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Lubov Fominskaja [6]
2 years ago
10

Will mark the brainliest

Physics
1 answer:
Alchen [17]2 years ago
8 0

Answer:

0.1 m

Explanation:

From the question given above, the following data were obtained:

Mass (m) of ball = 4 Kg

Acceleration due to gravity (g) = 9.8 m/s²

Energy (E) = 4 J

Height (h) =?

The height (h) can be obtained by using the following formula:

E = mgh

4 = 4 × 9.8 × h

4 = 39.2 × h

Divide both side by 39.2

h = 4 / 39.2

h = 0.1 m

Thus, the value of h is 0.1 m

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A gas laser has a cavity length of 1/3 m and a single oscillation frequency of 9.0 x 1014 Hz. What is the cavity mode number?
Eddi Din [679]

Answer:

2 × 10⁶

Explanation:

Data provided in the question:

Cavity length, L = \frac{1}{3}m

Oscillation frequency, f_m = 9.0 × 10¹⁴ Hz

Now,

we know,

f_m=\frac{c}{\lambda_m}

here,

c is the speed of light = 3 × 10⁸ m/s

\lambda_m = Wavelength of mode m inside the laser cavity

m is the cavity mode number

Thus,

9.0\times10^{14}=\frac{3\times10^8}{\lambda_m}

or

\lambda_m = \frac{1}{3} × 10⁻⁶

Also,

m\lambda_m = 2L

Therefore,

m × \frac{1}{3} × 10⁻⁶ = 2 × \frac{1}{3}

or

m = 2 × 10⁶

5 0
2 years ago
Suppose that you lift four boxes individually, each at a constant velocity. The boxes have weights of 3.0 N, 4.0 N, 6.0 N, and 2
Alona [7]

Answer:

The vertical distance of weight 3.0 N = 4 m, vertical distance of weight 4.0 N = 3 m, vertical distance of weight 6.0 N = 2 m, vertical distance of weight 2.0 N = 6 m

Explanation:

Worked : work can be defined as the product of force and distance.

The S.I unit of work is Joules (J).

Mathematically it can be represented as,

W = F×d.................. Equation 1

d = W/F.............................. Equation 2

where W = work, F = force, d = distance.

<em>Given: W = 12 J</em>

(i) for the 3.0 N weight,

using equation 2

d = 12/3

d= 4 m.

(ii) for the 4.0 N weight,

d = 12/4

d = 3 m.

(iii) for the 6.0 N weight,

d = 12/6

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(iv) for the 2.0 N weight,

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8 0
2 years ago
A helicopter flies 250 km on a straight path in a direction 60° south of east. The east component of the helicopter’s displaceme
GaryK [48]

Given that,

Distance in south-west direction = 250 km

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East component = ?

since,

cos ∅ = base/hypotenuse

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East component = 250 * cos 60°

East component = 125 km

8 0
2 years ago
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Phantasy [73]

Answer:

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6 0
2 years ago
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Which of the following statements best represents the impact of evolutionary theory on the field of psychology?
grandymaker [24]

Answer- the correct option for the question would be choice number c which tells us about the natural selection process of human species.

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On studying the facts under these prospects the evolution of psychology gives us the idea of the selection by nature of individuals and the pattern of their behavior shown in different aspects.

8 0
2 years ago
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