4 years ago

I don't know the answer to 1

Physics

2 answers:

larisa86 [58]4 years ago

7 0

Waves transfer energy but not matter

Reil [10]4 years ago

4 0

Energy but not matter.

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Which type of electromagnetic waves have longer wavelengths that the waves that make up visible light.

Inessa [10]

Answer:

radiation

Explanation:

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4 years ago

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Electricity is the flow of electrons. The questions relate to how electricity is quantified. Electrons are charged particles. Th

xxTIMURxx [149]

The amount of charge that passes per unit time is called <em>electric current</em> .

Current has dimensions of [Charge] / [Time] .

It's measured and described in units of ' Ampere ' .

1 Ampere means 1 Coulomb of charge passing a point every second.

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3 years ago

A garden hose with an internal diameter of 2.9 cm is connected to a (stationary) lawn sprinkler that consists merely of a contai

Alecsey [184]

Answer:

Water leaves the holes with a speed of 2.65 m/sec

Explanation:

It is given internal diameter of garden hose = 2.9 cm

So internal radius $r_1=\frac{2.9}{2}=1.45cm$

Number of holes n = 24

Diameter of holes d = 0.36 cm

So radius of holes $r_2=\frac{0.36}{2}=0.18cm$

Velocity of water in hose $v_1=0.98m/sec$

According to continuity equation

$A_1v_1=nA_2v_2$

$\pi r_1^2\times 0.98=24\times \pi r_2^2\times \times v_2$

$1.45^2\times 0.98=24\times 0.18^2\times \times v_2$

$v_2=2.65m/sec$

Therefore water leaves the holes with a speed of 2.65 m/sec

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4 years ago

An athlete can complete 100m Sprint in 10s. what is the athletes average speed for the sprint?

Lera25 [3.4K]

Answer:

10 Meters per second

Explanation:

speed=distance/time

s=100m/10s

s=10m/s

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3 years ago

. A little car has a maximum acceleration of 2.57 m/s2. What is the new maximum acceleration of the little car if it tows anothe

valkas [14]

Answer:

$a'=1.285\ m/s^2$

Explanation:

Let m be the mass of a little car and m' be the mass of another car.

We know that,

Force = mass × acceleration

ATQ,

m × a = 2m × a'

a = 2 × a'

$a'=\dfrac{a}{2}\\\\a'=\dfrac{2.57}{2}\\\\a'=1.285\ m/s^2$

So, the acceleration of another little car is equal to $1.285\ m/s^2$ .

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3 years ago