Answer:
D. 3 psi
Explanation:
Pressure is defined as force acting per unit area and is numerically expressed as:
where P represent pressure, F is force and A is area where the force acts. Substituting 300 lb for force and 100 sq.in for area then pressure,
Therefore, from the choices given, option D, 3psi is the right choice.
<u>N</u><u>o</u><u>n</u><u> </u><u>-</u><u> </u><u>Metals</u><u>:</u>
- Non- metals are bad conductor of electricity ( except Graphite ).
- Non- metals are also bad conductor of heats. ( except diamond )
- Non - metal are neither <u>malleable</u> nor <u>ductile</u>. They are <u>brittle</u>.
- Non-metal are not strong.
- Non-metal are not <u>sonorous</u>.
<u>Some</u><u> </u><u>terms</u><u>:</u>
★ Malleable: This means that metals can be beaten into thin sheets with hammer.
★ Ductile: This means that metals can be drawn into thin wires.
★ Brittle: This means that non-metal break into pieces on hammering.
★ Sonorous: This means capable of producing a ringing sound.
Answer:
C. perpendicular to one another and perpendicular to the direction of wave propagation.
Explanation:
An Electromagnetic wave (EM wave) is a wave having both electric and magnetic components in it. These wave radiates electromagnetic energy while propagating through the space. The electric and magnetic field component of the wave have an angle of 90° to each other aming them perpendicular while they both are perpendicular to the direction of wave propagation as well.
Some examples of EM waves are: UV rays, IR radiation, Radio waves etc. These waves propagate at the speed of light in vacuum.
The displacement of an object is obtained by taking out the area of the rectangle plus the area of the triangle under the line.
<h3>What is acceleration?</h3>
Acceleration is defined as the rate change of velocity with time.
acceleration a = (Δv) / (Δt)
Suppose the initial position of an object is zero, the starting velocity is 3 m/s and the final velocity was 10 m/s. The object moves with constant acceleration.
In velocity time graph, the slope determines the acceleration and the area under the curve gives the value for the displacement.
Thus, the displacement of an object is obtained by taking out the area of the rectangle plus the area of the triangle under the line.
Learn more about acceleration.
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