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3 years ago

1. What similarities do you notice

Physics

1 answer:

Anastasy [175]3 years ago

7 0

Answer:

1. What similarities do you notice

Within a group(column)?

Within a row (period)?

2. Locate the element in Period 4, Column 1.

Predict the number of valence electrons.

Predict the Lewis Dot Structure

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Freefalling object starts from rest after falling for six seconds what will be its velocity

const2013 [10]

Answer:

60m/s

Explanation:

since the object is falling under the influence of gravity, the formula is

v = u +gt

before the fall, the object is at rest then

u = 0m/s

v = 0 + 10×6 because acceleration due to gravity is g which is given as 10m/s2

therefore, v = 60m/s

7 0

3 years ago

If the range of the projectile is 4.3 m, the time-of-flight is T = 0.829 s, and air resistance is negligible, determine the foll

ankoles [38]

Answer

given,

range of the projectile = 4.3 m

time of flight = T = 0.829 s

$v =\dfrac{d}{T}$

$v =\dfrac{4.3}{0.829}$

v = 5.19 m/s

vertical component of velocity of projectile

v_y = gt'

$v_y = 9.8 \times {\dfrac{T}{2}}$

$v_y = 9.8 \times {\dfrac{0.829}{2}}$

$v_y =4.06\ m/s$

a) Launch angle

$\theta = tan^{-1}(\dfrac{v_y}{v})$

$\theta = tan^{-1}(\dfrac{4.06}{5.19})$

θ = 38°

b) initial speed of projectile

$v = \sqrt{v_x^2 + v_y^2}$

$v = \sqrt{5.19^2 + 4.06^2}$

v = 6.59 m/s

c) maximum height reached by the projectile

$y_{max}=v_{avg}t'$

$y_{max}=\dfrac{1}{2}v_y\dfrac{T}{2}$

$y_{max}=\dfrac{1}{2}\times(g\dfrac{T}{2})\times\dfrac{T}{2}$

$y_{max}=\dfrac{gT^2}{8}$

7 0

4 years ago

NUCLEAR POWER PRODUCES LESS TOXIC SULFUR THAN COAL BURNING ELECTRICITY TRUE OR FALSE

konstantin123 [22]

True because a nuclear power produces tons of high level radioactive waste that has to be disposed of carefully

8 0

3 years ago

Read 2 more answers

A normal human heart, beating about once per second, creates a maximum 4.00 mV 4.00 mV potential across 0.250 m 0.250 m of a per

ElenaW [278]

Answer:

1) maximum electric field strength = 0.016 V/m

2)maximum magnetic field strength = 5.33 x 10^(-11) T

3) wavelength = 3 x 10^(8)m

Explanation:

A) We are given;

Frequency (f) = 1 Hz

Maximum Potential ΔV = 4 mV = 4 x 10^(-3) V

Length; d = 0.25 m

Now, maximum potential formula is given as;

ΔV = E_o•d

Where E_o is maximum electric field strength.

Thus,

E_o= ΔV/d = (4 x 10^(-3))/0.25 = 0.016 V/m

B) The maximum magnetic field strength is given by;

B_o = E_o/c

Where;

c is speed of light = 3 x 10^(8)

B_o is maximum magnetic field strength

Thus,

B_o = 0.016/(3 x 10^(8)) = 5.33 x 10^(-11) T

C) Speed of any electromagnetic wave is given by;

c = fλ

Where;

f is frequency

λ is wavelength

c is speed of light = 3 x 10^(8)

Thus, making λ the subject,

λ = c/f

λ = (3 x 10^(8))/1 = 3 x 10^(8)m

8 0

4 years ago

Prove that density of 5l of water is 1000

atroni [7]

Density can be found when mass and volume is known. The density of 5 liter of water is 1000kg/m³.

<h3>What is density?</h3>

The density ρ of any substance is the ratio of mass m and its volume V.

ρ = m/V

Given is the mass of water as 5 kg and the volume is 5 liter.

as, 1 L = 10−³m³

So, 5 L = 5×10−³m³

Then, density would be

ρ = 5kg / 5×10−³m³

ρ = 1000 kg/m³

Thus, the density of 5l of water is 1000kg/m³.

Learn more about density.

brainly.com/question/15164682

#SPJ1

4 0

2 years ago