Hi there!
Impulse = Change in momentum
I = Δp = mΔv = m(vf - vi)
Where:
m = mass of object (kg)
vf = final velocity (m/s)
vi = initial velocity (m/s)
Begin by converting grams to kilograms:
1 kg = 1000g ⇒ 145g = .145kg
Now, plug in the given values. Remember to assign directions since velocity is a vector. Let the initial direction be positive and the opposite be negative.
I = (.145)(-20 - 17) = -5.365 Ns
The magnitude is the absolute value, so:
|-5.365| = 5.365 Ns
Answer:
Peer Review
Explanation:
When scientist check other scientists the process is dubbed "peer review".
That type of bending is called "diffraction" of waves.
knives, axe ,blades and nails are examples of potential energy
or sharp objects
3. Sand has a low specific heat compared to air
