Answer:
83%
Explanation:
On the surface, the weight is:
W = GMm / R²
where G is the gravitational constant, M is the mass of the Earth, m is the mass of the shuttle, and R is the radius of the Earth.
In orbit, the weight is:
w = GMm / (R+h)²
where h is the height of the shuttle above the surface of the Earth.
The ratio is:
w/W = R² / (R+h)²
w/W = (R / (R+h))²
Given that R = 6.4×10⁶ m and h = 6.3×10⁵ m:
w/W = (6.4×10⁶ / 7.03×10⁶)²
w/W = 0.83
The shuttle in orbit retains 83% of its weight on Earth.
The correct option is c) 83%.
Given :
A shuttle on Earth has a mass of [tex]4.5\times 10^5[/tex] kg.
Shuttle is at height of [tex]6.3\times 10^5[/tex] meters above the surface of the Earth.
Solution :
On the surface of Earth, the weight is
[tex]\rm W = \dfrac{GMm}{R^2}[/tex] ---- (1)
Where,
G is the gravitational constant,
M is the mass of the Earth,
m is the mass of the shuttle,
R is the radius of the Earth.
In orbit the weight is,
[tex]\rm w = \dfrac{GMm}{(R+h)^2}[/tex] ----- (2)
Now we take the ratio of equation (2) to (1),
[tex]\rm \dfrac{w}{W}= \dfrac{R^2}{(R+h)^2}[/tex] ----- (3)
Now put the values of R and h in equation (3) we get,
[tex]\rm \dfrac{w}{W} = 0.83[/tex]
= 83%
Therefore, the correct option is c) 83%
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farthest Galaxy in the universe
Answer:
Galaxy MACS0647-JD
Explanation:
which of the following is a helpful process in evaluating scientific claims?
a. quoting statistics
b. making lists
c. biased thinking
d. critical thinking
PLEASE NEED THE ANSWER ASAP!!!!!!!
Answer: D. If you look at the claims with critical thinking then you will be less likely to be fooled by something false
Answer: d. critical thinking
Explanation:
A scientific claim is a statement which is based on evidences obtained after the experimental trials and direct observatory approach of the process occurring in the nature.
Critical thinking based on the approach of verification and analysis can be used to evaluate the scientific claims. The result of evaluation will be reliable and acceptable. The evaluation should not be biased or presumed it will yield inappropriate results.
At what height from the earth, g becomes
?
a)g/2
b) 0.414 R
d) R
c) 0.7 R
Explanation:
Near the surface of the Earth (sea level), gravity decreases with height such that linear extrapolation would give zero gravity at a height of one half of the Earth's radius - (9.8 m. s−2 per 3,200 km.)
Height from the earth, g becomes g/2.
What is meant by gravity-g?The gravity of Earth, which is denoted by g, refers to the acceleration that the Earth imparts to objects on or near its surface. In SI units this acceleration is measured in metres per second squared (in symbols, m/s2) or equivalently in newtons per kilogram (N/kg).Height from the earth, g becomes g/2.
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To play ice hockey, each player needs ________. skates rollerblades crosses sunglasses
Answer:
skates
Explanation:
Ice hockey is considered to be an extremely tough sport in which there are twelve players who fights over small 3" puck which can be launched like a missile. If one plays ice hockey he should must have necessary equipment to support his sport. These equipment include Ice Skates,Helmet with Cage and Mouth-guard:, Hockey stick, Hockey pants,Hockey gloves, shoulder pads, elbow pads, Shin Guard:Neck guard and Jockstrap (men) or Pelvic protector (women).
Here we can see that correct choice is ice skate which is important for supporting player's ankles while playing ice hockey.
Hope it helps!
What's the differentiating characteristic between an element and a compound
Answer:
an element is a pure substance whereas a compound is a mixture of two or more elements.
The basic difference between a compound and an element is its constituents, in which the element is a pure individual chemical substance which has similar atom and compound is a mixture of two or more elements bounded chemically.
