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Alenkinab [10]
3 years ago
14

What is the difference between speed and velocity?

Physics
1 answer:
alekssr [168]3 years ago
4 0
Speed does not include a direction, but velocity does.

       30 miles per hour north
and
       30 miles per hour west

Same speed.
Different velocity.
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(a) Assume an electron in the ground state of the hydrogen atom moves at an average speed of 5.00 × 106 m/s. If the speed is kno
Sonbull [250]

Answer:

The minimum uncertainty in its position is 1.1587 nm

Explanation:

Given;

average speed of electron, v = 5.00 × 10⁶ m/s

percentage of speed uncertainty = 1%

Δv = 0.01( 5.00 × 10⁶ m/s) = 5.00 × 10⁴ m/s

Applying Heisenberg's uncertainty principle, to determine the uncertainty in its position.

ΔxΔP ≥ h/4π

Δx(mΔv)  ≥ h/4π

Δx = h/4πmΔv

where;

Δx is uncertainty in its position

h is Planck's constant

m is mass of electron

Δx ≥ \frac{6.626 *10^{-34}}{4\pi *9.1*10^{-31}*5*10^4} = 1.1587*10^{-9} \ m

Δx ≥ 1.1587 nm

Therefore, the minimum uncertainty in its position is 1.1587 nm

4 0
3 years ago
3V battery is used with a 15 ohm resistance.What is the current?
Pavlova-9 [17]

Answer:

0.2 A

Explanation:

V= IR

3 = I × 15

I = 3/15

= 1/5 = 0.2 A

5 0
2 years ago
An object that is speeding up is accelerating.<br> True<br> False
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True. The speed of any object will have faster acceleration, and eventually slow down due to gravity.
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Gravity ? that is possibly the answer
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Usually, the forces that start the oscillation of buildings are the wind and microearthquakes.
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