Answer:
The instantaneous velocity is the specific rate of change of position (or displacement) with respect to time at a single point (x,t) , while average velocity is the average rate of change of position (or displacement) with respect to time over an interval.Average velocity : Average velocity of a body is defined as the change in position or displacement (Δx) divided by time interval (Δt) in which that displacement occurs.
Instantaneous velocity : The instantaneous velocity of a body is the velocity of the body at any instant of time or at any point of its path .
velocity can be positive , negative or zero.
By studying speed and velocity we come to the result that at any time interval average speed of an object is equal or more than the average but instantaneous speed is equal to instantaneous velocity.
Answer:
<h2>1567.09 N/m</h2>
Explanation:
Step one:
given data
mass m=5kg
compression x= 3.13cm to m= 0.0313m
<em>According to Hooke's law, provided the elastic limit of an elastic material is not exceeded the extension e is directly proportional to the applied force</em>
F=ke
where
k= spring constant in N/m
e= extension/compression in
Step two:
assume g= 9.81m/s^2
F=mg
F=5*9.81
F=49.05N
substitute in the expression F=ke
49.05=k*0.0313
k=49.05/0.0313
k=1567.09 N/m
<u>The force constant (in N/m) of the spring is 1567.09 N/m</u>
Answer:
A. negative; virtual.
Explanation:
A concave lens always forms a virtual erect and diminished image. The reason why is that the image is actually formed by the intersection of virtually extended refracted rays.
Hope this helps!
Please mark as brainliest if correct!
Answer:
she had socks one and was shuffeling so she had static
Explanation:
I think the conductive heat loss is proportional to the DIFFERENCE
between the inside and outside temperatures. In other words, if it's the
same temperature inside and outside, then no matter what that temperature
is, no heat flows through the walls of the house in either direction.
You said it's 20° outside, and you turn the thermostat down from 70° to 60°.
So you'd be reducing the DIFFERENCE between the inside and outside
temperatures from 50° to 40°.
From 50 to 40 is a decrease of (10/50) = 20%. So your heat loss ... and
the amount that gets added to your heating bill ... becomes 20% less for
each hour that the inside and outside temperatures stay like this.
