A spoon can sound like a bell. Explain scientifically in detail.

Answers

Answer 1

Answer: So the question is how can a spoon sound like a bell. Sound waves are mechanical waves that have their frequency. When a source, in this case a spoon and a bell oscilate, they produce sound waves. If they produce those sound waves in the same frequency, then we can say they produce the same tone thus they sound the same.

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What instrument is used to measure relative humidity and how does it work?

Answers

The measurement of humidity may be done directly by a hygrometer.

But the usual instrument is called a psychrometer, which uses two thermometers to obtain temperatures that indicate the relative humidity.

A psychrometer is an instrument that uses the difference in readings between two thermometers, one having a wet bulb and the other having a dry bulb, to measure the moisture content or relative humidity of air. When air is saturated, the bulbs have the same temperature. When it is less than saturated, the moisture around the wet bulb evaporates, cooling the wet bulb until it is cooled to the temperature where the concentration of water vapor in the air would saturate air at that temperature.

psychrometer

Relative humidity is a measure of water vapor in the air compared with the maximum amount of water vapor the air can hold at that temperature. It can be measured by using a variety of instruments, such as a thin polymer film, a psychrometer, a dew cell, and a hair hygrometer.
sling psycrhometer
A hygrometer or a psychrometer will measure relative humidity.
A hygrometer.
psychrometer
Thermo-hygrograph. It uses two thermometers, one gives dry temperature is is hung in the air, while the second one is dipped in water with the help of a wick. As the evaporation of water depends on the relative humidity in the air, when there is a big difference in dry and wet temperatures it means that humidity is low and vice versa. The exact humidity is found out with the help of a table Relative humidity can be measured by a psychrometer .

The brightness of a star depends on its (color, composition of atmosphere, or distance from earth), and stars that are closer look (brighter, dimmer, or white).(in parentheses is options)

Answers

The brightness of stars depends on its distance from earth. Stars that are closer look brighter. Star stuff is my favorite thing to learn about because I'm a sweaty nerd, so if you have anymore related questions I'd love to answer them.

The apparent brightness of a star depends on how bright it really IS, and also on its distance from Earth. Just like matches, flashlights, and fireflies, stars that are closer to us look brighter to us. (Think about the Sun.)

Why is the work output always less than the work input?

Answers

because energy is wasted either in the form of heat energy or something else (like friction)

In which of these situations, is mechanical energy being conserved? (Neglect, air resistance, friction and breaking) Check all that apply.Child on a swing

Pendulum

Bow and Arrow

Roller Coaster

Answers

Answer:

Neglecting, air resistance, friction and breaking, all the condition has conservation of mechanical energy.

Explanation:

The law of conservation of mechanical energy suggests that the mechanical energy in a locked system with out any destructive forces like friction or air resistance remains always the same (constant).
The energy may be converted between kinetic energy, potential energy, gravitational potential but energy do not get decreased in any cases as mentioned in the option.
So all the cases mentioned above shows the conservation pattern of mechanical energy.

A child drags a 0.398 kg toy dogacross flat ground at constant speed,
with a 4.63 N force at a 63.0° angle.
What is the force of friction on the
toy?
(Hint: You do NOT need to know the
coefficient of friction.)

Answers

The force of friction on the toy is 2.10 N and it acts opposite to the direction of its motion.

What is friction?

A force called friction prevents one solid object from rolling or sliding over another. Although frictional forces, such the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion.

Given parameters:

mass of the toy dog: M = 0.398 kg.

Applied force: F = 4.63 N.

Angle of application of force: θ = 63.0°

Hence, horizontal component of applied force = F cosθ

= 4.63 × cos63.0° N

= 2.10 N.

As the child drags a 0.398 kg toy dog across flat ground at constant speed, this component of applied force is nullified by force of friction.

Hence, the force of friction on the toy is 2.10 N and it acts opposite to the direction of its motion.

Learn more about friction here:

brainly.com/question/13000653

#SPJ2

Answer:

-2.1 N

Explanation:

2. A ball tied to a pole by a rope swings in a circular path with a centripetal acceleration of 2.7 m/s. If the ball has atangential speed of 2.0 m/s, what is the diameter of the circular path in which it travels?

Answers

Answer: The diameter of the circular path is 2.96m

Explanation: centripetal acceleration = tangential speed^2 / radius of the circular path.

Centripetal acceleration = 2.7m/s^2

Tangential speed = 2.0m/s

Radius = 2.0^2 / 2.7 = 4/2.7

= 1.48m

Diameter = radius*2

= 1.48*2 = 2.96m.

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