<h3>Answer</h3>
Tools that magnify objects Tools that don't magnify objects
magnifying glass rule
telescope binoculars
microscope
<h3>Explanation</h3>
radio dish: is use to receive radio waves from the air.
binoculars: provide a magnified stereoscopic view of distant objects.
streak plate: is a technique which is used to grow bacteria on a growth media surface so that individual bacterial colonies are isolated and sampled.
wind vane: is used to determine wind direction.
ruler: is used for measuring a line.
microscope: is used to magnify the objects which are not visible by naked eyes.
magnifying glass: is used to magnifying tiny objects which are difficult to see yet they are visible.
telescope: use by space scientist to examine astronomical event that may take place in the sky which is too far.
Answer:
13.1 m/s
Explanation:
Given that a baseball is tossed up into the air at an initial velocity 18 m/s. The height of the baseball at time t in seconds is given by h(t) = 18t−4.9t 2 (in meters).
a) What is the average velocity for [1,1.5]?
To calculate the velocity travelled by the ball, differentiate the function.
dh/dt = 18 - 9.8t
Substitute t for 1 in the above Differential function
dh/dt = 18 - 9.8 (1)
But dh/dt = velocity
V = 18 - 9.8
V = 8.2 m/s
Average velocity = ( U + V ) / 2
Average velocity = (18 + 8.2)/2
Average velocity = 26.2/2
Average velocity = 13.1 m/s
Experiments and fieldwork
Answer:
1. Mass
2. Height
3. Gravitational Force Field
Explanation:
The three factors that decide how much gravitational potential energy a body has are: 1) The mass of the body itself, 2) The relative height at which the body is, because gravitational force varies with height i.e distance away from earth surface. 3) and finally the strength of the gravitational field the body is in.
