Answer:
(a)
(b) It is moving at 14 m/s.
Explanation:
(a)
Given:
The energy, , of an object moving with a velocity is given as:
, where, is its mass.
Multiplying both sides by 2, we get
Now, divide both sides by
Taking square root both sides, we get
Therefore, in terms of and is given as:
(b)
Using the above formula,
Plug in 4900 joules for and 50 kg for . Solve for . This gives,
Therefore, it is moving with a speed of 14 m/s.
Answer:
The body reading on the scale will increase.
Explanation:
The scale reading will definitely increase due to buoyancy of the ball. According to Archimedes' law which states that the magnitude of buoyancy force on the body is the same as the weight of the liquid which is pushed out when submerging the body. Therefore, the body reading on the scale will increase.
Answer:
Explanation:
= Rate at which the distance between A and starting point of B is changing = -20 km/h
= Rate at which the distance of B is changing = 15 km/h
= Rate at which the distance between A and B is changing
Time after which the rate at which the distance between A and B is changing is 4 hours
Distance covered by A in 4 hours =
a = Distance remaining to the start point of B =
b = Distance covered by B in 4 hours =
Distance between A and B after 4 hours
Differentiating with respect to time we get
The rate at which the distance between the ships is changing at 4 PM is .
Answer:
Explanation:
Hundreds of different species of "good" bacteria play a very important role in our health by processing fiber and producing certain vitamins, such as B vitamins, vitamin K, and other nutritive substances. The health-promoting bacteria are called probiotics and are normal inhabitants of the human gastrointestinal tract.
Jj thomas' model contained electrons.
The current model contains a nucleus with electrons orbiting around it. :)