃗r₀ is the initial position vector, ⃗v₀ is the initial velocity vector, ⃗a is the acceleration vector, and t is the time.
Plugging in the values, we have ⃗r(t) = (5, 0, 4) + (0, 0, 7)t + 0.5(-11, -1, -5)t², which simplifies to ⃗r(t) = (5 - 11t^2, -t, 4 - 5t^2). This gives the position vector of the particle at any given time t.
b. For the baseball, we can analyze its motion using projectile motion equations. The vertical and horizontal motions are independent of each other, except for the initial velocity. The vertical motion is affected by gravity, with an acceleration of -32 ft/s².
Using the given initial speed of 26 ft/s and the launch angle of 20 degrees, we can decompose the initial velocity into its vertical and horizontal components. The vertical component is 26 * sin(20°) ft/s, and the horizontal component is 26 * cos(20°) ft/s.
To find the time of flight, we can use the equation for vertical motion: y = y₀ + v₀yt + 0.5at². The initial vertical position is 40 ft, the initial vertical velocity is 26 * sin(20°) ft/s, and the vertical acceleration is -32 ft/s². Solving for t, we get t ≈ 1.88 seconds.
To find the horizontal distance, we use the equation x = x₀ + v₀xt, where the initial horizontal position x₀ is 0 ft (assuming the ball is thrown from the stands), the initial horizontal velocity v₀x is 26 * cos(20°) ft/s, and the time of flight t is approximately 1.88 seconds. Solving for x, we find x ≈ 34.15 ft.
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a conducting sphere of radius 0.5 m has charge per area 3 mc/m2 distributed uniformly on its surface. there is no unbalanced charge on the sphere except on the surface. what is the total charge on the sphere?
The total charge on the sphere is determined by multiplying the charge per area by the surface area of the sphere.
The surface area of a sphere with a radius of 0.5m is 4πr², so the total charge on the sphere is 4π * 0.5² * 3mc/m², or 6mc.
In addition to the total charge, the electric field around a sphere with a uniform charge distribution can be calculated using Gauss's Law. Specifically, the electric field at a distance r from the center of the sphere is given by the equation E = σ/2εo, where εo is the permittivity of free space.
This equation states that the electric field is proportional to the charge per area and inversely proportional to the distance from the center of the sphere.
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acceleration: a car starts from 0 mph and accelerates to 70.0 mph in 6 seconds. what is the acceleration in m/h2 ?
The acceleration of the car, which starts from 0 mph and reaches 70.0 mph in 6 seconds, is approximately 355,019 m/\(h^{2}\)..
To calculate the acceleration, we need to convert the given speeds from mph to m/s and the time from seconds to hours.
First, let's convert the speeds.
0 mph is equivalent to 0 m/s, and 70.0 mph is approximately 31.29 m/s.
Next, let's convert the time.
6 seconds is equal to 0.00167 hours.
Now we can calculate the acceleration using the formula:
Acceleration = (Final Velocity - Initial Velocity) ÷ Time.
Substituting the values, we get:
Acceleration = (31.29 m/s - 0 m/s) ÷ 0.00167 hours.
To convert the answer to m/\(h^2.\), we need to multiply it by the conversion factor (3600 seconds/hour)\(^2.\)
Evaluating the expression and applying the conversion, we find:
Acceleration ≈ 355,019 m/\(h^{2}\).
Therefore, the acceleration of the car, in m/\(h^{2}\) units, is approximately 355,019 m/\(h^{2}\).
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What are proteins made of?
Vitamins
Sugars
Minerals
Amino acids
Answer:
amino acids
Explanation:
protins made of amino acids
hope ur help
Answer:
AMINO ACIDS
Explanation:
Protein consists of carbon, hydrogen, oxygen, and nitrogen. The addition of nitrogen gives protein its unique distinction from carbohydrate and fat, along with establishing the signature name, amino acid.
How many moles of HCl(g) must be added to 1.0 L of 2.0 M NaOH to achieve a pH of 0.00? (Neglect any volume changes.)
In order to achieve a pH of 0.00, we need to add enough HCl to neutralize all of the NaOH and create a solution with an excess of H+ ions.
