As a roller coaster car crosses the top of a 60-m-diameter loop-the-loop, its apparent weight is the same as its true weight. The car's speed at the top will be 24.25 m/s
Any object moving in a circle (or along a circular path) experiences a centripetal force. That is, there is some physical force pushing or pulling the object towards the center of the circle. This is the centripetal force requirement.
diameter = 60 m
weight + normal = m\(v^{2}\)/r
m = mass
v = velocity
r= radius
since , apparent weight is the same as its true weight
2W = m\(v^{2}\)/r
2 * m * g = m\(v^{2}\)/r
v = \(\sqrt{2gr}\)
v = \(\sqrt{2 * 9.8 * 30}\) = 24.25 m/s
The car's speed at the top will be 24.25 m/s
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A grasshopper jumps at a 58.0 degree angle, and lands 3.28m away. What was its initial velocity ?
The range of a projectile as obtained from the calculation is 5.98 m/s.
What is the range?The range is the distance that is covered by a projectile. The range of a projectile is given by the formula; R = u^2 sin 2θ/g
Where;
u = initial velocity
θ = angle turned
g = acceleration due to gravity
Now;
3.28 = u^2 sin 2(58)/9.8
u^2 = 3.28 * 9.8/ sin 2(58)
u = √3.28 * 9.8/ sin 2(58)
u =√32.144 /0.899
u = 5.98 m/s
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The angular resolution of a radio wave telescope decreases with
decrease disc size. true or false
The angular resolution of a radio wave telescope decreases with decreased disc size which is false.
The angular resolution of a radio wave telescope actually increases with a decrease in dish size. Angular resolution refers to the ability of a telescope to distinguish between two closely spaced objects in the sky. It is determined by the size of the telescope's aperture or dish.
In general, the larger the aperture or dish size of a telescope, the better its angular resolution. A larger dish collects more incoming radio waves, allowing for finer details to be resolved. Smaller dishes, on the other hand, have limited collecting area and, therefore, lower angular resolution. This is why larger radio telescopes are often preferred for high-resolution observations.
So, to achieve better angular resolution, one would typically need a larger dish size for a radio wave telescope.
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An infant born with a genetic defect that causes little or no brown fat to be formed will have _____.(a) difficulty absorbing nutrients from the intestine(b) difficulty regulating his body temperature(c) very stretchy tendons(d) a reduced bone mass(e) difficulty breathing.
an infant born with a genetic defect that causes little or no brown fat to be formed will have (b) difficulty regulating his body temperature.
Brown fat is a specialized type of fat that generates heat to help regulate body temperature in newborns and infants. If an infant is born with a genetic defect that causes little or no brown fat to be formed, they will have difficulty regulating their body temperature. This can result in hypothermia or hyperthermia, depending on the environment. The other options listed in the question (difficulty absorbing nutrients from the intestine, very stretchy tendons, reduced bone mass, and difficulty breathing) are not directly related to the function of brown fat.
Brown fat, also known as brown adipose tissue, plays a crucial role in generating heat and maintaining body temperature, especially in infants. Without sufficient brown fat, the infant will struggle to regulate their body temperature, leading to the mentioned issue.
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You wad up a piece of paper and throw it into the wastebasket. How far will your piece of paper travel if you throw it with a velocity of 3.1 m/s at an angle of 32A box of mass 14 kg sits on an inclined surface with an angle of 52 degrees. What is the component of the weight of the box along the surface
Since the paper is wadded up tight, and if there's any air resistance left we assume there isn't any, it might just as well be a stone that's tossed. This is just a stripped down projectile situation.
Is taking off an aircraft example of projectile?
When an aircraft takes off, it does not take off in a parabolic direction. As a result, it isn't a projectile motion.
What are the projectile motion equations?The equation for the distance traveled by a projectile being affected by gravity is sin(2θ)v2/g, where θ is the angle, v is the initial velocity and g is acceleration due to gravity.
