Light travels at the same speed at all times. True False
Answers
Answer:
true hope this help :}
Explanation:
Related Questions
Which gloves are safe for working with electricity?
Answers
Nitrile Gloves gloves are safe for working with electricity.
What are Nitrile Gloves?A synthetic rubber made from acrylonitrile and butadiene, nitrile rubber is also referred to as nitrile butadiene rubber, NBR, Buna-N, and acrylonitrile butadiene rubber. Trade names like Perbunan, Nipol, Krynac, and Europrene are also used. Being resistant to chemicals, fuel, and oil makes this rubber special.
What is a nitrile glove used for?These gloves are therefore the best option for anyone who must handle potentially dangerous and caustic chemicals. Being incredibly puncture-resistant and removing the possibility of latex allergic reactions, they are also ideal for the majority of medical settings.
Is nitrile safe on skin?The robust barrier of protection provided by nitrile gloves can help keep the wearer safe from chemicals, acids, and oils. Latex-free: Nitrile gloves are excellent for anyone with sensitive skin or a latex allergy because they are latex-free, unlike natural rubber gloves.
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The plasma inside a plasma screen TV starts out as a mixture of gases. What gases are used?
Answers
Answer:
neon and xenon
Explanation:
The flat screen comprises two transparent glass panels sandwiching a thin layer of pixels. Each pixel is made up of three gas-filled cells. The gas is a mixture of neon and xenon. Each cell is painted on the inside with a phosphor that, when stimulated, will emit red, green, or blue visible light.
If an astronaut goes on a space walk outside the Space Station, she will quickly float away from the station unless she has a tether holding her to the station.
a. This statement is false. She and the Space Station have different orbits at the beginning but will stay together due to mutual gravity.
b. This statement is false. She and the Space Station share the same orbit and will stay together unless they are pushed apart.
c. This statement is true. She and the Space Station cannot share the same orbit and will move apart quickly.
d. This statement is true. She and the Space Station have different orbits at the beginning and will move apart.
Answers
A 1st class lever is used to lift a 350 N object placed 4 meters from the fulcrum. An effort force of 150 N is placed 15 meters from the fulcrum. Calculate: IMA, and Win, Wout.
Answers
In a first-class lever, the effort force and the load force act on opposite sides of the fulcrum, and the lever arm of each force is the perpendicular distance from the force to the fulcrum. The ideal mechanical advantage (IMA) of the lever is the ratio of the distance from the fulcrum to the effort force and the distance from the fulcrum to the load force.
IMA = distance from fulcrum to effort force / distance from fulcrum to load force
In this case, the distance from the fulcrum to the load force is 4 meters, and the distance from the fulcrum to the effort force is 15 meters. Therefore, the IMA of the lever is:
IMA = 15 m / 4 m = 3.75
The input work (Win) is the product of the effort force and the distance the effort force moves:
Win = effort force x distance moved by effort force
In this case, the effort force is 150 N, and it moves a distance of 15 meters. Therefore, the input work is:
Win = 150 N x 15 m = 2,250 J
The output work (Wout) is the product of the load force and the distance the load force moves:
Wout = load force x distance moved by load force
In this case, the load force is 350 N, and it moves a distance of 4 meters. Therefore, the output work is:
Wout = 350 N x 4 m = 1,400 J
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A 3. 0-kg mass moving in the positive x direction with a speed of 10 m/s collides with a 6. 0-kg mass initially at rest. After the collision, the speed of the 3. 0-kg mass is 8. 0 m/s, and its velocity vector makes an angle of 35° with the positive x axis. What is the magnitude of the velocity of the 6. 0-kg mass after the collision?
Answers
The magnitude of the velocity of the 6.0 kg mass after the collision is approximately 1.7 m/s.
We can solve this problem using conservation of momentum and conservation of kinetic energy. Conservation of momentum states that the total momentum of a system is conserved if there are no external forces acting on it. In this case, the system is the two masses.
