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2 years ago

A softball is thrown straight up. To what height will it go if it takes 2.0 sec to reach the highest point?

Physics

1 answer:

Genrish500 [490]2 years ago

6 0

Answer:

4.4 m

Explanation:

Given:

v = 0 m/s

a = -9.8 m/s²

t = 2.0 s

Find: Δy

Δy = vt − ½ at²

Δy = 0 − ½ (-9.8) (2.0)²

Δy = 4.4 m

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What is the net work on the block?

Strike441 [17]

Answer:

A block device is a computer data storage device that supports reading and (optionally) writing data in fixed-size blocks, sectors, or clusters. These blocks are generally 512 bytes or a multiple thereof in size

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2 years ago

You have two square metal plates with side lengths of (6.50 C) cm. You want to make a parallel-plate capacitor that will hold a

gtnhenbr [62]

Answer:

The necessary separation between the two parallel plates is 0.104 mm

Explanation:

Given;

length of each side of the square plate, L = 6.5 cm = 0.065 m

charge on each plate, Q = 12.5 nC

potential difference across the plates, V = 34.8 V

Potential difference across parallel plates is given as;

$V = \frac{Qd}{L^2 \epsilon_o} \\\\d = \frac{V L^2 \epsilon_o}{Q}$

Where;

d is the separation or distance between the two parallel plates;

$d = \frac{VL^2 \epsilon_o}{Q} \\\\d = \frac{34.8*(0.065)^2 *8.854*10^{-12}}{12.5*10^{-9}} \\\\d = 0.000104 \ m\\\\d = 0.104 \ mm$

Therefore, the necessary separation between the two parallel plates is 0.104 mm

6 0

3 years ago

A bolt falls off an airplane high above the ground. How far does the bolt have to fall before its speed reaches 100m/s (about 20

omeli [17]

We can use the equation vf (the final velocity) =vi (the initial velocity) +at (aceleration times time)

We know the final velocity 100m/s, the initial velocity 0, and the acceleration (gravity) 9.8m/s^2. So, 100=0+9.8t. t=100/9.8

3 0

2 years ago

There is less oxygen in air at higher altitudes than at sea level. Scientists have shown that people living at sea level have 5

Ivanshal [37]

Answer with Explanation:

"Red Blood Cells" (RBCs) contain Hemoglobin that is responsible for carrying oxygen into the body. When people are exposed to higher altitudes, the number RBCs in the body increases. This is because the body has a hard time taking in oxygen due to low atmospheric pressure. It makes it hard for oxygen to pass through the lung membranes. This is called "hypoxia." Such condition deprives the body from oxygen, thus, it creates more red blood cells in order to compensate the condition.

When it comes to people living at sea level, the oxygen can easily pass through the lung membranes due to higher atmospheric pressure. This doesn't require the body to build new RBCs. Therefore, the numbers of RBCs needed by people to thrive is lower than living at higher altitudes.

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3 years ago

How much voltage is required to run 0.025 A of current through a 36 Ω resistor?

aalyn [17]

Yes D is definitely the answer

V=I×R

V=0.025×36

V=0.9 same as 0.90

7 0

3 years ago