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ExtremeBDS [4]
3 years ago
14

Neglecting air resistance, when does a struck baseball accelerate downward at a rate of 9.8 m/s2?

Physics
2 answers:
olga2289 [7]3 years ago
3 0
A baseball is accelerated downward at 9.8 m/s^2 when the only vertical force acting upon the baseball is gravity.
creativ13 [48]3 years ago
3 0

Answer:

Only at the precise moment when it has reached maximum height.

Explanation:

It's the precise moment when it accelerates downward.

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The kitchen in your house measures 10 ft by 10 ft. You need to have 50 footcandles of illumination in the room. How many 60 watt
tekilochka [14]

Answer:

<u>6 bulbs</u> are needed to illuminate the room.

Explanation:

Given:

Measurement of kitchen (A) = 10 ft by 10 ft = 100 sq. ft

Number of footcandles (n) = 50

Lumens emitted by 1 bulb = 834

Number of bulbs (N) = ?

We are also given,

1 foot candle = 1 lumen/sq. ft

So, 50 foot candles = 50 lumens/sq. ft

Now, for an area of 1 sq. ft 50 lumens are emitted.

So, for an area of 100 sq. ft, lumens emitted = 50 × 100 = 5000 lumens

Now, one bulb emits = 834 lumes

Therefore, number of bulbs required for emitting 5000 lumens is given as:

N=\frac{Number\ of\ lumens}{Number\ of\ lumens\ by\ 1\ bulb}\\\\N=\frac{5000}{834}=5.995\approx6

So, 6 bulbs are needed to illuminate the room.

7 0
3 years ago
the light from andromeda galaxy takes about 2.6 million years to reach earth. which of these statements is correct about the and
-Dominant- [34]
A. it is <span>located at a distance of 2.6 million light years from earth</span>
7 0
3 years ago
Four resistors (67 ohm, 83 ohm, 433 ohm, and 309 ohm in that order) are connected in series to a 7.92 V battery of negligible in
Whitepunk [10]

Answer:

.737 v

Explanation:

Since they are in series....they all have the same current running through them.....find the total resistance to calculate the current:

R = 67 + 83 + 433 + 309 = 892 ohm

V/R = current = 7.92 / 892 = 8.87 mAmps

Now the voltage across ecah resistor is   I R

 for the second one   8.87 ma * 83 ohm = V = .737 V

7 0
2 years ago
The_____ form acidic compounds with hydrogen.
dsp73
Chlorine forms hydrochloric acid when reacted with hydrogen
7 0
3 years ago
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You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 35 m/s. The ball has __________________
Elden [556K]

Answer:

The ball has kinetic energy

the kinetic energy is 945 J

Explanation:

4 0
3 years ago
Read 2 more answers
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