Ask question

Ask question

All categories

4 years ago

10

You instead want to make sure the battery for your string of lights will last as long as possible. A battery will last longer if

it powers a circuit with low current. How could you hook up a battery and 2 light bulbs so the least amount of current flows through the battery

1 answer:

salantis [7]4 years ago

8 0

Answer:

I would say the first one

Explanation:

because it makes the most logical sense

You might be interested in

Show your work and resoning for the below requirement.

Leno4ka [110]

Answer:

This value is less than the maximum tension of 500 lbs, making it safe for man to go to the tip flap

Explanation:

We must work on this problem using the rotational equilibrium equations and then they compared the tension values that the cable supports.

Let's start with fixing a reference system on the hinge of the flag, we take as positive the anti-clockwise turn

They indicate the weight of the pole W₁ = 120 lb and a length of L = 9 ft, the weight of the man W₂ = 150, we assume that the cable is at the tip of the pole

- $T_{y}$ L + W₂ L + W₁ L / 2 = 0

T_{y} = W₂ + W₁ / 2

T_{y} = 120 + 150/2

T_{y} = 195 lb

we use trigonometry to find the cable tension

sin 30 = T_{y} / T

T = T_{y} / sin 30

T = 195 / sin 30

T = 390 lb

This value is less than the maximum tension of 500 lbs, making it safe for man to go to the tip flap

T < 500 lb

4 0

4 years ago

You drop an egg from rest with no air resistance. Which of the following statements is correct? Group of answer choices As it fa

enyata [817]

Answer:

As it falls, its mechanical energy is conserved, but its momentum is not conserved.

Explanation:

The mechanical energy of the egg during the fall is the sum of its potential energy and its kinetic energy:

E = U + K

As we know, mechanical energy is always conserved when there are only conservative forces acting on a system. In this case, the only force acting on the egg is the force of gravity, which is a conservative force (we are neglecting air resistance), therefore mechanical energy is conserved.

In particular, as the egg falls down, its gravitational potential energy U decreases, while its kinetic energy K increases (since its speed increases), but the sum of the two quantities, E, remains constant.

On the contrary, momentum is not conserved. In fact, momentum is given by

p = mv

where m is the mass and v is the velocity. Since the velocity of the egg increases (in magnitude) while it falls down, it means that momentum is not constant, so it is not conserved.

Why? The reason is the following: momentum is only conserved when the net external force acting on the system is zero. This is not the case: in fact, there is a net external force acting on the egg (the force of gravity), so the momentum cannot be conserved.

3 0

4 years ago

What type of image is formed by a lens if m = -1.6?

anastassius [24]

The image formed from the lens is real, inverted and enlarged

Explanation:

The magnification of a lens is given by:

$m=\frac{y'}{y}=-\frac{q}{p}$ (1)

where:

y' is the size of the image

y is the size of the object

q is the distance of the image from the lens

p is the distance of the object from the lens

For this lens, the magnification is

m = -1.6

We notice the following:

- The magnification is negative

- The magnification is larger than 1

Looking at eq.(1), we can therefore make the following conclusions:

- SInce $m=\frac{y'}{y}$ and $|m|>1$ , it follows that $|y'|>|y|$ , so the image is larger than the object

- Since $m=\frac{y'}{y}$ and $m$ , it follows that $y'$ (since y > 0 for convention): this means that the image is inverted

- Since $m=-\frac{q}{p}$ and $m$ , it follows that $q>0$ (since p > 0 for convention): this means that the image is real

Learn more about lenses and mirrors here:

brainly.com/question/8737441

#LearnwithBrainly

5 0

3 years ago

Read 2 more answers

A power source of 2.0 V is attached to the ends of a capacitor. The capacitance is 4.0 μF. What is the amount of charge stored i

ioda

$C = 4 \ \mu F = 4 \cdot 10^{-6} \ F. \newline
q = Cu = 4 \cdot 10^{-6} \cdot 2 = 8 \cdot 10^{-6} = 0.000008 \ C.$

8 0

4 years ago

6. Rebecca is playing softball and slides into home plate. Her weight is 600N. The Coefficient of static friction between her cl

son4ous [18]

Answer:

if you are asking for static friction the answer is <u>372N</u>

Explanation

friction static=normal force x coefficient of static friction

and normal force is equal to weight of a body

so static friction = 600N x 0.62= 372N

5 0

3 years ago

Read 2 more answers