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3 years ago

8

PLEASE HELP!!! DUE TOMORROW

1 answer:

Dmitry_Shevchenko [17]3 years ago

6 0

Thermal energy measures the total kinetic energy of the particles in a substance. The greater the motion of particles, the higher a substance's temperature and thermal energy. A substance's total thermal energy depends on its temperature, number of atoms, and physical state.

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Which of the following group 7A elements is the most reactive?

nevsk [136]

Among the elements in group 7A, the most reactive would be Fluorine. Fluorine is a major component of toothpaste, what we use to brush and clean our teeth with. It is so reactive that it cannot be contained in glass.

8 0

4 years ago

I need help please and thank you in advance

forsale [732]

Try to go to Google and type the Answer and it will show you

4 0

4 years ago

Consider four different oscillating systems, indexed using i = 1 , 2 , 3 , 4 . Each system consists of a block of mass mi moving

Rzqust [24]

Answer:

The order is 2>4>3>1 (TE)

Explanation:

Look up attached file

4 0

4 years ago

On a typical clear day, the atmospheric electric field points downward and has a magnitude of approximately 103 N/C. Compare the

Nina [5.8K]

Answer:

a) FE = 0.764FG

b) a = 2.30 m/s^2

Explanation:

a) To compare the gravitational and electric force over the particle you calculate the following ratio:

$\frac{F_E}{F_G}=\frac{qE}{mg}$ (1)

FE: electric force

FG: gravitational force

q: charge of the particle = 1.6*10^-19 C

g: gravitational acceleration = 9.8 m/s^2

E: electric field = 103N/C

m: mass of the particle = 2.2*10^-15 g = 2.2*10^-18 kg

You replace the values of all parameters in the equation (1):

$\frac{F_E}{F_G}=\frac{(1.6*10^{-19}C)(103N/C)}{(2.2*10^{-18}kg)(9.8m/s^2)}\\\\\frac{F_E}{F_G}=0.764$

Then, the gravitational force is 0.764 times the electric force on the particle

b)

The acceleration of the particle is obtained by using the second Newton law:

$F_E-F_G=ma\\\\a=\frac{qE-mg}{m}$

you replace the values of all variables:

$a=\frac{(1.6*10^{-19}C)(103N/C)-(2.2*10^{-18}kg)(9.8m/s^2)}{2.2*10^{-18}kg}\\\\a=-2.30\frac{m}{s^2}$

hence, the acceleration of the particle is 2.30m/s^2, the minus sign means that the particle moves downward.

7 0

3 years ago

What is the wavelength of a wave with a frequency of 262 hz and a speed of 343 m/s

Tamiku [17]

Heya!!

For calculate wavelength, lets applicate formula:

$\boxed{\lambda = V/f}$

<u>Δ Being Δ</u>

f = Frequency = 262 Hz

v = Velocity = 343 m/s

$\lambda$ = Wavelenght = ?

⇒ Let's replace according the formula:

$\boxed{\lambda = 343\ m/s / 262\ Hz }$

⇒ Resolving

$\boxed{\lambda = 1,3 \ m}$

Result:

The wavelength is <u>1,3 meters.</u>

Good Luck!!

8 0

3 years ago

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