What increases as the temperature of a solid object rises?

Michael is biking on a trail and is accelerating at a rate of 1.2 m/s/s for 15 seconds. He began this part of his ride with a ve

Serhud [2]

Answer:

Michael's final velocity is 19.62 m/s.

Explanation:

We can find the final velocity of Michael by using the following kinematic equation:

$v_{f} = v_{0} + at$ (1)

Where:

$v_{f}$ : is the final velocity =?

$v_{0}$ : is the initial velocity = 1.62 m/s

a: is the acceleration = 1.2 m/s²

t: is the time = 15 s

By entering the above values into equation (1) we have:

$v_{f} = 1.62 m/s + 1.2 m/s^{2}*15 s$

$v_{f} = 19.62 m/s$

Therefore, Michael's final velocity is 19.62 m/s.

I hope it helps you!

7 0

3 years ago

Hii:) I need help with qn 1 & please explain if possible too :) , thanks!

andrezito [222]

1. In the first 1.5 seconds, the lift accelerates from 0 to 3m/s. By definition, the acceleration is the ratio between the change in velocity and the time elapsed to change the velocity.

The change in velocity is $\Delta v = v_{\text{final}}-v_{\text{initial}}=3-0=3$ .

The time elapsed is 1.5 seconds, so the acceleration is

$a = \dfrac{3}{1.5}=2$

meters per second squared.

2. We know, from the previous point, that the lift travelled 20m from the first floor. Since it returns to the first floor after the ascent, it must travel again those same 20m, just in reverse (descending instead of ascending). So, the total distance travelled is $20+20=40$ meters.

The displacement, though, is zero, because it measures the distance between the starting and ending point of a certain motion. Since the lift starts and ends its motion at the same place (the first floor), its total displacement is zero.

3 0

3 years ago

For a 1 efficient step down transformer voltage in primary and secondary are equal current in primary and secondary are equal in

Fynjy0 [20]

The given condition for a 100% efficient step down transformer is not true.

<h3>How do Step-down Transformers work?</h3>

Because there are fewer turns in the secondary winding of a step-down transformer, the secondary voltage is lower than the initial voltage. As a result, this kind of transformer is employed to reduce the voltage to the levels intended for the circuit. Almost all power supply incorporate a step-down transformer to keep the operating voltage range of the circuit within acceptable limits. Electronic transformers and distribution systems are often where these transformers are installed (power transformers).

<h3>What Does a Step-Down Transformer Mean by Power?</h3>

Using the system voltage and current, we can calculate the power of a transformer. Volt-Amps, or VA, is the unit used to measure the power in a transformer (for larger transformers Kilo Volt-Amps, kVA).

Any transformer should, in theory, have constant power on both sides, which implies that the power available on the secondary side of the transformer should match the power available on the primary side. This also applies to step-down transformers. A step-down transformer's secondary side has a lower voltage than its primary side, hence in order to balance the transformer's total power, the secondary current would need to be increased.

<h3>What is the Step-Down Transformer's Relationship Between Voltage and Current?</h3>

In a step-down transformer, the output current is greater than the input current while the output voltage is lower than the primary voltage.

To know more about step down transformer visit:

brainly.com/question/7551270

#SPJ4

5 0

2 years ago

Name the property of bodies to resist a change in their velocity.

brilliants [131]

Answer:

inertia

Explanation: