How would the size of
parachute required on a space
probe to allow it to land safely
differ on:
a planet such as Venus
which has a thick
atmosphere.
Answers
Answer:
Explanation:
The atmosphere is too thin to slow the descent for a soft landing. Mars is almost a vacuum, it is the equivalent to Earth atmosphere around 125,000 feet. ... You do not want your lander to get entangled with the chute on landing, so you loose the chute right before you land.
Related Questions
a cd has a diameter of 12.0 cm. if the cd is rotating at a constant angular speed of 20 radians per second, then the linear speed of a point on the circumference is
Answers
the circumference of the CD is moving at a constant speed of 120 cm/s when the CD is rotating at a constant angular speed of 20 radians per second.
The circumference of the CD can be calculated using the formula C = πd, where d is the diameter. So, for a CD with a diameter of 12.0 cm, the circumference is C = π(12.0 cm) = 37.7 cm (rounded to one decimal place).
The linear speed of a point on the circumference can be found using the formula v = ωr, where ω is the angular speed and r is the radius of the circle. Since the radius of the CD is half the diameter, it is 6.0 cm.
So, the linear speed of a point on the circumference is v = (20 rad/s) x (6.0 cm) = 120 cm/s.
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A train and a bicycle have a head-on collision. Compare the force of impact between the train and the bicycle; compare the accelerations of the train and bicycle. (5 points)
Answers
Answer:
The train will have a greater impact than the bike
The train will have a bigger net force than the bike, so the acceleration of the train will be slower than the bike. In order to achieve the same acceleration, the train requires a bigger net force.
Danny wants to construct a device that demonstrates one of Newton's laws of motion. He makes a small cart and adds marbles to it. He then places it on a ramp with a small wall at the end of the ramp. When he releases the cart, it accelerates down the ramp until it hits the small wall at the end. His setup is shown below.
Answers
Answer: D. It shows Newton's first law of motion, which states that an object tends to stay in motion unless an outside force acts upon it.
Explanation:
Newton's first law of motion states that an object tends to stay in motion unless an outside force acts upon it.
Note that outgoing longwave radiation is also determined by the Stefan-Boltzmann equation. If we assume that energy is balanced, we can substitute 342 W/m
2
for F
Lout.
Insert this and your answer to question 1 for F
sin,
and rearrange Equation 2−8 to solve for the Earth temperature without an atmosphere. Type your answer and submit Given an answer to the previous question of 255 K, convert this to degrees Celsius and degrees Fahrenheit. Do you believe this is colder or warmer than the actual average temperature of the Earth? Type your answer and submit
Answers
The Earth's temperature without an atmosphere, determined by substituting 342 W/m² for outgoing longwave radiation and rearranging the Stefan-Boltzmann equation, is approximately 255 K.
By substituting the given values into the Stefan-Boltzmann equation, we can solve for the Earth's temperature without an atmosphere. Assuming an emissivity of 1, the equation becomes 342 = (5.67 × 10^-8) × T^4. Solving for T yields a temperature of approximately 255 K.
Converting this temperature to degrees Celsius, we subtract 273.15 to obtain approximately -18.15 °C. Similarly, converting to degrees Fahrenheit using the conversion formula, we find approximately -0.67 °F.
This temperature of -18.15 °C (or -0.67 °F) represents the hypothetical temperature of the Earth without an atmosphere. Comparing it to the actual average temperature of the Earth, around 15 °C (or 59 °F), we can see that it is significantly colder. The presence of the atmosphere is crucial for trapping heat through various greenhouse gases, such as carbon dioxide and water vapor, which maintain a habitable temperature range on Earth. Without the atmosphere's greenhouse effect, the Earth's temperature would be much colder, emphasizing the vital role played by our atmosphere in sustaining life on the planet.
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A bicycle wheel has a radius r = 0.25 m and rotates at a constant frequency of f = 98 rev/min. Calculate the period of rotation T of the wheel in seconds. What is the tangential speed of a point on the wheel's outer edge in m/s?
