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keitanako
Questions and answers by visitors named
keitanako
Questions (35)
Put the following in order from earliest to latest. In doing so, assume that the Nice model occurred as described and that the
4 answers
asked by
keitanako
1,759 views
A 108 mL gas sample has a mass of 77.96 mg at a pressure of 1140 mmHg and a temperature of 183 °C. Assume ideal gas behavior
5 answers
asked by
keitanako
6,590 views
Rank the following hypothetical planets -- all of which have the same total mass and same radius -- from lowest moment of
5 answers
2,572 views
A meteorite of mass 1*10^4kg is approaching head-on a planet of mass 5*10^29kg and radius 5*10^4km. Assume that the meteorite is
5 answers
1,157 views
Two skaters of mass m1=50kg and m2=70kg are standing motionless on a horizontal ice surface. They are initially a distance L=7.0
4 answers
1,410 views
A small object of mass m= 90 kg slides down a spherical dome of radius R=12 m without any friction. It starts off at the top
3 answers
464 views
A small ball of mass m=0.60 kg hangs from a massless string of length l=0.9 m. The ball travels in a vertical circle and its
2 answers
488 views
An airliner makes an emergency landing with its nose wheel locked in a position perpendicular to its normal rolling position.
6 answers
550 views
A block of mass m = 2 kg on a horizontal surface is connected to a spring connected to a wall (see figure). The spring has a
3 answers
644 views
An object of mass m=80 kg moves in one dimension subject to the potential energy
U(x)=(λ/4)(x^2-a^2)^2+(b/2)x^2 Here we use
1 answer
457 views
Star Right Ascension Declination
Aldebaran 4h 36m 16¢X 31' Miaplacidus 9h 13m -69¢X 42' Deneb 20h 41m 45¢X 20' Regulus 10h 08m
4 answers
778 views
1. Imagine that the Earth¡¦s spin were to be reversed, so that the planet rotated about its axis from East to West, at the
2 answers
545 views
A ruler stands vertically against a wall. It is given a tiny impulse at θ=0∘ such that it starts falling down under the
2 answers
473 views
A person of mass m2= 85.0 kg is standing on a rung, one third of the way up a ladder of length d= 3.0 m. The mass of the ladder
3 answers
695 views
A stick of length l = 65.0 cm rests against a wall. The coefficient of static friction between stick and the wall and between
2 answers
604 views
1. Sun-grazing comet ISON disintegrated on November, 2013. Observation of the comet suggested an elliptical orbit with period
1 answer
434 views
In fact, more precise calculations suggest that ISON was on a hyperbolic, unbound orbit. How much more precise?
Find the minimal
1 answer
338 views
A possible trajectory for sending a spacecraft to Mars is an elliptical orbit with Earth at its perihelion and Mars at its
1 answer
459 views
For an object of mass m in a circular orbit of radius R under the gravitational influence of a center of mass M, find an
1 answer
379 views
1. In this collection of problems we will try to use what we have learned to see what information about a hypothetical Solar
3 answers
423 views
1. At opposition, Nursat(is observed to be in opposition every 374 days.) is observed to subtend an angular radius of 7.1523
1 answer
484 views
The volume of a ball is given in terms of its radius by V=(4*pi/3)*R^3. Use this to find the average density of Nursat, i.e. the
1 answer
384 views
1. Consider an asteroid of radius 2 km and density 2,500 kg/m^3 impacting the Earth. When it collides with the surface its
2 answers
612 views
Consider dropping a Professor with an estimated mass of 80 kg from a safe, large distance, onto a SMBH with a mass of
1 answer
393 views
2C3H6(g) + 2NH3(g) + 3O2(g) -> 2C3H3N(g) + 6H2O(g)
A 150.0 liter steel reactor at 25 ºC is filled with the following partial
2 answers
1,094 views
2NaN3(s) -> 2Na(s) + 3N2(g)
What mass of sodium azide should be loaded in the device to ensure full inflation of the same air bag
4 answers
1,556 views
A 10.00 gram solid sample consisting of a mixture of sodium chloride and potassium sulfate is dissolved in 100.0 mL of water is
5 answers
3,940 views
Last week we drew Lewis dot structures of azide (N31-), a crucial component in automobile collision safety airbags. During an
2 answers
844 views
The highest point in the scatter is the point for Illinois, at 1807. The two just below it, at 1778 and 1777, are for Minnesota
5 answers
531 views
Another star cluster ("star cluster 2") lies 7.4 Mega-parsecs from the starship, and has an apparent radius of 6.3 arc seconds.
4 answers
1,386 views
Before Dark Energy could be discovered, several preconditions needed to be in place. Tick all the factors below which were
1 answer
467 views
Imagine that you live in a distant galaxy far far away. This galaxy is in a different universe, and so may have different
2 answers
734 views
How many DALYs are lost by a person who has a life expectancy of 74, contracts HIV/AIDS at the age of 40 and lives until the age
1 answer
975 views
Hydrogen accounts for 71% of the Sun's mass today. If only one tenth of that Hydrogen burns into Helium, how long could the Sun
4 answers
1,353 views
If the planet is in an edge-on orbit, what would its mass be (in kg)?
3 answers
469 views
Answers (6)
unanswered
the answer is wrong...
Thank you, I know how to do it.
Hi, Bob. But how to get (MMPbCl2/2*MMNaCl) and (MMPbSO4/MMK2SO4). Because it is confusing to me. Can you show the step more clearly. Thank you? I just can do step 1, which is X=10-Y. But step 2, it is bit confused. I can't get the meaning.
Sorry, I have forgotten to give the information. This question has part a, which is "What mass of sodium azide must be completely reacted to inflate an air bag to 65.0 liters at 20.0 ºC and 1.06 atm?" Please help me because I have calculated many time,
After finding f_x, use that value in the equation Torque=I_cm *alpha equation (containing F_y and F_x), i think you don't need to find a_y. May I ask how to apply to the equation, please?