The balanced chemical equation for the reaction between HCl and NaOH is as HCl + NaOH → NaCl + H2O.
This equation shows that one mole of HCl reacts with one mole of NaOH to produce one mole of NaCl and one mole of water.
Since the initial solution contains 2.0 moles of NaOH per liter, we need to add 2.0 moles of HCl per liter to neutralize all of the NaOH.
Therefore, we need to add a total of 2.0 moles of HCl to 1.0 liter of 2.0 M NaOH to achieve a pH of 0.00.
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1. A 5 kg block is pulled across a table by a horizontal force of 40 N with a frictional force of 8 N
opposing the motion. Calculate the acceleration of the object.
The acceleration of the block is 6.4 m/s².
To calculate the acceleration of the block, we need to consider the forces acting on it.
The applied force is 40 N, and since it is the only horizontal force in the direction of motion, it is the net force acting on the block.
The frictional force opposing the motion is 8 N.
The acceleration, we can use Newton's second law, which states that the net force acting on an object is equal to its mass multiplied by its acceleration (F = ma).
The net force is the difference between the applied force and the frictional force:
40 N - 8 N = 32 N.
Now, we can plug the values into Newton's second law:
32 N = 5 kg × a.
Solving for the acceleration (a), we get
a = 32 N / 5 kg
a = 6.4 m/s².
Therefore, the acceleration of the block is 6.4 m/s².
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a performer seated on a trapeze is swinging back and forth with a period of 8.85 s. if she stands up, thus raising the center of mass of the trapeze performer system by 35.0 cm, what will be the new period of the system?
The new time period of the system is 8.77 sec. If she stands up.
calculation
T = 2π√(L/g)
l = g*(8.85/2π)^2
new length = l -0.35= 8.85-0.35
T = 8.77 sec
Term (T) is the amount of time an oscillating body takes to repeat itself, and Frequency (f or ν) is the variety of instances it repeats in one 2d or unit time. in case you degree time in s (seconds) then frequency is measured in Hz (cycles or durations in keeping with second.
center of mass:
The centroid of a mass distribution in space is the unique point where the weighted relative positions of the distribution masses sum to zero. This is the point where force can be applied to produce linear acceleration without angular acceleration.
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Write a hypothesis about the effect of the red light on the population. Use the "if . . . then . . . because . . ." format, and be sure to answer the lesson question: "How does natural selection change the phenotypes within a population over time?"
.............they literally didn't talk about this in class.........
Answer:
yes because if red light was natural then it should cause more damage because that how it is
Answer:
its yes because if red light was natural then it should cause more damage because that how it is
4. The distance s travelled by a particle depends partly on the initial velocity u and time tand partly also on the acceleration a and tim e t. Establish a relationship between the four quantities.
Answer:
S = V0 t + 1/2 a t^2 standard equation
Where S is the distance traveled and V0 the initial speed
A kilowatt-hour is a unit of
1. force
2. power
3. work
4. voltage
5. current
6. None of these
7. torque
(I tried 2 and 6, but they were both wrong :( )
Answer:
option 4 is the correct answer
A 1400 kg car is traveling at a rate of speed of 32 m/s for 2 hours. For the remaining 3 hours of the trip the car travels at an average rate of speed of 38 m/s. What was the average change in momentum?
The average change in momentum for the car during the trip is 8400 kg·m/s.
What is Momentum?
Momentum is a vector quantity, meaning it has both magnitude and direction. The direction of momentum is the same as the direction of velocity, and its magnitude is proportional to both the mass and the velocity of the object.
Then, we calculate the final momentum of the car during the remaining 3 hours:
Final momentum during the remaining 3 hours = mass × final velocity during the remaining 3 hours = m × v2
Now, we can calculate the average change in momentum:
Average change in momentum = Final momentum - Initial momentum
= (Final momentum during the first 2 hours + Final momentum during the remaining 3 hours) - Initial momentum
= [(m × v2) + (m × v2)] - (m × v1)
= 2m × v2 - m × v1
Plugging in the given values:
Mass of the car (m) = 1400 kg
Initial velocity (v1) = 32 m/s
Final velocity during the first 2 hours (v2) = 38 m/s
Average change in momentum = 2m × v2 - m × v1
= 2 × 1400 kg × 38 m/s - 1400 kg × 32 m/s
= 53200 kg·m/s - 44800 kg·m/s
= 8400 kg·m/s
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What principle is responsible for light spreading as it passes through an?