Let p1 and p2 be the initial momenta of the 3.0 kg and 6.0 kg masses, respectively, and p1' and p2' be their final momenta after the collision. Since the 6.0 kg mass is initially at rest, we have:
p1 = m1v1 = (3.0 kg)(10 m/s) = 30 kg·m/s
p2 = m2v2 = (6.0 kg)(0 m/s) = 0 kg·m/s
After the collision, the 3.0 kg mass moves at an angle of 35° with a speed of 8.0 m/s. We can break its velocity into x- and y-components:
vx = v1' cos(35°) = 8.0 m/s cos(35°) ≈ 6.6 m/s
vy = v1' sin(35°) = 8.0 m/s sin(35°) ≈ 4.6 m/s
The total momentum of the system after the collision is:
p1' + p2' = m1v1' + m2v2'
We can use conservation of momentum to say that p1 + p2 = p1' + p2', so:
p1' + p2' = 30 kg·m/s
Substituting in the known values, we have:
(3.0 kg)(6.6 m/s) + (6.0 kg)v2' = 30 kg·m/s
Solving for v2', we get:
v2' = (30 kg·m/s - 19.8 kg·m/s) / 6.0 kg ≈ 1.7 m/s
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Sally , who has a mass of 68kg , is sledding at the park . She places her 6-kg sled at the top of a hill and then runs with a velocity of 3 m/s and jumps on it . What is the combined velocity of sally and the sled right after she jumps on in m/s? (Round your answer to one decimal place if necessary.)
Answers
Answer: 2.76 m/s.
Explanation:
68 kg × 3 m/s + 6 kg × 0 m/s = (68 kg + 6 kg) × vf
Simplifying the equation, we get:
204 kg·m/s = 74 kg × vf
Dividing both sides by 74 kg, we get:
vf = 204 kg·m/s ÷ 74 kg
vf ≈ 2.76 m/s
respiration is a process in which_________ is released from food
Answers
water and carbon dioxide
Lidia worries intensely that she will say or do the wrong thing around other people and they will think badly of her. So she prefers to be by herself and avoids being around a lot of people. What MIGHT be Lidia suffering from
Answers
Lidia's intense worry, fear of negative judgment, and avoidance of social situations suggest that she might be experiencing social anxiety disorder.
Lidia's intense worry about saying or doing the wrong thing around other people and the fear of being negatively judged by them, leading to her preference for being alone and avoiding social situations, are indicative of social anxiety disorder (SAD), also known as social phobia.
Social anxiety disorder is a common mental health condition characterized by excessive fear and anxiety in social situations. Individuals with SAD often have a persistent fear of being embarrassed, humiliated, or judged by others. This fear can be specific to certain situations, such as public speaking or socializing, or it can be more generalized, affecting various social interactions.
Lidia's avoidance of social situations is a common coping mechanism employed by individuals with social anxiety. They may try to minimize their exposure to situations that trigger their anxiety in an attempt to avoid potential embarrassment or negative evaluation.
It is important to note that a formal diagnosis can only be made by a qualified mental health professional after a thorough evaluation. However, based on the provided information, Lidia's symptoms align with the characteristics of social anxiety disorder.
Lidia's intense worry, fear of negative judgment, and avoidance of social situations suggest that she might be experiencing social anxiety disorder. Seeking professional help from a mental health provider can provide a proper diagnosis and guidance on effective treatments, such as therapy and, in some cases, medication, to help Lidia manage and overcome her social anxiety.
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Pls help this is due today.
Beyonce weighs 500 N and is sitting at one end of a see-saw which is 4 m long and balanced in the middle. Jordan is 2000 N. Where should she sit in order to balance the see-saw?
Answers
Answer:
11 moments docx has the answer
Explanation:
If 5 complete oscillations of a sound wave pass through a point in 0.5 s and the speed of sound was recorded to be 10 m/s, then find the wavelength of the sound.
Answers
Answer:
Wavelength = 1 meters
Explanation:
Given that,
Number of oscillations is 5
It passes through a point in 0.5 s
The speed of sound was recorded to be 10 m/s.
We need to find the wavelength of the sound.
Firstly, we will find frequency of this wave. Total no of oscillations per unit time is called frequency. So,
\(f=\dfrac{5}{0.5}\\\\f=10\ Hz\)
Now the speed of wave in terms of wavelength and frequency is given by :
\(v=f\lambda\)
Here, \(\lambda\) = wavelength
\(\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{10\ m/s}{10\ Hz}\\\\\lambda=1\ m\)
So, the wavelength of the sound is 1 meters.
