I hope this helps
velocity is the rate and speed of an objects moving.
Speed is the time rate an object is moving along a path
To find information, the would take DNA tests.
Answer:
w = 4.712 10⁻³ rad / s
Explanation:
For this exercise, the time it takes for the bullet to travel the distance of 2R must be equal to the time that the hole must travel half a circle.
Let's start by calculating the time it takes for the bullet, which is going at constant speed.
v = x / t
t = x / v
t = 2R / v
t = 2 0.10 / 300
t = 6.666 10⁻⁴ s
As they ask that a single hole is formed in this time, it must be rotated half a circle, that is, θ =π rad, for which we use the angular scientific relations, where the shell has constant angular velocity
w = θ / t
w = π / 6,666 10⁻⁴
w = 4.712 10⁻³ rad / s
Answer: C
1054 g
Explanation:
Given that the object is in the shape of semi sphere with diameter of 8.2cm. And density of 7.3g/cm^3.
From definition of density,
Density = mass/volume
Volume of a half - sphere = 2/3πr^3
Volume = 2/3 × 3.143 × 4.1^3
Volume = 144.35 cm^3
Let make mass the subject of formula
Mass = Density × volume
Mass = 7.3 × 144.35
Mass = 1053.74g
The mass of the paperweight, in grams is 1054
Answer:
Convective heat transfer is the transfer of heat between two bodies by currents of moving gas or fluid. In free convection, air or water moves away from the heated body as the warm air or water rises and is replaced by a cooler parcel of air or water.
Explanation:
Hope this helped and have a great day
