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keitanako
Questions (35)
If the planet is in an edge-on orbit, what would its mass be (in kg)?
1 answer
503 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
1 answer
1,445 views
Put the following in order from earliest to latest. In doing so, assume that the Nice model occurred as described and that the
1 answer
1,923 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
0 answers
1,014 views
Rank the following hypothetical planets -- all of which have the same total mass and same radius -- from lowest moment of
2 answers
2,678 views
Imagine that you live in a distant galaxy far far away. This galaxy is in a different universe, and so may have different
1 answer
783 views
Before Dark Energy could be discovered, several preconditions needed to be in place. Tick all the factors below which were
1 answer
512 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.
1 answer
1,464 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
4 answers
586 views
Last week we drew Lewis dot structures of azide (N31-), a crucial component in automobile collision safety airbags. During an
1 answer
915 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
3 answers
4,029 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
2 answers
1,628 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
1 answer
1,145 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
2 answers
6,728 views
Consider dropping a Professor with an estimated mass of 80 kg from a safe, large distance, onto a SMBH with a mass of
0 answers
430 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
1 answer
654 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
0 answers
422 views
1. At opposition, Nursat(is observed to be in opposition every 374 days.) is observed to subtend an angular radius of 7.1523
0 answers
522 views
1. In this collection of problems we will try to use what we have learned to see what information about a hypothetical Solar
2 answers
473 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
0 answers
425 views
A possible trajectory for sending a spacecraft to Mars is an elliptical orbit with Earth at its perihelion and Mars at its
0 answers
506 views
In fact, more precise calculations suggest that ISON was on a hyperbolic, unbound orbit. How much more precise?
Find the minimal
0 answers
368 views
1. Sun-grazing comet ISON disintegrated on November, 2013. Observation of the comet suggested an elliptical orbit with period
1 answer
475 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
1 answer
661 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
2 answers
744 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
1 answer
518 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
1 answer
583 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
3 answers
836 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
505 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
2 answers
697 views
An airliner makes an emergency landing with its nose wheel locked in a position perpendicular to its normal rolling position.
5 answers
597 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
1 answer
537 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
2 answers
517 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
3 answers
1,461 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
4 answers
1,217 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?
