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EastWind [94]
3 years ago
15

Which best describes a graph of voltage over time for DC current?

Physics
1 answer:
lana [24]3 years ago
7 0

Answer:it is straight, horizontal line

Explanation:

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A machine does 500 j of work in 20 sec. What is the power of this machine?
NNADVOKAT [17]

Explanation:

P=W/t

P=500/20

P=25 W

6 0
3 years ago
If you dropped a ball off a building, how far would it fall in 3 seconds?
tangare [24]
If you drop a ball off a building it increases its speed by 10 m/s so in 3 seconds it’s speed would be 30 m/s and it’s distance would be 45m
4 0
4 years ago
An airplane is flying at 300 mi/h at 4000 m standard altitude. As is typical, the air velocity relative to the upper surface of
posledela

Answer:

57330.17766 Pa

Explanation:

P_1 = Pressure at 4000 m = 61660 Pa

\rho = Density at 4000 m = 0.8194 kg/m³

(Values taken from table of properties of air)

V_1 = Velocity of jet = 300\times \frac{1609.34}{3600}=134.11\ m/s

V_2 = Velocity at max thickness

V_2=1.26V_1=1.26\times 134.11=168.9786\ m/s

From Bernoulli's equation

P_1+\frac{1}{2}\rho V_1^2=P_2+\frac{1}{2}\rho V_2^2\\\Rightarrow P_2=P_1+\frac{1}{2}\rho V_1^2-\frac{1}{2}\rho V_2^2\\\Rightarrow P_2=61660+\frac{1}{2}\times 0.8194\times 134.11^2-\frac{1}{2}\times 0.8194\times 168.9786^2\\\Rightarrow P_2=57330.17766\ Pa

The absolute pressure at this point on the wing is 57330.17766 Pa

3 0
4 years ago
(ik it says physics but astronomy is a field of physics sooo) A recently discovered planet in a different solar system is locate
marusya05 [52]

The distance, to the nearest tenth, is 314.9 light-years.

<em>The given data is:</em>

A recently discovered planet is located 1.85*10^5 miles from Earth.

Now we want to transform this distance to light-years.

Remember that a light-year is defined as "the distance that the light would travel in one year".

using the relation:

distance = speed*time

The speed of light is:

speed = 6.706*10^8 mi/h

And in one year has 8760 hours, then we have:

time = 8760 h

replacing these in the equation we get:

distance = speed*time

distance = (6.706*10^8 mi/h)*(8760 h)  = 5,874,456,000,000 miles

Son one light-year is equivalent to 5,874,456,000,000 miles

1 light-year = 5,874,456,000,000 miles

So to transform a distance in miles to light-years, we just need to divide that distance by 5,874,456,000,000 miles:

The distance between the new planet and Earth was:

D = 1.85*10^15 mi = ( 1.85*10^15)/(5,874,456,000,000) = 314.9 light-years.

if you want to learn more about this, you can read:

brainly.com/question/1302132

3 0
3 years ago
If an object is pushed with 10 newtons to the right but friction slows down the object with 5 newtons to the left and a person p
Natasha_Volkova [10]
Yes they are balanced because if it has 10 Newtons to the right and then someone pushes 5 Newtons to the left and then another 5 then that means there is 10 Newtons left and 10 Newtons right
4 0
3 years ago
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