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3 years ago

A object travels at constant negative acceleration. What does the graph of the object's velocity as a fun

1 answer:

7 0

Constant = straight line
“Travels at constant negative acc.”
Which is negative slope

Solution: B. Straight line w/ neg. slope

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A certain nuclear power plant is capable of producing 1.2×10^9 W of electric power. During operation of the reactor, mass is con

alukav5142 [94]

Answer:

0.00016 kg

Explanation:

Given:

Power = P = 1.2 × 10⁹ Watts

Power = work done / Time

efficiency = 0.30

Input power = 1.2 × 10⁹ / 0.30 = 4 × 10⁹ W

Energy = 4 × 10⁹ x 60 x 60 = 1.44 x 10¹³ joules

E = m c² , where c is the speed of light and m is the mass.

⇒ mass = m = E / c² = (1.44 x 10¹³) / (3 × 10⁸ )²

= 0.00016 kg

6 0

4 years ago

5. If the line on a speed-time graph is not horizontal, what does that tell you about its

erik [133]

Answer:

The object is not at a constant speed. It is either gaining speed or losing speed.

Explanation:

A speed-time graph measures how fast you are going in a certain amount of time.

4 0

3 years ago

While practicing the trumpet you notice that every time you play a particular note a window in the room rattles. How can you exp

kherson [118]

The sound waves travel because of the pitch of the note so the window rattles.

7 0

3 years ago

One kilowatt-hour (kWh) is the amount of work or energy generated when one kilowatt of power is supplied for a time of one hour.

Helga [31]

Answer:

The energy in one kilowatt-hour is $36\times10^{5}\ J$

Explanation:

Given that,

Power = 1 kW

Time = 1 hour

One kilowatt-hour (kWh) is the amount of work or energy generated when one kilowatt of power is supplied for a time of one hour

We need to calculate the energy

Using formula of energy

$E=p\times t$

Where, P = power

t = time

Put the value into the formula

$E=1\times10^{3}\times3600$

$E=36\times10^{5}\ J$

Hence, The energy in one kilowatt-hour is $36\times10^{5}\ J$

6 0

4 years ago

Si se aplic una fuerza de 150N en un área de de 0.4m2¿cual será la preciosa ejercida?

natali 33 [55]

Answer:

P = 375 Pa

Explanation:

The question says that,"If a force of 150N was applied in an area of 0.4m², what will be the precious exerted?"

We have,

Force, F = 150 N

Area, A = 0.4m²

We need to find the pressure exerted. We know that,

Pressure = forece/area

So,

$P=\dfrac{150\ N}{0.4\ m^2}\\\\P=375\ Pa$

So, the required pressure is equal to 375 pa.

7 0

3 years ago