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3 years ago

A force of 4 kg weight acts on a body of mass 9.8 kg calculate the acceleration

Physics

2 answers:

klio [65]3 years ago

4 0

Mass=9.8kg
Force=4N

Using newtons second law

$\\ \bull\sf\dashrightarrow Force=Mass\times Acceleration$

$\\ \bull\sf\dashrightarrow Acceleration=\dfrac{Force}{Mass}$

$\\ \bull\sf\dashrightarrow Acceleration=\dfrac{9.8}{4}[tex][tex]\\ \bull\sf\dashrightarrow Acceleration=2.45m/s^2$

White raven [17]3 years ago

3 0

Answer:

here given is a weight

then force becomes mg

that is F=Mg

=4*9.8

then by using the formula

F=Ma

a=F/M

=4*9.8/9.8

Explanation:

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Two antennas located at points A and B are broadcasting radio waves of frequency 96.0 MHz, perfectly in phase with each other. T

earnstyle [38]

Answer:

a) Δφ = 1.51 rad , b) x = 21.17 m

Explanation:

This is an interference problem, as they indicate that the distance AP is on the x-axis the antennas must be on the y-axis, the phase difference is

Δr /λ = Δfi / 2π

Δfi = Δr /λ 2π

Δr = r₂-r₁

let's look the distances

r₁ = 57.0 m

We use Pythagoras' theorem for the other distance

r₂ = √ (x² + y²)

r₂ = √(57² + 9.3²)

r₂ = 57.75 m

The difference is

Δr = 57.75 - 57.0

Δr = 0.75 m

Let's look for the wavelength

c = λ f

λ = c / f

λ = 3 10⁸ / 96.0 10⁶

λ = 3.12 m

Let's calculate

Δφ = 0.75 / 3.12 2π

Δφ = 1.51 rad

b) for destructive interference the path difference must be λ/2, the equation for destructive interference with φ = π remains

Δr = (2n + 1) λ / 2

For the first interference n = 0

Δr = λ / 2

Δr = r₂ - r₁

We substitute the values

√ (x² + y²) - x = 3.12 / 2

Let's solve for distance x

√ (x² + y²) = 1.56 + x

x² + y² = (1.56 + x)²

x² + y² = 1.56² + 2 1.56 x + x²

y2 = 20.4336 +3.12 x

x = (y² -20.4336) /3.12

x = (9.3² -20.4336) /3.12

x = 21.17 m

This is the distance for the first minimum

6 0

3 years ago

Read 2 more answers

Which component of an atom contains the MAJORITY<br> of its mass?

crimeas [40]

Answer:

proton and neutrons

Explanation:

electron has negligible mass

3 0

3 years ago

Calculate the magnitude of the electric force between two charged balloons if one of the balloons has a charge of 15 * 10 ^ - 8

Sati [7]

Answer:

ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN ZAMN

Explanation:

3 0

3 years ago

A sinusoidal wave travels along a string. The time for a particular point to move from maximum displacement to zero is 0.13 s. W

vitfil [10]

Answer:

Part a)

T = 0.52 s

Part b)

$f = 1.92 Hz$

Part c)

$speed = 3.65 m/s$

Explanation:

As we know that the particle move from its maximum displacement to its mean position in t = 0.13 s

so total time period of the particle is given as

$T = 4\times 0.13 = 0.52 s$

now we have

Part a)

T = time to complete one oscillation

so here it will move to and fro for one complete oscillation

so T = 0.52 s

Part b)

As we know that frequency and time period related to each other as

$f = \frac{1}{T}$

$f = \frac{1}{0.52}$

$f = 1.92 Hz$

Part c)

As we know that

wavelength = 1.9 m

frequency = 1.92 Hz

so wave speed is given as

$speed = wavelength \times frequency$

$speed = 1.92 \times 1.9$

$speed = 3.65 m/s$

4 0

3 years ago

Which of the following is the best definition of an element?

Ostrovityanka [42]

Answer:

A. chemical substance whose atoms all have the same number of protons

Explanation:

An element is a substance which contains identical atoms that have the same number of protons in the nucleus.

Elements are arranged in the periodic table according to their atomic number (= number of protons): so atoms of different elements have a different number of protons in their nuclei.

For a neutral atom, the number of electrons around the nucleus is also equal to the number of protons.

Moreover, atoms of the same element can have a different number of neutrons, despite having the same number of protons - these atoms are called isotopes.

8 0

3 years ago