Explanation:
Elements:
Elements are pure homogenous substance. Elements have similar atoms grouped together. Element is being represented with the chemical scientific symbol.Compounds:
Compound are heterogeneous mixture of elements. Compound has different atoms which is combined in fixed ratio. Compound is given by chemical formula.A bobcat jumps with a speed of 5 m/s at an angle of 55º. How long does the
bobcat stay in the air?
Answer- 0.84 s
Explanation:
y = y₀ + v₀ᵧ t + ½ gt²
where y is the final height,
y₀ is the initial height,
v₀ᵧ is the initial vertical velocity,
g is the acceleration due to gravity,
and t is time.
0 m = 0 m + (5 sin 55º m/s) t + ½ (-9.8 m/s²) t²
0 = 4.10 t − 4.9 t²
0 = t (4.10 − 4.9 t)
t = 0, t = 0.84
The bobcat lands after 0.84 seconds.
Answer:
0.84
Explanation:
Apex ; good luck with your tests!
Protons are found in the
of the atom.
O A. nucleus
Bmembrane
o C. electron clouds
OD. outside
Answer:
A. nucleus
Explanation:
Protons are found in the nucleus of the atom.
WILL GIVE BRAINLEST!
Why is this an open energy system?
Answer:
Open energy system models are energy system models that are open sources.
An alloy of gold and silver has a mass of 1050g and a volume of 60cm cubic .if the density of gold is 19.3g/cm cubic and that of silver is 10.5g/cm cubic. Find the mass of gold
Answer:
921 g
Explanation:
If S is the mass of silver and G is the mass of gold, then the total mass is:
S + G = 1050
And the total volume is:
S/10.5 + G/19.3 = 60
Using substitution:
S = 1050 − G
(1050 − G)/10.5 + G/19.3 = 60
(1050 − G) (19.3) + G (10.5) = 60 (19.3) (10.5)
20265 − 19.3G + 10.5G = 12159
8106 = 8.8G
G = 921.1
Rounded to 3 significant figures, the mass of the gold is 921 grams.
The mass of gold in the alloy can be determined by using the given alloy mass, volume, and the known densities of gold and silver. By setting up the appropriate equations and solving, we find that the alloy contains approximately 816.4g of gold.
Explanation:The mass (M) is the total amount of gold and silver present in the alloy and can be represented as M = M_gold + M_silver, where M_gold and M_silver are the masses of gold and silver respectively. Given that the total mass of the alloy is 1050g, and the total volume is 60cm³, we can calculate the mass of gold using the known densities for gold and silver (19.3g/cm³ and 10.5g/cm³ respectively).
The volume of each metal in the alloy is given by the formula: Volume = Mass/Density. Therefore, for the alloy, we have 60cm³ = M_gold/19.3g/cm³ + M_silver/10.5g/cm³. We know that M_silver = 1050g - M_gold. Substituting M_silver into the volume equation and solving for M_gold yields a value of approximately 816.4g of gold in the alloy.
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distance is a vector quantity ... true or false
Answer:
False
Explanation:
Distance is a sclalar quantity as it has only magnitude and no dirction.
Vector quantities have both magnificent and direction.
HOPE IT HELPS....
It is false that Distance is a vector quantity. Distance is not a vector quantity; it is a scalar quantity. Scalar quantities are physical quantities that have only magnitude and no direction.
They are described completely by their numerical value and units.
On the other hand, vector quantities have both magnitude and direction, and they are represented by arrows in a specific direction. Examples of vector quantities include displacement, velocity, acceleration, force, and momentum.
When we talk about distance, we are only concerned with the total length or magnitude of the path traveled by an object or the space between two points, without regard to the direction of motion. Since it lacks a specific direction, distance is considered a scalar quantity.
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Which nucleus completes the following equation?
Answer:
D
Explanation:
Whatever question mark is, it will have to have a 1 taken away from the atomic number of Br.
The atomic mass of the electron doesn't change anything, so whatever ? is, it has a mass of 85.
