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3 years ago

How much force would you need to accelerate a 4 kg object from a standstill to 5 m/s2?

1 answer:

3 0

To solve this, we use Newtons 2nd law of motion which states that F = m⋅a . This means that a force F is required to make a body of mass m accelerate with an acceleration of a . So if a body of 4kg is to be accelerated by a force 17N then its acceleration can be found by putting into the formula F = m⋅a .

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As a tile falls from the roof of a building to the ground its momentum is conserved.

ludmilkaskok [199]

No it isn't.
Gravity does work on the tile, causing its momentum
and its kinetic energy to increase.

6 0

4 years ago

Read 2 more answers

What is the power of 10 when 157,821 is written in scientific notation?

vlabodo [156]

Answer:

The power of 10 in the given value is 5.

Explanation:

scientific notation is expressed in the decimal form. That means always written in the power of 10 form. The decimal place is put after 1 digit.

3 0

4 years ago

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Party hearing. As the number of people at a party increases, you must raise your voice for a listener to hear you against the ba

dusya [7]

Answer:

$\frac{r_i}{1.77} m$

Explanation:

Given that

At starting separated = 1.20m

And the increase in background noise by Δβ = 5 dB, due to which the level of sound also rises

Based on the above information, the separation rf that is needed is shown below:

As we know that

$I_f = I_o \times 10^{\frac{\beta}{10} }\\\\I_f = I_i \times 10^{0.5}\\\\I_f = 3.16 \times I_i\\\\I \alpha \frac{1}{r^2} \\\\\frac{r_i^2}{r_f^2} = 3.16\\\\r_f = \frac{\sqrt{r_i^2}}{{\sqrt3.16}} \\\\= \frac{r_i}{1.77} m$

Hence, the separation r_f i.e. required is $\frac{r_i}{1.77} m$

We simply applied the above equation so that the correct separation could come

6 0

3 years ago

What color is a carrot?

Mashutka [201]

Answer:

reddish-orrange

Explanation:

please mark me as brainliest

7 0

3 years ago

If 5 complete oscillations of a sound wave pass through a point in 0.5 s and the speed of sound was recorded to be 10 m/s, then

LekaFEV [45]

Answer:

λ = 2.5m

Explanation:

Given the following :

Speed of sound (v) = 10m/s

If 5 oscillations pass through a point in 0.5seconds;

Time taken (period) for 1 oscillation is :

Number of oscillations / total time taken

5 / 0.5 = 0.25 seconds

Wavelength, period and Velocity are related by the formula:

v = λ / T

λ = v * T

λ = 10 * 0.25

λ = 2.5 m

3 0

3 years ago