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Pie
3 years ago
15

Assuming the ball's initial velocity was 57° above the horizontal and ignoring air resistance, what did the initial speed of the

ball need to be to produce such a home run if the ball was hit at a point 0.9 m (3.0 ft) above ground level?
Assume that the ground was perfectly flat. Express your answer using two significant figures. v₀ = ______ m/s
How far would the ball be above a fence 3.0 m (10 ft) high if the fence was 116 m (380 ft) from home plate? Express your answer using two significant figures. h = _______ m

Physics
1 answer:
UNO [17]3 years ago
7 0

Answer:

V0 = 44.97m/s

Height above fence = 66.67m

Explanation:

The detailed calculation is done as shown in the attachment

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Two children of mass 18 kg and 29 kg sit balanced on a seesaw with the pivot point located at the center of the seesaw. If the c
DedPeter [7]

Answer:

3.085 [m].

Explanation:

1) The rule:

m₁*g*l₁=m₂*g*l₂, where m₁ and l₁ - the mass and distance for the small child, m₂ and l₂ - for the big child;

2) according to the condigion l₁+l₂=5, then

3) it is possible to make up the system:

\left \{ {{l_1+l_2=5} \atop {m_1*l_1=m_2*l_2}} \right. \ = > \ \left \{ {{l_1=5-l_2} \atop {18*(5-l_2)=29*l_2}} \right. \ = > \ \left \{ {{l_1=\frac{145}{47}} \atop {l_2=\frac{90}{47}}} \right.

4) finally, l₁=145/47≈3.085 [m].

7 0
2 years ago
The statement that no two electrons in the same atom can have the same four quantum numbers is a restatement of
andreev551 [17]

Answer:

Pauli exclusion principle

Explanation:

Pauli's exclusion principle speaks to the quantum numbers assigned to an electron to describe it's general position and movement. Two electrons can occupy the same energy level (which is described by the first quantum number-the principal quantum number), the orbital angular momentum quantum number (represented by the second number) and magnetic quantum number. electrons that have the same value for all three numbers will have different spins. one will have positive a half while the other has negative a half. Therefore they will never have the same complement of quantum numbers

6 0
3 years ago
What are the three most influential variables that affect electrical force?
snow_tiger [21]
I know that the answer is 3 because 1+2 is 3
4 0
4 years ago
Question 1 (1 point)
IrinaK [193]
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  3. Fullback  
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<h3><u><em>these are all correct i got an 100%</em></u><em><u> </u></em></h3>
8 0
3 years ago
A large, massive object collides with a stationary, smaller object on an ice rink. If the large object transfers all of its mome
Hunter-Best [27]

Answer:

a ut will move faster than the large object was moving initially

5 0
3 years ago
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