Answers
The period of rotation of the wheel is 0.6127 seconds.
The tangential speed of a point on the wheel's outer edge is 2.5624 m/s.
To calculate the period of rotation T, we need to convert the frequency from revolutions per minute (rev/min) to revolutions per second (rev/s).
Given:
The radius of the wheel (r) = 0.25 m
Frequency of rotation (f) = 98 rev/min
First, let's convert the frequency to rev/s:
Frequency in rev/s = Frequency in rev/min / 60
f' = 98 rev/min / 60 = 1.6333 rev/s (rounded to four decimal places)
Now, we can calculate the period of rotation T:
T = 1 / f'
T = 1 / 1.6333 rev/s = 0.6127 s (rounded to four decimal places)
The period of rotation (T) of the wheel is approximately 0.6127 seconds.
To calculate the tangential speed of a point on the wheel's outer edge, we can use the formula:
Tangential speed = \(\frac{2\pi r}{T}\), where T is the time period
Substituting the given values:
Tangential speed = 2 * \(\pi\) * (0.25 m) / 0.6127 s
Tangential speed = 2 * 3.14 * 0.25 / 0.6127 s = 2.5624 m/s (rounded to four decimal places)
The tangential speed is 2.5624 m/s.
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A 0. 0850-kg arrow is fired horizontally. If the bowstring exerts an average force of 89. 0 n on the arrow over a distance of 0. 782 m, with what speed does the arrow leave the bow?.
Answers
40.47 m/s is the speed at which the arrow departs the bow.
Does velocity not depend on gravity?
An object's horizontal velocity is constant for small displacements and operates independently of the vertical force of gravity. The horizontal and vertical halves of an object that is projected at an angle to gravity can also be separated. The force of gravity has no impact on the horizontal velocity component either.
The arrow will start moving and accelerating as soon as it is let go from the bow. The arrow obeys the second law of motion, according to Newton. The method
m = mass of the arrow (kg) = 0.0850 kg
a = acceleration of the arrow (m/s²)
F = force (N) = 89.0 N
F=m*a
a = 1,047.059 m/s²
When an object accelerates, it will travel in a non-uniform manner. The method
\(v^{2} = v_{0} ^{2} +2*a*d\)
= 40.47 m/s
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A delivery truck with 2.5 {\rm m}-high aluminum sides is driving west at 60 {\rm km/hr} in a region where the earth's magnetic field is \vec {\rm B}\; =\; (5.0 \times10^{-5}\;{\rm T},\; {\rm north})a. What is the potential difference between the top and the bottom of the truck's side panels?b. Will the tops of the panels be positive or negative relative to the bottoms? positive or negativeplease answer fully. Thank you
Answers
The potential difference between the top and bottom of the truck's side panels is \(2.08 x 10^-3 V\).
(a) The potential difference between the top and bottom of the truck's side panels can be calculated using the formula:
ΔV = Bdv
where B is the magnitude of the magnetic field, d is the height of the aluminum sides, and v is the velocity of the truck. Substituting the given values, we get:
\(ΔV = (5.0 x 10^-5 T) * (2.5 m) * (60 km/hr)\).
First, we need to convert the velocity from km/hr to m/s
ΔV =\((5.0 x 10^-5 T) * (2.5 m) * (16.67 m/s\))
Simplifying this expression, we get:
ΔV = \(2.08 x 10^-3 V\)
Therefore, the potential difference between the top and bottom of the truck's side panels is 2.08 x 10^-3 V.
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Invent a previously untried set of changes to make something interesting happen. Describe what you did, and what the effects were.
Answers
Answer:
Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases.
How many 38 degrees c to f?
Answers
38 degrees Celsius is equal to 100.4 degrees Fahrenheit.
To convert Celsius to Fahrenheit, you can use the following formula:
F = (9/5)C + 32
where F is the temperature in Fahrenheit and C is the temperature in Celsius.
