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3 years ago

13

What characteristic of water makes it the universal solvent?

1 answer:

AveGali [126]3 years ago

8 0

I can break everything thing down

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Which term describes the light-sensitive structures found on the retina?

miss Akunina [59]

The answer would be
C. Rods and Cones

6 0

3 years ago

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What is the density of an object with a volume of 20 cm3 and a mass of 40g?

melisa1 [442]

Density = mass/volume
Density = 40g/20cm^3
Density = 2g/cm^3

3 0

3 years ago

Running is probably the simplest individual sport for promoting both health-related and skill-related fitness.

Tamiku [17]

Answer:

Running is probably the simplest individual sport for promoting both health-related and skill-related fitness. Fencing is often referred to as "mental chess" because it requires dexterity, endurance, and discipline. Individual sports require the coach to make all of the decisions for the athlete.

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2 years ago

A bullet with a mass ????b=13.5 g is fired into a block of wood at velocity ????b=249. The block is attached to a spring that ha

larisa86 [58]

Answer:

$M = 0.436 kg$

Explanation:

As per energy conservation we can say that energy stored in the spring at the position of maximum compression must be equal to the kinetic energy of bullet and block system

so here we have

$\frac{1}{2}(m + M)v^2 = \frac{1}{2} kx^2$

here we know that

k = 205 N/m

x = 35 cm

$\frac{1}{2}(m + M)v^2 = \frac{1}{2}(205)(0.35)^2$

now by momentum conservation we know that

$mv_o = (m + M)v$

$v = \frac{m}{m + M} v_o$

now plug in all values in it

$v = \frac{0.0135}{0.0135 + M}(249)$

now from above equation

$\frac{1}{2}(0.0135 + M)( \frac{0.0135}{0.0135 + M}(249))^2 = 12.56$

$\frac{5.65}{0.0135 + M} = 12.56$

by solving above equation we have

$M = 0.436 kg$

3 0

4 years ago

At take off, a plane flies 100 km north before turning to fly 200 km east. How far is its destination from where the plane took

IRINA_888 [86]

<u>Answer</u>

224 Km

4 Km

<u>Explanation</u>

<u>Part 1</u>

The plane flies 100 Km north and then 200 Km east. This makes a 90° turn. To get the distance taken by the plane we get the hypotenuse.

c² = a² + b²

c² = 100² + 200²

= 50,000

c = √50,000

= 223.606 Km

The answer to the nearest whole number is 224 Km

<u>Part 2</u>

If the runner run 15 Km north then 11 Km south, the resultant distance would be,

15 - 11 = 4 Km

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3 years ago

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