All categories

2 years ago

Vitellium (Vi) has the following composition:

Physics

1 answer:

irakobra [83]2 years ago

3 0

Answer:

C It will be closer to the mass of Vi–193.

Explanation:

The average atomic mass of vitellium will be closer to the mass of Vi–193.

From the geonormal abundance we can derive the average atomic mass or relative atomic mass of the compound.

Average atomic mass = sum of all the product of the mass of isotope x abundance of isotope

Average atomic mass = (10.861% x 187.9122) + (12.428% x 190.9047) + (76.11% x 192.8938)

Average atomic mass = 20.41 + 23.73 + 146.81 = 190.95amu

You might be interested in

Please have a look at the image!

EastWind [94]

Nice problem!

Look. At point A the road changes from a straight line to a circular line, then the motion changes from rectilinear to circular motion. So at that point, there is a sudden change in the acceleration, which for sure the passengers feel.

At point B, the circular motion changes from anticlockwise to clockwise, then there is another sudden change in the acceleration.

At point C, the road changes from circular to straihgt line, then the motion changes from rectilinear to circular, which produces a new sudeen change in acceleration.

Then the answeer is the last option, at points A, B and C.

3 0

3 years ago

What is the gravitational force of attraction between a planet and a 17-kilogram mass that is falling freely toward the surface

PolarNik [594]

Answer:

a. 150 N

Explanation:

Gravitational Force: This is the force that act on a body under gravity.

The gravitational force always attract every object on or near the earth's surface. The earth therefore, exerts an attractive force on every object on or near it.

The S.I unit of gravitational force is Newton(N).

Mathematically, gravitational force of attraction is expressed as

(i) F = GmM/r² ........................ Equation 1 ( when it involves two object of different masses on the earth)

(ii) F = mg ............................... Equation 2 ( when it involves one mass and the gravitational field).

Given: m = 17 kg, g = 8.8 m/s²

Substituting into equation 2,

F = 17(8.8)

F = 149.6 N

F ≈ 150 N.

Thus the gravitational force = 150 N

The correct option is a. 150 N

5 0

2 years ago

A ball is spun around in circular motion such that it completes 50 rotations in 25 s. What is the frequency of its rotation? 2.

Elis [28]

Answer:

1. $f = 2 Hz$

2. $f = 0.011 Hz$

3. $f = 0.067 Hz$

4. $t = 4 s$

Explanation:

1. The frequency of rotation is given by:

$f = \frac{\omega}{2\pi}$

Where:

ω: is the angular speed = 50 rotations (revolutions) in 25 s.

We need to convert the units of ω.

$\omega = \frac{50 rev}{25 s}*\frac{2\pi rad}{1 rev} = 4\pi rad/s$

Now, the frequency is:

$f = \frac{4\pi rad/s}{2\pi} = 2 Hz$

2. The frequency is:

We know:

5 laps = 5 revolutions

t: time = 450 s

$f = \frac{\omega}{2\pi} = \frac{\frac{5 rev}{450 s}*\frac{2\pi rad}{1 rev}}{2\pi} = 0.011 Hz$

3. The frequency of the pendulum is:

$f = \frac{\omega}{2\pi} = \frac{\frac{1 rev}{15 s}*\frac{2\pi rad}{1 rev}}{2\pi} = 0.067 Hz$

4. We have:

θ: number of revolutions = 48 rev

f = 12 Hz

t =?

The time can be calculated as follows:

$f = \frac{\omega}{2\pi} = \frac{\theta}{2\pi t}$

$t = \frac{\theta}{2\pi f} = \frac{48 rev*\frac{2\pi rad}{1 rev}}{2\pi*12 Hz} = 4 s$

I hope it helps you!

4 0

2 years ago

a shot is fired with a velocity 100m/s in a direction making an angle 60 degree with vertical. calculate its time flight, maximu

leonid [27]

Answer:

#Horizontal component of 100m/s=100 sin60=50×(root 3)=50×1.732=86.6m/s

#Vertical component of 100m/s=100 cos 60°=100/2=50m/s

(¡) Maximum height it can reach=(v^2+u^2) /2a=0+(50^2) / 2×(-10)=125m

(¡¡) The time takes to reach the maximum height =2S/(u-v)=125×2/(50-0)=5s

(¡¡¡) Horizontal range=ut=86.6×5=433m

Explanation:

# At the highest point (vertical) velocity is zero

#Velocity (horizontal) remains constant

(¡)By v^2=u^2+2as equation

(¡¡)By S=1/2(u+v)t equation

(¡¡¡) S=ut therefore horizontal range=ut

3 0

2 years ago

Maximum current problem. If the current on your power supply exceeds 500 mA it can damage the supply. Suppose the supply is set

NikAS [45]

Answer:

Smallest resistance will be 74 ohm

Explanation:

We have given that if current is exceeds from 500 mA then it can damage the supply, so current i = 500 mA = 0.5 A

Supply is connected to a voltage source of 37 colt

So V = 37 volt

We have to find the smallest resistance

According to ohm's law resistance will be the ratio of voltage and current and here we have given maximum current which will given smallest resistance

So resistance $R=\frac{V}{i}=\frac{37}{0.5}=74ohm$

So smallest resistance will be 74 ohm

8 0

3 years ago