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4 years ago

Selection of raffle tickets from a large bowl is an example of

Physics

2 answers:

My name is Ann [436]4 years ago

6 0

Selection of raffle tickets from a large bowl is an example of sampling without replacement.

- Hope this helps you!!!

deff fn [24]4 years ago

4 0

subjective probability

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Which option is an example of a physical property?

Lera25 [3.4K]

Answer:

it may be that last one

Explanation:

lol i may be incorrect:)

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3 years ago

What is the density of a piece of metal with a mass of 48g and a volume of 6 cm3

Sonja [21]

Answer:

A mineral has a volume of 6 mL and a mass of 12g.

Explanation:

Was this right?

6 0

3 years ago

A 3.0-kg block is on a horizontal surface. The block is at rest when, at t = 0, a force (magnitude P = 12 N) acting parallel to

GarryVolchara [31]

Explanation:

It is given that,

Mass of the block, m = 3 kg

Initially, the block is at rest, u = 0

Force acting on the block, P = 12 N

The coefficient of kinetic friction between the block and the surface is, $\mu_k=0.2$

We need to find the rate is the force P doing work on the block at t = 2.0 s. The rate at which work is done is called the power. Let is equal to P'

Frictional force acting on the block, $f=\mu_k mg$

$f=0.2\times 3\ kg\times 9.8\ m/s^2=5.88\ N$

So, the net force acting on the block, F = P - f

$F=12-5.88=6.12\ N$

Let a is the acceleration of the block, $a=\dfrac{F}{m}$

$a=\dfrac{6.12}{3}=2.04\ m/s^2$

Let v is the velocity of the block after 2 seconds. So,

$v=u+at$

$v=0+2.04\times 2$

v = 4.08 m/s

Power, $P'=\dfrac{W}{t}=\dfrac{F.d}{t}=F.v$

$P'=12\ N\times 4.08\ m/s=48.96\ Watts$

So, the force P is doing work on the block at the rate of 48.96 watts.

3 0

3 years ago

If a circuit contains a 12v battery and two 3 bulbs in series

Paha777 [63]

If the resistance of each bulb is 3 ohms, and they are connected across the battery, then current will flow through them.

In series, the two 3-ohm bulbs will look like a single 6-ohm resistance.

Current = (voltage) / (resistance) = (12v) / (6 ohms) = 2 Amperes.

The battery will need to deliver some power to the circuit.

Power = (voltage) x (current) = (12v) x (2 Amperes) = 24 watts .

Each bulb will dissipate 12 watts, in the form of light and heat.

Do you have a question to ask ?

6 0

4 years ago

An object moves 2.5 m. This is an example of a _______. Question 3 options: direction distance velocity speed

Hitman42 [59]

Distance, since distance represents how far something has travelled, which would be in our case 2.5m.

5 0

3 years ago

Read 2 more answers