What principal of a lever is being used in this photograph?

True or false according to newtons 1st law an unbalanced force can change the motion of an object

lisov135 [29]

I think this is true

6 0

3 years ago

Give reasons for the following,

Margaret [11]

Answer:

a) Pascal is a derived unit because it is derived from the unit of force and area

b)Mass is a fundamental quantity because it doesn't depends upon others physical quantity and made up of only one unit

c) unit of power is a derived unit because they are dependent quantities

D) unit of length is a fundamental unit because it cannot be expressed in terms of another quantity.

4 0

3 years ago

Scientists in the laboratory create a uniform electric field e⃗ = 6. 0×105 k^v/m in a region of space where b⃗ =0⃗

zvonat [6]

Scientist in the laboratory create uniform electric field.

PART A: The electric field in rocket frame is (0,0, 6.0 × 10 ⁵).

PART B: The magnetic field in the rocket frame is 7.3 × 10⁻⁶ j∧ .

<h3>What is uniform electric field?</h3>

The electric field whose strength is not changing with respect to time is called uniform magnetic field.

The electric field is 6.0 × 10 ⁵ k^v/m and the magnetic field is zero.

E' = E + (V×B)

= 6.0 × 10 ⁵ + (1.1 × 10⁶ × 0)

E' = 6.0 × 10 ⁵ k∧

(Ex , Ey, Ez) = (0,0, 6.0 × 10 ⁵)

The new magnetic field is represented as

B' = B - 1 /c²(v × E)

=0 - 1 / (3× 10⁸)²(1.1 × 10⁶ i∧ × 6.0 × 10 ⁵k∧ )

B' = 7.3 × 10⁻⁶ j∧

PART A: The electric field in rocket frame is (0,0, 6.0 × 10 ⁵).

PART B: The magnetic field in the rocket frame is 7.3 × 10⁻⁶ j∧ .

Learn more about uniform electric field.

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7 0

2 years ago

Which electromagnetic waves have the highest frequencies in the electromagnetic spectrum?

Andrei [34K]

<h2>Answer: Gamma Rays</h2>

Explanation:

The speed $c$ of an electromagnetic wave is given by:

$c=f.\lambda$ (1)

Where $f$ is the frequency and $\lambda$ the wavelength.

Finding $f$ from (1):

$f=\frac{c}{\lambda}$ (2)

As we can see, there is an inverse relation between the frequency and the wavelength (taking into account the speed of light is constant). This means, the smaller the wavelength, the greater the frequency.

Now, in the electromagnetic spectrum gamma rays has the smallest wavelength, in the order of $10^{-6} nm$ . Therefore, gamma rays has the highest frequencies in the electromagnetic spectrum.

5 0

3 years ago

Read 2 more answers

How are frequency,wavelength and pitch related

nikdorinn [45]

Hi there!

The frequency and wavelength of a wave can determine the pitch of the wave.
For example, if I had a sound wave with low frequency and a long wavelength, I'd have a lower pitched sound.

Hope this helps!

4 0

3 years ago