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Questions and answers by
shaknocka
Questions (30)
depict the following dilutions series:
1:4 1:16 1:64 IN A FINAL VOLUME OF 200ML
0 answers
338 views
The vertical surface of a reservoir dam that is in contact with the water is 200 m wide and 14 m high. The air pressure is one
2 answers
1,370 views
At a fabrication plant, a hot metal forging has a mass of 78.5 kg and a specific heat capacity of 426 J/(kg C°). To harden it,
0 answers
565 views
The bulk modulus of water is B = 2.2 x 109 N/m2. What change in pressure ÄP (in atmospheres) is required to keep water from
0 answers
825 views
A solid aluminum sphere has a radius of 2.28 m and a temperature of 89.1 °C. The sphere is then completely immersed in a pool
0 answers
507 views
A solid aluminum sphere has a radius of 2.28 m and a temperature of 89.1 °C. The sphere is then completely immersed in a pool
0 answers
487 views
During an all-night cram session, a student heats up a 0.420 liter (0.420 x 10- 3 m3) glass (Pyrex) beaker of cold coffee.
0 answers
876 views
A lead sphere has a diameter that is 0.050% larger than the inner diameter of a steel ring when each has a temperature of 27.9
0 answers
894 views
A 71.9-kg skier coasts up a snow-covered hill that makes an angle of 27.5 ° with the horizontal. The initial speed of the skier
0 answers
812 views
Starting at the top of a steep, icy track, a rider jumps onto a sled (known as a skeleton) and proceeds - belly down and head
2 answers
1,109 views
A 48.9-g golf ball is driven from the tee with an initial speed of 45.4 m/s and rises to a height of 29.9 m. (a) Neglect air
0 answers
482 views
A 48.9-g golf ball is driven from the tee with an initial speed of 45.4 m/s and rises to a height of 29.9 m. (a) Neglect air
0 answers
454 views
A slingshot fires a pebble from the top of a building at a speed of 16.0 m/s. The building is 32.0 m tall. Ignoring air
0 answers
1,372 views
It takes 214 kJ of work to accelerate a car from 23.1 m/s to 29.3 m/s. What is the car's mass?
1 answer
359 views
An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid
2 answers
1,638 views
A rescue helicopter lifts a 85.2-kg person straight up by means of a cable. The person has an upward acceleration of 0.764 m/s2
0 answers
820 views
115 grams of KCl is dissolved in 750 ml of water. what are the molality, molarity, mole percent, % mass, ppm by mass. what would
4 answers
1,003 views
determine the amounts of solute and solvent needed to prepare the following solutions.
2.0 M aqueous NaCl solution 1.0 m aqueous
1 answer
900 views
why would it not be useful to just use pure ethanil or pure ethylene glycol as aN ANTIFREEZE SINCE THEIR NORMAL FREEZING POINTS
0 answers
451 views
calculate the necessary amounts of solutes and solvent to make a 4 liter bottle of antifreeze that will have a 35 degree change
0 answers
489 views
determine the amount of solute needed to make 100ml aqueous solution of NaCl and MgCl2 that will cause a 10 degree change in
0 answers
634 views
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fall halfway
1 answer
807 views
A dynamite blast at a quarry launches a rock straight upward, and 2.0 s later it is rising at a rate of 15 m/s. Assuming air
3 answers
1,254 views
A Boeing 747 "Jumbo Jet" has a length of 59.7 m. The runway on which the plane lands intersects another runway. The width of the
1 answer
791 views
A Boeing 747 "Jumbo Jet" has a length of 59.7 m. The runway on which the plane lands intersects another runway. The width of the
1 answer
830 views
A speedboat starts from rest and accelerates at +1.69 m/s2 for 7.18 s. At the end of this time, the boat continues for an
2 answers
660 views
A cheetah is hunting. Its prey runs for 4.3 s at a constant velocity of +8.4 m/s. Starting from rest, what constant acceleration
1 answer
2,300 views
A woman and her dog are out for a morning run to the river, which is located 3.51 km away. The woman runs at 3.48 m/s in a
1 answer
680 views
A spelunker (cave explorer) drops a stone from rest into a hole. The speed of sound is 343 m/s in air, and the sound of the
1 answer
5,758 views
While standing on a bridge 18.5 m above the ground, you drop a stone from rest. When the stone has fallen 2.80 m, you throw a
1 answer
661 views
Answers (6)
i found that part a) is 45.1 m/s but i don't kno how to find part b)
force will be -7.007E11/1.9E6 then?
how do i find the velocity 4.2s after lunch
i found the the speed for (a) of when it was launch.. i calculate it from the formula .. v(t)= V+g(t) V=15+9.8(2)=34.6 but how do i calculate it for (b) i tried plugging in 4.2 but i didn't work
i got the right answer right for acceleration ... to find the total displacement i did 8.75 times 20.11 but its not the right answer
i put that water neeed to be mix to lower the freezing point temp and not to damage the radiator
