O be useful in science, a hypothesis must be *

A bicycle racer rides from a starting marker to a turnaround marker at 10 m/s. She then rides back along the same route from the

vitfil [10]

Answer:

12.31 m/s

Explanation:

If we recall from the previous knowledge we had about speed,

we will know that:

speed = distance/ time.

As such:

The average speed of the rider bicycle is

average speed = total distance/ total time

Mathematically, it can be computed as:

$v_{avg} = \dfrac{d+d}{\dfrac{d}{v_1}+ \dfrac{d}{v_2}}$

$v_{avg} = \dfrac{2d}{\dfrac{d}{10 \ m/s}+ \dfrac{d}{16 \ m/s}}$

$v_{avg} = \dfrac{2}{\dfrac{1}{10 \ m/s}+ \dfrac{1}{16 \ m/s}}$

$v_{avg} = \dfrac{2}{\dfrac{13}{80 \ m/s}}$

$\mathbf{v_{avg} =12.31 \ m/s}$

8 0

3 years ago

A student claims that when two bodies not initially in thermal equilibrium are placed in contact, the rise in temperature of the

zimovet [89]

Answer:

Explanation:

No.

There is a difference between energy, called heat in this case, and temperature, which is a measure of the amount of heat contained in a material and is dependent on the material properties.

Temperature difference is what causes heat to move from one body to another.

Two objects at different temperatures placed in contact with one another will cause heat to move from the warmer body to the colder body until the temperature difference is eliminated.

The amount of heat leaving the warmer body will exactly equal the amount of heat absorbed by the cooler body. (assuming isolated system of two bodies) The temperature change within each of those bodies could be vastly different.

Example would be a 2 mm bead of molten lead dropped into a liter glass of tap water. The lead may cool several hundred °C as it solidifies while the water temperature would increase less than 1 °C

3 0

3 years ago

explain to the guest and learners the procedure and guidelines that are used in making an instrument used to monitor the tempera

Aloiza [94]

In making a thermometer used to monitor the temperature of the water, a glass tube, a scale, and a thermometric liquid such as alcohol is required.

<h3>What is a thermometer?</h3>

A thermometer is an instrument that is used to measure or read the temperature of a body or a substance.

There are different types of thermometers such as:

Liquid-in-glass thermometers
Gas thermometers
Resistance thermometers

A simple liquid-in-glass thermometer consists of the following parts:

A glass tube
A scale
A thermometric liquid such as alcohol

Therefor, in making a thermometer used to monitor the temperature of the water, a glass tube, a scale, and a thermometric liquid such as alcohol is required.

In conclusion, a thermometer is the instrument used in measuring temperature.

Learn more about thermometers at: brainly.com/question/25034625

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3 0

2 years ago

If the overall magnification of a series of two lenses is 30x, and one lens magnifies 5x, what is the magnification of the other

dimulka [17.4K]

Answer:

Explanation:

Given

Overall magnification $M=30 x$