Answer:
.641
Explanation:
trust me bro accellus doesnt lie
Answer:
Ping Pong ball move at velocity 160.4 m/s
Explanation:
given data
mass m1 = 7 kg
velocity v1 = 3 m/s
mas m2 = 2.45 g = 2.45 ×
kg
same kinetic energy
to find out
How fast Ping Pong ball move (v2)
solution
we know same KE
so
...........1
so v2 will be
v2 =
.............2
put here value in equation 2 we get v2
v2 =
v2 = 160.4
so Ping Pong ball move at velocity 160.4 m/s
The object with the greater mass should be attached to the spring with the smaller spring constant, so that the resulting spring-object system has the greatest possible period of oscillation.
Answer: Option D
<u>Explanation:
</u>
According to the simple harmonic motions, from physics, it gives a relation between deformation force and the deflection. The more deflection results in more time period of oscillation.
F = - k x
where ‘k’ is the spring constant, and ‘F’ is the deformation force.
So, deflection is directly proportionate to forces, and inversely proportionate to its spring constant. Hence, we can derive that the force must be maximum, and hence weight must be maximum, with the spring constant lesser. Then, the deflection will be high. So, time period increases.
Answer:
59.19%
Explanation:
Step 1:
Data obtained from the question. This include the following:
Input temperature = 495 K.
Output temperature = 293 K.
Efficiency =..?
Step 2:
Determination of the efficiency of the engine.
Efficiency is simply defined as the ratio of output to input times 100. Mathematically, it is expressed as:
Efficiency = output /input x 100
With the above formula, we can calculate the efficiency of the engine as follow:
Input temperature = 495 K.
Output temperature = 293 K.
Efficiency =..?
Efficiency = output /input x 100
Efficiency = 293/495 x 100
Efficiency = 59.19%
Therefore, the efficiency of the engine is 59.19%