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natka813 [3]
3 years ago
10

Which of the rolling statement is not true about proper tire care? A. If you see a weaver bar across the width of the tread. B.

properly inflated tired are critical to vehicle control and good gas mileage. C. Tire tread depth can only be checked by a properly trained tire expert. D. Under-inflated tires flex too much and build up heat, which can lead to blowouts.
Physics
1 answer:
skad [1K]3 years ago
7 0
The correct answer should be <span>A. If you see a wear bar across the width of the tread, it's time to change the tire

This is an incorrect sentence because you should change a tire before you see the wear bar. At the time you see the bar, you should've already changed it. </span>
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If the current through a 20-Ω resistor is 8.0 A , how much energy is dissipated by the resistor in 1.0 h ? Express your answer w
marshall27 [118]

Answer:

P(3600)=593.247W

Explanation:

First, let's find the voltage through the resistor using ohm's law:

V=IR=20*8=160V

AC power as function of time can be calculated as:

P(t)= V*I*cos(\phi)-V*I*cos(2 \omega t-\phi)  (1)

Where:

\phi=Phase\hspace{3}angle\\\omega= Angular\hspace{3}frequency

Because of the problem doesn't give us additional information, let's assume:

\phi=0\\\omega=2 \pi f=2*\pi *(60)=120\pi

Evaluating the equation (1) in t=3600 (Because 1h equal to 3600s):

P(3600)=160*8*cos(0)-160*8*cos(2*120\pi*3600-0)\\P(3600)=1280-1280*cos(2714336.053)\\P(3600)=1280-1280*0.5365255751\\P(3600)=1280-686.7527361=593.2472639\approx=593.247W

5 0
3 years ago
What is transferred by a radio wave?
Alex

Answer: B. energy

Explanation:

4 0
3 years ago
Mathematically speaking, the energy of a wave is directionally proportional to the square of the amplitude of the wave Calculate
kenny6666 [7]

The energy of the wave is D) 16.0 units squared

Explanation:

The energy of a wave is directly proportional to the square of the amplitude of the wave.

Mathematically, this can be written as

E\propto A^2

where

E is the energy of the wave

A is its amplitude

For the wave in this problem, the amplitude is

A = 4 units

Therefore, assuming that the constant of proportionality is 1, the energy of this wave is

E=A^2=4^2=16 units squared

Learn more about waves:

brainly.com/question/5354733

brainly.com/question/9077368

#LearnwithBrainly

6 0
3 years ago
Read 2 more answers
Can someone help me please?
KATRIN_1 [288]

Answer:

is this math of science

Explanation:

5 0
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Help 100 points will give brainleyest
Airida [17]

Answer:

B.

Explanation:

The sound waves are compromised. It decrompesses each time which makes the sound gets lower and lower.

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2 years ago
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