Answer:
17.0 m s^-1
Explanation:
This question can be answered using suvat equations: (I'm assuming you know what these are)
s = 34.0 m
u = 0
v = ?
a = N/A
t = 4.00s
The only suvat equation that doesn't contain "a" is s = (u+v/2)t.
Make "v" the subject so v = 2s/t.
v = (2 x 34.0)/4.00 = 17 m/s
Explanation:
Let 'F' be force acting perpendicularly, 'A' be the area and 'P' be the pressure exerted.
Then,
Pressure is directly proportional to the the force acting perpendicularly i.e.
P ∝ F ............. (i)
Pressure is inversely proportional to the area on which force acts i.e.
P ∝ 1/A ........... (ii)
Combining equations (i) and (ii),
P ∝ F/A
or, P = K × F/A [where K is a constant]
If F is 1N, A is 1m² and P is 1 N/m², then K is 1.
So, P = F/A proved...
Answer:
A) Cold object will start getting hot
B) Heat exchange will stop as the two object acquire the same temperature.
Explanation:
A) When one hot object and one cold object are kept in contact then the heat is transferred from the hot object to the cold object via different modes of heat transmission. Hence, the cold object starts getting hot
B) The transmission of heat from the hot object to the cold object will stop as the temperature of the two object becomes equal to each other.
Answer:
The ring of fire is caused by the subduction of pacific plates under the continental plates. In geology subduction is a process that happens as the one of tectonic plates move under the other and the gravity force it to sink into the mantle.
Explanation:
An object with more mass has more kinetic energy than an object with less mass, if both objects are moving at the same speed. <em>(c)</em>