So if we plug in 38 for C, we get:
F = (9/5) * 38 + 32 = 100.4
Therefore, 38 degrees Celsius is equal to 100.4 degrees Fahrenheit.
Temperature is a measure of the thermal energy of a substance or system. The most commonly used units of temperature are Celsius (°C), Fahrenheit (°F) and Kelvin (K).
To convert a temperature from Celsius to Fahrenheit, you can use the following formula:
°F = (9/5) x °C + 32
To convert a temperature from Fahrenheit to Celsius, you can use the following formula:
°C = (5/9) x (°F - 32)
To convert from Celsius to Kelvin you can use the following formula:
K = °C + 273.15
To convert from Fahrenheit to Kelvin you can use the following formula:
K = (5/9) x (°F - 32) + 273.15
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If a big force acts on the metal towers of the suspension bridge, the tower will not break into pieces like glass, but will bend instead. Which property of metals explains this phenomenon?.
Answers
If a big force acts on the metal towers of suspension bridge, the tower will not break into pieces like glass, but will bend instead. This is due to the ductile property of metals.
Metals have a greater intermolecular force between their particles. Suspension bridges are usually made of metals instead of materials like glass or any other materials lacking ductility. Glass is a brittle material and that is the reason it is broken into pieces.
The property of metals to be drawn into thin wires is called ductility. Metals do not undergo sudden collapse.
It is due to the ductile property that suspension bridge do not break when strong force acts on it.
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Which describe the image formed by a convex mirror? Check all that apply.
virtual
STRE
real
upside down
A
right-side up
larger than the object
smaller than the object
same size as the object
Answers
Answer:
smaller than the object
Explanation:
The rest are incorrect; It has an upright image.
Answer: Smaller Than the object and right-side up
Answer each question yes or no. Must two quantities have the same dimensions (a) If you are adding them? (b) If you are multiplying them? (c) If you are subtracting them? (d) If you are dividing them? (e) If you are equating them?
Answers
(a) If you are adding them: Yes, two quantities being added must have the same dimensions. When adding quantities, it is essential that they have the same units to ensure that the operation is mathematically meaningful.
(b) If you are multiplying them: No, two quantities being multiplied do not need to have the same dimensions. Multiplication is valid between quantities of different dimensions. The resulting unit of the product will depend on the units of the individual quantities being multiplied.
(c) If you are subtracting them: Yes, two quantities being subtracted must have the same dimensions. Subtraction requires the quantities to have the same units to ensure that the operation is mathematically valid.
(d) If you are dividing them: No, two quantities being divided do not need to have the same dimensions. Division is valid between quantities of different dimensions. The resulting unit of the quotient will depend on the units of the numerator and denominator.
(e) If you are equating them: Yes, two quantities being equated must have the same dimensions. Equating quantities means that they are equal in magnitude and unit, so their dimensions must match.
In summary, the requirement for the same dimensions varies depending on the operation performed between the quantities. Addition and subtraction require the same dimensions, while multiplication, division, and equation do not have this requirement.
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How does asexual reproduction provide an advantage to the organisms that live on a rotting log?
Answers
Answer:
Only one parent is needed, and it is faster than sexual reproduction.
Explanation:
Sorry I'm not the best at explaining it but that's the answer.
asexual reproduction provides an advantage to the organisms that live on a rotting log by generating huge number of creatures in a very short amount of time
What is asexual reproduction ?Asexual reproduction refers to a type of reproduction where a child is born to a single parent. The newly created people are clones of their parents since they have the same genetic makeup and physical characteristics.
Both multicellular and unicellular species can reproduce asexually. There will be no gamete fusion involved in this procedure, and the number of chromosomes will remain the same. With the exception of specific situations where there is a possibility that a rare mutation will occur, it will inherit the same genes as the parent.
