Answer:
Range formula: R = v^2 sin (2 theta) / g
If theta = 69 deg and v = 15.1
R = 15.1^2 sin 138 / 9,8 = 15.6 m
sin 138 = .669 = sin 42
So a snowball thrown at 21 deg will travel
R = 15.1 * .669^2 / 9.8 = 15.6 m
The second snowball can be thrown at 21 deg to travel the same distance
Vx = V cos theta = 15.1 * cos 69 = 5.41 first snowball
t1 = 15.6 / 5.41 = 2.88 sec
Vx = V cos theta = 15.1 cos 21 = 14.1 m/s
t2 = 15.6 / 14.1 = 1.11 sec
Difference = t1 - t2 = 1.77 sec time delay for second snowball
<h2>Answer:</h2>
At 30 C, exactly 95 grams of this salt dissolved completely in 100 grams of water. According to the solubility chart, the salt is Sodium niatrate NaNo3
Every single metallic nitrate are inorganic salts of a given metal cation and the nitrate anion. The nitrate anion is a univalent (- 1 charge) poly atomic particle made out of a solitary nitrogen iota ionically bound to three oxygen molecules for an all out equation load of 62.05. Nitrate mixes are commonly solvent in water.
Explanation:
Mixtures consist of two or more substances chemically combined. Mixtures cannot be separated by physical means. Mixtures consist of only one kind of atom. ***Mixtures have two or more substances .a 50-mL beaker with the same label.
Answer:
Where the electric potential is constant, the strength of the electric field is zero.
Explanation:
As a test charge moves in a given direction, the rate of change of the electric potential of the charge gives the potential gradient whose negative value is the same as the value of the electric field. In other words, the negative of the slope or gradient of electric potential (V) in a direction, say x, gives the electric field (Eₓ) in that direction. i.e
Eₓ = - dV / dx ----------(i)
From equation (i) above, if electric potential (V) is constant, then the differential (which is the electric field) gives zero.
<em>Therefore, a constant electric potential means that electric field is zero.</em>
Answer:
Symptoms of excessive stress include all of the following EXCEPT: increased energy level.
