Which situation describes the highest rate of power

Physics

2 answers:

krok68 [10]3 years ago

8 0

Answer:

B. An engine does 100 joules of work in 2 seconds.

Explanation: I hope u get it right.

Andreyy893 years ago

8 0

Answer: A king

Explanation: A king has a everything he needs to live as long as he lives

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In this lab, you will use a dynamics track to generate collisions between two carts. If momentum is conserved, what variable cha

BartSMP [9]

In collision type of problems since momentum is always conserved

we can say

$m_1v_{1i} + m_2v_{2i} = m_1 v_{1f} + m_2v_{2f}$

So here along with this equation we also required one more equation for the restitution coefficient

$v_{2f} - v_{1f} = e(v_{1i} - v_{2i})$

so above two equations are required to find the velocity after collision

here the change in velocity occurs due to the contact force while they contact in each other

so this is the impulse of collision while they are in contact with each other while in collision which changes the velocity of two colliding objects

8 0

3 years ago

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An air-track cart is attached to a spring and completes one oscillation every 5.67 s in simple harmonic motion. at time t = 0.00

Masteriza [31]

The cart is moving by simple harmonic motion, and its position at time t is described by
$x(t) = A \cos (\omega t)$
where
A is the amplitude of the oscillation
$\omega$ is the angular frequency

The amplitude of the oscillation corresponds to the maximum displacement of the spring, which corresponds to the initial position where the spring was released:
A=0.250 m

The period of the motion is T=5.67 s, and the angular frequency is related to the period by
$\omega = \frac{2 \pi}{T}= \frac{2 \pi}{5.67 s} =1.11 rad/s$

Therefore now we can calculate the position of the system at the time t=29.6 s:
$x(29.6 s)=(0.250 m)\cos ((1.11 rad/s)(29.6 s))=+0.033 m$

3 0

3 years ago

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hi:) is displacement time graph the same as distance time graph? if nope, then what’s the difference?

Illusion [34]

A displacement time graph is able to show if an object is going backwards or forwards for example usually a line with a negative gradient means going backwards (or back to the start) This CAN’T be shown on a distance time graph

A distance time graph shows how far an object has traveled in a given time
So for example...

Distance is plotted on the Y-axis
Time is plotted on the X-axis

So not they are not the same, hope this helped :)

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3 years ago

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2. Imagine now that one tried to repeat the same measurement, but between the time that the warm water was measured and the time

Svetllana [295]

Answer:

The final temperature is 64.28°C.

Explanation:

Imagine now that one tried to repeat the same measurement, but between the time that the 400 cm³ of warm water was measured at 88°C and the time it was mixed with the 130 cm³ of cooler water at 15°C, the warmer water had lost 3060 cal to the environment. Calculate the final equilibrium temperature assuming no heat loss after mixing occurs.

Let the temperature of hot water before mixing is t

We need to calculate the temperature

Using formula of energy

$Q=mc\Delta t$