How do I do these?
Draw a free-body diagram for each of the following objects?
a. a projectile in motion in the presence of air resistance
b. a rocket leaving the launch pad with its engines operating
c. a heavy crate being pushed across a rough surface
a. mg is down, Ff is opposite the direction of the projectile.
b. mg is down, Fthrust is up
c. mg is down, F is forward, Ff is backward.
cathy is carrying out an experiment.jon is holding an copper rod and cathy is holding a glass rod
they sick them into a bunsen burner which one would heat first
Want a answer
Based on the information provided, the copper rod would heat first compared to the glass rod. Copper is a better conductor of heat compared to glass, so it will absorb and transfer heat more efficiently. Therefore, when both rods are subjected to the flame of the Bunsen burner, the copper rod will heat up faster.
To determine which rod would heat first when exposed to a Bunsen burner, you need to consider the conductivity of both the copper and glass rods. Copper is an excellent conductor of heat, while glass is a poor conductor.
To conduct this experiment, you would follow these steps:
1. Hold the copper rod and the glass rod with Jon and Cathy respectively.
2. Bring both rods close to the Bunsen burner flame without touching.
3. Observe and record which rod heats up first.
The copper rod is expected to heat up faster compared to the glass rod because of its excellent heat conductivity. Copper quickly transfers heat from the flame to the rod, causing it to become hot. On the other hand, the glass rod is a poor conductor, so it would take more time for the heat to transfer through the glass.