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4 years ago

Why is it important to use constants in an experiment?

1 answer:

5 0

In order for the results to be valid, the dependent variable can only be affected by the independent variable, so somethings need to be kept constant. The things that need to be kept constant are called controlled variables.

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Which statements describe a physical property of matter? Check all that apply

Galina-37 [17]

The correct answer is all mentioned because all have the characteristics that apply in theories of the properties of matter and their physical behaviors, which encompass mass, temperature, smell, and volume.

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4 years ago

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A 1.25 kg block is attached to a spring with spring constant 17.0 N/m . While the block is sitting at rest, a student hits it wi

Free_Kalibri [48]

Answer:

The amplitude of the subsequent oscillations is 13.3 cm

Explanation:

Given;

mass of the block, m = 1.25 kg

spring constant, k = 17 N/m

speed of the block, v = 49 cm/s = 0.49 m/s

To determine the amplitude of the oscillation.

Apply the principle of conservation of energy;

maximum kinetic energy of the stone when hit = maximum potential energy of spring when displaced

$K.E_{max} = U_{max}\\\\\frac{1}{2} mv^2 = \frac{1}{2} kA^2\\\\where;\\\\A \ is \ the \ maximum \ displacement = amplitude \\\\mv^2 = kA^2\\\\A^2 = \frac{mv^2}{k} \\\\A = \sqrt{\frac{mv^2}{k}} \\\\A = \sqrt{\frac{1.25\ \times \ 0.49^2}{17}} \\\\A = 0.133 \ m\\\\A = 13.3 \ cm$

Therefore, the amplitude of the subsequent oscillations is 13.3 cm

6 0

3 years ago

A 5 kg book falls from a shelf. If it lands at a speed of 5.7 m/s, from what height did it fall?

Pachacha [2.7K]

Answer:

57m

Explanation:

speed = 5.7m/s

or 57/10 m/s

so definitely the time taken will be 10 secs

so speed = distance/time taken

5.7= distance/10

distance = 5.7× 10

Distance = 57m

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3 years ago

Please help me in science plss I give brainliest to Answer this plss

Elenna [48]

Stan looga
this is correct answer

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3 years ago

When a fork is placed in a hot piece of lasagna, thermal energy is transferred up the fork by

kirill [66]

fast-moving particles colliding with slow-moving particles

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4 years ago

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