The benefits of asexual reproduction are as follows:
There is no need for mates.Rapid reproduction is the norm.In a very short amount of time, a huge number of creatures can be created.Adaptive genetic factors are passed down across generations.It happens in a variety of environments.Learn more about reproduction, refer the link:
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a tangent is ________ to the radius that shares the point of tangency.
Answers
A tangent is perpendicular to the radius that shares the point of tangency. When a tangent line meets a circle, it forms a right angle with the radius at the point of tangency.
A tangent line is a straight line that intersects a circle at a single point and does not pass through the center of the circle. At the point of tangency, a tangent line to a circle is perpendicular to the radius that intersects it. The radius is the line segment that joins the center of the circle to any point on the circle. A perpendicular line is one that makes a right angle or 90-degree angle with another line. Thus, a tangent line is perpendicular to the radius at the point of tangency.When drawing a tangent line, it is essential to remember that the point of tangency is the only point of intersection between the tangent line and the circle. Additionally, the tangent line can only intersect the circle at a single point. If the line passes through the center of the circle, it is not a tangent line as it intersects the circle at every point on the circle. Therefore, a tangent line is perpendicular to the radius that shares the point of tangency.
A tangent line is perpendicular to the radius that intersects it at the point of tangency. A tangent line is a straight line that intersects a circle at a single point and does not pass through the center of the circle. Therefore, when drawing a tangent line, it is essential to remember that the tangent line can only intersect the circle at a single point.
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If a lever has a mechanical advantage of 5 and 50 N of force is used to lift a rock, what is the weight of the rock?
Answers
what is acceleration time-graph and velocity time-graph
Answers
Answer:
The acceleration time graph is the graph that is used to determine the change in velocity in the given interval of the time. ... The acceleration time graph is used to find the change in the velocity of the moving object for the given period of time and this can be determined by finding the area under the curve
Explanation:
does energy play an important role in global warming?
pls answer quick - ill give u all my points
Answers
Answer:
Yes.
Globally, energy usage is by far the most significant source of greenhouse gas emissions from human activity. About two-thirds of worldwide greenhouse gas emissions are associated with the use of fossil fuels to provide energy for heating, electricity, transportation, and industry.
Hope this helped :)
A 2.90-kg block is released from rest and allowed to slide down a frictionless surface and into a spring. The far end of the spring is attached to a wall, as shown. The initial height of the block is 0.500 m above the lowest part of the slide and the spring constant is 443 N/m. A. What is the maximum compression of the spring?B. The spring sends the block back to the left. How high does the block rise?
Answers
Part (a)
The potential energy of the block due to its height can be given as,
\(U=\text{mgh}\)The potential energy due to presence of spring can be expressed as,
\(U=\frac{1}{2}kx^2\)Equating both the values,
\(\begin{gathered} \text{mgh}=\frac{1}{2}kx^2 \\ x^2=\frac{2mgh}{k} \\ x=\sqrt[]{\frac{2mgh}{k}} \end{gathered}\)Substitute the known values,
\(\begin{gathered} x=\sqrt[]{\frac{2(2.90kg)(9.8m/s^2)(0.500\text{ m)}}{(443\text{ N/m)}}(\frac{1\text{ N}}{1kgm/s^2})} \\ \approx0.253\text{ m} \end{gathered}\)Thus, the maximum compression of the spring is 0.253 m.
Part (b)
Since the slide is frictionless, therefore no energy loss happened during the sliding of block. Therefore, the block will rise up to the same initial height which is 0.500 m.
By referring to Standard Method of Measurement 2 (SMM2), explain the following clauses:
i. D.10
ii. D.12.4
iii. D.12.6
iv. D.12.8
Answers
SMM2 refers to the Standard Method of Measurement 2. It is a document that specifies the method and processes used in measuring buildings and civil engineering works. SMM2 is commonly used in the construction industry.
