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alexandr402 [8]
3 years ago
15

A home run is hit in such a way that the baseball just clears a wall 21m hgh located 130m from home plate the ball is hit at an

angle of 35 degrees to the horizontal find the inital sped of the ball the time it takes the ball to reach the wall and the velocity compontets and the speed if the ball when it reached the wall assume the that ball is hit at a height of 1m above the ground?
Physics
1 answer:
svlad2 [7]3 years ago
3 0

Answer:

see the attachment

Explanation:

take coordinate system correctly. use formulas of projectile motion

Download pdf
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While riding TRAX at a constant speed of 16 m/s you walk toward the front of the car at 5 m/s.
AVprozaik [17]

Speed of the TRAX is given as 16 m/s so let say it is given as

v_t = 16 m/s

now our speed towards the front end is given by 5 m/s so this is the relative speed of us with respect to TRAX

let say this speed is given as

v_1t = 5 m/s

now we need to find the speed with respect to someone standing outside the TRAX

so here we need to find the net speed in ground frame and hence we can use the formula of relative speed

v_{1t} = v_1 - v_t

v_1 = v_{1t} + v_t

v_1 = 5 + 16

v_1 = 21 m/s

so someone outside the TRAX will see our speed as 21 m/s

4 0
3 years ago
The average distance between collisions for atoms in a real gas is known as the mean free path (see pp. 298-9 in McKay). Which o
dusya [7]

Answer:

300 nm

Explanation:

R = Gas constant = 8.314 J/molK

r = Atomic radii = 1\times 10^{-10}\ m

d = Atomic diameter = 2r=2\times 10^{-10}\ m

At STP

T = Temperature = 273.15 K

P = Pressure = 100 kPa

N_A = Avogadro's number = 6.022\times 10^{23}

The mean free path is given by

\lambda=\frac{RT}{\sqrt2d^2N_AP}\\\Rightarrow \lambda=\frac{8.314\times 273.15}{\sqrt2 \pi \times (2\times 10^{-10})^2\times 6.022\times 10^{23}\times 100000}\\\Rightarrow \lambda=2.12165\times 10^{-7}\ m=212.165\times 10^{-9}\ m=212.165\ nm

The answer that best represents the mean free path for gas molecules is 300 nm

4 0
3 years ago
How does an atom of strontium 88 become a strontium ion with a+2 charge ?
Oksana_A [137]

<u>Answer:</u>

Strontium atom loses 2 electrons to become an ion.

<u>Explanation:</u>

Strontium (an Alkaline Earth metal) is the 38th element found in the Group 2 of the periodic table.

A Strontium atom has same number of electrons as its protons. It has a +2 electronegativity because it belongs to group 2 of the periodic table so it has the tendency to lose 2 electrons to form a positive ion.

Therefor, Strontium atom loses 2 electrons to become an ion with 2 electrons lesser than its atom.

7 0
3 years ago
Read 2 more answers
An object has a displacement of 45
Anika [276]

Answer:

45° to min.

1° ----> 60 min

45° ----> ?.

45 * 60

2700 min

<h3><u>2</u><u>7</u><u>0</u><u>0</u><u> </u><u>min</u></h3>
5 0
2 years ago
Ben climbs a tree to retrieve a lost football. If he does 2,400 J of work to climb 8 m, how much force is he using?
krok68 [10]
Work = Force * distance.
d = 8 m
W = 2400 J
F = ???

2400 = 8 * F
F = 2400/8
F = 300 N


6 0
3 years ago
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