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3 years ago

11

Velocity can only be described including both

2 answers:

anygoal [31]3 years ago

8 0

Answer:

A

Explanation:

Harman [31]3 years ago

3 0

Answer:

The velocity can be described with both displacement and time. It has direction and magnitude.

Explanation:

The velocity is defined as the rate of change of displacement with time.

V = d/t m/s

It is a vector quantity having magnitude and direction.

The magnitude of the velocity is the speed in the given direction. Hence it is equivalent to the speed of the object in the given direction.

Based on the position of the coordinate, the velocity can be positive or negative.

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The wattage marked on a lightbulb is not an inherent property of the bulb but depends on the voltage to which it is connected, u

Mashutka [201]

Answer:

The current that flows through the lamp is 0.5 A.

Explanation:

A lamp functions like a resistor and the real power absorbed by a resistor is given by the product of the voltage drop across it's terminals and the current that flows through it. If we wish to find the current that this lamp draws we should divide the wattage given (60 W) by the voltage drop provided (120 V). We then have:

i = P/V = 60/120 = 0.5 A.

5 0

3 years ago

A 3.59 kg block is released from rest 53.0 m above the ground. When it has fallen 21.3 m, what is its kinetic energy

Juli2301 [7.4K]

<h3><u>Answer:-</u></h3>

$\implies$ 1115.2 Joules

<h3><u>Given :- </u></h3>

$\red{\leadsto}\:$ $\textsf{Height\: at \:rest\:}$ $\sf,h_2= 53.0m$

$\green{\leadsto}\:$ $\textsf{Height\: to\:which\;block\:}$ $\sf,h_1= 21.3$

<h3><u>Solution</u> :-</h3>

$\maltese$ As the block falls , the change in potential energy will be converted into kinetic energy

$\leadsto$ Potential Energy at rest at height, $h_2$ = $\sf mgh_2$

$\leadsto$ Potential Energy when fell at height, $h_1$ = $\sf mgh_1$

$\\$

$\leadsto$ Kinetic energy= Change in Potential energy = = $\sf mgh_2-mgh_1$

$\begin{gathered}\implies\quad \sf mg(h_2-h_1) \\\end{gathered}$

$\begin{gathered}\implies\quad \sf mg(53.0-21.3) \\\end{gathered}$

$\begin{gathered}\implies\quad \sf 3.59 \times 9.8\times (53.0-21.3) \\\end{gathered}$

$\begin{gathered}\implies\quad \sf 3.59 \times 9.8\times 31.7\\\end{gathered}$

$\begin{gathered}\implies\quad \boxed{\sf{1115.2\: Joules}}\\\end{gathered}$

7 0

3 years ago

Why might a scientist want to use a model to study the solar system? O A. Its extreme simplicity makes it difficult to see patte

ivanzaharov [21]

Answer:

B

Explanation:

8 0

4 years ago

Read 2 more answers

What is a controlled experiment? none of the variables are changed all variables are kept constant two variables are changed at

Ostrovityanka [42]

One variable is changed at a time

7 0

4 years ago

The electron affinity of thulium has been measured by a technique known as laser photodetachment electron spectroscopy. In this

antoniya [11.8K]

Answer:

ΔE = 1.031 eV

Explanation:

For this exercise let's calculate the energy of the photons using Planck's equation

E = h f

wavelength and frequency are related

c = λ f

f = c /λ

let's substitute

E = h c /λ

let's calculate

E = 6.63 10⁻³⁴ 3 10⁸/1064 10⁻⁹

E = 1.869 10⁻¹⁹ J

let's reduce to eV

E = 1.869 10⁻¹⁹ J (1 eV / 1.6 10⁻¹⁹ J)

E = 1.168 eV

therefore the electron affinity is

ΔE = E - 0.137

ΔE = 1.168 - 0.137

ΔE = 1.031 eV

3 0

3 years ago