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Shtirlitz [24]
2 years ago
7

If the speed of a particle is doubled, what happens to its kinetic energy?

Physics
1 answer:
Norma-Jean [14]2 years ago
4 0

Answer:

it increases

Explanation:

maybe for example we have 5pets then you multiple them by two u get 10

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A simple pendulum on the surface of Earth is found to undergo 15.0 complete small‑amplitude oscillations in 8.75 s. Find the pen
FinnZ [79.3K]

Answer:

Length of the Pendulum is 14.4 cm

Explanation:

Time period of simple pendulum is given by

T=2\pi \sqrt{\frac{L}{g} } \\

time taken for one oscillation is

T=\frac{time taken}{oscillations} \\T=\frac{8.75}{15} \\T=0.583 s

Pendulum length on the earth surface is

L=\frac{T^2g}{4\pi^2 }\\L=\frac{0.583\times 9.8}{4\pi^2 } \\L=0.144 m

Length of the Pendulum is 14.4 cm

6 0
3 years ago
In a(n) _____ circuit there are two or more loops through which the current flows, and each resistor has its own connection to t
sleet_krkn [62]

Question #1:

That's an description of an <em>parallel</em> circuit. <em>(b)</em>

Question #2:  

Power = (current) x (voltage)

Power = (0.4 A) x (120 v)

Power = <em>48 watts</em>

5 0
3 years ago
Read 2 more answers
Amy needs 5.0 V for some integrated circuit experiments. She uses a 9.0 V battery and two resistors to make a voltage divider. O
just olya [345]

Answer:

The value of smaller resistor is 248 Ω.

Explanation:

Voltage divider circuit is used to convert a higher voltage to a smaller voltage with the help of resistors which are connected in parallel.

As shown in the circuit, Vs is the source voltage, R₁ and R₂ are the two resistors and V₀ is the output voltage.

Applying KVL in the circuit, the output voltage is given by :

V_{0} = \frac{V_{s}R_{2}  }{R_{1} +  R_{2}  }

According to the problem, R₂ = 310Ω , V₀ = 5 V and Vs = 9 V. Substitute these values in the above equation.

5 = \frac{9\times310  }{R_{1} +  310  }

R_{1}+310 = \frac{9\times310}{5}

R_{1} = 558 - 310

R₁ = 248Ω

7 0
3 years ago
You throw a ball into the air. Which two forces cause the ball to gradually stop moving upward and then fall back to Earth?
Virty [35]

Answer:

I'm pretty sure the answer is D

Explanation:

Honestly it's just a guess so let me know if it's right :3

3 0
3 years ago
Read 2 more answers
A 4.0 kg ball is traveling at 3.0 m/s and strikes a wall. The ball bounces off the wall with a velocity of 4.0 m/s in the opposi
trasher [3.6K]

Answer:

280 N

Explanation:

Applying Newton's third second law of motion,

F = m(v-u)/t................... Equation 1

Where F = Magnitude of the average force on the ball during contact, v = final velocity of the ball, u = initial velocity of the ball, t = time of contact of the ball and the wall.

Note: Let the direction of the initial velocity of the ball be positive

Given: m = 4 kg, u = 3.0 m/s, v = -4.0 m/s (bounce off), t = 0.1 s

Substitute into equation 1

F = 4(-4-3)/0.1

F = 4(-7)/0.1

F = -28/0.1

F = -280 N.

Note: The negative sign tells that the force on the ball act in opposite direction to the initial motion of the ball

3 0
3 years ago
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