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4 years ago

Help- The __________ of exercise determines the health and fitness benefit of the exercise.

Physics

2 answers:

Dafna1 [17]4 years ago

7 0

I’m pretty sure it’s intensity

N76 [4]4 years ago

5 0

The type I believe not sure

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Photosynthesis is an endothermic reaction that plants use to store energy from the ______________

inna [77]

I think the answer would be sun they get energy from the sun

6 0

2 years ago

Please help.

Vlada [557]

Answer:

I think it is behavioral

7 0

3 years ago

A piano wire with mass 2.60g and length 84.0 cm is stretched with a tension of 25.0 N. A wave with frequency 120.0 Hz and amplit

likoan [24]

Answer:

Power will be 0.2023 watt

And when amplitude is halved then power will be 0.0505 watt

Explanation:

We have given mass of the Piano wire m = 2.60 gram = 0.0026 kg

Length of wire l = 84 cm = 0.84 m

So mass density $\mu =\frac{m}{l}=\frac{0.0026}{0.84}=0.0031kg/m$

Tension in the wire T = 25 N

Frequency f = 120 Hz

So angular frequency $\omega =2\pi f=2\times 3.14\times 120=753.6rad/sec$

And amplitude A = 1.6 mm = 0.0016 m

We have to find the generated power

Power is given by $P=\frac{1}{2}\sqrt{\mu T}\omega ^2A^2=\frac{1}{2}\times \sqrt{0.0031\times 25}\times 753.6^2\times 0.0016^2=0.2023watt$

From the relation we can see that power $P\ \propto\ A^2$

So if amplitude is halved then power will be $\frac{1}{4}$ times

So power will be equal to $\frac{0.2023}{2}=0.0505watt$

4 0

3 years ago

A block of mass 20kg has a volume of 50m³.calculate the density of the block gkm³

4vir4ik [10]

Answer: 0.4kg/m

Explanation:

5 0

3 years ago

Calculate the average velocity of the cart for each fan speed. Round your answers to the nearest tenth.

serg [7]

<h2>Answer:</h2>

Answers in the explanation

<h2>Explanation:</h2>

The term speed is used to denote distance traveled divided by time. This can be expressed in a mathematical language as follows:

$v=\frac{d}{t} \\ \\ \\ v:speed \\ \\ d:distance \\ \\ t:time$

The cart with Low fan speed:

$v=\frac{500}{7.4} \\ \\ v=67.5675cm/s \\ \\ Rounding \ to \ the \ nearest \ tenth: \\ \\ \boxed{v=67.6cm/s}$

The cart with Medium fan speed:

$v=\frac{500}{6.4} \\ \\ v=78.125cm/s \\ \\ Rounding \ to \ the \ nearest \ tenth: \\ \\ \boxed{v=78.1cm/s}$

The cart with High fan speed:

$v=\frac{500}{5.5} \\ \\ v=90.9090cm/s \\ \\ Rounding \ to \ the \ nearest \ tenth: \\ \\ \boxed{v=90.9cm/s}$

6 0

3 years ago

Read 2 more answers