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3 years ago

5

Based on its position in the periodic table of the elements, how many valence electrons does phosphorus (atomic number 15) have?

2 answers:

nekit [7.7K]3 years ago

8 0

Answer:

5 Valence electrons

Explanation:

Komok [63]3 years ago

5 0

Answer:

5 Valence electrons

Explanation:

Hope this will help

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________ reaction time involves selecting a specific and correct response from several choices when presented with several diffe

Sav [38]

Answer: Complex

Explanation: Complex reaction time is a reaction time where subjects are expected to present their reports after consideration of different correct choices from several responses and from different stimuli. It involves a series stimuli and responses before correct choices can be made. Complex reaction time is always longer than other reaction times due to the level of activities and stimuli involved.

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3 years ago

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The average speed of a car that travels a distance of 240 km is three hours

dangina [55]

Answer:

80km/h

Explanation:

Average speed = distance/time

Given

Distance = 240km

Time = 3 hours

speed = 240km/3hrs

= 80km/h

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4 years ago

The wall of a large room is covered with acoustic tile in which small holes are drilled 4.6 mm from center to center. How far ca

Zielflug [23.3K]

Answer:

L= 27.42m

Explanation:

We have the variables

$D=4.6*10^{-3}m$

$d= 4*10^{-3}m$

$\lambda = 550*10^{-9}m$

Use the relation,

$L=\frac{D}{\theta_R} = \frac{D_d}{1.22\lambda}$

$L= \frac{(4.6*10^{-3}m)(4*10^{-3}m)}{1.22(550*10^{-9}m)}$

$L= 27.42m$

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4 years ago

Find the frequency of a spring block system if it is doing 4 oscillation in 100s

Paha777 [63]

Answer:

.004 Hz

Explanation:

Frequeny is cycles per second. An oscillation is 1 cycle

F=cycles/sec

4/100

=0.004Hz (Hz- Hertz=1 cycle/sec)

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3 years ago

Which of the following is true about this lever?

zysi [14]

As we can see here the lever has two forces at two ends

1. 300 N

2. 200 N

now we need to find the Torque on the lever about the fulcrum

so we will have

1. clockwise torque due to force at right end is

$\tau_1 = d_1F_1$

$\tau_1 = 6(200) = 1200 Nm$

2. counterclockwise torque due to force at left end

$\tau_2 = d_2F_2$

$\tau_2 = 1(300) = 300 Nm$

so as per above calculations we can see that net torque on the lever is clockwise as it has more torque in clockwise direction

so <u>it will rotate clockwise</u>

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3 years ago

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