How was Bohr's atomic model different from those of previous scientists?

Answers

Answer 1

Answer:

Answer:Bohr placed the electrons in distinct energy levels. Rutherford described the atom as consisting of a tiny positive mass surrounded by a cloud of negative electrons. Bohr thought that electrons orbited the nucleus in quantised orbits.

Explanation: also rutherfords was just a hypothesis while Bhor took the time to make his an experiment

Related Questions

The diagram shows the path of a pendulum bob that has been released.Which describes the kinetic energy of the pendulum bob? A. It increases as it travels from its maximum amplitude to its resting point. B. It decreases as it travels from its maximum amplitude to its resting point. C. It remains the same throughout the period. D. It decreases at the arm, but increases at the pivot point
A child is sending pulses down a stretched rope at a rate of 2 pulses per second. The distance between the pulses is 5 meters. What is the speed of the wave?a. 5 m/s c. 2 Hz b. 10 m/s d. 2.5 m/s User: Longitudinal seismic waves are known as a. primary waves. b. secondary waves. c. surface waves. d. transverse waves.
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a student drops an object from the top of a building which is 19.6 m high. How long does it take the object to fall to the ground?
Statement. H,, and are distinct points that are coplanar.

A boy is running with kinetic energy of 810j if the boy has a mass of 80kg what is his peed

Answers

KE=(1/2)mv² ⇒ v=√(2KE/m)

Data:
KE=kenetic energy=810 J
m=mass=80 Kg
v=velocity (speed)

v=√(2KE/m)
v=√(2*810 J/80 Kg)=4.5 m/s.

answer: his speed is 4.5 m/s.

A+block+of+1.2kg+is+placed+on+an+included+plane+at+60°+to+the+horizontal.+Calculate.+a.The+force+that+will+make+the+block+to+slide+down+the+plane.B.The+coefficient+of+friction+.C.+The+normal+reaction+d.+The+friction+force

Answers

Answer:

a. 10.2 N b. 1.73 c. 58.8 N d. 10.2 N

Explanation:

a. The force that will make the block slide down the plane

This is the component of the block's weight along the plane F = mgsinθ where m = mass of block = 1.2 kg, g = 9.8 m/s² and θ = angle of incline = 60°.

So, F = mgsinθ = 1.2 kg × 9.8 m/s² × sin60°.= 10.18 N ≅ 10.2 N

b. The coefficient of friction

The coefficient of friction, μ = tanθ = tan60° = 1.73

c. The normal reaction.

This is equal to the vertical component of the block's weight. So, F = mgcosθ. Substituting the values for the variables from above, we have

F = mgcosθ = 1.2 kg × 9.8 m/s² × cos60°.= 58.8 N

d. The frictional force

Since the block does not slide, there is no net force on it. If f is the frictional force, then

F - f = ma. Since a = acceleration = 0,

F - f = 0

f = F = mgsinθ = 1.2 kg × 9.8 m/s² × sin60°.= 10.18 N ≅ 10.2 N

Currently, is our planet an open or closed system?

Answers

Our planet is closed system because there is a limit of how much matter could be exchanged.

You are on roller blades on top of a small hill. Your potential energy is equal to 1,000.0 joules. The last time you checked your mass was 60.0 kilograms.
a. What is your weight in newtons?
b. What is the height of the hill?
c. If you start skating down this hill, your potential energy will be converted to kinetic energy. At the
bottom of the hill, your kinetic energy will be equal to your potential energy at the top. What will be
your speed at the bottom of the hill?

Answers

a) The weight of a person is given by:
$W=mg$
where m is the mass of the person and g is the gravitational acceleration. In this problem, the mass of the person is m=60.0 kg, while the value of g is $g=9.81 m/s^2$ , therefore the weight of the person is
$W=(60 kg)(9.81 m/s^2)=588.6 N$

b) The gravitational potential energy at the top of the hill is U=1000 J. The potential energy is also given by the product between the weight W and the height of the hill h:
$U=Wh$
If we rearrange the equation, we can calculate the height of the hill, h:
$h= (U)/(W) = (1000 J)/(588.6 N) =1.70 m$

c) At the bottom of the hill, all the potential energy at the top of the hill has converted into kinetic energy:
$U=K$
$U= (1)/(2) mv^2$
where m is the mass and v is the speed. If we rearrange the formula, we can calculate the speed at the bottom of the hill:
$v=\sqrt{(2U)/(m)}=\sqrt{(2\cdot 1000 J)/(60.0 kg)}=5.8 m/s$

Ideally, rewards should be given immediately and frequently buta. only from an instructor or supervisor.
b. in moderate amounts.
c. without a specific timeline.
d. shouldn’t match your personal tastes.

Answers

The correct answer for the question that is being presented above is this one: "a. only from an instructor or supervisor." Ideally, rewards should be given immediately and frequently but only from an instructor or supervisor to show authority.

Which statement is true?Select one:
O a. Social media is not a reason some people have negative attitudes
towards their bodies.
O b. Physical fitness is a fad.
O c. You must be an athlete to be physically fit.
Od. Heredity does not control your ability to participate.

Answers

Answer:

A, I think, hope this helps!

Answer:

i think d because some people are talented even though they are suffering

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