4 years ago

A book is on the table. If the weight of the book is 25 newtons, what is the magnitude and direction of the normal force?

Physics

1 answer:

PilotLPTM [1.2K]4 years ago

7 0

Answer: E.

Explanation: because the book is on the table, its not really moving in any direction.

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Factor 72x^2 - 8/9<br><br> If you can, please show the steps to solve!

ludmilkaskok [199]

Factor out 8 and then facotr and u get

8/9(9x+1)(9x-1

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3 years ago

How is a mixture different from a compound

aksik [14]

Answer:

Compounds are two or more elements chemically combined in definite proportions by weight.

Mixtures are two or more substances not chemically combined.

Explanation:

Hope this helped Mark BRAINLIEST!!!

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3 years ago

Which type of mirror would you use to cook a hot dog and why?

alexandr1967 [171]

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3 years ago

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 car accelerates from rest at a rate of 3 m/s² for 4 seconds. How far did the car travel?

Gnom [1K]

Distance= distance(initial)+v(initial)*t+0.5at^2
D=0+0*4+0.5*3*4^2
D=24 m

4 0

3 years ago

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