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grin007 [14]
2 years ago
10

At the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. which ball h

its the ground first?
Physics
2 answers:
sergejj [24]2 years ago
8 0
The one that was dropped
UNO [17]2 years ago
4 0

Answer:

Both will hit the ground simultaneously because the vertical component of the  motion of the ball that was thrown horizontally is completely independent  of the horizontal component of its motion. So with respect to vertical motion, both balls are seen to be dropped and falling vertically together.

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The speed of sound in air changes with the temperature. When the temperature T is 32 degrees Fahrenheit, the speed S of sound is
dezoksy [38]

Answer and Explanation:

A. We have temperature t = 32

Speed of sound, s = 1087.5

As t increases by 1⁰f speed increases by 1.2

So that

S = 1088.6

T= 33⁰f

We have 2 equations

1087.5 = k(32) + c

1088.6 = k(33) + c

Subtracting both equations

(33-32)k = 1088.6-1087.5

K = 1.1

b.). S = kT + c

1087.5 = 32(1.1) + c

Such that

C = 1052.3

Therefore

S = 1.1(t) + 1052.3

C.). S = 1.1t + 1052.3

We make t subject of the formula

T = s/1.1 - 1052.3/1.1

T = 0.90(s) - 956.3

D. This means that We have temperature to rise by 0.90 whenever speed is increased

8 0
2 years ago
What is the initial velocity of the object represented by the graph? ___m/s Graph:
Alex17521 [72]

Answer:

On a velocity-time graph… slope is acceleration. the "y" intercept is the initial velocity. when two curves coincide, the two objects have the same velocity at that time.

4 0
2 years ago
Read 2 more answers
At room temperature, a typical person loses energy to the surroundings at the rate of 62 W. If this energy loss has to be made u
Alex_Xolod [135]

To solve this problem it is necessary to use the given proportions of power and energy, as well as the energy conversion factor in Jules to Calories.

The power is defined as the amount of energy lost per second and whose unit is Watt. Therefore the energy loss rate given in seconds was

P = \frac{E}{t} \rightarrow E= Energy, t = time

P = 62W = 62 \frac{J}{s}

The rate of energy loss per day would then be,

P = 62\frac{J}{s} (\frac{86400s}{1day})

P = 5356800 \frac{J}{day}

That is to say that Energy in Jules per lost day is 5356800J

By definition we know that 1KCal = 4.184*10^{6}J

In this way the energy in Cal is,

E = 5356800J \frac{1KCal}{4.184*10^{6}J}

E = 1279.694 KCal

The number of kilocalories (food calories) must be 1279.694 KCal

4 0
2 years ago
Two tiny, spherical water drops, with identical charges of -6.19 × 10-16 C, have a center-to-center separation of 1.22 cm. (a) W
Lynna [10]

Answer:

a

  F  =  2.32*10^{-17} \  N

b

n  =3869 \  electrons

Explanation:

From the question we are told that

   The  charge on each water drop is  q_1=q_2=q =  - 6.19*10^{-16} \ C

   The  distance of separation is  d =  1.22\ cm  = 0.0122 \ m  

   

Generally the electrostatic force between the water drops is mathematically represented as

      F  =  \frac{k *  q_1  *  q_2 }{ d^ 2}

Here  k is the coulombs constant with value  k  =  9*10^9 \ kg\cdot m^3\cdot s^{-4} \cdot A^{-2}.

So  

      F  =  \frac{9*10^9  * -6.19 *10^{-16} *  (-6.19*10^{-16}) }{ 0.0122^ 2}

       F  =  2.32*10^{-17} \  N

Generally the quantity of charge is mathematically represented as

        q =  n * e

Here n is the number of electron present

and  e is the charge on one electron with value  e =  1.60*10^{-19} \  C

    So

         n  = \frac{6.19 *10^{-16}}{1.60*10^{-19}}

         n  =3869 \  electrons

   

4 0
2 years ago
Suggest reasons why poaching for subsistence is likely to be less damaging to the biodiversity of an area than poaching for prof
dlinn [17]
An example for ruining a biodiversity is fishing. The two factors that have contributed to increased fishing in deep ocean waters in recent years are the human population growth and decreased fishing opportunities inshore. Increase population growth increases the demand for food which also leads to increase in fish demand. Because the fish demand is high, inshore fishing opportunities decrease that is why deep ocean waters is the new venue for fishing. This may sound absurd but poaching for subsistence is likely to be less damaging to he biodiversity <span>of an area than poaching for profit. Because the people do not care anymore to the biodiversity that they interrupted just to get back more profit. They do not care what must be taken from it like getting bigger fishes and leaving the smaller ones behind to maintain productivity.</span>

5 0
2 years ago
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