The stratospheric chemical that prevents much of the solar ultraviolet radiation from penetrating to earth's surface is:

An electron and a proton are confined in the same space. For what particle would a measurement of the speed have a greater uncer

Lena [83]

<span>The electron is a subatomic particle, symbol e− or β−, with a negative elementary electric charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure. The electron has a mass that is approximately 1/1836 that of the proton. Quantum mechanical properties of the electron include an intrinsic angular momentum of a half-integer value in units of ħ, which means that it is a fermion. Being fermions, no two electrons can occupy the same quantum state, in accordance with the Pauli exclusion principle. Like all matter, electrons have properties of both particles and waves, and so can collide with other particles and can be diffracted like light. The wave properties of electrons are easier to observe with experiments than those of other particles like neutrons and protons because electrons have a lower mass and hence a higher De Broglie wavelength for typical energies. Hope this HELPS :D</span>

3 0

3 years ago

A uniform 4.4 t magnetic field points north. if an electron moves vertically downward (toward the ground) with a speed of 2.5 ×

Reil [10]

Answer:

$1.8\cdot 10^{-11} N$

Explanation:

The force acting on the electron due to the magnetic field is

$F=qvB sin \theta$

where

$q=1.6\cdot 10^{-19} C$ is the charge of the electron

$v=2.5\cdot 10^7 m/s$ is its speed

$B=4.4 T$ is the intensity of the magnetic field

$\theta=90^{\circ}$ is the angle between the direction of the field and the velocity of the electron

Substituting all the numbers into the equation, we find

$F=(1.6\cdot 10^{-19}C)(2.5\cdot 10^7 m/s)(4.4 T) sin 90^{\circ}=1.8\cdot 10^{-11} N$

8 0

4 years ago

When a car traveling at 30m/s hits the gas pedal up to 65m/s in 3.5 sec what is the cars acceleration during that time

Blababa [14]

Answer:

d

Explanation:

4 0

3 years ago

Which of the following are clues that a chemical reaction may have taken place?

bixtya [17]

its d: mass increase

7 0

4 years ago

Read 2 more answers

A small mass m slides with negligible friction down an incline at an angle of 25.76° with respect to the horizontal. It then dro

Lunna [17]

• The speed change between T and S is greater between S and R.

• The speed of m at X is greater that at Q.

• The size of the total force on m at P is less at U.

• The mechanical energy of m at P is equal to that at V.

• The size of the total force on m at S is greater at P.

• The velocity of m at X is equal to that at V.

<h3>What is mechanical energy?</h3>

The mechanical energy is the sum of kinetic energy and the potential energy of an object at any instant of time.

M.E = KE +PE

Given is a small mass m slides with negligible friction down an incline at an angle of 25.76° with respect to the horizontal. It then drops down to a horizontal surface and bounces elastically back up as shown.

The picture shows the position of the mass at equal time intervals starting from rest at T. The height of the mass at X is the same as at V.

Between T to S and S to R, the mass is under constant acceleration. Time taken to move from T to S is greater than S to R. Thus, the speed change between T and S is greater than between S and R.

At Q, there is only a horizontal velocity component, but at X. the speed will be greater and has both vertical and horizontal component. Thus, the speed of m at X is greater than that at Q.

Force is given as the rate of change of momentum with time. At U, change in momentum is large compared to P. Thus, the size of the total force on m at P is less at U.

There is no friction acting on the system. So the energy remains conserved. Mechanical energy at P = V.

The force on mass m at S is only the gravity force. The remaining forces are cancelled by the normal force. Thus, size of the total force on m at S is greater at P.

The energy is conserved at each point of motion of mass. If X and V are at same height, they have same potential energy and so their kinetic energy. Thus, velocity of m at X is equal to that at V.

Learn more about mechanical energy.

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5 0

2 years ago