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2 years ago

What is a difference between orange trees and cypress trees?

Physics

2 answers:

dexar [7]2 years ago

5 0

The 3rd one. That says an orange tree has seeds in fruit and a cypress tree has seeds in a cone

nikitadnepr [17]2 years ago

4 0

An orange tree has seeds inside a fruit and a cypress tree has seeds inside a cone

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With two identical light bulbs and two identical batteries how would you arrange in order to get the maximum total power to the

Norma-Jean [14]

Answer:

The batteries would be connected in series while the bulbs would be connected in parallel

Explanation:

Power (W) = VI

where V = voltage, I = current and R = resistance

from V = IR , I = V/R

Power (W) now becomes = V (V/R) = $\frac{V^{2} }{R}$

Power (W) = $\frac{V^{2} }{R}$

from the above equation, power is directly dependent on voltage, hence the voltage has to be high for the power to be high and the power is also inversely dependent on the resistance (in this case the bulbs which act as the load)

We have to batteries, when batteries are connected in series the total voltage becomes the summation of the two voltages hence giving a higher voltage and when they are connected in parallel their voltage remains the same. Since we want to get higher voltage we will connect the two batteries in series.
we have two bulbs which are the resistance here, from the equation above the power is inversely dependent on the resistance so we would need its value to be minimal. When resistance is connected in series the resistance individual will be added to get the total resistance, hence the total resistance will be high but when the resistors are arranged in parallel you get the total resistance by applying the formula $\frac{R1R2}{R1+R2}$ which will give us a lower resistance. Hence we would connect the bulbs in parallel.

Take note that the power from this connection should not exceed the bulbs power rating so as to avoid damage of the bulbs.

4 0

3 years ago

Answer ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

ikadub [295]

$\sf \huge \purple{ Question : - }$

Initial velocity of a car is 36 km/h . Find the distance after min, if it goes with acceleration 2 m/s².

$\sf \huge \color {gold}{ AnSwer :- }$

Initial velocity, u = 36 km/h

$\sf u = 36 \times \dfrac{5}{18} {ms}^{ - 1} = 10 {ms}^{ - 1}$

Time, t = 1min

t = 60s

Acceleration, a = 2m/s²

Apply 2nd equation of motion

$\longrightarrow \sf s = ut + \dfrac{1}{2} at ^{2} \\ \\ \longrightarrow \sf s =(10)(60) + \frac{1}{2} (2)(60) {}^{2} \\ \\ \longrightarrow \sf s =600 + 3600 \\ \\ \longrightarrow \sf \blue{ s =4200m} \: \: \large \blue \star$

6 0

3 years ago

A truck travels up a hill with a 5.4° incline. The truck has a constant speed of 25 m/s. What is the horizontal component of the

goldenfox [79]

Answer:

$v_{x}=24.88m/s$

$v_{y}=2.35m/s$

Explanation:

Knowing that the truck travels up a hill with a 5.4º incline

The horizontal component of the truck's velocity is:

$v_{x}=vcos\beta=(25m/s)cos(5.4)=24.88m/s$

The vertical component of the truck's velocity is:

$v_{y}=vsin\beta=(25m/s)sin(5.4)=2.35m/s$

8 0

3 years ago

Does sound travel faster in a warm room or a cold room? Explain your answer.

Natasha_Volkova [10]

Answer:

The speed of sound is greater in hot air than it is in cold air. This is because the molecules of air are moving faster and the vibrations of the sound wave can therefore be transmitted faster. This means that when sound travels from hot air to cold air or from cold air to hot air it will refract.

Explanation:

Hope this will be help!

5 0

3 years ago

Read 2 more answers

A projectile is thrown with an initial speed of 20 m/s at an angle 30 degrees above

ZanzabumX [31]

Initial velocity u = 20 m/s

Initial horizontal velocity = 20 cos30° = 20 * 0.866 = 17.32 m/sec.

Initial vertical velocity = 20 sin30° = 20 * 1/2 = 10 m/sec.

time taken t = u/g = 10/10 =1 sec. ( approximating g to 10m/sec^2)

Maximum height h = ut + 1/2 * g * t^2

h = 10 *1 - 1/2 * 10 * 1* 1

h = 10 - 5 = 5 metres.

Total time in air = 2t = 2 seconds.

4 0

2 years ago