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https://brainly.com/question/14493923#SPJ4How do space probes help in navigation and or space exploration?
Space probes are unmanned spacecraft that are designed to explore the solar system and beyond. They are equipped with advanced technologies and scientific instruments that help in navigation and space exploration. Here are some ways that space probes are useful:
Mapping and Navigation: Space probes help to map and navigate the solar system. They collect data on the location, size, and movement of planets, moons, asteroids, and other celestial bodies. This information is used to help spacecraft navigate and avoid obstacles during missions.
Studying Planets and Moons: Space probes can land on and study planets and moons in the solar system. They collect data on the composition, temperature, and atmosphere of these bodies. This information is used to learn about the origins and evolution of the solar system.
Searching for Signs of Life: Space probes are used to search for signs of life on other planets and moons. They look for evidence of water, organic compounds, and other indicators that life may exist or have existed in the past.
Collecting Samples: Some space probes are designed to collect samples of rocks, soil, and other materials from other planets and moons. These samples can be studied to learn more about the composition and history of the solar system.
Communication: Space probes are equipped with antennas that allow them to communicate with Earth. They send back data and images that are used by scientists to learn more about the solar system.
Overall, space probes are important tools for navigation and space exploration. They help us learn more about the solar system and the universe beyond.
3. why is it important that the pink disk remain in the indicator bracket the entire time the apparatus is spinning? what is the physics behind this?
It is important that the pink disk remains in the indicator bracket the entire time the apparatus is spinning because it serves as a reference point for the angular position of the spinning apparatus.
This allows for accurate measurements and calculations to be made regarding the rotational motion of the apparatus.
The physics behind this is related to the concept of angular velocity, which is the rate of change of angular position with respect to time.
By having the pink disk in the indicator bracket, the angular position of the apparatus can be accurately measured and the angular velocity can be calculated. This is important for understanding the dynamics of the spinning apparatus and for making accurate predictions about its behavior.
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What is the basis for the sounds referred to as korotkoff sounds?.
Answer:Korotkoff Sounds. -tapping sounds created by turbulent blood flow in arm. -pressure is slowly being released from cuff, so systolic pressure is above that of the cuff, but diastolic is still below, so the artery opens in systole and collapses in diastole.
Explanation:
How much net force is required make a 10 kg box accelerate at a rate of 5 m/s2?
O2N
0 50 N
0 15 N
0 100 N
what means 10² what we call this
we call it as well as 100 . so easey
Answer:
10 squared
Explanation:
10 squared
In Depth:
Let have a square that has a side length of 10.
A square four sides are equal and if we find the area of a squared, our formula is
\( {s}^{2} \)
Our in this instance,
\( {10}^{2} \)
or we call it
\(10 \: \: squared\)
In if we are trying to calculate how much work is done, what do we measure
To calculate work, we need to know both the magnitude of the force applied and the distance over which it is applied. The formula for work is W = F × d × cosθ.
How to calculate how much work is done?We measure both the force acting on an object and the distance through which the force acts, known as displacement.
Work is defined as the product of force and displacement in the direction of the force. Therefore, to calculate work, we need to know both the magnitude of the force applied and the distance over which it is applied.
The formula for work is W = F × d × cosθ, where W is the work done, F is the force applied, d is the displacement, and θ is the angle between the force and displacement vectors.
The unit of work is joule (J), which is equivalent to the product of newton (N) and meter (m).
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which list includes translucent objects only
Objects that let in light and blurry images are translucent.
Translucent is a term that refers to an adjective. This characteristic is the property of an object to allow the passage of light, without allowing visibility with high clarity through it.
This term is often confused with transparency. However, they differ because a transparent object lets light through easily and allows you to see clearly through it.
According to the above, objects that allow light to pass through but do not allow clear vision are translucent.
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La masa de un camión es de
45.000.000 gr, expresar las unidades
en Kilogramos y Toneladas.
