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3 years ago

A block slides down a frictionless plane that makes an angle of 24.0° with the horizontal. What is the

Physics

1 answer:

irga5000 [103]3 years ago

7 0

Answer:

F = m g sin theta force accelerating block

m a = m g sin theta

a = 9.8 sin 24 = 3.99 m/sec^2

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Which of the following factors might be affected by a wildfire? a. food b. shelter c. biodiversity d. all of the above Please se

maxonik [38]

Answer: d. all of the above

Explanation:

A wildfire can be either naturally occurring or induced by humans for their own benefit. Is likely to exert a negative impact on the wildlife. A fire is likely to spread quickly to the entire canopy cover of the forest trees. This will destroy the availability of food and other resources. Many birds and animals will loose their habitat or shelter. The destruction of the floral species will cause migration of the faunal species to other locations. Therefore, the biodiversity of the region will be lossed.

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3 years ago

Read 2 more answers

Juan is making ice tea. When he adds ice to the tea, why does the tea cool down?

Tresset [83]

Answer: because the ice was cold, and it melted in the tea. So the tea is now cooler.

Explanation:

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3 years ago

If 200 grams of water is to be heated from 24.0 degrees Celsius to 100.0 degrees Celsius to make a cup of tea, how much heat mus

Colt1911 [192]

Conveniently, some scientists have already figured out how much heat energy it takes to increase the temperature of one gram of water by exactly 1 degree Celsius. That is called the specific heat of water and it's value is 4.184J/g.

So simply multiply the specific heat with the number of grams and the number of degrees C like this:

$heat = 4.184J/g * 200g * 76^o C = 63,596.8J = 63.5968 kJ$

5 0

4 years ago

Suppose that the electric potential outside a living cell is higher than that inside the cell by 0.0677 V. How much work is done

Lina20 [59]

Answer: Recall that

Work (W) = - e × ∆V

Where

Charge of electron= 1.6 × 10^ -19 c

And from the question we were given change in potential as = -0.0677V

Work = - (1.6 × 10^-19) × (-0.0677)

Work= 1.0832 × 10^-20J

Therefore the work done by the electric force when a sodium ion (charge = +e) moves from the outside to the inside is 1.0832×10^-20

6 0

3 years ago

Two loudspeakers S1 and S2, 2.20 m apart, emit the same single-frequency tone in phase at the speakers. A listener L is located

seropon [69]

Answer:

the lowest possible frequency of the emitted tone is 404.79 Hz

Explanation:

Given the data in the question;

S₁ ← 5.50 m → L

↑

2.20 m

↓

S₂

We know that, the condition for destructive interference is;

Δr = ( 2m + $\frac{1}{2}$ ) × λ

where m = 0, 1, 2, 3 .......

Path difference between the two sound waves from the two speakers is;

Δr = √( 5.50² + 2.20² ) - 5.50

Δr = 5.92368 - 5.50

Δr = 0.42368 m

v = f × λ

f = ( 2m + $\frac{1}{2}$ )v / Δr

m = 0, 1, 2, 3, ....

Now, for the lowest possible frequency, let m be 0

f = ( 0 + $\frac{1}{2}$ )v / Δr

f = $\frac{1}{2}$ (v) / Δr

we know that speed of sound in air v = 343 m/s

so we substitute

f = $\frac{1}{2}$ (343) / 0.42368

f = 171.5 / 0.42368

f = 404.79 Hz

Therefore, the lowest possible frequency of the emitted tone is 404.79 Hz

5 0

3 years ago