Diffraction of light, as it is used to describe light, occurs more explicitly when a light wave passes by a corner or via an opening or slit that is physically smaller than the wavelength of that light, if not even smaller.
What principle causes light to travel through two tiny apertures and leave behind alternating bands of light and darkness?The intensity pattern that appears on the lit screen is determined by the superposition principle. When the difference in pathways from the two slits to a location on the screen equals an integral number of wavelengths (0,, 2,...), constructive interference takes place.
Which of the following characteristics of light spreads out light as it enters an object's opening?Light passing through an object causes a little bending known as diffraction. the perimeter of anything. The degree of bending is influenced by the wavelength of light's size in relation to the opening's size.
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What happens to the gravitational force between two objects when the distance between them is reduced by 50%?
A the gravitational force decreases by 50%
B the gravitational force increases by 50%
Cthe gravitational force decreases by 25%
the gravitational force increases by 400%
Question 8
Answer:
B
Explanation:
A baseball is hit by a batter with an initial velocity of 95 miles per hour at 45° above the horizontal. The opposing team misses the catch and the baseball lands in the outfield 50 meters from where it started. How long was the baseball in the air
Answer:
5.61 seconds
Explanation:
The baseball moves as a projectile. Its angle is 45° and its velocity is 95 miles per hour.
Let us convert this to metres per second:
1 mile per hour = 0.45 m/s
95 miles per hour = 95 * 0.45 = 42.75 m/s
We need to find the time of flight of the baseball. Time of flight is given as:
\(T = \frac{2u sin\alpha }{g}\)
where u = initial velocity
α = angle
g = acceleration due to gravity (9.8 m/s)
Therefore:
\(T = \frac{2 * 42.75 * sin40}{9.8}\\ \\T = 5.61 secs\)
The baseball was in the air for 5.61 seconds.
2. Two people, one on Earth and the other on the Moon, try and lift 200 kg blocks. Which person
will have to exert more force to lift their block or will they need to exert the same amount of
force? Explain your reasoning(4 pts)
Answer:
The person on Earth will have to exert more force to lift their block
Explanation:
The mass of the blocks to be lifted = 200 kg
The location of the first person = On Earth
The location of the second person = On the Moon
The force a person will have to exert to lift the block = The weight of the block = The gravitational force, F, on the block which is given as follows;
\(F = \dfrac{G \times M_1}{R^2} \times m_2\)
Where;
\(\dfrac{G \times M_1}{R^2}\)= The acceleration due to gravity on the Earth or the Moon, depending on the location of the block
m₂ = The mass of the block
Therefore, given that the acceleration due to gravity on the Earth is larger than the acceleration due to gravity on the Moon, the weight of the block on the Earth is larger than the weight of the block on the Moon, and the person on Earth have to exert more force to lift the heavier weight of the block on Earth than the person on the Moon will have to exert to lift the same block as the block has a lower weight on the Moon due to lower acceleration due to gravity on the Moon.
a bicycle wheel with mass 44.6 kg and radius 0.260 m has an axle through its center and can rotate without friction. assume that all the mass of the wheel is found in the rim. starting from rest, a constant force 30.5 n is applied tangentially at the rim of the disk (visualize a hand pushing the bicycle wheel to get it spinning, but imagine that the force is applied constantly as the wheel speeds up, causing it to accelerate its rotation).
The force of 30.5 N applied tangentially at the rim of the bicycle wheel with a mass of 44.6 kg and a radius of 0.260 m will result in an acceleration of approximately 0.687 m/s².
The torque, or turning force, applied to the bicycle wheel is equal to the force applied at the rim multiplied by the radius of the wheel, according to the equation τ = Fr, where τ is the torque, F is the force, and r is the radius. In this case, F = 30.5 N and r = 0.260 m.
The moment of inertia, which measures the resistance of the wheel to rotational motion, is given by the equation I = ½mr², where m is the mass of the wheel and r is the radius. In this case, m = 44.6 kg and r = 0.260 m.