Since ? is 85 / 34 Se, the answer much be D
Answer:
85 36 Kr
Explanation:
yeah
What is the correct definition of momentum, p =
Question 18 options:
The momentum of an object is the product of its mass and its velocity.
The momentum p is related as, p = mv
Explanation:
Momentum of an object is defined by the two variables;
(i) mass of the object
(ii) velocity at which the object travels.
Hence momentum is the product of the above two variables it is directly proportional to them and it is represented by the unit (kg.m) / s where kg represents the mass of the object, m / s for velocity of the object.
A 0.111 kg hockey puck moving at 55 m/s is caught by a 80. kg goalie at rest. with what speed does the goalie slide on the frictionless ice?
Answer:
0.076 m/s
Explanation:
Momentum is conserved:
m v = (m + M) V
(0.111 kg) (55 m/s) = (0.111 kg + 80. kg) V
V = 0.076 m/s
After catching the puck, the goalie slides at 0.076 m/s.
The speed with which the goalie slide on the frictionless ice is 0.076 m/s.
From the principle of conservation of linear momentum;
Momentum before collision = momentum after collision
Mass of the hockey puck = 0.111 kg
Speed of the hockey puck = 55 m/s
Mass of the goalie = 80 kg
Speed of the goalie = 0 m/s
Following the law of conservation of linear momentum;
(0.111 kg × 55 m/s) + (80 kg × 0 m/s) = (0.111 kg + 80 kg) V
V = (0.111 kg × 55 m/s) + (80 kg × 0 m/s)/ (0.111 kg + 80 kg)
V = 6.105/80.111
V = 0.076 m/s
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A hunter directs his uncalibrated rifle towards a monkey sitting on a tree, at a heigh above the ground and at distance . the instant the monkey observes the flash of the fire of the rifle ,it drops from the tree.Will the bullet hit the monkey?
Answer:
Yes if the hunter has great accuracy it would hit the monkey, It might even hit it in a more fatal spot. For example, if you were aiming at the belly area and he dropped as you took the shot then maybe it hits more towards a deadly organ or the brain. Bullets travel insanely fast speeds, and I hunt so yes, it would definatly hit the monkey if the hunter was accurate
Hope this helps ya' :)
Good Luck :D
The bullet will hit the monkey as they both are subjected to the same gravitational pull and fall to the ground at the same rate after the rifle is fired and the monkey drops.
Explanation:The subject of this question is Physics. The situation described here is a perfect example of Projectile Motion and gravitational force.
When a bullet is fired horizontally (assuming the absence of air resistance), it will start to drop immediately due to earth's gravity. Similarly, when the monkey observes the flash of the fire and drops, it is subjected to the same gravitational pull. Therefore, it doesn't matter that the monkey lets go of the tree because the bullet and the monkey both fall towards the earth at the same rate. So, if the hunter aims directly at the monkey at the instant it drops, the bullet will hit the monkey.
This question highlights an interesting point about projectile motion and how gravitation plays an important role in it. It ensures that all objects near earth fall to the ground at the same rate, regardless of their horizontal motion.
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There are two balloons of charges +3.37 x 10-6 C and –8.21 x 10-6 C. The distance between the two balloons is 2.00 m. Determine the force between the two balloons.
F = 0.06N. Since the charges has different signs the force of atraction between them is 0.06N.
In order to solve this exercise we have to use Coulomb's Law equation which says that the magnitude of each of the electric forces with which two point charges at rest interact is directly proportional to the product of the magnitude of both charges and inversely proportional to the square of the distance that separates them. Given by the equation:
[tex]F = k\frac{|q_{1}q_{2}|}{d^{2}}[/tex]. Where k is the Coulomb's Constant [tex]k = 9x10^{9}\frac{Nm^{2} }{C^{2} }[/tex], q1 and q2 are the charges value in Coulomb (C), and d is the distance between charges in meters (m).
