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miss Akunina [59]

2 years ago

6

4 (a) (1) Which lens is a converging lens with the greatest power?

1 answer:

SOVA2 [1]2 years ago

3 0

Answer:

Answer

Explanation:

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Longitudinal waves transfer energy ___________ to the direction of the wave motion.

viva [34]

Longitudinal waves transfer energy parallel to the direction of the wave motion

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2 years ago

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Two nuclei join to form a larger nucleus during which process

pentagon [3]

nuclear fusion- produces huge amounts of energy.

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3 years ago

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Eric drops a 2.20 kg water balloon that falls a distance of 45.08 m off the top of a

Marianna [84]

Answer:

972 J

Explanation:

At the bottom, all the gravitational potential energy was converted into kinetic energy. If you calculate the GPE, its value will be the same that the KE at the bottom. The GPE can be calculated this way:

GPE = mass×gravity×heigth

GPE = 2.2×9.8×45.08 ≈ 972

4 0

2 years ago

4. A 1,000 kg truck moving at 10 m/s runs into a concrete wall. It takes 0.5 seconds for the truck to conipietery

Maru [420]

Answer:

$\large \boxed{\text{h. 20 000 N}}$

Explanation:

Force is the change in momentum over time

F = Δp/Δt

1. Calculate the change in momentum

p₁ = mv₁ = 1000 kg × 10 m/s = 10 000 kg·m·s⁻¹

p₂ = 0

Δp = p₂ - p₁= (0 - 10 000) kg·m·s⁻¹ = -10 000 kg·m·s⁻¹

2. Calculate the force

$\begin{array}{rcl}F & = & \dfrac{\Delta p}{\Delta t}\\\\& = & \dfrac{-10 000 \text{ kg$\cdot$m$\cdot$ s}^{-1}}{\text{ 0.5 s}}\\\\& = & \textbf{-20 000 N}\\\end{array}\\\text{The negative sign shows that the force is exerted opposite to the direction of motion.}\\\text{The magnitude of the force is $\large \boxed{\textbf{20 000 N}}$}$

3 0

2 years ago

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In the future, a spaceship has traveled three percent of the distance to a space station. If the ship has traveled 2.9 x 10^7 mi

leva [86]

Answer:

$9.38 * 10^8 miles$

Explanation:

The spaceship has traveled 3% of the distance to a space station and it has traveled $2.9 * 10^7$ miles.

Let the total distance from the ship's starting point to the space station be x.

This means that:

$\frac{3}{100} * x = 2.9 * 10^7\\\\=> x = \frac{2.9 * 10^7 * 100 }{3} \\\\x = 9.67 * 10^8 miles$

The total distance to be traveled is $9.67 * 10^8 miles$ .

Therefore, the distance left to travel is:

$9.67 * 10^8 - 2.9 * 19^7\\\\= 9.38 * 10^8 miles$

6 0

2 years ago