All categories

2 years ago

Write 200m and 2 ×10^4m in kmwrite 5000ms and 5×10^7ms in seconds

Physics

1 answer:

WINSTONCH [101]2 years ago

5 0

Answer:

a) 20.2 kilometers

b)50 005 seconds

Explanation:

You might be interested in

discuss the difference between molarity and molality, state the units of each, state the symbol of each, and give an example of

Afina-wow [57]

Molarity and molality both describe the concentration of a substance in terms of moles.
Molarity describes the number of moles of a substance per unit of volume, typically per liter (mol/l).
Molality describes the number of moles per unit of mass, typically kilograms (mol/kg).
When determining the molality of a solution, mol/kg can be obtained by finding the number of moles in the substance, and dividing that number by the the total weight in kilograms of that substance.
When determining the molarity of a solution, mol/l can be obtained by dividing the number of moles in a substance by the total volume in liters of that substance.

5 0

2 years ago

A battery of voltage 9.0 V produces a current of 0.0175 A across a circuit. What is the resistance of the circuit?

Natalka [10]

Answer:

$514.288$

Explanation:

V=IR

R=V/I

R=9/0.0175

8 0

2 years ago

If the amplitude of a simple harmonic oscillator is doubled, by what factor does the total energy increase?

dybincka [34]

Answer:

c)by a factor of four

Explanation:

The total energy of a simple harmonic oscillator is given by

$E=\frac{1}{2}kA^2$

where

k is the spring constant of the oscillator

A is the amplitude of the motion

In this problem, the amplitude of the oscillator is doubled, so

A' = 2A

Therefore, the new total energy is

$E'=\frac{1}{2}k(2A)^2=4(\frac{1}{2}kA^2)=4E$

So, the total energy increases by a factor 4.

6 0

2 years ago

A 55-kg woman is wearing high heels.

Grace [21]

Answer:

Pressure, $P=1.90\times 10^7\ Pa$

Explanation:

It is given that,

Mass of the woman, m = 55 kg

Diameter of the circular cross section, d = 6 mm

Radius, r = 3 mm = 0.003 m

Let P is the pressure exerted on the floor. It is equal to the force acting on woman per unit area. It is given by :

$P=\dfrac{F}{A}$

$P=\dfrac{mg}{\pi r^2}$

$P=\dfrac{55\times 9.8}{\pi (0.003)^2}$

$P=1.90\times 10^7\ Pa$

So, the pressure exerted on the floor is $1.90\times 10^7\ Pa$ . Hence, this is the required solution.

7 0

2 years ago

Match the type of radiation to a correct description of it. A. Alpha The radiation particle is negatively charged. B. Beta The r

lawyer [7]

Alpha - <span>The radiation particle is positively charged.
</span>Beta - <span>The radiation particle is negatively charged.
</span>Gamma - The radiation is a wave, not a particle.

5 0

2 years ago