The following are explanations of the clauses under Standard Method of Measurement 2 (SMM2):
i. D.10: This clause under SMM2 relates to the painting of metal and timber surfaces. It stipulates that when painting the surfaces of timber or metal, the preparation of surfaces and application of paint must conform to manufacturer specifications. It also specifies that the paint must be applied using a brush, roller, or spray. The clause then goes on to outline specific measurements for the thickness of paint coating to be applied on surfaces.
ii. D.12.4: This clause under SMM2 refers to the construction of walls using concrete blocks. It states that the concrete blocks used should have a minimum density of 1500 kg/m3. It also outlines specific measurements for the thickness of the mortar to be used for bonding the blocks together. The clause further specifies the measurement of the joint thickness between blocks.
iii. D.12.6: This clause under SMM2 refers to the rendering of walls with a cement mortar mix. It specifies that before rendering, the surface of the wall must be clean, dry, and free of debris. It also outlines specific measurements for the thickness of the rendering to be applied to the wall. The clause then stipulates that the rendering should be finished with a smooth surface that conforms to the architect's specifications.
iv. D.12.8: This clause under SMM2 refers to the painting of interior plastered walls. It stipulates that the preparation of surfaces and application of paint must conform to manufacturer specifications. It also specifies that the paint must be applied using a brush, roller, or spray. The clause then goes on to outline specific measurements for the thickness of paint coating to be applied on surfaces.
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Which statement describes how electrical power is calculated?
Answers
Answer:
D. Power is the product of voltage and current.
Explanation:
Electrical power is derived from the product of current and voltage;
Power = current x voltage = I V
I is the current
V is the voltage
R is the resistance
Now;
V = IR;
So;
Power = I x (IR) = I²R
Also,
Power = \(\frac{V^{2} }{R}\)
The right choice is D
If a storm is 7. 5 kilometers away, how much time is expected between observations of lightning and thunder? Round your answer to one decimal place. Seconds.
Answers
The expected time period between the observations of lightning and thunder would be 22.5 s.
How to calculate the time of sound waves?
The time taken by sound to reach a certain position can be calculated by the speed formula,
\(S = \dfrac dt\)
Where,
\(S\) - speed = 0.343 km/s
\(d\) - distance = 7.5 km
\(t\) - time = ?
Put the values in the formula,
\(0.343 = \dfrac {7.5} t\\\\t = \dfrac {0.343}{7.5}\\\\t = 22.5\)
Therefore, the expected time period between the observations of lightning and thunder would be 22.5 s.
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what is 120 °F to °C?
Answers
Celsius (°C) and Fahrenheit (°F) -273.15°C, or -459.67°F; -50°C, or -58.0°F; -40°C, or -40.0°F; -30°C, or -22.0°F; -20°C, or -4.0°F; and -10°C, or 14.0°F.
Incomplete: °
For reference, 48.89 °C, or 120 °F, is the temperature in Celsius.
To convert a degree in Fahrenheit to a degree in Celsius, use the Fahrenheit to Celsius formula. Celsius is calculated as [(°F-32)5]/9 in Fahrenheit. Add 32 and multiply the result by.5556 (or 5/9) to convert degrees Fahrenheit to Celsius. Simply multiply the result by 1.8 (or 9/5) and add 32 to get the temperature in Fahrenheit. As opposed to 180 degrees on the Fahrenheit scale, 100 degrees on the Celsius scale separates the freezing point and boiling point of water.
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At which point is the object not moving?
A
B
C
D
All of these.
None of these.
Answers
which element is loacted in group 17 period 6
Answers
john and caraline go out for a drive one day. this graph reprresents the distance they travlled over time during what part of time are they not moving.
Answers
Explanation:
where is the graph mate ??????
Answer:
hjjjjnbb tuu tui amr sathe vat karu chu ka kya hua tha ki da best
Explanation:
jjjkkk
john and caraline go out for a drive one day. this graph reprresents the distance they travlled over time during what part of time are they not moving.
if space has a hyperbolic geometry, what will happen to two initially parallel flashlight beams as they traverse billions of light-years of space?
