Please help me with this science question.

Answers

Answer 1

Answer: The answer would possibly be H in my mind

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As the bell rings, which energy transformation occurs? A. Mechanical energy is converted into sound energy. B. Chemical energy is converted into heat energy. C. Mechanical energy is converted into heat energy. D. Chemical energy is converted into sound energy.
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A 1,000 kg ball traveling at 5 m/s would have kinetic energy

Is is true the state of a medium helps determine the speed of sound passing through the medium

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Ya, how'd you know, research?

a bus travelling on a straight road at 25m/s accelerates uniformly at 5m/s squared for 2 seconds. find its speed in kilometres per hour

Answers

Answer:

126 kmh⁻¹

Explanation:

We can simply solve this by applying motion equations

where

v - final velocity

u - initial velocity

a-acceleration

t - time

v = u + at

= 25 + 5×2 = 35 ms⁻¹

= (35/1000)×3600 = 126 kmh⁻¹

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 .

In static electricity what are the subatomic particles, their charges, their location in the atom

Answers

Electrons - have a negative charge and orbit the nucleus
Protons - have a positive charge and are located in the nucleus
Neutrons - have no charge and are also located in the nucleus

By what factor would you need to adjust the length of a pendulum to make the period of 1/2 of what it used to be?

Answers

Answer:

1/4

Explanation:

The period of a simple pendulum is:

T = 2π √(L/g)

At half the period:

T/2

= π √(L/g)

= 2π √(L/(4g))

= 2π √((L/4)/g)

So the length would have to be shortened by a factor of 1/4.

A 4.0 kg bucket of water is raised from a wellby a rope.
The acceleration of gravity is 9.81 m/s?.
If the upward acceleration of the bucket is
2.8 m/s², find the force exerted by the rope
on the bucket of water.
1. 69.658
2. 52.84
3. 85.318
4. 70.86
5. 84.429