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3 years ago

What is the greenhouse effect?

2 answers:

8 0

A or the first one, the natural process where the sun 's energy is trapped by the atmosphere to make the earth warm enough for life.

Zanzabum3 years ago

6 0

A on that problem :)[email protected]

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a bowling ball hits two standing bowling pins at the same time. which of the following is true. assume that all collisions are e

neonofarm [45]

Answer:

Explanation:

6 0

3 years ago

A young diver is practicing his skills before an important team competition. Use the diagram below in order to analyze the energ

nika2105 [10]

h=10m-5m=5m
m=90Kg
g=9.8m/s^2

$\\ \sf\longmapsto GPE=mgh$

$\\ \sf\longmapsto GPE=90(5)(9.8)$

$\\ \sf\longmapsto G PE=4410J$

Now

It's converted to kinetic energy while reaching ground.

$\\ \sf\longmapsto K.E=4410$

$\\ \sf\longmapsto \dfrac{1}{2}mv^2=4410$

$\\ \sf\longmapsto 90v^2=8820$

$\\ \sf\longmapsto v^2=98$

$\\ \sf\longmapsto v=9.9m/s$

Done

7 0

2 years ago

Read 2 more answers

According to ohms law, as the voltage increases across a 40 ohm resistor what happens to the current, resistors, and resistance

irakobra [83]

Answer:

As the voltage increases, the current flowing through the circuit increases while the resistance of the resistor remains constant.

Explanation:

Ohm's law states that the current flowing through a circuit is directly proportional to the applied voltage.

V = IR

where;

I is the current

R is the resistance

V is the applied voltage

Based on this law (Ohm's law), as the voltage increases, the current flowing through the circuit increases while the resistance of the resistor remains constant.

7 0

3 years ago

What is the speed of sound in air at 50°F (in ft/s)?

gizmo_the_mogwai [7]

Answer:

Speed of air = 1106.38 ft/s

Explanation:

Speed of sound in air with temperature

$v_{air}=331.3\sqrt{1+\frac{T}{273.15}} \\$

Here speed is in m/s and T is in celcius scale.

T = 50°F

$T=(50-32)\times \frac{5}{9}=10^0C \\$

Substituting

$v_{air}=331.3\sqrt{1+\frac{10}{273.15}}=337.31m/s \\$

Now we need to convert m/s in to ft/s.

1 m = 3.28 ft

Substituting

$v_{air}=337.31\times 3.28=1106.38ft/s \\$

Speed of air = 1106.38 ft/s

6 0

2 years ago

How would you calculate power if work is not done?

Brilliant_brown [7]

Explanation:

This how you do it..

Calculate Watt-hours Per Day. Device Wattage (watts) x Hours Used Per Day = Watt-hours (Wh) per Day. ...

Convert Watt-Hours to Kilowatts. Device Usage (Wh) / 1000 (Wh/kWh) = Device Usage in kWh. ...

Find Your Usage Over a Month.

7 0

3 years ago