Answers
In a space with hyperbolic geometry, the behavior of parallel lines differs from that of Euclidean geometry.
In hyperbolic space, parallel lines diverge from each other as they extend further.If two initially parallel flashlight beams traverse billions of light-years of space in a hyperbolic geometry, they will gradually diverge from each other. The divergence between the beams will increase as they travel a greater distance.
This phenomenon is a consequence of the non-Euclidean geometry of space. In hyperbolic space, the curvature causes parallel lines to "spread out" or diverge. The extent of the divergence will depend on the specific curvature of the space and the distance traveled.
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the doppler shift was first tested in 1845 by the french scientist b. ballot. he had a trumpet player sound an a, 440 hz, while riding on a flatcar pulled by a locomotive. at the same time, a stationary trumpet player played the same note. ballot heard 3.0 beats per second. how fast was the train moving toward him? (assume 343m/s for speed of sound):
Answers
The train was moving towards Ballot at a speed of approximately 51.45 meters per second.
The Doppler effect is the change in frequency of a wave (such as sound or light) due to the relative motion between the source of the wave and the observer. In this experiment, Ballot observed a frequency shift known as beats, which occur when two waves of slightly different frequencies interfere with each other. The beat frequency can be calculated by subtracting the frequency of the stationary source from the frequency observed by the moving observer.
Since Ballot heard 3.0 beats per second, it means that the observed frequency was slightly lower than the actual frequency. By using the formula for the beat frequency, we can calculate the difference between the observed frequency and the actual frequency:
Beat frequency = observed frequency - actual frequency
3.0 beats/second = (frequency observed by Ballot) - 440 Hz
Since the observed frequency is lower than 440 Hz, it implies that Ballot was moving towards the source of the sound. Using the speed of sound as 343 m/s, we can determine the speed of the train towards Ballot:
Speed of train = beat frequency × wavelength of sound
The wavelength of sound can be calculated using the formula:
Wavelength = speed of sound / frequency
Wavelength = 343 m/s / 440 Hz = 0.7795 m
Therefore, the speed of the train can be calculated as:
Speed of train = 3.0 beats/second × 0.7795 m/beat = 2.3385 m/s
Converting meters per second to kilometres per hour:
Speed of train = 2.3385 m/s × 3.6 km/h = 8.4186 km/h
Hence, the train was moving towards Ballot at a speed of approximately 8.42 km/h, or equivalently, 51.45 meters per second.
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If the driver slammed on the brakes, what could happen to the crate?
Answers
what force would have to be applied to the crate by the rope in order for the crate to move with constant velocity
Answers
For the crate to move at a constant speed, a force of 190 newtons must be exerted, which is the same as the kinetic friction between the crate and the floor.
What kind of force is required to keep it moving at a constant speed?
Since Newton's first law of motion states that an object moving at a constant speed experiences no net external force, the total force acting on the object must be zero.
Where is the applied force, please?
The applied force is obtained by multiplying the mass by the acceleration and then subtracting the frictional force.
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What contribution to astronomy was made by tycho brahe?.
Answers
Tycho Brahe was a prominent astronomer who lived in the late 16th century. He is best known for his contributions to the understanding of planetary motion and his meticulous observational records that were later used by Johannes Kepler to formulate his laws of planetary motion. In this answer, we will explore the contributions made by Tycho Brahe to astronomy.
Tycho Brahe was born into a noble family in Denmark in 1546. He was fascinated by astronomy from a young age and began his studies in earnest when he was a teenager. His first significant contribution to the field of astronomy was the creation of a new system of planetary motion.
Tycho Brahe believed that the planets orbited the sun, but that the sun, in turn, orbited the Earth. This system of planetary motion, known as the Tychonic system, was a significant departure from the geocentric model that had been proposed by Aristotle and Ptolemy.
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