3 years ago

When developing an experimental design, which action could a scientist take

Physics

1 answer:

NNADVOKAT [17]3 years ago

6 0

Answer:

B.Include as many details as possible when writing the conclusion.

This helps improve the quality of their experiment..

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1. A material that is malleable and conducts electricity is most likely : (A) wood (B) ice (C) a metal (D) motor oil

zzz [600]

A material that is malleable and conducts electricity is most likely is a metal. The answer is letter C.

The physical property that makes wax good for making sculpture molds is the melting point. The answer is letter D.

Filtration can be used to separate mixtures based on the size of their particles. The answer is letter D.

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4 years ago

Which vector should be negative?

pentagon [3]

Answer:

The velocity of a falling object

Explanation:

The positive X axis is towards right and positive Y axis is towards up, so North direction is positive

A vector with less than 1 magnitude is not negative, because its magnitude may be in between 0 and 1 which is positive vector.

Any vector whose magnitude is greater than 1 is never be a negative vector.

The velocity of a falling object is towards bottom, that is towards negative Y axis. So that vector is negative.

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3 years ago

A 9.76-m ladder with a mass of 22.6 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upw

galben [10]

Answer:

Part a)

$\tau_{net} = 1397.1 Nm$

Part b)

$I = 702.06 kg m^2$

Explanation:

Part a)

Torque on the rod is due to two forces

(i) Due to weight of the rod at mid point

(ii) Due to external force applied at the end

Now we have

$\tau_{net} = FL - mg\frac{L}{2}$

$\tau_{net} = 254(9.76) - (22.6)(9.81)(\frac{9.76}{2})$

$\tau_{net} = 1397.1 Nm$

Part b)

As per Newton's law we know that

$\tau = I\alpha$

now we have

$1397.1 Nm = I(1.99 rad/s^2)$

$I = 702.06 kg m^2$

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3 years ago

The new sweet potato plant grew from the root of the original through

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The old sweet potatoes rootlings

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4 years ago

Which of the following statements are true? Check all that apply. A. Atoms are always moving. B. The faster atoms are moving, th

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A, d are the true ones :))))))))))

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4 years ago

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