Using the torque and moment of inertia, we can apply Newton's second law for rotational motion, which states that τ = Iα, where α is the angular acceleration. Substituting the values we have, we get Fr = ½mr²α.
Rearranging the equation to solve for α, we get α = (2Fr) / (mr²). Plugging in the given values for F, m, and r, we can calculate α as follows:
α = (2 * 30.5 N * 0.260 m) / (44.6 kg * (0.260 m)²)
α ≈ 0.687 m/s²
Therefore, the acceleration of the bicycle wheel's rotation due to the applied force is approximately 0.687 m/s².
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Which of the following shows the correct flow of urine when it is made?
Question 3 options:
Nephron > Minor & Major calyces > Renal Pyramid > Ureter > Renal Pelvis > Urethra > Bladder
Nephron > Minor & Major calyces > Renal Pelvis > Renal Pyramid > Ureter > Bladder > Urethra
Nephron > Renal Pyramid > Minor & Major calyces > Renal pelvis > Ureter > Bladder > Urethra
Nephron > Renal pelvis > Renal Pyramid > Minor & Major calyces > Urethra > Bladder > Ureter
The nephron is the functional unit of the kidney where urine is produced. The urine then flows through the renal pyramid and into the minor and major calyces.
which are cup-shaped structures that collect urine from the nephrons. From there, the urine travels to the renal pelvis, which is a central collecting point in the kidney, and then enters the ureter, a tube that connects the kidney to the bladder. The bladder is a muscular organ that stores urine until it is ready to be excreted through the urethra, a tube that carries urine out of the body. It's important to note that the flow of urine can be affected by certain medical conditions or disorders, such as kidney stones or urinary tract infections. The outer layer of the kidney in touch with the renal capsule is known as the renal cortex. The renal medulla has unique conical or triangular structures called renal pyramids, the base of which abuts the cortex and the tip of which emerges into the renal sinus. Renal columns are noticeably granular-textured strips of cortical tissue that divide adjacent renal pyramids and extend into the medulla. The pyramids, which are pyramidal in shape, are how the medulla is divided. The renal columns, which divide the pyramids, are actually cortical extensions. These are easily visible in a kidney that has been split in half coronally. A renal papilla, which points inward and opens into a small calyx, was present on each renal pyramid. The portion of a pyramid closest to the cortex is called the base.
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The Kelvin scale is also know as the absolute zero
TRUE OR FALSE
The Kelvin scale is also called absolute zero scale
Explanation:
true
consider this statement: Air is matter. Which facts best support the statement?
Balloons can be filled with air.
Air is essential for life to exist.
Air has mass.
Air is not an element.
To float on the air is to be happy.
Air can’t be seen.
Answer:
Balloons can be filled with air.
Air has mass.
Explanation:
Matter is anything that has mass and can occupy space.
Mass is the quantity of matter within a substance. Notably, there are three states of matter which are solid, liquid and gas.
So, air is a matter because it has mass and it can be used to fill balloons.
When air fills balloons , they take up the space in the balloon and this shows that they occupies space.Answer:
Balloons can be filled with air.
Air has mass.
please help me with this question: Tamika is babysitting and wants to make jello with the kids. She has to heat the water before adding the jello mix, If she heats the mixture to 50°C, how do the molecules move? Select ALL that apply.
A.
The hotter molecules move faster than the colder molecules.
B.
The hotter molecules move towards the surface of the mixture.
C.
The hotter molecules move towards the bottom of the mixture.
D.
The hotter molecules move slower than the colder molecules.
E.
The colder molecules move towards the surface of the mixture.
F.
The colder molecules move towards the bottom of the mixture.
Answer:
B f
Explanation: hop it helps
what can be used to describe electrical energy?
1.energy transferred through the movement of charges
2.kinetic energy of charged bodies in an electric field
3.potential energy stored in a battery
4.energy of light emitted by an electric bulb
energy transmitted by electric current
Electrical energy can be described as the energy transferred through the movement of charges, typically in the form of an electric current
define Electrical energy ?
