Answer:
Explanation:
Given that,
Mass of astronaut
M = 62kg
Mass of wrench
m = 3.3kg
Speed at which wrench move away from the capsule
v = 20.5m/s
Speed of astronaut?
Let speed of astronaut be V
Since there is no external force, we would apply conservation of momentum
Momentum of the astronaut is equal to the momentum of the wrench
Momentum is given as
P = Mass × Velocity
P(astronaut) = P(wrench)
M×V = m×v
V = m×v/M
V = 3.3×20.5/62
V = 1.09 m/s
The astronaut speed is 1.09m/s
Answer:
the element that takes part in a chemical reactions
there are usually two or more reactants in chemical reactions
except decomposition reactions
Answer:
- Which of the following does not move as a transverse wave?
<em>B. sound waves</em>
because sound waves are longitudinal waves having compressions and rare factions.
Which of these effects describes the change in pitch we hear
moving motorbike goes past?
<em>D</em><em>.</em><em> </em><em>Doppler</em><em> </em><em>eff</em><em>ect</em>
Doppler effect is the phenomenon where there is apparent change in frequency (pitch) and wavelength of a wave due to relative motion of the sound source.
Which of the following does not make use of total internal reflection.
<em>B</em><em>.</em><em> </em><em>Endos</em><em>cop</em><em>e</em>
Endoscope doesn't use total internal reflection since no refraction takes place.
Answer:
A.
Explanation:
an atom that has most of its mass is electrons.
Answer:
A
Explanation:
This is because distance traveled (i.e. displacement) is the integral of the velocity function, and velocity is the first derivative of the displacement function. To put this in perspective, the area bounded by a curve can be found by taking the integral of the equation of the curve, taking values on the x-axis as limits.
