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Harman [31]
2 years ago
9

A hiker shouts toward a vertical cliff 685 m away. The echo is

Physics
1 answer:
miv72 [106K]2 years ago
7 0
To find the speed of sound you take the distance and divide it by the time so 685/4 which equals 171.25 m/s
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Design an experimental set up to show that white light is made up of different colours of light​
DaniilM [7]

Answer:

Issac Newton was the first to use a glass prism to obtain the spectrum of sunlight. He tried to split the colours of the spectrum of white light further by using another similar prism. However, he could not get any more colours. He then placed a second identical prism in an inverted position with respect to the first as shown.

This allowed all the colours of the spectrum to pass through the second prism. He found a beam of white light emerging from the other side of the second prism. This observation gave Newton the idea that the sunlight is made-up of seven colours.

Explanation:

6 0
2 years ago
Considerable scientific work is currently under way to determine whether weak oscillating magnetic fields such as those found ne
VLD [36.1K]

Answer:

The the maximum emf is 2.52\times10^{-11}\ V

Explanation:

Given that,

Magnetic field B = 1.40\times10^{-3}\ T

Frequency = 60 Hz

Diameter = 7.8 μm

We need to calculate the maximum emf

Using formula of emf

\epsilon=NBA\omega

Where, N = number of turns

B= magnetic field

A = area

Put the value in to the formula

\epsilon=1\times1.40\times10^{-3}\times\pi\times(\dfrac{7.8\times10^{-6}}{2})^2\times2\times\pi\times60

\epsilon=2.52\times10^{-11}\ V

Hence, The the maximum emf is 2.52\times10^{-11}\ V

5 0
3 years ago
Which of
artcher [175]

The provided question is not correct as, there is more than one options are correct, however the explaining every correct option -

Answer:

The correct answer are - silver, copper and aluminium all three used as fuse material.

Explanation:

A safety device in any electric circuit of that prevents the electric system in case of short circuit by breaking the connection of electric system or circuit termed as the Fuse or fuse element. Normally the fuse are made up of wire or element of material that are low in melting point and high in resistance.

Zinc, lead, tin, silver, copper, aluminium, and alloy of tin and alloy are used as fuse element or material for their low melting point and high resistance these are easily breaks the electric path in case of short circuit.

5 0
3 years ago
A study where you try to observe subjects in a natural environment is a(n)
Aleksandr [31]

Answer:

i think it Naturalistic observation

Explanation:

6 0
3 years ago
The kinetic energy of a moving object depends on its mass and its
mr Goodwill [35]

Answer:

Velocity

Explanation:

Kinetic Energy of a body can be defined as the amount work needed to accelerate a body of  mass, m, from a position of rest to a particular velocity.

It is also the energy possessed by a body due to its motion.

Mathematically, it is given as:

KE = \frac{1}{2}mv^2

As seen from the formula, the Kinetic energy is dependent on the mass of the body, m, and the square of the velocity, v.

Typically, the mass of an object is a constant value, hence, the kinetic energy varies as velocity varies.

4 0
3 years ago
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