Kristen's calculations involving lobsters found that the averagelobster, when placed on the ground, was able to cover 20 centimeters in 5 seconds, what was the average speed of the lobster?
Answers
Good luck
Answer:
4 cm/s
Explanation:
Speed = distance over time
The twisting joint (type T) of an industrial robot has a range of 322° rotation. In order to study the mechanical errors in the joint and the input/output links, a statistical experiment was conducted by taking 10 samples, each one as follows: the joint was commanded to turn and stop at a certain addressable angle and the deviation (in degrees) from that specific angle was recorded. The results of taking 10 samples are presented in the table below: 0.176 0.04 -0.345 0.079 0.309 -0.004 -0.102 0.12 0.075 0.1 Supposing that the statistical distribution of the mechanical errors is normal, determine the number of storage bits required in the controller memory so that the accuracy of the joint is as close as possible to, but less than, its repeatability. Use six standard deviations as the measure of repeatability.
Answers
To determine the number of storage bits required in the controller memory for the twisting joint (type T) of the industrial robot, we need to calculate the repeatability, round the deviations to a reasonable precision, and then calculate the number of addressable positions based on the range of the joint and the chosen accuracy level.
First, let's calculate the repeatability of the joint. Given that the range of rotation is 322°, the repeatability can be calculated as 6 times the standard deviation. Since the standard deviation is a measure of how spread out the data is, multiplying it by 6 ensures that the accuracy of the joint is as close as possible to, but less than, its repeatability.
Next, let's analyze the given data. The 10 samples of deviations from the commanded angles are: 0.176, 0.04, -0.345, 0.079, 0.309, -0.004, -0.102, 0.12, 0.075, and 0.1.
To calculate the standard deviation of these deviations, we need to find the mean and then calculate the differences from the mean. Squaring these differences and taking the average will give us the variance, which we can then take the square root of to obtain the standard deviation.
After calculating the standard deviation, we multiply it by 6 to obtain the repeatability.
Now, to determine the number of storage bits required, we need to consider the accuracy of the joint. The accuracy depends on the precision required for representing the deviations. Assuming a reasonable level of precision, we can round the deviations to, for example, 3 decimal places.
Finally, the number of storage bits required in the controller memory can be calculated by multiplying the range of the joint (322°) by the accuracy (e.g., 0.001°, considering 3 decimal places). This will give us the number of addressable positions, which can be represented by the required number of storage bits.
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will mark as brainlest pls help
Answers
Answer:
Explanation:
one and three seem right soo answer C
Plz help plllzzzzzzzz
Answers
The graph below shows the straight line motion of four cars.
Which car is moving with the greatest velocity?
Answer
A
Car A
B
Car B
C
Car C
D
Car D
Answers
Answer:A Car A
Explanation:
Question 23 of 25 Which statement describes a question that can guide the design of a scientific investigation? A. It asks about a cause-and-effect relationship between two variables. B. It asks about how the observations will be organized. C. It asks about whether a controlled variable is necessary. OD. It asks about the preferred outcome of the investigation.
Answers
Scientific investigation asks about a cause-and-effect relationship between two variables. Thus, the correct answer is (a).
Scientific investigation is intended to create a hypothesis and demonstrate its validity or lack thereof. Experiments must be conducted in order to test these hypotheses, and these experiments are planned in accordance with the discovery of a cause-and-effect relationship between the two variables under scientific investigation. In these experiments, the "cause" is variable upto various degrees, and the "effect" of the variance is noted. The experimental design, which will try to manipulate the causes to see how these manipulations impact the second variable, will thus be guided by knowledge of the cause-and-effect connection.
Observations are frequently the first step in a scientific investigation.
An observation is something that is discovered using the senses of humans or tools and measurement technologies that support the senses of humans. Important scientific discoveries may result from unintentional observations.
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Why do some photons travel right through the atom unchanged while others are absorbed?A) Only photons of specific frequencies can promote an electronic transition.B) Only visible light photons can interact with electrons.C) Only a few photons get deflected by the nucleus since it's only a tiny part of the atom's volume.D) Only negatively charged photons interact with atoms.
Answers
We are aware that electromagnetic radiation is governed by Maxwell's equations in electromagnetism. The EM wave equation can be derived from Maxwell's equations. 2Ex2 = 1c2Et2, and 2Et2 = 2Ex2.
Describe electromagnetic.
electromagnetic is defined as being of, relating to, or created by electromagnetism. Examples include a magnetic field due to electric current and electromagnetic.
The electromagnetic force is what?
The research of the electrostatic field is a component of the science of electromagnetism. It is a sort of particle-particle interaction that involves electrical charges The electromagnetic force, which combines magnetic and electrical forces, acts between charged particles.
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a box of mass m is being accelerated up a vertical wal by a constant force f applied at an angle
Answers
Consider a force of magnitude F pulling an object over a surface. The object is moving horizontally, with an angle of between the force and motion direction.
The length of the line AB makes up the force's component in the direction of motion.
What effects does angle have on force?
The component of force perpendicular to the incline reduces as the angle increases, while the component of force parallel to the incline grows. The weight vector's parallel component is what drives the acceleration. As a result, accelerations increase with increasing incline angles.
If we measure the acceleration and the driving force, we can use the formula F = ma to compute the mass of an item moving uniformly in a circle.
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which one of the following is not an electromagnetic wave? which one of the following is not an electromagnetic wave? infrared radio waves ultraviolet gamma rays sound waves
Answers
Answer:
sound waves
Explanation:
sound waves are mechanical waves that need a medium like air to propagate throuh
What is the kinetic energy of a 1400 kg sports car Travelling down the road with a speed of 30 m s?
Answers
The kinetic energy of the sports car is 630 KJ.
The kinetic energy is the energy possessed by the system by virtue of its motion.
Also kinetic energy is equal to the net work done on the object.KE = ΔW
The SI unit of the kinetic energy is joule (J).The formula to calculate the kinetic energy is KE = (1/2)*m*v²Where,
m = mass of the object
v = speed at which the object is moving
Kinetic energy depends on the speed squared of the object. This means that when an object's speed is doubled, its kinetic energy is quadrupled.Mass of the car = 1400 Kg
Velocity of the car = 30 m/sec
KE = (1/2)*1400*(30)²
KE = (1/2)*1400*900
KE = 630000 J
KE = 630 KJ
The kinetic energy of a 1400 kg sports car travelling down the road with a speed of 30 m/s 630 KJ.
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How can you separate chalk from
chalky water?
Answers
Answer:
Yes
Explanation:
Because the call can evaporate from the water.
Answer:
A centrifuge is utilized to isolated little sums of strong held in suspension from the fluid. For case, chalk from water. The centrifuge contains test-tubes that are spun around at tall speed that causes the strong to sink to the foot of the tube. The fluid is the tapped (poured off) clearing out the strong behind.
which of the following is not an explanation for the cause of seasons in Michigan
Answers
Answer:
I need your answer choices to answer this man, you didn't give any.
Explanation:
One scientist suggests that out of the different possible locations, they should design the model and build it at the equator recieves the most intense solar radiation. Which if the following is the most appropriate critique for the scientist's suggestion?
A. Earth's equator is not hot enough to simulate the Martian daytime.
B. The high mountain top gets the same amount of radiation as the equator, but with atmospheric conditions that are more similar to Mars.
C. The equator has deserts that are actually too dry compared to Mars.
D. The Antarctica has the same nighttime temperature as Mars, but with a similar amount of ice compared to the equator.
Answers
Answer:
B.
I think.
Explanation:
Mars doesn't have that much of an atmosphere!
Have a great day!
At a given temperature, 3.00 m of carbon dioxide has a mass of 5.94 kg. What is the density of carbon dioxide at this temperature
Answers
Answer:
1.98 kg/m
Explanation:
5.94 divided by 3.00
A cheetah can start from rest (0 m/s) and reach a top speed of 30 m/s (70 mph) in just 3.4 seconds. What
was the cheetah's acceleration during this trip?
Answers
Answer:
72 mph
Explanation:
In a circuit, three wires from a junction. the currents in two of the wires are 5 a and 12 a. the current in the other wire is?
