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3 years ago

Calculate the speed of an object that tavels 62.43m in 38.4s

1 answer:

8 0

The speed of the object can be calculated using the formula:

Speed = distance/time

The given values are:
distance = 62.43 m
time = 38.4 s

Solution:

speed = 62.43 m / 38.4 s = 1.63 m/s

Therefore, the speed of an object that travels 62.43m in 38.4s is <span> 1.63 m/s.</span>

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An electron has a velocity of 3.2 x 10^6 m/s. What is its’ momentum? (b) What is its’ wavelength? (c) What other objects/materia

Romashka [77]

Answer:

P = 2.91*10^{-24} kg m/s

$\lambda = 2.73 *10^{-10} m$

size of atom hat lie in range of 1 to 5 Angstrom

$\Delta x = 0.2272$ Angstrom

Explanation:

A) MOMENTUM

p = mv

where m is mass of electron

so momentum p can be calculated as

p = 9.11*10^{-31} *3.2*10^{6}

P = 2.91*10^{-24} kg m/s

b) wavelength

$\lambda = \frac{h}{mv}$

where h is plank constant

so $\lambda = \frac{6.626*10^{-34}}{2.91*10^{-24}}$

$\lambda = 2.73 *10^{-10} m$

c) size of atom hat lie in range of 1 to 5 Angstrom

d) from the information given in the question we have

$\frac{\Delta v}{v} = 0.1$

$\Delta v = 0.1 v$

we know that

$\Delta p *\Delta x = \frac{h}{4\pi}$

$m \Delta v \Delta x =\frac{h}{4\pi}$

$\Delta x = \frac{h}{m \Delta v}$

$\Delta x = \frac{2.272}{0.1}$ [ $\Delta v = 0.1 v$ ]

$\Delta x = 0.2272$ Angstrom

7 0

4 years ago

The energy transferred between samples of matter because of a difference in their temperatures is called

Liono4ka [1.6K]

<h2>Answer: Heat </h2>

Heat is energy in transit, that is, transfer of (thermal) energy from one body or system to another.

In other words, when you have two bodies with different temperatures and thermal energy is transferred from one body to another, implying a high speed and kinetic energy in the particles involved, we are talking about heat.

When both bodies or the complete system reaches the thermal equilibrium (they are at the same temperature) the process is over and there is no heat.

8 0

3 years ago

The boiling point of water is 1000 C at sea level. The boiling point of butane is -1.50C… If we leave liquid butane in a bowl on

deff fn [24]

Answer: If we leave liquid butane in a bowl on a table in a room where the temperature is $24^{o}C$ , butane will evaporate.

Explanation:

A temperature at which the the liquid and gaseous phase of a substance of a substance are present in equilibrium with each other is called boiling point.

For example, the boiling point of butane is -1.5 degree Celsius.

This means that at a temperature above -1.5 degree Celsius, butane will exist is gaseous state. That is, at a temperature of 24 degree Celsius butane will evaporate.

Thus, we can conclude that if we leave liquid butane in a bowl on a table in a room where the temperature is $24^{o}C$ , butane will evaporate.

8 0

3 years ago

Naomi Osaka, a Japanese-African-American tennis player is the 2021 Australian Open Champion, and the first Asian tennis player i

pychu [463]

Answer:

(a) t = 0.75 s

(b) d = 26 m

Explanation:

Height, h = 12 m

Angle, A = 30 degree

initial velocity, u = 40 m/s

(a) Let the time is t.

Use second equation of motion

$h = u t + 0.5 at^2\\\\12 = 40 sin 30 t - 0.5 \times10 \times t^2\\\\12 = 20 t - 5 t^2\\\\5 t^2 - 20 t + 12 =0 \\\\t = \frac{20\pm \sqrt{400-240}}{10}\\\\t = \frac{20\pm 12.65}{10}\\\\t = 3.3 s, 0.75 s$

(b) d = u cos A t

d = 40 x cos 30 x 0.75 = 26 m

3 0

3 years ago

Which type of energy is converted when gasoline burns in an engine?

Deffense [45]

I believe the answer is C

4 0

3 years ago