Answer a) impulse is 1360 kg.m/s
Explanation: impulse is impact force times the time of impact
I = 3400 * 0.4 = 1360kg.m/s
Answer b) final velocity is 10.1m/s
Explanation: impulse is the change of momentum
I = m(v-u)
V and u are final and initial velocities respectively.
1360 = 200 (v - 3.3)
1360 = 200v - 660
V = (1360+660)÷200
V = 10.1m/s
Q2 answer is: astronaut has KE approximately 208 times that of the truck
Explanation :
KE = 0.5mv^2
For truck
KE = 11000 * 33.3^2 = 12197790J
For astronaut
KE = 42 * 7777.7^2 = 2540689926J
Comparing
2540689926/12197790 = 208.2
NB: speed has been converted to m/s by multiplying with 0.28 I.e 1000/3600
Answer:
True
Explanation
When an object slows down the Acceleration is in the other direction which “ slows it down
Answer:
The present day model shows a nucleus composed of protons and neutrons with cloud-like spheres of different diameters surrounding the nucleus to represent the energy levels of the electrons in the atom. Rutherford's model shows electrons orbiting the nucleus along fixed, but similar- diameter circular paths.
Both models show the composition of the nucleus at the center of the atom and the much smaller electrons at some distance from the nucleus.
Explanation:
Neither of the models does a good job of representing the relative size differences of the protons, neutrons and electrons, or the distance between the nucleus and the "electron clouds."
Answer:
C) the reactants have more potential energy than the products.
Explanation:
Time dilation is the slowing of the passage of time at high speeds. The faster the object moves, the greater the amount of time dilation. Time dilation, in part, accounts for the constant speed of light, regardless of the light's source and regardless of the observer's perspective.