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2 years ago

9

How many sig figs are in 300000000

2 answers:

Alenkinab [10]2 years ago

7 0

4 - provided two zeroes after the decimal point are there to indicate a degree of precision.

Anna [14]2 years ago

5 0

One and it's the three

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An object is pushed from rest across a sheet of ice, accelerating at 8.0 m/s^2 [E] over a displacement of 1.05 m [E]. The object

tatiyna

Answer:

$D_T=18.567m$

Explanation:

From the question we are told that:

Acceleration $a=8.0 m/s^2$

Displacement $d=1.05 m$

Initial time $t_1=6.0s$

Final Time $t_2=2.5s$

Generally the equation for Velocity of 1.05 travel is mathematically given by

Using Newton's Law of Motion

$V^2=2as$

$V=\sqrt{2*6*1.05}$

$V=4.1m/s$

Generally the equation for Distance traveled before stop is mathematically given by

$d_2=v*t_1$

$d_2=3.098*4$

$d_2=12.392$

Generally the equation for Distance to stop is mathematically given by

Since For this Final section

Final velocity $v_3=0 m/s$

Initial velocity $u_3=4.1 m/s$

Therefore

Using Newton's Law of Motion

$-a_3=(4.1)/(2.5)$

$-a_3=1.64m/s^2$

Giving

$v_3^2=u^2-2ad_3$

Therefore

$d_3=\frac{u_3^2}{2ad_3}$

$d_3=\frac{4.1^2}{2*1.64}$

$d_3=5.125m$

Generally the Total Distance Traveled is mathematically given by

$D_T=d_1+d_2+d_3$

$D_T=5.125m+12.392+1.05 m$

$D_T=18.567m$

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2 years ago

When iron rusts, iron atoms are destroyed true or false?

vfiekz [6]

False. this is just a physical change, not a chemical change.

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A 4300-N force from a car's engines produces an acceleration of 3.3 m/s2. What is the mass of the car?

sertanlavr [38]

Answer:The net force acting on the car is 3×103 Newtons

Explanation:

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2 years ago

How does heat travel between objects that are not touching each each another

skad [1K]

Through heat waves I'm pretty sure

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3 years ago

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Which two quantities can be used to describe motion? A: Displacement and weight. B: speed and acceleration. C: speed and mass. D

HACTEHA [7]

The answer is B as all the other options contain quantities not related to describing motion

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2 years ago