There are two balloons of charges +3.37 x 10-6 C and –8.21 x 10-6 C. The distance between the two balloons is 2.00 m. Calculate the force between the two ballons.
[tex]F = 9x10^{9}\frac{Nm^{2} }{C^{2} } \frac{|(3.37x10^{-6}C)(-8.21x10^{-6}C)|}{(2.00m)^{2}}\\F = 9x10^{9}\frac{Nm^{2} }{C^{2} } \frac{|-2.77x10^{-11}C^{2} )|}{4.00m^{2}}\\F = 9x10^{9}\frac{Nm^{2} }{C^{2} }(6.92x10^{-12})\frac{C^{2} }{m^{2}}\\F = 0.06N[/tex]
What is the sum of two vectors?
A. addition vector
B. displacement vector
c. distance vector
D. resultant vector
Answer:
resultant vector
the answer is the resultant vector
The sum of two vectors D. resultant vector
What is a vector ?
A vector is an object that has both a magnitude and a direction
a) Vector addition is the operation of adding two or more vectors together using laws (such as triangle or parallelogram law ) , hence wrong option
b) Displacement is a vector whose length is the shortest distance from the initial to the final position , hence wrong option
c) Distance is not a vector quantity it is a scaler quantity , wrong option
d) The resultant is the vector sum of two or more vectors. It is the result of adding two or more vectors together, hence it is a correct option
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What are three disadvantages of making and using plastic? It pollutes the land and water. It requires cutting down trees for raw materials. It takes an incredibly long time to break down. It freely conducts heat and electricity. It isn’t easy to recycle.
Answer:
The correct answers would be option A, C and E.
Explanation:
A material made up of synthetic or semi synthetic compounds is called Plastic. This material is malleable and can be molded into solid form. There are many disadvantages of using the plastics. Three of the main disadvantages are :
- Plastic pollutes the land and water. Because it does not decay.
- Plastic takes an incredibly long time to break down.
- Plastic is not easy to recycle.
Above mentioned problems make the use of plastic so undesirable.
Answer:
A. It pollutes the land and water.
C. It takes an incredibly long time to break down.
E. It isn’t easy to recycle.
Explanation:
when a force of 5N acts on a surface, it produces a pressure of 500pa. what is the area of surface
Force that acts on area is defined as pressure,
[tex]p=\dfrac{F}{A}[/tex]
If we solve for area,
[tex]A=\dfrac{F}{p}[/tex]
Now put in the data.
[tex]A=\dfrac{5N}{500Pa}=\boxed{0.01m^2}[/tex]
The area of surface is 0.01m^2
Hope this helps.
r3t40
importance of electrical symbol
Electrical symbols in circuit diagrams are crucial for understanding and communicating complex electrical concepts and layouts. They represent key components like wires, power sources, resistors, and ground in a standardized, universally understood format. This foundational knowledge is essential for anyone in the field of electrical engineering or anyone interfacing with electrical technology.
Explanation:The importance of electrical symbols in circuit diagrams and the broader field of electrical engineering cannot be overstated. These symbols serve as a universal language that allows scientists, engineers, and technicians to succinctly communicate complex electrical concepts and circuit layouts without the need for lengthy explanations. The main symbols in circuit diagrams include the wire, which represents the pathway for electrical flow; the battery or voltage source, supplying the energy; resistors, which control the flow of electric current; and the ground, indicating a common return path for an electrical current.
Understanding these symbols and their applications is crucial for anyone involved in the study or practice of electrical engineering. Electrical schematics simplify the analysis of circuits, which can range from simple battery connections in small devices to complex electric circuits in high-tech equipment. This simplified representation is essential for designing, troubleshooting, and improving electrical systems. Moreover, the advancement in electrical science significantly owes to the standardized terminology and symbolism that emerged over the past few decades, making it easier for professionals to communicate their ideas and understandings effectively.
Lastly, in the real world, we depend heavily on electricity and electrical appliances, making the study of electrical circuits vital. Knowledge of these symbols and how to interpret circuit diagrams equips individuals with the ability to understand the workings of everyday technology, from computers to household appliances, especially in troubleshooting and maintenance.