Answer:
45000 kg and 45 tons
Explanation:
The expression in kilograms and tons is shown below;
As we know that
1 gr is 0.001 kg
So, 45000000 = 45,000 kg
And,
1 kg = 0.001 tons
So, 45000 kg = 45 tons
Therefore the same would be considered
When the two surfaces of a thin film are parallel and the light is incident at some angle what fringes are formed? A. Circular B. Elliptical C. Parabolic D. Straight and why?
Answer:
The correct option is;
A. Circular
Explanation:
Some of the light that impinges on the surface are reflected and the rest are transmitted to a different medium
At the surface of the next medium also, some of the light are transmitted while the others are reflected and refracted through the first medium
The speed of light (and hence the wavelength and color) refracted through the thin film is changed as the distance the refracted light travels through the thin film is increased as we move away from the point directly in the front view to some distance as the reflected light path from those distance to the eye is increased due to their inclination giving them a different wavelength which are all equal at a radial distance from the eye hence forming a circular fringes.
A car accelerates from rest to a speed of v. Later, on a highway it accelerates from v to 2v. Which takes more energy, going from 0 to v, or from v to 2v?
Answer:
I believe 0 to V sorry if im wrong
Explanation:
the condition in which certain colors are diminished as depth increases is called:
The condition in which certain colors are diminished as depth increases is called color attenuation. This refers to a phenomenon where colors become less vibrant and fade as the distance between the observer and the object increases.
This happens due to the scattering of light by particles in the atmosphere, which reduces the intensity of the light and alters the color perception of the viewer.
As a result, the colors of objects that are far away appear less vivid and washed out, while those that are closer look brighter and more saturated. This effect is particularly noticeable in outdoor scenes where the distance between objects is significant.
The degree of color attenuation depends on the distance between the viewer and the object, the angle of incidence of the light, the quality of the atmosphere, and the presence of any obstructions that might block or reflect light.
Color attenuation is a common phenomenon in outdoor photography and can be used to create depth and dimension in images. Photographers often use color correction techniques to compensate for the loss of color and contrast that occurs when shooting at a distance.
In conclusion, color attenuation is the condition in which certain colors are diminished as depth increases. It is caused by the scattering of light by particles in the atmosphere, which reduces the intensity of light and alters the color perception of the viewer. This phenomenon is particularly noticeable in outdoor scenes and is commonly observed in photography.
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plz help me yesterdays answer was wrong....
Name the Thermal expansion of fluids such as liquid and gas
Answer:
water
mercury in thermometer
volume gas thermometer
jar lids
power lines
which one of the four mentioned is not a plate boundary? select one: a. transform b. insurgent c. convergent d. divergent
One of the four mentioned is not a plate boundary is b. insurgent.
Plate tectonics is the theory that explains the movement of Earth's lithosphere, which is composed of large plates that glide over the mantle. The plates are separated by three types of plate boundaries: divergent, convergent, and transform. Transform boundary is where two plates slide past one another in opposite directions, either horizontally or diagonally. The San Andreas Fault is a well-known example of a transform boundary. Divergent boundaries are where two plates pull away from each other and new crust is created.
The Mid-Atlantic Ridge is an example of a divergent boundary and convergent boundary is where two plates move towards each other and one plate gets consumed or goes under the other. The Himalayas were created as a result of the collision of two convergent plates, the term insurgent is not used in plate tectonics. The correct term that describes the three main types of plate boundaries is not insurgent but instead transform, divergent, and convergent boundaries. So the correct answer is b. insurgent.
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How many days does the earth take to rotate around the sun
Answer:
1 day
Explanation:
The spinning movement of Earth around its axis is known as Earth's rotation.
The Earth rotates around the Sun in 1 day that is 24 hours but once in every 23 hours, 56 minutes, and 4 seconds with respect to other stars.
According to the Indian astronomer Aryabhata, Earth rotates about its axis daily.
what is the definition of sewer?
