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Rus_ich [418]
3 years ago
6

I have a massive rock weighing 3,000 Newtons but I can only accelerate it to 500 m/s2 what is its mass?

Physics
1 answer:
jeka57 [31]3 years ago
6 0

Answer:

6 kg

Explanation:

F=ma

F is Force(newtons)

m is mass(kg)

a is acceleration(m/s^2)

Plug in the numbers

3000 = m(500)

divide both sides by 500 to cancel out the 500.

3000/500=6

6 = m

6kg is the mass

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A certain radio wave has a frequency of 2.0 x 10^6 Hz. What is its wavelength?
evablogger [386]

<span>1.    </span>Electromagnetic radiation are represented in waves. Each type of wave has a certain shape and length. The distance between two peaks in a wave is called the wavelength. This value is equal to the speed of light divided by the frequency.

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Wavelength = c/f
Wavelength = 3x10^8 / </span><span>2.0 x 10^6</span>

Wavelength = 150 m

5 0
4 years ago
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Setler79 [48]
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3 years ago
A 1 000-V battery, a 3 000-Ω resistor, and a 0.50-μF capacitor are connected in series with a switch. The time constant for such
vampirchik [111]

Answer:

The current in the circuit at a time interval of τ seconds after the switch has been closed is 0.123 A

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The time constant for an R and C in series circuit is given by τ = RC.

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τ = 3000 × 5 × 10⁻⁷ = 0.015 s

The voltage across a capacitor as it charges is given be

V(t) = Vs (1 - e⁻ᵏᵗ)

where k = 1/τ

At the point when t = τ, the expassion becomes

V(t = τ) = 1000 (1 - e⁻¹) = 0.632 × 1000 = 632 V

Current flows as a result of potential difference,.

Current in the circuit at this time t =  τ is given by

I = (Vs - Vc)/R

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Vc = Voltage across the capacitor = 632 V

R = 3000 ohms

I = (1000 - 632)/3000 = 0.123 A

6 0
4 years ago
Please answer correctly<br>will give the brainliest<br>Urgent​
EastWind [94]

Answer:

f (frequency) = V / y   where V is the speed of sound and y the wavelength

f = 1500 m/s / 1.5 m = 1000 / sec

T (period) = 1 / f = .001 sec

Suppose you replace the horn by a drum then the period would be the time between the beats of the drum - now if the source is moving towards the observer then the distance between crests  of the wave produced by the drum will be shortened by V * T because of the motion of the drum "towards" the observer, and since the wavelength is shorter the frequency heard by the observer will be higher, and the higher the speed of of the car the shorter the wavelength as seen by the observer and the higher the frequency.

Also, if the car is moving away from the observer then the distance between the crests of the wave emitted will be further apart, and the observer will hear a lower frequency.

3 0
3 years ago
Hot air balloon with a kinetic energy of 76550J and a mass of 1890kg.<br> what’s the velocity?
lukranit [14]

Answer:

K.E =  \frac{1}{2} m {v}^{2}  \\ 76550 = \frac{1}{2} (1890) {v}^{2} \\  {v}^{2}  =  \frac{76550}{945}  \\  = 81.005 \\ v =  \sqrt{81.005}  \\ v  \approx \: 9m. {sec}^{ - 1}

6 0
3 years ago
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