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Vitek1552 [10]
3 years ago
12

It took 1.5 hours for a bus to go from one city to the next. The bus traveled at an average velocity of 52mph, west. How far apa

rt were the two cities?
A) 78 mi
B) 35 mi
C) 0.029 mi
D) 0.013 mi
Physics
2 answers:
Elina [12.6K]3 years ago
8 0

Answer: <u><em>78 miles apart     if i can get brainliest that would be great </em></u>

Speed is given by dividing distance by time.

That is; speed = distance/time

In this case; speed = 52 mph and the time is 1.5 hours

Distance= speed × time

Thus;  Distance = 52 × 1.5

                         = 78 miles

Thus the cities are 78 miles apart

arsen [322]3 years ago
8 0
THE ANSWER IS A AND I JNOW BECAUSE I TOOK THE TEST, so you welcome
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The smallness of the critical angle θc for diamond means that light is easily "trapped" within a diamond and eventually emerges
hoa [83]

Answer:

26.6°

Explanation:

refractive index of diamond, n = 2.23

When a ray of light passes from denser medium to the rarer medium and refracts at an angle of 90 degree from the normal of the surface, such angle of incidence in the denser medium is called the critical angle.

By the Snell's law

\frac{Sini}{Sin r }= n

For critical angle, angle of incidence is critical angle, i = θc and angle of refraction, r = 90

So,

Sin θc / Sin 90 = 1 / 2.23

Sin θc = 0.448

θc = 26.6°

Thus, the critical angle is 26.6°.

3 0
3 years ago
A baseball (m=140g) traveling 32m/s moves a fielders
posledela

Answer:

Average force, F = 286.72 N

Explanation:

Given that,

Mass of the baseball, m = 140 g = 0.14 kg

Speed of the ball, v = 32 m/s

Distance, h = 25 cm = 0.25 m

We need to find the average  force exerted by the ball on the glove. It is solved using the conservation of energy as :

\dfrac{1}{2}mv^2=mgh

F = mg

\dfrac{1}{2}mv^2=Fh

F=\dfrac{mv^2}{2h}

F=\dfrac{0.14\times (32)^2}{2\times 0.25}

F = 286.72 N

So, the average force exerted by the ball on the glove is 286.72 N. Hence, this is the required solution.

7 0
3 years ago
Question one please! This is 8th grade science btw.
yKpoI14uk [10]

Good Luck, NYAYAYAYAYa

8 0
3 years ago
Anna and Jon sit on a seesaw. Anna has a mass of 60 kg and sits 2 m from the center. Jon has a mass of 70 kg. How far from the c
Ronch [10]

Answer:

dJ = 1.7 m

Explanation:

The Equation of the Balancing the moments in the center of the seesaw  is like this:

∑Mo = 0

Mo = F*d

Where:

∑Mo : Algebraic sum of moments in the center(o) of the balance

Mo : moment in the o point ( N*m)

F  : Force ( N)

d  : distancia of the force to the the o point  ( N*m)

Data

mA = 60 kg : mass of the Anna

mJ = 70 kg :  mass of theJon

dA = 2 m : Distance from Anna to the center of the seesaw

g: acceleration due to gravity

Calculation of the distance from Jon to the center of the seesaw  (dJ)

∑Mo = 0   WA : Ana's weight   , WJ : Jon's weight

W = m*g

(WA)(dA) - (WJ) (dJ) = 0

(mA*g)(dA) - (mJ*g)(dJ) = 0

We divide by g the equation:

(mA)(dA) - (mJ)(dJ)= 0

(mA)(dA) = (mJ)(dJ)

d_{J} = \frac{m_{A} *d_{A}}{m_{J}}

d_{J} = \frac{60 kg *2 m}{70 kg}

dJ = 1.7 m

5 0
3 years ago
Because light travels in a straight line and casts a shadow, Isaac Newton hypothesized that light is
KonstantinChe [14]

A stream of particles

3 0
3 years ago
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