230 m/s northeast, 1.8 m/s up
204 kilometres = 204000 metres
15.0 minutes = 900 seconds
Velocity = Distance / Time
= 204000 / 900
= 230 m/s northeast (to 2 sf.)
1.6km = 1600 metres
Velocity = 1600 / 900
= 1.8 m/s up (to 2 sf.)
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The wavelength of the wave is 0.055 m
The relationship between speed, frequency and wavelength of a wave is given by the wave equation:
v is the speed
f is the frequency
is the wavelength
For the sound wave in this problem we have
v = 340 m/s is the speed
f = 6,191 Hz is the frequency
Solving for , we find the wavelength:
Learn more about waves and wavelength:
<span>The scientific method is a process for experimentation that is used to explore observations and answer questions. To apply the scientific method, Meg must: (1) Ask why the pavement is unbearably hot; (2) Research why it could be hot, the matter of the pavement, the temperature of her body; (3) Construct a hypothesis of to why it is unbearably hot; (4) Test her hypothesis with an experiment; (5) Analyze her data and determine whether her hypothesis works; (6) Communicate her results.
The type of precipitation expected to occur in Florida is "Rain" when the temperatures of air and clouds are above freezing point.
Under certain conditions, water droplets get freezes due to low temperatures. However, if the temperature of the air beneath the cloud is higher than the freezing point 32°F (0°C), the frozen start to meltdown due to high temperature and falls as raindrops on the surface of the earth. Hence Rain form of precipitation is expected to occur in Florida when the temperature of the cloud and air is above freezing.
- magnetic force: compass, door catch, speaker, armature
- electric force: air filter, socks
You are expected to have some understanding of how these devices work. It is helpful to actually see one or take it apart.
<u>Magnetic force</u> is involved where there is a magnet or material that responds to a magnet.
Of course a compass aligns itself with the magnetic field of the earth.
A magnetic door catch uses a magnet or pair of magnets to attract a metal plate, holding the door closed.
A speaker uses the reaction between the magnetic field in a coil of wire and that of a fixed magnet to move the speaker cone. (There are versions of speakers that use electrostatic force (electric field), but those are less common.)
A motor moves by creating a magnetic field in the armature that reacts with one in the stator. The latter can be created by fixed magnets, or by an electric current.
<u>Electric force</u> is involved when the operation is a result of the attraction between oppositely charged particles.
An electronic air filter uses the attraction of charged particles to attract "dirt" in the air to a charged surface, so removing it from the air.
Socks from the dryer often cling to each other (static cling) because the charge they get from rubbing other dryer contents is not dissipated in the dry air. (Fabric softener can reduce this effect, presumably by making the materials more electrically conductive.)