<span>5.82 x 10-49 joules7.62 x 10-19 joules8.77 x 10-12 joules1.09 x 10-12<span> joules </span><span>answer is b</span></span>
Answer:
<u>velocity of swimmer relative to ground = 3 i -5 j</u>
Explanation:
- To cross a river the swimmer swims relative to river in perpendicular direction.
Velocity of river = -5 j (south)
Velocity of swimmer relative to river = 3 i(north)
So
<h2>
Velocity of swimmer relative to ground = Velocity of swimmer relative to river + Velocity of river</h2>
Velocity of swimmer relative to ground = 3 i -5 j
So magnitude of total velocity is
=
= 
Displacement is the change in position
Answer:
The forces that do non-zero work on the block are gravity and normal reaction force
Explanation:
Complete Question:
Which process is not required for an animal to obtain energy from food?
a. Secretion.
b. Digestion.
c. Excretion.
d. Ingestion.
Answer:
c. Excretion.
Explanation:
Excretion is a metabolic process in which living organisms gets their system rid of metabolic waste, water and excess ions. This is usually done with the aid of kidney, skin and lungs in all vertebrates.
Example of excretions are urination, sweating and defecation.