Answer:
When the velocity of an object changes it is said to be accelerating. Acceleration is the rate of change of velocity with time. ... Acceleration occurs anytime an object's speed increases or decreases, or it changes direction.
Answer:
35 N to the right.
Explanation:
450 is going to the right so you subtract what is going against it. Which gives you 35. And because 450 is bigger than 415, it'll be going to the right.
Answer:
14009. 72 kgms^-1
Explanation:
Momentum is the product of an objects mass and velocity
Answer:
The Lambda-CDM model contains a cosmological constant, denoted by a lambda (λ), which is associated with dark energy and <u>cold dark matter</u>.
^Also works for Plato users.
Answer:
![7.0\cdot 10^{-13}C](https://tex.z-dn.net/?f=7.0%5Ccdot%2010%5E%7B-13%7DC)
Explanation:
The magnitude of the electrostatic force between two charged objects is
![F=k\frac{q_1 q_2}{r^2}](https://tex.z-dn.net/?f=F%3Dk%5Cfrac%7Bq_1%20q_2%7D%7Br%5E2%7D)
where
k is the Coulomb's constant
q1 and q2 are the two charges
r is the separation between the two charges
The force is attractive if the charges have opposite sign and repulsive if the charges have same sign.
In this problem, we have:
is the distance between the charges
since the charges are identical
is the force between the charges
Re-arranging the equation and solving for q, we find the charge on each drop:
![F=\frac{kq^2}{r^2}\\q=\sqrt{\frac{Fr^2}{k}}=\sqrt{\frac{(9.0\cdot 10^{-9})(7\cdot 10^{-4})^2}{8.99\cdot 10^9}}=7.0\cdot 10^{-13}C](https://tex.z-dn.net/?f=F%3D%5Cfrac%7Bkq%5E2%7D%7Br%5E2%7D%5C%5Cq%3D%5Csqrt%7B%5Cfrac%7BFr%5E2%7D%7Bk%7D%7D%3D%5Csqrt%7B%5Cfrac%7B%289.0%5Ccdot%2010%5E%7B-9%7D%29%287%5Ccdot%2010%5E%7B-4%7D%29%5E2%7D%7B8.99%5Ccdot%2010%5E9%7D%7D%3D7.0%5Ccdot%2010%5E%7B-13%7DC)