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3 years ago

What does physics means to you. (own words)

Physics

2 answers:

AlekseyPX3 years ago

6 0

Answer:

the physical properties and phenomena of some thing.

In explannation

Physics is a branch of science. It is one of the most fundamental scientific disciplines. The main goal of physics is to explain how things move in space and time and understand how the universe behaves. It studies matter, forces and their effects. The word physics comes from the Greek .

Please mark me as brainlist

nikitadnepr [17]3 years ago

4 0

the physical properties and phenomena of something.
physics, science that deals with structure of matter.

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Solar-powered cars use energy from the Sun to work. A panel on the car absorbs light energy from the Sun, which then generates a

Gre4nikov [31]

Answer:

radiant, electrical, mechanical :)

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3 years ago

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Two billion people jump up in the air at the same time with an average velocity of 7.0 m/sec. If the mass of

maria [59]

P=m x v =60 x 7.0= 420
total momentum = 420 x 2,000,000,000=dnt have a calculator
thier effect would shake the earth and kill some organism because they jump up at the same time and they wil probably land the same time .

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3 years ago

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Parasaurolophus was a dinosaur whose distinguishing feature was a hollow crest on the head. The 1.5-m-long hollow tube in the cr

Inessa05 [86]

Answer:

58.33 Hz

175 Hz

291.67 Hz

Explanation:

L = Length of tube = 1.5 m

v = Speed of sound in air = 350 m/s

The first resonant frequency is given by

$f_1=\dfrac{v}{4L}\\\Rightarrow f_1=\dfrac{350}{4\times 1.5}\\\Rightarrow f_1=58.33\ Hz$

The first resonant frequency is 58.33 Hz

The second resonant frequency is given by

$f_2=3\dfrac{v}{4L}\\\Rightarrow f_2=3\dfrac{350}{4\times 1.5}\\\Rightarrow f_2=175\ Hz$

The first resonant frequency is 175 Hz

The third resonant frequency is given by

$f_3=5\dfrac{v}{4L}\\\Rightarrow f_3=5\dfrac{350}{4\times 1.5}\\\Rightarrow f_3=291.67\ Hz$

The first resonant frequency is 291.67 Hz

8 0

4 years ago

What is the mass calculate it if the weight of a body is 420 N .

sp2606 [1]

Answer:m=42kg

Explanation:

wieght = mass × gram

420 = mass × 10

therefore , answer is 42

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4 years ago

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A tungsten wire is 1.5m long and has a diameter of A current of flows through the wire. The resistivity of the wire is 5.6 * 10

7nadin3 [17]

Complete Question:

A tungsten wire is 1.5 m long and has a diameter of 1.0 mm. A current of 60 mA flows through the wire. The resistivity of the wire is 5.6 * 10^-8 Ωm. What is the potential difference across the ends of the wire?

Answer:

Potential difference, V = 0.00642 Volts.

Explanation:

Given the following data;

Diameter = 1 mm to meters = 1/1000 = 0.001 m

Length = 1.5m

Current = 60mA = 60/1000 = 0.06 Amperes.

Resistivity = 5.6 * 10^-8 Ωm

To find the potential difference across the ends of the wire;

First of all, we would determine the cross-sectional area of the wire (circle);

$Radius, r = \frac {diameter}{2}$

$Radius = \frac {0.001}{2}$

Radius = 0.0005 m

Area of wire (circle) = πr²

Substituting into the above formula, we have;

Area = 3.142 × (0.0005)²

Area = 3.142 × 2.5 × 10^-7

Area = 7.855 × 10^-7 m²

Next, we find the resistance of wire;

Mathematically, resistance is given by the formula;

$Resistance = P \frac {L}{A}$

Where;

P is the resistivity of the material.

L is the length of the material.

A is the cross-sectional area of the material.

Substituting into the formula, we have;

$Resistance = 5.6 * 10^{-8} \frac {1.5}{7.855 * 10^{-7}}$

$Resistance = 5.6 * 10^{-8} * 1909611.712$

Resistance = 0.107 Ohms.

Now, we can find the potential difference using the formula;

$V = IR$

Where;

V represents voltage or potential difference measured in volts.

I represents current measured in amperes.

R represents resistance measured in ohms.

Substituting into the formula, we have;

$V = 0.06*0.107$

Potential difference, V = 0.00642 Volts.

7 0

3 years ago