All categories

4 years ago

Can anyone help me with B.?

Physics

1 answer:

nata0808 [166]4 years ago

6 0

An organism that can make its own food is a producer. An organism that obtains energy by feeding on the other organisms is a consumer. Decomposers break down wastes and dead organisms and return the raw materials to the ecosystem.

You might be interested in

what system helps the body maintain homeostasis by giving it the nutrients it needs to perform different functions

castortr0y [4]

<span>The Cardiovascular system is the system that helps the body maintain homeostasis by giving it the nutrients it needs to perform different functions</span>

6 0

3 years ago

A bucket of water with total mass 23 kg is attached to a rope, which in turn, is wound around a 0.050-m radius cylinder at the t

aliina [53]

The question seems a bit incomplete. The question should be as follow:

A bucket of water with total mass 23 kg is attached to a rope, which in turn, is wound around a 0.050-m radius cylinder at the top of a well. A crank with a turning radius of 0.25 m is attached to the end of the cylinder. What minimum force directed perpendicular to the crank handle is required to just raise the bucket? (Assume the rope's mass is negligible, that cylinder turns on frictionless bearings, and that g= 9.8 m/s2.)

Answer:

45.08N

Explanation:

The question involves moment topic. Note that the equation of moment, M is

Moment, M = Force, F x Perpendicular distance from the turning point, d

M = F x d

Moment involves turning movement along the pivot. in this case, we have 2 pivots. The first one the attached near the rope, while the other is the crank.

To raise the bucket, minimum force required must be able to provide at least the same moment as the moment due to the bucket of water. i.e.

Moment due to bucket = moment due to force on the crank

First find the moment due to bucket,

Mb = F (weight) x d (radius of cylinder on top of well)

= (23 x 9.8) x 0.05

= 11.27 Nm

Next, Find the moment due to force on the crank. Note that the force is the minimum required force for this equation.

Mc = F (min Force) x d (radius of crank)

= F x 0.25 = 0.25F

Now we get a simple equation of

11.27 = 0.25F

Using Algebra, we'll get the minimum Force, F:

F = 11.27 / 0.25

= 45.08 N

4 0

4 years ago

Read 2 more answers

A certain helium-neon laser pointer, emitting light with a wavelength of 632 nm, has a beam with an intensity of 825 W/m2 and a

BabaBlast [244]

Answer:

$N = 1.62 \times 10^{15}$

Explanation:

Energy of each photon is given as

$E = \frac{hc}{\lambda}$

here we will have

$\lambda = 632 nm$

now we will have

$E = \frac{(6.626\times 10^{-34})(3 \times 10^8)}{632 \times 10^{-9}}$

$E = 3.14 \times 10^{-19} J$

now let say there is N number of photons per second

so power due to photons is

$P = N(3.14 \times 10^{-19})$

now intensity is given as power received per unit area

so we have

$I = \frac{P}{A}$

$825 = \frac{N(3.14 \times 10^{-19})}{\pi (1.40 \times 10^{-3})^2}$

$825 = N(5.11 \times 10^{-14})$

$N = 1.62 \times 10^{15}$

5 0

3 years ago

A long wire carries a current 5 A from west to east. A magnetic compass pointing North is placed underneath the wire at a distan

Gemiola [76]

Answer:

no deflection

Explanation:

current is flowing from west to east. As the magnetic field of a long wire carrying current is circular, its direction will be north below the wire and south above the wire (according to the right hand rule). So, when the compass is placed underneath the wire, it will still point towards the north direction.

6 0

3 years ago

Wispy, feathery clouds made mostly of ice crystals that form at high altitudes, usually above 6 kilometers.

Oliga [24]

Cirrus clouds are the clouds mostly made of ice becasue of the high altitudes

4 0

3 years ago