Sl unit of upthrust and SI unit of pressure

On a cold winter day, a penny (mass 2.50 g) and a nickel (mass 5.00 g) are lying on the smooth (frictionless) surface of a froze

sp2606 [1]

Answer:

0.78333 m/s in the opposite direction

1.566 m/s in the same direction

Explanation:

$m_1$ = Mass of penny = 0.0025 kg

$m_2$ = Mass of nickel = 0.005 kg

$u_1$ = Initial Velocity of penny = 2.35 m/s

$u_2$ = Initial Velocity of nickel = 0 m/s

$v_1$ = Final Velocity of penny

$v_2$ = Final Velocity of nickel

As momentum and Energy is conserved

$m_{1}u_{1}+m_{2}u_{2}=m_{1}v_{1}+m_{2}v_{2}$

${\tfrac {1}{2}}m_{1}u_{1}^{2}+{\tfrac {1}{2}}m_{2}u_{2}^{2}={\tfrac {1}{2}}m_{1}v_{1}^{2}+{\tfrac {1}{2}}m_{2}v_{2}^{2}$

From the two equations we get

$v_{1}=\frac{m_1-m_2}{m_1+m_2}u_{1}+\frac{2m_2}{m_1+m_2}u_2\\\Rightarrow v_1=\frac{0.0025-0.005}{0.0025+0.005}\times 2.35+\frac{2\times 0.5}{0.4005+0.5}\times 0\\\Rightarrow v_1=-0.78333\ m/s$

The final velocity of the penny is 0.78333 m/s in the opposite direction

$v_{2}=\frac{2m_1}{m_1+m_2}u_{1}+\frac{m_2-m_1}{m_1+m_2}u_2\\\Rightarrow v_2=\frac{2\times 0.0025}{0.0025+0.005}\times 2.35+\frac{0.005-0.0025}{0.005+0.0025}\times 0\\\Rightarrow v_2=1.566\ m/s$

The final velocity of the nickel is 1.566 m/s in the same direction

6 0

3 years ago

How is electron movement related to the bonding in sodium chloride? A) The atomic orbitals overlap and share electrons causing a

posledela

Answer: Option (C) is the correct answer.

Explanation:

Sodium has atomic number 11 and its electronic distribution is 2, 8, 1. Whereas chlorine has atomic number 17 and its electronic configuration is 2, 8, 7.

Therefore, we can see that sodium has one extra electron and chlorine has deficiency of one electron.

So, in order to complete their octet sodium will give its one valence electron to the chlorine atom. Hence, there is exchange of electrons and thus it will result in the formation of ionic bond.

Thus, we can conclude that in sodium chloride electron movement is related to the bonding as electrons exchange creating ions to form an ionic bond by electrostatic attraction.

8 0

3 years ago

Read 2 more answers

Consider a 3 m long string, clamped at both ends. The string has a mass of 60 g and waves travel at v = 100 m/s. The third harmo

PilotLPTM [1.2K]

Answer:

a) λ = 2 m

, c) f = 50 Hz

Explanation:

When a string is fixed at the ends the wave is reflected at each end, giving rise to a standing wave.

Since we extract them are fixed we have nodes at these points, the wavelength in the string is

fundamental λ = 2L

2nd harmonic λ= 2L / 2

3 harmonica λ= 2L / 3

a and b) from aui we can find the wavelength

λ = 2 3/3

λ = 2 m

c) the speed of the wave is related to the frequency and wavelength

v = λ f

f = v / λ

f = 100/2

f = 50 Hz

d) the acceleration can be found with the equations

a = d²y / dt²

the standing wave equation is

y = 2A sin kx cos wt

a = -2A w² sin kx cos wt

the acceleration is maximum when the cosine is ±1

A = 2A w² sin kx

the oscillatory part indicates that the wave moves, if we make this maximum vine, they relate it to

a = 2A w²

w = 2πf

A = 0.2 cm = 0.002 m

a = 2 0.002 (2π 50)²

a = 98.7 m / s

8 0

3 years ago

What constant acceleration is required to increase the speed of a car from 27 mi/h to 53 mi/h in 3s?

mario62 [17]

Answer:

8.87 m/s^2

Explanation:

Acceleration is change in velocity over a change in time

27 to 53 = 26 m/s change in velocity

26 m/s / 3 s = 8.87 m /s^2

7 0

2 years ago

which of the following has the greatest impact on an ecosystem migratory animals predation human inference

laiz [17]

Answer:

human interference

Explanation:

Think of the hybrid lady bug..introduced to control insects on crops.

now they are reproducing rapidly, eating natural ladybugs, and other helpful insects..I haven't seen a red ladybug for years. in nw Illinois..

6 0

3 years ago

Sl unit of upthrust and SI unit of pressure​

Sl unit of upthrust and SI unit of pressure