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joja [24]
4 years ago
6

Which sentence is an example of how a scientist might use a model?

Physics
2 answers:
DedPeter [7]4 years ago
8 0

nvm yeah its prob the marble one

djverab [1.8K]4 years ago
3 0

Answer:

Marbles placed inside a hollow sphere are used to describe protons in a nucleus.

Explanation:

You might be interested in
Which is moving faster a car traveling 150 km in 3 hours or one traveling 100 km in 2 hours?
ki77a [65]
Neither they’re both moving the same . 150/3 = 50km
100/2 = 50km
therefor they’re traveling at the same rate.
7 0
3 years ago
An AC voltage source has an output of ∆V = 160.0 sin(495t) Volts. Calculate the RMS voltage. Tries 0/20 What is the frequency of
kupik [55]

Answer:

RMS voltage is 113.1370 V

frequency is 780.685 Hz

voltage is −158.66942 V

maximum current is  2.9739 A

Explanation:

Given data

∆V = 160.0 sin(495t) Volts

so Vmax = 160

and angular frequency = 495

time t = 1/106 s

resistor R = 53.8 Ω

to find out

RMS voltage and frequency of the source and  voltage  and maximum current

solution

we know voltage equation = Vmax sin ωt

here Vmax is 160 as given equation in question

so RMS will be Vmax / √2

RMS voltage = 160/ √2

RMS voltage is 113.1370 V

and frequency = angular frequency / 2π

so frequency = 497 / 2π

frequency is 780.685 Hz

voltage at time (1/106) s

V(t) = 160.0 sin(495/ 108)

voltage = −158.66942 V

so current from ohm law at resistor R 53.8 Ω

maximum current = voltage max / resistor

maximum current =  160 / 53.8

maximum current =  2.9739 A

8 0
3 years ago
2. Who bombarded molybdenum with atomic number (Z=42) with fast moving<br>neutrons?<br>​
Dominik [7]

Answer:

This question appears incomplete

Explanation:

This question appears incomplete, however Molybdenum-99 (⁹⁹Mo) is produced by bombarding Molybdenum-98 (⁹⁸Mo) with fast moving neutrons (¹₀n) as shown below

⁹⁸₄₂Mo + ¹₀n ⇒  ⁹⁹₄₂Mo + ⁰₀γ

This reaction is a nuclear caption reaction (which occurs in a nuclear reactor) for the production of Molybdenum-99 (⁹⁹Mo) which serves as a "precursor" for the production of medically viable/ Clinical Grade Technutium-99m (⁹⁹Tc) through Ion-exchange technique.

3 0
4 years ago
The gravitational field strength on earth is 10n/kg. find the weight of an object of mass 25kg​
vodka [1.7K]

Answer:

250N

Explanation:

weight = Mass(in kg) × Gravitational field strength

25 × 10 = 250N

6 0
3 years ago
Read 2 more answers
Please help meeee
Mashutka [201]

Answer:

whichever teacher gave you this question is a legend

Explanation:

8 0
3 years ago
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