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3 years ago

Like magnetic poles will repel each other, while opposite magnetic poles will attract each other true or false

Physics

1 answer:

NISA [10]3 years ago

4 0

The answer is True because Magnetic poles act like charges, they attract oppisites and repel

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Consider the voltage/time graph shown below. What power supply is likely to be involved? Select one:

solniwko [45]

C a domestic power socket

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4 years ago

If an object free-falls for t seconds from rest to d distance, how far will the object fall from rest in twice the elapsed time?

balu736 [363]

Answer:

When the time of fall is doubled, the height of fall will be quadrupled

Explanation:

Given;

height of fall, h = d m

time of fall, t = t s

initial velocity of the object, u = 0 m/d

The height of fall of the object is calculated from the kinematic equation below;

$h = ut + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\h = \frac{1}{2} gt^2\\\\2h = gt^2\\\\g = \frac{2h}{t^2}$

where;

g is acceleration due to gravity, which is constant

if the time of fall is doubled, the height of fall is calculated as;

$\frac{2h_1}{t_1^2} = \frac{2h_2}{t_2^2} \\\\\frac{h_1}{t_1^2} = \frac{h_2}{t_2^2}\\\\(Note: h_1 = d, \ and \ t_1 = t)\\\\h_2 = \frac{h_1t_2^2}{t_1^2} \\\\h_2 = \frac{(d)(2t_1)^2}{t_1^2} \\\\h_2 = \frac{(d)(2t)^2}{t^2}\\\\h_2 = \frac{(d)\times 4t^2}{t^2}\\\\h_2 = 4d$

Therefore, when the time of fall is doubled, the height of fall will be quadrupled

6 0

3 years ago

What are some potential sources of error in the<br> experiment that is described in the article?

mezya [45]

Explanation:

common source of error include instrumental, environmental, procedural , and human Police Stop all of these errors can be either random for systematic depending on how they affect the results.

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3 years ago

A 4.04 kg block slides down a smooth, frictionless plane having an inclination of 30◦. The acceleration of gravity is 9.8 m/s^2.

aleksandrvk [35]

Answer:

Explanation:

What a lot of words to solve such a simple problem! The perpendicular force is the one that is pushing straight down on the plane. There is no side to side movement here or friction acting on this dimension at all. Perpendicular force is the same as the weight of the block. That's it! Perpendicular force is also normal force which is the same thing as weight:

w = mg so

w = (4.04)(9.8) and

w = 4.0 × 10¹ N

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3 years ago

Which of the following are located on a plant's leaves?

valina [46]

i think its stomata....

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2 years ago