A police car is traveling at a velocity of 18.0 m/s due north, when a car zooms by at a constant velocity of 42.0 m/s due north. After a reaction time of 0.800 s the policeman begins to pursue the speeder with an acceleration of 5.00 m/s2. Including the reaction time, how long does it take for the police car to catch up with the speeder?
Answers
Answer:
t = 10.4 s
Explanation:
given,
velocity of the police car = 18 m/s
reaction time of policeman = 0.8 s
acceleration of the policeman to catch up the speeder = 5 m/s²
time taken to catch the speeder be t₁
distance traveled by the police and the speeder will be same
t₁ = 9.6 s
total time taken by the policeman
= reaction time + t₁
= 0.8 + 9.6
t = 10.4 s
Total time taken by the policeman to catch the speeder is 10.4 s
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b. False
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both travel with you wherever you go, and don't depend on where you are.
Answers
The correct answer is:
Alpha particles bouncing off gold foil
Explanation:
The nuclear model. Atoms contain three sub-atomic particles termed protons, neutrons, and electrons. The protons and neutrons are determined in the nucleus at the center of the atom. The nucleus is surprisingly much less than the atom as a whole. The Rutherford Gold Foil Experiment conceded the first empirical confirmation that guided to the development of the nucleus of the atom as a small, dense, and positively charged atomic core.
The nuclear model of atom was given by Rutherford. As per this model,the central part of every atom is a massive positive core, and it occupies the total mass of the atom .Around the nucleus, there are orbits in which electrons are revolving just like planets are revolving around the sun.
This evidence was provided by Rutherford's gold foil experiment.
As per this experiment, some alpha particles were deviated at an angle less than 90 degree when allowed to fall on a gold foil.Some alpha particles were deviated more than 90 degree.
One alpha particle out of 10000 particles directly retraced its path back i.e it was deviated at angle of 180 degree.
It is so because alpha particle is positively charged. The alpha particle will be deviated if it will suffer a repulsive force. Hence, the central part of atom is positively charged. As alpha particle comes back, it means the central part is very massive.
Neon gas
Arrange the substances in the table from the MOST to the LEAST ordered particle arrangement
A)
wood, water, neon gas
B)
wood, neon gas, water
water, wood, neon gas
D
water, neon gas, wood
Answers
Answer:
I think the correct answer from the choices listed above is option A. The correct arrangement of the substances according to the most to the least ordered particle arrangement should be wood, water and neon gas. Wood should be the first since it is solid which has the most ordered structure as compared to the liquid and a gas. The neon gas is the last since as a gas it has the least ordered structure.
Answer:
A) wood, water, neon gas
Explanation:
wood, water, neon gas.
The particles of solids have an arrangement that is highly ordered and regular. Liquids have an arrangement that is less ordered, and the particle arrangement in gases is the least ordered and regular of the three states of matter.
tell me if im wrong .... hope this helps :)