3 years ago

By any method you choose, determine your average speed of walking

Physics

1 answer:

Neko [114]3 years ago

6 0

You can use simple calculation, or use a speed thermometer.

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A 3-kg object is attached to a spring and moving in simple harmonic motion. Its angular frequency is 20 rads/sec. When the mass-

Trava [24]

Answer:19.5 J

Explanation:

Given

mass of block=3 kg

angular frequency=20 rad/sec

spring constant $k=\omega _n^2m=1200 N/m$

we know total energy remain conserved

$E_T at x=0.1 m$

$E_T=E_P+E_K$

Where $E_K$ =kinetic energy

$E_P$ =potential Energy

$E_P=\frac{1}{2}kx^2$

$E_P=600\times 0.01=6 J$

$E_K=\frac{1}{2}mv^2$

$E_K=\frac{1}{2}\times 3\times 3^2=13.5 J$

$E_T=13.5+6=19.5 J$

When mass reaches amplitude its velocity becomes zero

there is only potential energy which is equal to Total energy

$E_T=E_P=19.5 J$

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3 years ago

A potassium atom (atomic number 19) and a bromine atom (atomic number 35) can form a chemical bond through a transfer of one ele

Nookie1986 [14]

Answer:

it will give one electron to the bromine atom, so the bromine atom will have 36 electrons. this is an ionic bonding

Explanation:

3 0

3 years ago

A batter swings at a baseball. The action force is the bat hitting the ball with a force of 5N. The reaction force, however, can

dlinn [17]

This is false. The reaction force can be determined.

6 0

3 years ago

The ______ creates currents in the atmosphere and the hydrosphere.

padilas [110]

B. The solar energy is responsible for the currents being made in the atmosphese and the hydrosphere. It creates a convection current in the planet that maintains the flow of the air and the water in it. That's why you experience changes in temperature on the air during daytime and night, as well as varying currents on the seaside depending on the time of the day/night.

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4 years ago

Two closed organ pipe gives 4 beats when sounded together at 5°C. Calculate the number of beats in 35°C

Gre4nikov [31]

Answer:

The number of beats is 10.58 in 35°C.

Explanation:

The beat frequency is given by : f₁-f₂

At 5°C, f₁-f₂ = 4

We need to find the number of beats in 35°C.

The frequency in a standing wave is proportional to $\sqrt T$ .

So,

$\dfrac{f_1-f_2}{f_1'-f_2'}=\dfrac{\sqrt {T}}{\sqrt{T'}}\\\\f_1'-f_2'=(f_1-f_2)\times \dfrac{\sqrt{T'}}{\sqrt{T}}\\\\f_1'-f_2'=4\times \dfrac{\sqrt{35}}{\sqrt{5}}\\\\f_1'-f_2'=10.58$

So, the number of beats is 10.58 in 35°C.

7 0

3 years ago