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3 years ago

58

Physics

1 answer:

Basile [38]3 years ago

3 0

Answer:

T = 0.01 s

Explanation:

Given that,

The frequency of the beats of a hummingbird, f = 100 Hz

We need to find the period of the hummingbirds flaps. Let the time is t. We know that the relation between frequency and time period is given by :

T = 1/f

Put all the values,

T = 1/100 = 0.01 s

So, the time period of the humming bird is 0.01 s.

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A student drove to the university from her home and noted that the odometer on her car increased by 16.0 km. The trip took 19.0

777dan777 [17]

ANSWER:

a. 50.53 km/h

b. 32.53 km/h (in the direction of 25˚ S of E)

c. 4.27 km/h

d. 0 km/h

STEP-BY-STEP EXPLANATION:

We have that the speed is given by the following formula:

$\begin{gathered} s=\frac{d}{t} \\ \text{ where s is the speed, d is the distance and t is the time} \end{gathered}$

We know that the equivalence between minutes and hours is that 60 minutes equals 1 hour, therefore:

$s=\frac{16\text{ km}}{19\text{ }\min\frac{1\text{ h}}{60\text{ min}}}=50.53\text{ km/h}$

The velocity is given by the following formula

$\begin{gathered} v=\frac{\Delta x}{t} \\ \text{replacing:} \\ v=\frac{10.3\text{ km-}0\text{ km}}{19\text{ }\min \frac{1\text{ h}}{60\text{ min}}}=32.53 \end{gathered}$

The total distance traveled would then be two 16 kilometers, that is 32 km and the time would be 7.5 hours. we replace

$s=\frac{32\text{ km}}{7.5\text{ h}}=4.27\text{ km/h}$

Since it starts in the same place that it ends, the displacement is equal to 0, therefore, the velocity is equal to 0 km/h

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2 years ago

A 38,500 kg sphere is located 2.55 m from a 15,400 kg sphere. What is the gravitational force, rounded to the nearest thousandth

kkurt [141]

The gravitational force between the two spheres is 0.006 N

Explanation:

The magnitude of the gravitational force between two objects is given by

$F=G\frac{m_1 m_2}{r^2}$

where

$G=6.67\cdot 10^{-11} m^3 kg^{-1}s^{-2}$ is the gravitational constant

$m_1, m_2$ are the masses of the two objects

r is the separation between them

For the two spheres in this problem, we have

$m_1 = 38,500 kg$

$m_2 = 15,400 kg$

r = 2.55 m

Substittuting into the equation, we find

$F=(6.67\cdot 10^{-11})\frac{(38,500)(15,400)}{2.55^2}=0.006 N$

Learn more about gravitational force:

brainly.com/question/1724648

brainly.com/question/12785992

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4 years ago

The Mayans mapped out the phases of both the _____.

kolezko [41]

The phases of the Moon and Venus

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4 years ago

A car slows down from 50 mph to 35 mph in 5 seconds. Calculate its acceleration (or deceleration).

statuscvo [17]

-4.4 ft/s^2

Explanation:

Final Velocity= 35 mph

Starting Velocity= 50 mph

Elapsed Time= 5 seconds

When plugged into formula for Acceleration it is this

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2 years ago

four students push carts filled with sports equipment across the gym. Each student pushes with the same amount of force. which c

anastassius [24]

The cart that has the smallest mass of sports equipment in it
has the greatest change in speed. We know this from Newton's
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If several objects have the same force acting on them, then the one
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3 years ago

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