Electrical energy is a form of energy that results from the movement of electric charges, typically in the form of an electric current. It is the energy that is transferred or converted from electric potential energy, which is the energy stored in a system due to the separation of charges. Electrical energy can be harnessed and used for various purposes, such as lighting, heating, powering electronic devices, and driving motors. It is an essential form of energy in modern society and plays a crucial role in many aspects of daily life.
The correct answer is 1. Electrical energy can be described as the energy transferred through the movement of charges, typically in the form of an electric current. Options 2, 3, and 4 refer to other forms of energy related to electricity but do not fully describe electrical energy itself.
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consider steady one-dimensional heat conduction through a cylindrical or spherical layer. what can you say about the rate of heat transfer through the layer
The rate of heat transfer through the layers of the cylinder will be constant.
There is no heat flow from the sides of the object. The cross-sectional area of a body in the direction of heat flow is constant. This is called one-dimensional heat flow because the temperature of a body is a function of only one dimension (distance from each side of the body). Heat transfer from the hot combustion gases includes forced convection through the hot gas boundary layer, conduction through the cylinder wall, and forced convection (including boiling) into the coolant liquid in head, engine block, and piston.
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If you double the area of a parallel plate capacitor and quadruple the distance between the plates,
what affect does this have on the capacitance?
The capacitance of the parallel plate capacitor is reduced to half.
A parallel plate capacitor is a device that has two parallel plates connected across a battery. The parallel plate capacitor charges the plates and creates an electric field between them.
The expression for capacitance of a parallel plate capacitor is given by,
C = εA/d
From the equation it is clear that the capacitance is directly proportional to the area of the plates and inversely proportional to the distance between the plates.
C'/C = 2A x d/(A x 4d)
C'/C = 1/2
Therefore, C' = C/2.
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A video surveillance camera is used to determine the speed of cars entering a tunnel. Assuming that the road is flat and that the lane markings are clearly visible, describe how the image position of a car can be used to estimate its position in the lane, and how this information can then be processed to give an estimate of the cars speed. State clearly any assumptions made.
By analyzing the change in a car's position on a video surveillance camera image between frames, its displacement can be estimated, allowing for the calculation of its position in the lane and speed, assuming clear lane markings and a constant distance from the camera.
The position of a car can be estimated in a lane with the help of a video surveillance camera. When a car moves from one frame of a video to the next, the change in the position of the car on the camera image is proportional to its actual displacement, which can be used to estimate its position in the lane. The image position of a car can be used to estimate its position in the lane with the following process:
When a car enters the field of view of the camera, its position on the camera image is identified. The position of the car in the next frame is then identified. The change in the position of the car in the image between the two frames is proportional to the car's actual displacement. The distance of the car from the lane marking can be estimated from the position of the car in the image. The center of the car is assumed to be at an equal distance from the two lane markings. The distance of the car from the camera can be assumed to be constant to get an estimate of the car's speed.
The process to calculate the speed of the car is given below:
Distance of the car from the lane marking is calculated.The displacement of the car in the image is determined.The distance between the car and the camera is assumed to be constant, and this distance is determined.The time difference between the two frames of the video is determined.The speed of the car is calculated by dividing the displacement by the time difference.The assumptions made in this estimation process are that the road is flat and that the lane markings are clearly visible.To know more about displacement, refer to the link below:
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what happens to the current across a circuit when the voltage is doubled while the resistance is held back
Since the current is inversely propotional to its resistance, when the voltage is doubled the current will be one-half
Find the average speed of a girl who walks 180 m down the street to the store in 90 s. (number and units only)
Answer: 2 m/s
Explanation:
average speed= totaled distance divided by total time
Answer:
average speed 2m/s
Explanation:
Which is true of diffraction?It does not occur for light.It does not occur for sound. It occurs best when the slit width is less than the wavelength of a wave.
Diffraction is the change in a wave's direction as it travels around barriers. Diffraction is observed in both light and sound waves. This means that options 1 and 2 are wrong.
For any opening or slit, waves with longer wavelengths bend more than waves with shorter wavelengths. If the wavelength is smaller than the opening, it would be difficult for diffraction to occur. Thus, the correct option is
It occurs best when the slit width is less than the wavelength of a wave.