Answer:
Moro reflex
Explanation:
The baby has a series of reflexes in its first months of life and they are very important for the good development of the little ones. One of them is the Moro Reflex. In this reflection, the baby spreads his arms wide, stretches his legs and extends his neck. Moro's reflex begins from birth and continues until about four months of the baby. It occurs when the baby abruptly shifts position or falls backwards or feels in an insecure position, at which time the baby makes a hug movement by arching his back, extending his legs, throwing his arms out and then bringing his arms. towards the body.
Answer:
it is reduced four times.
Explanation:
By definition, the electric field is the force per unit charge created by a charge distribution.
If the charge creating the field is a point charge, the force exerted by it on a test charge, must obey Coulomb´s Law, so, it must be inversely proportional to the square of the distance between the charges.
So, if the distance increases twice, as the force is inversely proportional to the square of the distance, and the square of 2 is 4, this means that the magnitude of the force exerted on the test charge must be 4 times smaller.
Answer:
a). 1.218 m/s
b). R=2.8![^{-3}](https://tex.z-dn.net/?f=%5E%7B-3%7D)
Explanation:
![m_{bullet}=6.99g*\frac{1kg}{1000g}=6.99x10^{-3}kg](https://tex.z-dn.net/?f=m_%7Bbullet%7D%3D6.99g%2A%5Cfrac%7B1kg%7D%7B1000g%7D%3D6.99x10%5E%7B-3%7Dkg)
![v_{bullet}=341\frac{m}{s}](https://tex.z-dn.net/?f=v_%7Bbullet%7D%3D341%5Cfrac%7Bm%7D%7Bs%7D)
Momentum of the motion the first part of the motion have a momentum that is:
![P_{1}=m_{bullet}*v_{bullet}](https://tex.z-dn.net/?f=P_%7B1%7D%3Dm_%7Bbullet%7D%2Av_%7Bbullet%7D)
![P_{1}=6.99x10^{-3}kg*341\frac{m}{s} \\P_{1}=2.3529](https://tex.z-dn.net/?f=P_%7B1%7D%3D6.99x10%5E%7B-3%7Dkg%2A341%5Cfrac%7Bm%7D%7Bs%7D%20%5C%5CP_%7B1%7D%3D2.3529)
The final momentum is the motion before the action so:
a).
![P_{2}=m_{b1}*v_{fbullet}+(m_{b2}+m_{bullet})*v_{f}}](https://tex.z-dn.net/?f=P_%7B2%7D%3Dm_%7Bb1%7D%2Av_%7Bfbullet%7D%2B%28m_%7Bb2%7D%2Bm_%7Bbullet%7D%29%2Av_%7Bf%7D%7D)
![P_{2}=1.202 kg*0.554\frac{m}{s}+(1.523kg+6.99x10^{-3}kg)*v_{f}](https://tex.z-dn.net/?f=P_%7B2%7D%3D1.202%20kg%2A0.554%5Cfrac%7Bm%7D%7Bs%7D%2B%281.523kg%2B6.99x10%5E%7B-3%7Dkg%29%2Av_%7Bf%7D)
![P_{1}=P_{2}](https://tex.z-dn.net/?f=P_%7B1%7D%3DP_%7B2%7D)
![2.529=0.665+(1.5299)*v_{f}\\v_{f}=\frac{1.864}{1.5299}\\v_{f}=1.218 \frac{m}{s}](https://tex.z-dn.net/?f=2.529%3D0.665%2B%281.5299%29%2Av_%7Bf%7D%5C%5Cv_%7Bf%7D%3D%5Cfrac%7B1.864%7D%7B1.5299%7D%5C%5Cv_%7Bf%7D%3D1.218%20%5Cfrac%7Bm%7D%7Bs%7D)
b).
kinetic energy
![K=\frac{1}{2}*m*(v)^{2}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B1%7D%7B2%7D%2Am%2A%28v%29%5E%7B2%7D)
Kinetic energy after
![Ka=\frac{1}{2}*1.202*(0.554)^{2}+\frac{1}{2}*1.523*(1.218)^{2}\\Ka=1.142 J](https://tex.z-dn.net/?f=Ka%3D%5Cfrac%7B1%7D%7B2%7D%2A1.202%2A%280.554%29%5E%7B2%7D%2B%5Cfrac%7B1%7D%7B2%7D%2A1.523%2A%281.218%29%5E%7B2%7D%5C%5CKa%3D1.142%20J)
Kinetic energy before
![Kb=\frac{1}{2}*mb*(vf)^{2}\\Kb=\frac{1}{2}*6.99x10^{-3}kg*(341)^{2}\\Kb=406.4J](https://tex.z-dn.net/?f=Kb%3D%5Cfrac%7B1%7D%7B2%7D%2Amb%2A%28vf%29%5E%7B2%7D%5C%5CKb%3D%5Cfrac%7B1%7D%7B2%7D%2A6.99x10%5E%7B-3%7Dkg%2A%28341%29%5E%7B2%7D%5C%5CKb%3D406.4J)
Ratio =![\frac{Ka}{Kb}](https://tex.z-dn.net/?f=%5Cfrac%7BKa%7D%7BKb%7D)
![R=\frac{1.14}{406.4}\\R=2.8x10^{-3}](https://tex.z-dn.net/?f=R%3D%5Cfrac%7B1.14%7D%7B406.4%7D%5C%5CR%3D2.8x10%5E%7B-3%7D)
The chemical energy in Jay's body, to kinetic energy in the car
Answer: work must be done on the system (Option A)
Explanation:
The second law of thermodynamics is the fundamental law of nature; it states that energy can be transferred from cold objects to hot objects only, if work is done on the system. If energy is added to the system then as a result the thermal energy would increase. Second law of thermodynamics is used to determine whether a process is spontaneous or not. Moreover,the second law of thermodynamics is also used in refrigerators.