Answer:
an underground conduit for carrying off drainage water and waste matter
Explanation:
Answer:
an underground conduit for carrying off drainage water and waste matter.
Explanation:
releasing the accelerator to decrease your speed smoothly also reduces wear and tear on the brakes, thus reducing maintenance costs.
Yes, releasing the accelerator to decrease your speed smoothly is indeed a good driving practice that can help reduce wear and tear on the brakes. When you release the accelerator, the vehicle naturally slows down due to engine braking and air resistance, which puts less strain on the brakes.
By utilizing this technique, you can rely more on the natural deceleration of the vehicle rather than solely relying on the brakes to slow down. This helps in reducing the amount of heat generated in the braking system, which in turn decreases wear on brake pads, rotors, and other components.
Reducing wear and tear on the brakes can result in longer brake life and lower maintenance costs since you won't need to replace brake components as frequently. Additionally, it can also contribute to improved fuel efficiency, as you're effectively using less fuel to slow down the vehicle.
It's important to note that while releasing the accelerator to decrease speed smoothly is beneficial, it's also essential to use the brakes when necessary, such as during emergency stops or when additional braking power is required. Balancing both techniques can help optimize vehicle control, safety, and maintenance.
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Q3. A plane has reached cruising altitude at 36,000ft. What is the density of O
2
at that height, relative to sea-level? Assume that temperatures do not differ with increased altitude. (3 points)
The density of O2 at cruising altitude, relative to sea-level, is approximately 0.379 times the density at sea-level.
The density of O2 at cruising altitude of 36,000ft, relative to sea-level, can be calculated using the relationship between pressure and altitude. At higher altitudes, the pressure decreases, which affects the density of gases.
To find the density of O2 at cruising altitude, we can compare the pressure at that height to the pressure at sea-level. The pressure decreases with altitude, so we need to determine the ratio of the pressures.
Assuming the temperature does not differ with increased altitude, we can use the ideal gas law equation:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.
At sea-level, the pressure is around 1 atmosphere (atm). At cruising altitude, the pressure is lower. The relationship between pressure and altitude can be approximated using the barometric formula:
\(P = P0\cdot e^(-h/H)\)
where P0 is the pressure at sea-level, e is the base of the natural logarithm, h is the altitude, and H is the scale height.
In this case, we can substitute the given values: P0 = 1 atm, h = 36,000ft, and H = 8,400ft (approximately).
Using the barometric formula, we can calculate the pressure at cruising altitude:
\(P = 1 atm \cdot e^(-36,000ft/8,400ft)\)
P ≈ 0.379 atm
Now, to find the density of O2 at cruising altitude relative to sea-level, we can use the ideal gas law. The number of moles remains constant, so we can compare the densities using the ratio of the pressures:
Density at cruising altitude / Density at sea-level = Pressure at cruising altitude / Pressure at sea-level
Density at cruising altitude / Density at sea-level = 0.379 atm / 1 atm
Density at cruising altitude / Density at sea-level ≈ 0.379
Therefore, the density of O2 at cruising altitude, relative to sea-level, is approximately 0.379 times the density at sea-level.
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a sonar system can use sound waves wih a frequency of 120kHz or 200kHz. A. what is the wavelength of each of these waves when they are sent through sea water?
B. What are their wavelengths in freshwater?
C. The ship operating these sonar systems is in sea water with a depth of 3km.
How long will it take an echo to return to the ship after a ‘ping’
(A) The wavelength of each of these waves when they are sent through sea water is 0.0126 m and 0.0076 m respectively.
(B) The wavelength of each of these waves when they are sent through freshwater is 0.012 m and 0.0074 m respectively.
(C) The time taken for the echo to return to the ship is 3.97 seconds.
What is the wavelength of the sound wave in sea water?
The wavelength of the sound wave in sea water depends on the speed of sound in seawater and frequency of the wave.