Which of these questions is a scientific question about skateboarding?
A How fast does a skateboard move at the bottom of a ramp?
B. Which color of wheel looks best?
C. Should skateboarding be allowed in shopping malls?
D. What is the best trick to do while moving backward?
Answer:
A How fast does a skateboard move at the bottom of a ramp?
Explanation:
How fast does a skateboard move at the bottom of a ramp is a scientific question about skateboarding.
'A' is the only one that can be tested and measured.
'B' and 'D' ask for 'best'. 'C' asks 'should'. These are things that can't be measured, and they're individual opinions anyway.
Explain reflection and refraction
In a shopping mall, two elevators pass each other moving in opposite directions. Each elevator is moving at the same speed. The relative velocity of one elevator to another is 10 m/s. what is the velocity of each elevator to a person standing on the ground?
Answer:
5 m/s upward and 5 m/s downward
Explanation:
Let's call v the speed of each elevator. So one elevator is moving with velocity +v relative to the ground (the positive sign indicates the upward direction) and the other one with velocity -v relative to the ground (downward direction).
The relative velocity of one elevator to another is 10 m/s, so we can write:
[tex]+v = -v + 10[/tex]
which means
[tex]+2v=10\\v = 5 m/s[/tex]
So the speed of each elevator relative to the ground is 5 m/s, with one moving upward and the other one moving downward.
A spectroscope creates a spectrum, or array of colors, based on the light emitted by a star. How are
scientists able to use these colors to determine which elements the star contains?
QUESTION 4
What would be the BEST response to constructive criticism?
Tell others about that person's faults.
Calmly walk away from the person.
Make the discussion more fair by telling the person about his or her faults.
Evaluate the criticism for truthfulness, then talk about it without being defensive.
QUESTION 5
What key ingredients promote effective collaboration when working with a team of people?
asking questions, making assumptions, and helping others
honesty, openness, consistency, and respect
valuing diversity, addressing hate crimes, and reading
communicating passively, scheduling, and leading
Pressure of gas is 13.6 cm of hg what does it means
Explanation:
13 cmHg (centimeters of mercury) is the pressure at the bottom of a column of mercury 13 cm deep. It is the equivalent of about 17.3 kPa or 2.5 psi.
what is Linkedin and how you can look for jobs and network with others in your career field?
Answer:
LinkedIn is a social community, or social network where connections are created between employers and employees.
A typical user creates an account, fill in their employment history, achievements and personal goals, and starts making contact with people that work in similar fields and could offer potential job opportunities.
LinkedIn is a popular tool for people looking to find jobs and new positions. You talk to people in your chosen career field, in different geographic areas, and once they look at the profile you have created, you could become a potential candidate for a job offer.
A random sample of 10 of the 2005 Nextel Cup NASCAR drivers produced the following ages: 33, 48, 41, 29, 40, 48, 44, 42, 49, 28. a. Find the mean age for the 10 NASCAR drivers of the 2005 Nextel Cup. b. Find the median age for the 10 NASCAR drivers of the 2005 Nextel Cup. c. Find the midrange of age for the 10 NASCAR drivers of the 2005 Nextel Cup. d. Find the mode, if one exists, for age for the 10 NASCAR drivers of the 2005 Nextel Cup.
Answer:
Mean 40.2Median 41.5Mid-range 38.5Mode 48Explanation:
Arrange the given data in increasing order
Given, 33, 48, 41, 29, 40, 48, 44, 42, 49, 28.
