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3 years ago

7

A rabbit running away from a wolf jumps into a briar patch leaving the ground at an angle of 36º to the horizontal at a velocity

of 20.9 m/s. How far does the rabbit jump along the horizontal?

1 answer:

eduard3 years ago

4 0

Answer:

42.4 m

Explanation:

Range of a projectile on level ground is:

R = v₀² sin(2θ) / g

R = (20.9 m/s)² sin(2×36º) / 9.8 m/s²

R = 42.4 m

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AysviL [449]

Answer:

1.7 m

Explanation:

s = f λ

340 m/s = (200 Hz) λ

λ = 1.7 m

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Excluding the noble gas group, how does the number of valence electrons in an element influence its chemical stability?

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Explanation:

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3 years ago

Read 2 more answers

How much work is done when a 700 N refrigerator is lifted straight up a distance of 4 meters

KatRina [158]

Answer:

The work done is 2800 Joules

Explanation:

When a force causes a body to move, work is being done on the object

by the force

Work is the measure of energy transfer when a force moves an object

through a distance

→ Work = Force × Distance

→ The SI unit for work is the joule (J)

A refrigerator of 700 N is lifted straight up a distance of 4 meters

We need to find the work done

→ The weight of the refrigerator is 700 N

→ The force = 700 Newtons

→ The refrigerator is lifted straight up 4 m

→ The distance = 4 meters

Substitute these values in the rule below

→ Work = Force × Distance

→ Work = 700 × 4 = 2800 Joules

<em>The work done is 2800 Joules</em>

8 0

3 years ago

Julie drives 100 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 44.0mph and half the

sashaice [31]

Answer:

52.47706 mph

54.5 mph

Explanation:

The average speed is given by

$V_{av}=\dfrac{Distance}{Time}$

$V_{av}=\dfrac{100}{\dfrac{50}{44}+\dfrac{50}{65}}\\\Rightarrow V_{av}=52.47706\ mph$

Julie's average speed on the way to Grandmother's house is 52.47706 mph

$V_{av}=\dfrac{44+65}{2}\\\Rightarrow V_{av}=54.5\ mph$

Average speed on the return trip is 54.5 mph

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4 years ago

a brand of a lightbulb has a power of 55w and an efficiency of 1.6% how much power is wasted as heat by this lightbulb

Maru [420]

98.4% of the power turns into heat.

If the bulb consumes 55 watts,
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(0.984) x (55w) = 54.12 watts

5 0

3 years ago