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3 years ago

Which term is also known as a "rate of change"? * a motion b distance c reference point d speed

1 answer:

7 0

Acceleration is the answer.............

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an athlete at the Olympic Game run at constant speed and covers the 100 yard dash in 9.52seconds. what will be his time for 100

pickupchik [31]

Dr.phil can help you with that answer also the answer is 21.3

5 0

3 years ago

Question 3 of 10

Volgvan

Answer:

This oxygen reacts with the carbon of the positive electrodes, forming carbon dioxide, so they gradually burn away. As a result, the positive electrodes have to be replaced frequently. This adds to the cost of the process.

5 0

3 years ago

Consider a air-filled parallel-plate capacitor with plates of length 8 cm, width 5.52 cm, spaced a distance 1.99 cm apart. Now i

prohojiy [21]

Answer:

The ratio of the new potential energy to the potential energy before the insertion of the dielectric is 0.58

Explanation:

Given that,

Length of plates = 8 cm

Width = 5.52 cm

Distance = 1.99 cm

Dielectric constant = 2.6

Length = 4.4 cm

Potential = 0.8 V

We need to calculate the initial capacitance

Using formula of capacitance

$C=\dfrac{\epsilon_{0}A}{d}$

Put the value into the formula

$C=\dfrac{8.85\times10^{-12}\times8\times5.52\times10^{-4}}{1.99\times10^{-2}}$

$C=1.96\times10^{-12}$

We need to calculate the final capacitance

Using formula of capacitance

$C'=\dfrac{\epsilon_{0}A_{1}}{d}+\dfrac{k\epsilon_{0}A_{2}}{d}$

Put the value into the formula

$C'=(\dfrac{8.85\times10^{-12}}{1.99\times10^{-2}})((4.4\times5.52)+(3.6\times5.52)2.6)\times10^{-4}$

$C'=3.37\times10^{-12}$

We need to calculate the ratio of the new potential energy to the potential energy before the insertion of the dielectric

Using formula of energy

$\dfrac{E}{E'}=\dfrac{\dfrac{1}{2}CV^2}{\dfrac{1}{2}C'V^2}$

Put the value into the formula

$\dfrac{E}{E'}=\dfrac{1.96\times10^{-12}}{3.37\times10^{-12}}$

$\dfrac{E}{E'}=0.58$

Hence, The ratio of the new potential energy to the potential energy before the insertion of the dielectric is 0.58

4 0

3 years ago

How long will it take to travel 200 km traveling 10 m/s ?

GuDViN [60]

Convert 200 km to meters which equals 200000 meters. Then take 10m/s*200000meters which equals 2000000 seconds.

5 0

4 years ago

Which of the following best describes an isotope? Which of the following best describes an isotope? an atom with an unequal numb

deff fn [24]

Answer:

a structural variation in which different atoms of the same element have different numbers of neutrons

Explanation:

An isotope is an atom of an element having the same number of protons but different number of neutrons. Different isotopes are used for different purposes. Example: some are used in medicines , food irradiation, etc.

Carbon has three isotopes C 12, C 13, C 14. All three of them have 6 protons but have different numbers of neutrons.

C 12 is a common element and is abundant in nature

C 13 is less abundant than C 12

C 14 is used for dating fossils . It is radioactive

6 0

3 years ago

Which term is also known as a "rate of change"? * a motion b distance c reference point d speed​

Which term is also known as a "rate of change"? * a motion b distance c reference point d speed