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3 years ago

Which years had the least sunspot activity?

Physics

1 answer:

Nostrana [21]3 years ago

3 0

The period between about 1650 and 1700 is when astronomers saw virtually no sunspot activity.

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What controls the traits an organism has?

Charra [1.4K]

The Traits an organism displays are ultimately determined by the genes it inherited from its parents, in other words by its genotype. Variant copies of a gene are called alleles, and an individuals genotype is the sum of all the alleles inherited from the parents.

7 0

2 years ago

A spherical capacitor is formed from two concentric sphericalconducting shells separated by vacuum. The inner sphere has radius1

zubka84 [21]

Explanation:

(1). Formula to calculate the potential difference is as follows.

$\Delta V = -\int E dr$

= $-\int \frac{kq}{r^{2}} dr$

= $\frac{kq}{r_{f}} - \frac{kq}{r_{i}}$

= $\frac{kq(r_{f} - r_{i})}{r_{f}r_{i}}$

= $\frac{9 \times 10^{9} \times 3.30 \times 10^{-9}(0.1 - 0.015)}{0.1 \times 0.015}$

= 38.7 volts

Therefore, magnitude of the potential difference between the two spheres is 38.7 volts.

(2). Now, formula to calculate the energy stored in the capacitor is as follows.

E = $\frac{1}{2}QV$

= $\frac{1}{2} \times 3.30 \times 10^{-9} \times 3.87 V$

= $6.39 \times 10^{-8} J$

Thus, the electric-field energy stored in the capacitor is $6.39 \times 10^{-8} J$ .

7 0

2 years ago

Read 2 more answers

A node is a point on a standing wave that has no displacement from the rest position. At the nodes, _____.

Kitty [74]

Answer: (B) There is complete destructive interference between the incoming and reflected waves

Explanation:

For example, if you pluck a guitar the waves will travel back and forth. They consist of nodes and anti-nodes. It is created, when the wave traveling to one side and bounces of the other end and comes back. As it travels to the other side, it is reflected thus, comes back. So standing waves occurs when there is interference.

When the wave is produced, the points where the string is not moving are called nodes and where they are moving are called anti-nodes. The positions where nodes are produced, destructive interference occurs and where anti-nodes are produced, constructive interference occurs

8 0

2 years ago

Read 2 more answers

Tell the order of vessels a blood Cell travels through starting from the heart.

Natalka [10]

Arterie
cwamus
capillaries
phloprant
veins
piscas

7 0

3 years ago

A resistor R and another resistor 2R are connected in a series across a battery. If heat is produced at a rate of 10W in R, then

alekssr [168]

Answer:

Option B

Solution:

As per the question:

Heat produced at the rate of 10 W

The resistor R and 2R are in series.

Also, in series, same current, I' passes through each element in the circuit.

Therefore, current is constant in series.

Also,

Power, $P' = I'^{2}R$

When current, I' is constant, then

P' ∝ R

Thus

$\frac{P'}{2R} = \frac{10}{R}$

P' = 20 W

5 0

3 years ago