Answers
In a circuit, three wires form a junction. The current in one of the wires is either 7A or 17A, which is either the sum of the currents in the two-wire or the difference of current between two wires.
Electric current is the movement of charged particles (electrons or ions) through a current-carrying conductor, under the effect of potential difference induced between the ends of the conductor. It's measured in Ampere(A), which is the SI unit for current. Current in a circuit is measured using a device referred to as an ammeter.
When several conductors or semiconductors come into physical touch, the result is an electrical junction. Thermoelectricity junctions, metal-semiconductor junctions, and p-n junctions are a few different forms of electrical junctions.
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Pure water has a density of 1000 kg/m³. Explain what will
happen to a block of material with a density of 1020 kg/m³
when placed into:
sea water
pure water.
Answers
The block of material with a density of 1020 kg/m³ when placed into pure water will sink.
What is the density of an object?The Density of an object is the ratio of the mass and volume of the object.
density = mass/ volumeThe density of an object measure how compact the particles of an object are.
Dense objects have particles that are tightly packed together whereas less dense objects have particles that are less tightly packed together.
A denser solid will sink in a less dense liquid.
A less dense solid will float in a denser liquid,
Comparing the densities of the solid object and the density of water.
The block of material has a greater density than water. Hence, the block of material will sink in water.
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the mass of a raindrop is 4 milligrams. which one of the following statements indicates the correct mass of the raindrop in grams?
The rain has a mass of 4 times 10^6 grams, drop The raindrop has a mass of 4 times 10^3 grams. The raindrop has a mass of 4 times 10^-3 grams. The raindrop has a mass of 4 times 10^-6 grams. The raindrop has a mass of 4 times 10^-1 grams.
Answers
The correct statement that indicates the correct mass of the raindrop in grams has a mass of 4 x 10⁻³ grams.
Which statements indicates the correct mass of the raindrop in grams?
The raindrop has a mass of 4 x 10⁻³ grams is the correct statement that indicates the correct mass of the raindrop in grams.
Mass is the measure of the amount of matter in an object. The metric unit of mass is the gram (g).
The mass of a raindrop is 4 milligrams.1 milligram is 0.001 grams. Therefore,4 milligrams = 4 x 0.001 grams = 0.004 grams.
Using scientific notation, 0.004 grams can be written as 4 × 10⁻³ grams.
Thus, the correct statement that indicates the correct mass of the raindrop in grams is: The raindrop has a mass of 4 x 10⁻³ grams.
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This force is a pull between all objects. It is the force that gives us weight here on Earth. And, if we throw a rock off of a cliff, it is the force that causes the rock to fall to Earth. What is this force?
Answers
Answer:
Gravity.
Explanation:
Gravity is considered to be a universal force of attraction which acts between all objects that has both mass, energy and occupy space. Therefore, it acts in such a way as to bring objects together.
Additionally, the gravity of earth makes it possible for all physical objects to possess weight.
This ultimately implies that, this force is a pull between all objects. It is the force that gives us weight here on Earth. And, if we throw a rock off of a cliff, it is the force that causes the rock to fall to Earth.
(15 points) a 4000-w electric resistance heater is heating water in an insulated, constant diameter tube. if the water enters the heater steadily at 315 k and leaves at 360 k, determine the mass flow rate of water in kg/s.
Answers
The mass flow rate of water is 0.087 Kg/s.
Contact tube diameter means no pressure head drop.
P=C heating done at P=C.
MC(T₁ - T₂) = Q = W
M × 1.015 (360-315) = 4000
M = 4000 / 1.015 × \(10^{3}\) × 45
M = 0.087 Kg/s
Pressure is defined due to the fact the pressure of all the gasoline particle/wall collisions divided thru the vicinity of the wall: All gases exert strain ; it's far one of the important measurable portions of this phase of depend.
From the weather to air tour, strain performs a dramatic position in our lives. It plays especially vital roles at some point of chemical reactions. through manipulating stress, chemists can pressure chemical reactions to occur and the transitions among solids, beverages, and gases to boost up.
The primary unit of pressure is the pascal, described because the stress exerted with the useful resource of a pressure of one newton perpendicularly upon a place of one square meter.
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