What is the resultant velocity

Physics

1 answer:

Rudik [331]3 years ago

5 0

Answer:

Resultant velocity is the vector sum of all given individual velocities. Velocity is a vector because it has both speed and direction. There are many ways to calculate vector sums, such as using a vector addition diagram, but using trigonometry to calculate vector components is usually more efficient.

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Which statement below is true?

Veronika [31]

THe answer will be C

because if you put somethin ht next to something cold it will become cooler and if you be two things that are hot next to each other they will remain hot.

3 0

3 years ago

At 19 ºC a volume of air takes us 9.0 mL in an expandable container. What is its volume after it is heated up to 50. ºC?

Katena32 [7]

According to Charles law, we know, at constant pressure, volume is directly proportional to temperature.
So, V/T = constant

V₁/t₁ = V₂/t₂
V₁t₂ = V₂t₁

Here, we have: V₁ = 9 mL
V₂ = ?
T₂ = 50+272 = 323 K
T₁ = 19+273 = 292 K

Substitute their values into the expression:
9 × 323 = V₂ × 292
V₂ = 2907 / 292
V₂ = 9.95
After rounding-off to unit place value, it would be equal to 10 mL

So, In short Option C would be your correct answer.

Hope this helps!

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3 years ago

Clever poster reasoning

nadya68 [22]

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7 0

3 years ago

A 500-kilogram horse runs at 5 meters/second. The horse’s kinetic energy is joules.

kari74 [83]

To solve this, we are going to use the formula for the kinetic energy of an object: $E_{k}= \frac{1}{2} mv^2$
where
$E_{k}$ is the kinetic energy of the object.
$m$ is the mass of the object.
$v$ is the speed of the object.

We know form our problem that the mass of the horse is 500 kilograms, so $m=500$ ; we also know that the speed of the horse is 5 meter/second, so $m=5$ . Lets replace those values in our formula to find $E_{k}$ :
$E_{k}= \frac{1}{2} mv^2$
$E_{k}= \frac{1}{2} (500)(5)^2$
$E_{k}= \frac{1}{2} (500)(25)$
$E_{k}= \frac{12500}{2}$
$E_{k}=6250$ J

We can conclude that the kinetic energy of the horse is 6250 Joules.

7 0

4 years ago

Read 2 more answers

Joseph DeLoach of the United States set an Olympic record in 1988 for the 200-meter dash with a time of 19.75 seconds. What was

Lera25 [3.4K]

Answer:

The average speed was 10.12 m/s or 22.96 mi/h

Explanation:

The average speed is defined as:

$v = \frac{d}{t}$ (1)