Answer:
If we assume that the box is a cube with 150 m² surface area
Area of 1 face = 150 m² / 6 = 25 m²
The box will exert a downward force of
Force = mass * acceleration due to gravity
Force = 300 kg * 9.81 m/s² N
Force = 2943 N
The box exerts a pressure ( force / unit area) = 2943 N / 25 m²
Pressure = 117.7 N/m²
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The correct answer is
<span> 4. protons are positively charged.
In fact, the direction of the electric field of a charged particle depends on the sign of the charge of the particle. While a negatively charged particle (such as the electron) produces an electric field that points toward the charge, a positively charged particle (like a proton) produces an electric field that points away from the charge. This can be proofed by using a positive test charge: if we put a positive test charge near a proton, this test charge will move away from the proton (because it is repelled from it, since they have same charge), and the direction of its motion gives the direction of the electric field generated by the proton, so away from it.</span>
Answer:
Combinations of SI units that are used to measure quantities such as speed, volume, and pressure are called derived units.
Answer:
option C.
Explanation:
As the spring is fully compressed means that velocity of the object will be zero.
If the velocity of the object is zero then KE will also be zero.
If Kinetic energy is zero Elastic potential energy will be maximum because energy is conserved in this system.
Gravitational PE will be zero because spring will be at the datum.
So, the correct answer will be equal to zero, maximum, zero.
Hence, the correct answer is option C.