Answer:
In plotting position versus time it can be seen that the green line represents a fixed position at the various times given - the other lines represent changing position with time
The correct answer is:
Absorber
An absorber is a material that takes in a wave when the wave hits it.
Answer:
Explained below.
Explanation:
Electromagnetism is defined as the study of the electromagnetic force that takes place between two or more electrically charged particles.
Now, in electromagnetic interaction, the charged particles tend to interact in an electromagnetic manner through the process of exchanging photons. Therefore, it was concluded from various experiments that the magnetic fields lines of forces were always closed, thereby eliminating the possibility of any magnetic monopole in such a manner that within a particular magnetic field, there will be two poles and in the solar system, the electromagnetic attraction between earth magnetic field and solar wind will be by way of a field.
Question: A ship anchored at sea is rocked by waves that have crests 100 m apart the waves travel at 70m/S, at what frequency do the waves reach the ship?
Answer:
0.7 Hz
Explanation:
Applying,
v = λf............... Equation 1
Where v = velocity of the wave, f = frequency fo the wave, λ = wavelength of the wave
make f the subject of the equation
f = v/λ................. Equation 2
From the question,
Given: v = 70 m/s, λ = 100 m ( distance between successive crest)
Substitute these values into equation 2
f = 70/100
f = 0.7 Hz
Hence the frequency at which the wave reach the ship is 0.7 Hz
Answer:
A. The net force acting on the car from all directions is zero.
Explanation:
According to Newton's first law of motion, an object continues its uniform motion along a straight line, the net force acting on the object will be zero.
To experience a force, the object needs to change its speed or the direction of motion. Unless it experiences any change in the magnitude of speed or direction. The car doesn't experience any force.
If car is moving with a uniform speed in a circular motion. The net force acting on the car is not equal to zero. Since the car is changing its direction constantly, a force called centripetal force is acting on it.
Hence, if the car moves in a straight line, the net force acting on the car from all directions is zero.
