Answer:
0 J
Explanation:
Gravitational potential energy is:
PE = mgh
where m is mass, g is acceleration due to gravity, and h is the height.
Right before the coin hits the ground, its height above the ground is 0 m, so the potential energy is:
PE = mgh
PE = (0.005 kg) (9.8 m/s²) (0 m)
PE = 0 J
I think the amplitude decreases as the wave goes further away from it's source
Answer:
(a) the magnitude and direction of the electric field in the wire is 4.5 N/C towards the left end of the wire.
(b) the resistance of the wire is 0.1154 Ω
(c) the magnitude and direction of the current in the wire is 27.3 A towards the left end of the wire
(d) the current density in the wire is 4.053 x 10⁸ A/m³
Explanation:
Given;
Length of cylinder = 70cm = 0.7m
radius of cylinder = 1.75 x 10⁻⁴ m
potential V = 3.15 V
resistivity = 1.586 ✕ 10⁻⁸ Ω · m
Part (a) the magnitude and direction of the electric field in the wire
V = E x d
E = V/d
E = 3.15/0.7 = 4.5 N/C towards the left end of the wire.
Part (b) the resistance of the wire
R = 0.1154 Ω
Part (c) the magnitude and direction of the current in the wire
V = IR
I =V/R
I = 3.15/0.1154
I = 27.3 A towards the left end of the wire
Part (d) the current density in the wire
current density,J = current /volume
volume = πr²h = π x (1.75 × 10⁻⁴)² x 0.7 = 6.7357 x 10⁻⁸ m³
J = 4.053 x 10⁸ A/m³
The average human body temperature is around 37 degrees Celsius.
So, this is 72 degrees away from the normal body temp.
Answer:
Properties of minerals are:
B) made of just one substance
C) made of at least two substances
Explanation:
Minerals & their Properties
Minerals are defined as the naturally occurring, solid inorganic chemical compounds. They have an orderly internal structure with definite chemical composition.
Fossils usually contain single or multiple minerals such as Calcite, Quartz, Phosphate etc. Sometimes minerals are visible in the crystalline form in fossils. So, we cannot say that minerals are made of fossils. Instead, fossils can be made of minerals.
According to the prime and standard definition given by scientists, minerals are usually composed of chemical compounds or multiple compounds such a Halite which composed of Sodium and Chlorine elements. But they can be made of just one substance or element.
Now talking about the tiny grains of sand, that are made of minerals. So, instead of saying that minerals are composed of tiny grains of sand, we should say that sand is made of minerals. The most common mineral which forms sand is Quartz. Sand has a versatile mixture of substances besides minerals.