The speed of sound in seawater, v = 1,510 m/s
λ = v/f
when the frequency, f = 120 kHz
λ = 1510 / 120,000
λ = 0.0126 m
when the frequency, f = 200 kHz
λ = 1510 / 200,000
λ = 0.0076 m
The speed of sound in freshwater, v = 1481 m/s
when the frequency, f = 120 kHz
λ = 1481 / 120,000
λ = 0.012 m
when the frequency, f = 200 kHz
λ = 1481 / 200,000
λ = 0.0074 m
The time taken for the echo to return is calculated as follows
v = 2d/t
t = 2d/v
t = (2 x 3,000 m) / (1510 m/s)
t = 3.97 s
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What is the kinetic energy of a car with a mass of 1781 kg if it's traveling at 19.33 m/s? Submit your answer in exponential form.
332734.34 Joules
Explanation
Kinetic energy is a form of energy that an object or a particle has by reason of its motion and mass, it is represented by the expression
\(\begin{gathered} E_k=\frac{1}{2}mv^2 \\ where\text{ m is the mass} \\ v\text{ is the velocity} \\ the\text{ unit for kinetik energy is Joules} \\ 1\text{ Joule} \\ 1\text{ Joule=kg}\frac{m^2}{s^2} \end{gathered}\)then
Step 1
a) Let
\(\begin{gathered} mass=\text{ 1781 Kg} \\ v=19.33\frac{m}{s} \end{gathered}\)b) now,replace in the formula:
\(\begin{gathered} E_{k}=\frac{1}{2}mv^{2} \\ E_k=\frac{1}{2}(1781kg)(19.33\frac{m}{s})^2 \\ E_k=332734.34\text{ Joules} \end{gathered}\)therefore, the answer is 332734.34 Joules
I hope this helps you
constriction is made in a clinical thermometer why
subject :science (energy)
Answer:
The constriction in the thermometer is to prevent the mercury from dropping back to the bulb when the reading is being taken. It is easier for us to take reading. It prevents the thermometric substance (Mercury or Alcohol) from running back into the bulb.
Explanation:
Hope it is helpful....
Answer:
constriction is made in a clinical thermometer because it prevents the thermometric liquid from running back into the bulb.
Describe the Geocentric Model of the our solar system.
Answer:
its basically our universe
Explanation:
:) hope this helps
Which condition would cause the altimeter to indicate a lower altitude than actually flown (true altitude)
The altimeter records a lesser than actual altitude when the temperature is colder than standard.
What is altitude?The term altitude refers to given height above sea level. Usually a device called an altimeter is used to measure the altitude.
Sometimes, the altimeter may record a value that is less than the actual value of the altitude because the temperature is colder than standard.
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7. Our state of mind affects how we observe our surroundings. What
mental state is the best for observing?
I
a) happy
c) nervous
b) relaxed d) excited
In the process of photosynthesis, how do plants obtain the water, carbon dioxide, and energy they use for this process?
Answer:
They get it from the air and soil. They also take energy from the sun.
Explanation:
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil.
A mercury atom emits a photon when an electron in the atom moves from energy level f to energy level d. Determine the energy of the emitted photon, in joules.
which statement best describes the position vs. time and acceleration vs. time graphs for an object that is speeding up and for an object that is not?
The position vs. time graph is a depiction of the motion of an object with time, while the acceleration vs. time graph is a depiction of how the acceleration of an object changes with time. The position-time graph will show an increasing slope for a moving object and a decreasing slope for a stationary object.
When an object is speeding up, its acceleration increases, and when it is slowing down, its acceleration decreases.The slope of the acceleration-time graph reflects the change in velocity over time. For an object that is speeding up, the acceleration-time graph has a positive slope since the object's speed is increasing, whereas for an object that is slowing down, the slope of the acceleration-time graph is negative, and the object's speed is decreasing. Finally, for an object that is stationary, the acceleration-time graph has a slope of zero since the speed is not changing.
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