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3 years ago

What relationship is flowers and honey bees

1 answer:

7 0

A symbiotic relationship. One where two species benefit each other. In this case, the flower gives the bee nectar, so the bee pollinates the flower.

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a 1010 W radiant heater is constructed to operate at 115 V. (a) What is the current in the heater when the unit is operating?

scZoUnD [109]

Answer:

Explanation:

Given data:

power rating of the heater P= 1010 W

voltage of the heater V= 115 volts

current taken by the heater I= ?

We can apply the power formula to solve for the current in the heater

i.e P= IV

Making I the current subject of formula we have

I= P/V

Substituting our given data into the expression for I we have

I=1010/115= 8.78 A

<h2 /><h2><em>Hence the current when the unit/heater is operating is 8.78 Amp</em></h2>

5 0

3 years ago

A 2.3 kg , 20-cm-diameter turntable rotates at 110 rpm on frictionless bearings. Two 460 g blocks fall from above, hit the turnt

boyakko [2]

Answer:

The correct solution is "64 RPM".

Explanation:

The given values are:

Mass,

M = 2.3 kg

Diameter,

D = 20 cm

i.e.,

= 0.2 m

Rotates at,

N = 110 rpm

Mass of block,

m = 460 g

i.e.,

= 0.46 kg

According to angular momentum's conservation,

⇒ $I_1\omega_1=I_2\omega_2$

then,

⇒ $I_1=\frac{1}{2}MR_2$

On substituting the values, we get

⇒ $=\frac{1}{2}\times 2.3\times (0.1)^2$

⇒ $=\frac{1}{2}\times 0.023$

⇒ $=0.0115 \ kg \ m^2$

Now,

⇒ $I_2=I_1+2mR^2$

$=0.0115+2\times 0.46\times (0.1)^2$

$=0.0115+0.0092$

$=0.02 \ kg \ m^2$

then,

⇒ $0.0115\times 110=0.02\omega_2$

⇒ $1.265=0.02\omega_2$

⇒ $\omega_2=\frac{1.265}{0.02}$

⇒ $=63.25 \ or \ 64 \ RPM$

7 0

3 years ago

If the coolant in an air conditioner has a lower temperature than the air in a building, then ____.

solmaris [256]

Heat always flows from higher temperature to lower temperature. So option A. heat will flow from the air into the coolant is the correct answer.

8 0

4 years ago

Read 2 more answers

In static electricity what are the subatomic particles, their charges, their location in the atom

enot [183]

Electrons - have a negative charge and orbit the nucleus
Protons - have a positive charge and are located in the nucleus
Neutrons - have no charge and are also located in the nucleus

6 0

4 years ago

A rookie quarterback throws a football with an initial upward velocity component of 17.0 m/s and a horizontal velocity component

vitfil [10]

Answer:

(a) 1.73 s

(b) 14.75 m

(d) double

(e) 63.32 m

Explanation:

Vertical component of initial velocity, uy = 17 m/s

Horizontal component of initial velocity, ux = 18.3 m/s

(A) At highest point of trajectory, the vertical component of velocity is zero. Let the time taken is t.

Use first equation of motion in vertical direction

vy = uy - gt

0 = 17 - 9.8 t

t = 1.73 seconds

(B) Let the highest point is at height h.

Use III equation of motion in vertical direction

$v^{2}=u^{2}-2gh$

0 = 17 x 17 - 2 x 9.8 x h

h = 14.75 m

Use second equation of motion i vertical direction.

$h = ut + 0.5at^2$

h = 0 , u = 17 m/s

0 = 17 t - 0.5 x 9.8 t^2

t = 3.46 second

(D) It is the double of time calculated in part A

(E) Horizontal distance = horizontal velocity x total time

d = 18.3 x 3.46 = 63.32 m

8 0

3 years ago