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3 years ago

How can you safely experiment with plants during a scientific investigation?

Physics

2 answers:

UNO [17]3 years ago

4 0

B never eat or taste them because sometimes the plant may be dangerous

liubo4ka [24]3 years ago

3 0

I would think the answer is c.

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A small branch is wedged under a 200 kg rock and rests on a smaller object. The smaller object is 2.0 m from the large rock and

Alexxandr [17]

Answer:

$F =326.7 \ N$

$M = 6$

Explanation:

From the question we are told that

The mass of the rock is $m_r = 200 \ kg$

The length of the small object from the rock is $d = 2 \ m$

The length of the small object from the branch $l = 12 \ m$

An image representing this lever set-up is shown on the first uploaded image

Here the small object acts as a fulcrum

The force exerted by the weight of the rock is mathematically evaluated as

$W = m_r * g$

substituting values

$W = 200 * 9.8$

$W = 1960 \ N$

So at equilibrium the sum of the moment about the fulcrum is mathematically represented as

$\sum M_f = F * cos \theta * l - W cos\theta * d = 0$

Here $\theta$ is very small so $cos\theta * l = l$

and $cos\theta * d = d$

Hence

$F * l - W * d = 0$

=> $F = \frac{W * d}{l}$

substituting values

$F = \frac{1960 * 2}{12}$

$F =326.7 \ N$

The mechanical advantage is mathematically evaluated as

$M = \frac{W}{F}$

substituting values

$M = \frac{1960}{326.7}$

$M = 6$

6 0

3 years ago

Which conversion can take place in a transformer

Naddik [55]

Answer:

D. A lower Voltage into a higher

5 0

3 years ago

If the resistance in a circuit remains constant, what happens to the electric power when the current increases?

bearhunter [10]

If the resistance in a circuit remains constant and the current increases, then the power will increase. (A)

In fact, it'll increase as fast as the square of the current ! Like, if the current somehow increases to 3 times as much, the circuit will start using 9 times as much power as it did before.

4 0

3 years ago

Read 2 more answers

Galileo was the first scientist to do which of the following?

MA_775_DIABLO [31]

He was the first to improve the telescope i believe

3 0

3 years ago

Read 2 more answers

The formula for calculating power is worn divided by time (power=work/time). What are two ways of stating the same relationship

quester [9]

Answer:

power * time = work and Power/work = time

Explanation:

In each one we are changing the way the equation is written. In power * time = work, we are isolating work and in Power/Work = time we are isolating time.

4 0

3 years ago