The specific gravity is the ratio of the substances density to that of water at 4 degrees Celsius. With this, it is conclusive that the density of iron is 7.87 g/cm³. The volume occupied by the iron is the quotient when mass is divided by density,
V = m / D = (7 g) / (7.87 g/cm³) = 0.89 cm³
Therefore, 7 grams of iron occupies approximately 0.89 cm³.
Answer:
ok I think sooo
Explanation:
Velocity and displacement
Answer:
Force is defined as a push or pull acting on an object. Forces include gravity, friction, and applied force. Force causes changes in the speed or direction of motion.
Explanation:
Answer:
(3) 180 m
Explanation:
y = y₀ + vt − ½ at²
where y is the final height,
y₀ is the initial height,
v is the final velocity,
a is acceleration,
and t is time.
Given y₀ = 0 and a = -10.
y = vt + 5t²
At maximum height, v = 0:
y = 5t²
The ball reaches the same height at 4s and 8s, so the peak is in the middle at 6s.
y = 5(6)²
y = 180
The ball reaches a maximum height of 180 m.
Answer:
V = 5.96 m/s
Explanation:
First we find the force required to move the car up the inclined plane. This force shall be equal to the component of the weight of the car that is parallel to the inclined plane. Hence,
F = W Sin θ
F = mg Sin θ
where,
F = Force = ?
m = mass of car = 1600 kg
g = 9.8 m/s²
θ = Inclination Angle = 20°
Therefore,
F = (1600 kg)(9.8 m/s²) Sin 20°
F = 5362.87 N
Now, we use power formula:
P = FV
V = P/F
where,
P = Engine Power = 32000 W
V = Maximum Velocity of Car = ?
Therefore,
V = 32000 W/5362.87 N
<u>V = 5.96 m/s</u>