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Allisa [31]
3 years ago
5

Two forces act on an object. The first force has a magnitude of 15.0 N and is oriented 78.0 ° counterclockwise from the + x ‑axi

s, whereas the second force has x ‑ and y ‑components ( − 21.0 N , 18.5 N ) . Express the magnitude and direction of the net force.
Physics
1 answer:
bezimeni [28]3 years ago
4 0

Answer:

c

Explanation:

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Strontium has density of 2.64 g/cm3 and crystallizes with the face-centered cubic unit cell. Calculate the radius of a strontium
pantera1 [17]

Answer:

The radius of strontium atom is

2.14 E-8cm

Explanation:

Go through the attached file for a comprehensive detailed explanation.

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3 years ago
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4 years ago
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Temka [501]

Answer:

C

Explanation:

Most probable exchange of ions occurs for option C.

3 0
3 years ago
A cheetah can accelerate at 4.5 m/s from rest to a speed of 30.0 m/s. Calculatethe distance
anzhelika [568]

Answer:

d= 100m

Explanation:

Cheetah kinematic

The cheetah moves with uniformly accelerated movement, and the formulas that describe this movement are:

d= v₀*t + (1/2)*a*t²  Formula (1)

vf²=v₀²+2*a*d Formula (2)

vf=v₀+a*t  Formula (3)

Where:

d:distance in meters (m)  

v₀: initial speed in m/s  

vf: final speed in m/s  

a: acceleration in m/s²  

t: time in seconds (s)

Known Data

v₀ =0

a =  4.5 m/s²

vf= 30 m/s.

Problem development

We apply the formula (2) that has known data to calculate the distance :

vf²=v₀²+2*a*d

(30)²= 0 + 2*  4.5* d

d= \frac{900}{9}

d= 100m

8 0
3 years ago
.
sergij07 [2.7K]

Based on the nature of constructive interference,

none of the wave intersections will produce constructive interference.

<h3>What is constructive interference?</h3>

Constructive interference is interference that occurs when two waves of the same frequency amplitude and wavelength travelling in the same direction are superposed with the resultant effect of reinforcement of both waves to produce a larger wave.

Constructive interference occurs when the path difference between two identical waves at a point is:

  • delta s = n × wavelength

where n = 0, 1, 2, ...

For the various intersections:

  • 1.77 cm crest intersecting with a 0.65 cm crest; n = 1.77/0.65 = 2.7
  • A 1.2 mm crest intersecting with a 3.9 mm trough is destructive.
  • A 4.55 N trough intersecting with a 1.59 N trough; n = 4.55/1.59 = 2.8
  • A 0.44 inch trough intersecting with a 0.72 inch crest is destructive.
  • A 7.42 mm trough intersecting with a 1.93 mm trough; n = 7.42/1.93 = 3.8

Therefore, none of the wave intersections will produce constructive interference

Learn more about constructive interference at: brainly.com/question/1040831

4 0
2 years ago
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