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kobusy [5.1K]
2 years ago
11

Everyone i need help so much

Physics
2 answers:
Veronika [31]2 years ago
3 0

Answer:

b

Explanation:

katrin [286]2 years ago
3 0

Answer:

b I got it right on this quiz I did one time

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Please answer as soon as possible. <br><br> A Physics question about electricity and circuits.
garik1379 [7]

Answer:

Explanation:

Electrical energy is:

E = IVt

E = 210 * 12 * 10\\\\\\E = 25200 J

5 0
3 years ago
A ball is thrown horizontally from the top of a tall cliff. Neglecting air drag, what vertical distance will the ball have falle
adell [148]

The relevant equation to use here is:

y = v0 t + 0.5 g t^2

where y is the vertical distance, v0 is initial velocity = 0, t is time, g = 9.8 m/s^2

 

y = 0 + 0.5 * 9.8 * 3^2

<span>y = 44.1 meters</span>

5 0
3 years ago
Which pair of variables defines motion?
masha68 [24]

Answer: position (x) and time (t)

Explanation:

A body is said to be in motion when its position changes with time with respect to a stationary observer.

Following are the types of motion:

<u>Uniform motion</u>: When equal amount of distance is covered in equal intervals of time.

<u>Non-Uniform motion</u>: When unequal amount of distance is covered in equal intervals of time.

Motion can be of the following types as well:

<u>Rectilinear motion</u>: when object moves in a straight line.

<u>Circular motion</u>: when object moves in a curved path.

<u>Periodic motion</u>: when motion repeats itself in fixed intervals of time.

Thus, in order to define motion, only two variables are required: position and time. Measuring these variables can determine whether the object is in motion or not and the type of motion.

5 0
2 years ago
Read 2 more answers
A bungee jumper jumps from a tall bridge that is 60m above a flat, dry creek bed. She is carrying an audio generator that emits
dolphi86 [110]

Answer:

Explanation:

The original frequency of sound  f₀

The apparent frequency of sound fa

For apparent frequency the formula is

fa =  f_0\times\frac{V+v}{V-v }     , v is velocity of jumper which increases as he goes down .

Beat frequency

= fa - f₀

=  f_0\times(\frac{V+v}{V-v }-1)

=  f_0\times(\frac{2v}{V-v })

since v is very small in comparison to V , velocity of sound , in the denominator , v can be neglected.

beat frequency = f_0\times(\frac{2v}{V })

v , the velocity of jumper will go on increasing as long as net force on the jumper is positive or

mg > kx where x is extension in the cord and k is its force constant . Below this point kx or restoring force becomes more than weight of the jumper and then net force on the jumper directs upwards. At this point beat frequency becomes maximum.

6 0
3 years ago
If a moon on jupiter has 1/8 the mass of the earth and 1/2 the earth's radius, what is the acceleration of gravity on the planet
dusya [7]

The formula we can use here is:

g = G m / r^2

where g is gravity, G is gravitational constant, m is mass, and r is radius

Since G is constant, therefore we can equate two situations:

g1 m1 / r1^2 = g2 m2 / r2^2

(10 m/s^2) r1^2 / m1 = g2 * (1/2 r1)^2 / (1/8 m1)

<span>g2 = 5 m/s^2</span>

8 0
3 years ago
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