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deff fn [24]
3 years ago
5

Suppose a rollerblade racer finished a 132 meter race in 18 seconds. What is the average speed of the rollerblade racer?

Physics
2 answers:
Ivanshal [37]3 years ago
6 0

Answer:

7.33 rounded

Explanation:

Speed = distance divided time

S = d/t

Suppose a Rollerblade racer finished a 132 meter race in 18 seconds. What is the average speed of the Rollerblade racer?

S = 132 divided 18

Speed = 7.33 rounded

Annette [7]3 years ago
5 0

Answer: 7.3 meters a second

Explanation: 132/18=7.3

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Describe the relationship between temperature and energy
yKpoI14uk [10]

Answer:

The Temperature is the measure of Average Kinetic Energy  of the molecule in the substance.

Temperature and Kinetic Energy of molecules are related by the equation

= \frac{3}{2} kT

Where

<E> denotes average kinetic energy

k - Boltzmann constant

T - Temperature of the substance

Explanation:

The energy inside the substance is characterised by translational and vibrational motion.

The molecules in a substance have a range of kinetic energies because they don't all move at the same speed. As a substance absorbs heat the particles move faster so the average kinetic energy and therefore the temperature increases.

As the molecules of a substance vibrate faster their temperature increases.

Thus an increase energy corresponds to an increase in temperature

<E> α T (α denotes proportionality)

= \frac{3}{2} kT

6 0
3 years ago
Coach Wilkins drops a football from the top of the home bleachers at Tiger Stadium. If the stadium is 40.6 meters tall, how long
nydimaria [60]

Answer:70.6 meters

Explanation:

3 0
3 years ago
A standard 1 kilogram weight is a cylinder 49.5 mm in height and 52.5 mm in diameter. What is the density of the material? kg/m3
sergij07 [2.7K]

Answer:

91659.02kg/m^3

Explanation:

We have given mass m = 1 kg

Height of the cylinder h=49.5mm=49.5\times 10^(-3)m

Diameter d=52.5 mm , so radius r=\frac{d}{2}=\frac{52.5}{2}=26.25mm=26.25\times 10^{-3}m

Volume of the cylinder V=\pi r^2h=3.14\times (26.25\times 10^{-3})^2\times 49.5\times 10^{-3}=1.091\times 10^{-5}m^3

We know that density d=\frac{mass}{volume}=\frac{1}{1.091\times 10^{-5}}=91659.02kg/m^3

8 0
3 years ago
What would happen if you place 2 Plane Mirrors parallel to each other?
e-lub [12.9K]

Answer:

No image will be observed.

Explanation:

Images that are created by mirrors are virtual images. This virtual image can only be seen by an observer. In this case, an infinite number of images or no image will be created here as both will be reflecting their own images. Light will continuously bounce back and forth reflecting the same image.

6 0
3 years ago
Which is the last stage in the life cycle of an average star? (1 point)
Shkiper50 [21]

Answer:

The answer is A. White Dwarf

Explanation:

  • <u>average stars like sun end their life as white dwarf surrounded by disappearing planetary nebula. </u>
4 0
2 years ago
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