Answer:
1.22kg
Explanation:
info given:
height (h) = 7.25m
g = 9.81m/s^2
PE = mgh
Plug in info and solve for m.
m(9.81m/s^2)(7.25m) = 87.4J
m = 1.22kg
K.E = ½ mv²
Explanation:
The formula of Kinetic Energy
K.E = ½ mv²
Where,
m = mass of object
v = velocity of object
The <u>Standard Unit</u> of kinetic energy is <u>Joule</u>, while the <u>Imperial Unit</u> of kinetic energy is <u>foot-pound</u>
<u>-TheUnknown</u><u>Scientist</u>
D.<span>by dots that are all the same length
Hope this helped!</span>
Answer:
b) the potential difference across each is the same.
Explanation:
When resistors are connected in parallel with each other
then the terminals of all the resistors will connected across the terminals of the battery
So we know the potential difference of the battery is same across all the resistors
So we can say that the equivalent resistance of all the resistance is

so its not the mean of all resistors
also we know that the resistance are all different so power across each resistance is different given as

also current in each resistance is also different and given by

so correct answer will be
b) the potential difference across each is the same.
In a collision an object experiences impulses, this impulse can be determined by the product of net force exerted upon it in the specific course of time.
<u>Explanation:</u>
An object experiences impulse due to the force exerted upon it in a particular time period.
i.e.

Where,
F - Force acted upon the object
- time interval for which the force act
According to the definition of Impulse, it is the integral of force (F) that acts upon any object over a time interval ∆t. It produces an equivalent change in the momentum and that too in the same direction as of the applied force (F).
Therefore, in order to find the impulse on an object, we have to find the force acted on it in a specific time interval.