Answer:
a = 17.81 m/s²
Explanation:
Given that,
Shaun and his friend give Shirley a big shove all at once, applying a force of F=980 N
Let us assume that the mass of Shaun and his friend is 55 kg.
Let a is the acceleration during this shove.
The second law of motion is given by :
F = ma
![a=\dfrac{F}{m}\\\\a=\dfrac{980}{55}\\\\=17.81\ m/s^2](https://tex.z-dn.net/?f=a%3D%5Cdfrac%7BF%7D%7Bm%7D%5C%5C%5C%5Ca%3D%5Cdfrac%7B980%7D%7B55%7D%5C%5C%5C%5C%3D17.81%5C%20m%2Fs%5E2)
So, the acceleration of Shirley is 17.81 m/s².
Answer: A sealed calorimeter is a closed system because thermal energy is not transferred to the environment.
A closed system is an isolated system where there is no transfer of energy with its surroundings. Also the system is not subjected to any external force whose source is external to the system.
The answer is D. A more reactive metal replaces a less reactive metal in a chemical reaction.
Answer:
a:it speed up
b:it should be positive since final
velocity is larger than initial velocity
c:acceleration is approximately 4.5
m/s^2
Explanation:
initial velocity=u=4.47m/s
Final velocity=v=17.9m/s
Time=t=3 seconds
a:the car speed up since the velocity
increased
b:change in velocity is positive
because final velocity is larger than
initial velocity
17.9-4.47=13.43 m/s
c: acceleration=(v-u)/t
acceleration=(17.9-4.47)/3
acceleration=13.43/3
acceleration=4.5 m/s^2
Answer:
The two different types of space probes are lunar and solar. Lunar probes photograph the moon’s surface. Solar probes (a famous one is the Parker Solar Probe) trace the flow of energy that heats and the solar increases corona and solar wind, decide the structure and dynamics of the plasma and magnetic fields at the origin of the solar wind. Explore mechanisms that accelerate and transport energetic particles.
Explanation: