Answer:
Impulse of force = -80 Ns
Explanation:
<u>Given the following data;</u>
Mass = 50kg
Initial velocity = 1.6m/s
Since she glides to a stop, her final velocity equals to zero (0).
Now, we would find the change in velocity.
Substituting into the equation above;
Change in velocity = 0 - 1.6 = 1.6m/s
Substituting into the equation, we have;
<em>Impulse of force = -80 Ns</em>
<em>Therefore, the impulse of the force that stops her is -80 Newton-seconds and it has a negative value because it is working in an opposite direction, thus, bringing her to a stop. </em>
Answer: Option (a) is the correct answer.
Explanation:
Photosynthesis is defined as a chemical process in which plants tend to make their own food in the presence of sunlight, water and carbon dioxide.
During this process, product formed by the plants is glucose and oxygen.
The chemical reaction equation for photosynthesis is as follows.
Therefore, we can conclude that out of the given options the correct equation is as follows.
d. both a and b
Explanation:
Seismic waves are both transverse and compressional or longitudinal waves.
A seismic wave is an elastic wave that causes a sudden disturbance in earth materials.
- Seismic waves are both longitudinal and transverse waves.
- There are two main types of seismic waves which are the surface and body waves.
- The surface waves runs on the earth surface. These are the rayleigh and love waves.
- The surface waves causes damages on the earth surface as they are both longitudinal and transverse.
- Body waves moves within the earth surface. They are p-waves and s-waves.
- P-waves are longitudinal or compressional waves that propagates within the earth surface.
- S-waves are transverse waves that moves perpendicularly to their direction of propagation.
Learn more:
Seismograph brainly.com/question/11292835
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Answer:
net work done by friction = - 2205 J
Explanation:
given,
mass of sled = 80 kg
slide down at an angle of 18°
length = 90 m
travel horizontally = 20 m before starting back up a 16° incline.
net work = ?
net work done by friction = change in potential energy
= mg (h_f - h_i)
= (75) (9.8) (- 27.81 + 24.81)
net work done by friction = - 2205 J
Answer:
ampere = 15.95 mA
Explanation:
given data
deposit gold = 0.560 g
time = 4.70 hour = 16920 s
solution
we get here moles of gold that is
moles of gold = 0.560 g ÷ 196.967 g/mol
moles of gold = 0.0028
moles of gold = 0.0028 ( 1 Faraday / 1 mol )
moles of gold = 0.0028 Faradays
moles of gold = 0.0028 Faradays × 96500 Coulom/ faraday
moles of gold = 270.2 coulombs
and we get here ampere that is
ampere = 
ampere = 0.01596 A
ampere = 15.95 mA