⇒28,29,33,40,41,42,44,48,48,49
⇒number of sample ,n, =10
⇒The mean is sum of sample÷number of samples
[tex]28+29+33+40+41+42+44+48+48+49=402\\\\\\\\n=10\\\\mean=\frac{402}{10} =40.2[/tex]
⇒Median is the center value in the data set
28,29,33,40,41,42,44,48,48,49---------In this case , median is half sum of 41 and 42
[tex]median=\frac{41+42}{2} =\frac{83}{2} =41.5[/tex]
⇒The mid-range is the mean of the sum of the least and greatest value
=(28+49)÷2 =77÷2=38.5
⇒Mode is the value that appears most in the data set
28,29,33,40,41,42,44,48,48,49-----------mode is 48
If A bar + B bar = C bar and magnitude of A bar + magnitude of B bar = magnitude of C bar. Then the angle between A bar and B bar is
A) 45°
B) 60°
C) 90°
D) 0°
Answer:
D) 0°
Explanation:
If vectors A and B add up to vector C, then vector C must start where A starts and end where B ends.
Since we also know the magnitudes of A and B add up to the magnitude of C, then A, B, and C must be inline with each other.
Therefore, the angle between A and B is 0°.
A cubical wooden box floating on water rises 1cm when 400 gm of stone is
removed from it. What will be volume of this box?
Answer:
Explanation:
I'm not sure you can do this without just a bit more information. I can tell you what the mass of the water is when the rocks are removed. When we know that, we know the volume of the water that was displaced. whether or not this is enough information to determine the volume of the box, I'm not sure.
400 grams raises the box 1 cm.
The density of water = 1 gm / cm^3
400 grams of water = 400 mL or 400 cm^3
The volume of the displaced water = 400 cm^3
The volume a slice from the square prism is B*h
B = 400 cm^2
h = 1 cm
If the base is 400 cm^2 then each side is
s^2 = 400
sqrt(s^2)= sqrt(400)
s = 20
The volume of the box is 20^3 = 8000 cm^3
I NEED PHYSICS HELP? THE QUESTION IS IN THE PIC
Speed of the block at the bottom of the incline: 5.42 m/s
The first part of the problem can be solved by using the law of conservation of energy. Since the ramp is frictionless, the initial gravitational potential energy of the block at the top of the ramp is converted into kinetic energy at the bottom:
[tex]mgh = \frac{1}{2}mv^2[/tex] (1)
where
m is the mass of the block
g = 9.8 m/s^2 is the acceleration of gravity
h is the initial height of the block
v is the speed of the block at the bottom
The initial height of the block is equal to the height of the ramp, so
[tex]h=L sin \theta[/tex] (2)
where
L = 3.00 m is the length of the ramp
[tex]\theta=30^{\circ}[/tex] is the angle of the ramp
Substituting (2) into (1) and re-arranging the equation, we find the speed
[tex]2gL sin \theta = v^2[/tex]
[tex]v=\sqrt{2gL sin \theta}=\sqrt{2(9.8)(3.00)sin 30^{\circ}}=5.42 m/s[/tex]
Coefficient of kinetic friction between the floor and the block: 0.3
In the second part of the motion, the block is slowed down by friction along the flat surface. According to the work-energy theorem, the work done by friction is equal to the change in kinetic energy of the block:
[tex]W=\Delta K=K_f -K_i[/tex]
where
W is the work done by friction
Kf is the final kinetic energy of the block, which is zero since the block comes to rest
[tex]K_i = \frac{1}{2}mv^2[/tex] is the initial kinetic energy of the block, where
m = 10.0 kg is the mass of the block
v = 5.42 m/s is its initial speed
Substituting into the equation, we find
[tex]W=-\frac{1}{2}mv^2=-\frac{1}{2}(10.0)(5.42)^2=-146.9 J[/tex]
and the work is negative, since the direction of the force of friction is opposite to the direction of motion of the block.
Now we can rewrite the work as the product between the force of friction and the displacement of the block:
[tex]W=-F_f d = - \mu mg d[/tex]
where
[tex]\mu[/tex] is the coefficient of friction
d = 5.00 m is the displacement of the block
Solving for [tex]\mu[/tex],
[tex]\mu = - \frac{W}{mgd}=-\frac{-146.9}{(10.0)(9.8)(5.00)}=0.3[/tex]