Two spherical beads (charged equally, with each one weighing 8.10 g) are put 3.90 cm away from each other. If they are let go and begin to accelerate at 140. m/s2, what would be the magnitude of the charge on each bead?
There’s a Haworth Office Cublicle at my job and the desk is help up by a Cantilever, I’m trying to adjust the height of the desk and there are no visible screws to try to take it out and when I try to lift it out the whole desk system seems to come apart with it. How do I take the cantilever out in the first place and can I do it without have to...
show more
A pitcher claims he can throw a baseball with as much momentum as a 6.9 g bullet moving with a speed of 4500 m/s. A baseball has a mass of 0.221 kg.
What must be its speed if the pitcher’s claim is valid?
Answer in units of m/s.
High-speed stroboscopic photographs show that the head of a 188 g golf club is trav- eling at 30.7 m/s just before it strikes a 45.9 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 19.7 m/s.
Find the speed of the golf ball immediately after impact.
Answer in units of m/s.
Assuming that the balls slide on a friction- less surface and all collisions are head-on, find the final speed of the blue ball in each of the following situations:
a) The green ball stops moving after it strikes the blue ball.
Answer in units of m/s.
b) The green ball continues moving after the collision at 2.1 m/s in the same direction.
Answer in...
show more
propanol and a potassium dichromate reagent react to make propanal. This is considered an oxidation reaction, but what happens in the reaction to clarify as that?
Does it have to do with the electron transfer?
for the compound of interest. if you did not know the wavelength of maximum absorbance for a given compound, explain how it could be determined experimentally????
Sylvester is pushing a broken snow thrower (m = 24.5 kg across a parking lot with a force of 351 N [F15.0°D]. If the coefficient of kinetic friction between the snow thrower and the ground is uk = 0.36, determine how fast it would be travelling after it moves 12.6 m if it was initially at rest.
Solution 1 contains one mole of ethanol for each mole of dichromate
solution 2 contains three moles of ethanol for each mole of dichromate
q1) what colour would you expect solution 1 to be? why?
q2) what colour would you expect solution 2 to be? why?