1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alisiya [41]
3 years ago
13

A package is dropped from a hovering helicopter.

Physics
1 answer:
aivan3 [116]3 years ago
4 0

Answer:

The height of the package when it was released was 1102.5 meters

Explanation:

A package is dropped from a hovering helicopter

Dropped means the initial velocity of the package is zero

The package takes 15 seconds to strike the ground

Ignore the air resistance

We need to know the height of the package when it was released

h=ut+\frac{1}{2}gt^{2}, where h is the height of the package

from the ground, u is the initial velocity, g is the acceleration of gravity

and t is the time

u = 0 , t = 15 seconds , g = 9.8 m/s²

h=(0)(15)+\frac{1}{2}(9.8)(15)^{2}

h=0+1102.5

h = 1102.5 meters

<em>The height of the package when it was released was 1102.5 meters</em>

You might be interested in
Baseball scouts often use a radar gun to measure the speed of a pitch. One particular model of radar gun emits a microwave signa
Firdavs [7]

Since the Units presented are not in the International System we will proceed to convert them. We know that,

1 mi/h = 0.447 m/s

So the speed in SI would be

V=95mi/h(\frac{0.447m/s}{1mi/h})

V=42.465 m/s

The change in frequency when the wave is reflected is

f'=f(1+\frac{V}{c})

Or we can rearrange the equation as

f' = f + f\frac{V}{c}

f' = Apparent frequency

f = Original Frequency

c = Speed of light

f'-f = f\frac{V}{c}

\Delta f = f\frac{V}{c}

Replacing,

\Delta f = (10.525*10^9)(\frac{42.465}{3*10^8})

\Delta f =1489.8 Hz

Since the waves are reflected, hence the change in frequency at the gun is equal to twice the change in frequency

\Delta f_T = 2 \Delta f

\Delta f_T = 2(1489.8Hz)

\Delta f_T = 2979.63Hz

Therefore the increase in frequency is 2979.63Hz

4 0
4 years ago
To what temperature will a 79.0 g piece of glass raise if it absorbs 9457 calories of heat and its specific heat capacity is 0.5
ruslelena [56]

Answer:

T_final = 279.4 [°C]

Explanation:

In order to solve this problem, we must use the following equation of thermal energy.

Q=m*C_{p}*(T_{f}-T_{i})

where:

Q = heat = 9457 [cal]

m = mass = 79 [g] = 0.079 [kg]

Cp = specific heat = 0.5 [cal/g*°C]

T_initial = initial temperature = 40 [°C]

T_final = final temperature [°C]

9457 = 79*0.5*(T_{f}-40)\\239.41=T_{f}-40\\\\T_{f}=279.4[C]

8 0
3 years ago
If an automobile airbag inflates in 25 µs, what is the time in seconds?
kotegsom [21]
That is 19 seconds cuz of the fast inplosion
7 0
3 years ago
Reactants → products
Nat2105 [25]
The answer is A

Explanation: the conservation of matter means that the mass stays the same
4 0
3 years ago
Read 2 more answers
in mammal the weight of the heart approximately 0.5% total body weight write linear model that gives the heart weight in terms o
maks197457 [2]

Let the total weight of the body be = x

Let the weight of the heart of the mammals be = y

Now the given percentage of 0.5 %, we will convert it into decimal form,

so this is equal to 0.005 in decimal form,


so the linear equation that gives the heart weight in terms of body weight will be,

y = 0.005x


7 0
4 years ago
Other questions:
  • If the loss of 3500 kcal is equal to a loss of 1.0 lb, how many days will it take charles to lose 5.0 lb
    13·1 answer
  • If an object has a mass of 26 g on earth would its mass be less than 26 g on the moon
    14·1 answer
  • Give examples of at least three critical questions of society that science can help answer.
    13·1 answer
  • Three resistance 4,4 and 6 ohms are joined in the series.The total resistance will be
    12·2 answers
  • A mass of 0.273 kg is placed on an incline of 38.382 degrees. It is attached by a rope over a pulley to a mass of 0.254 kg. Find
    10·1 answer
  • What is represented by the slope of the line at point A? A. average acceleration B. constant velocity C. free fall D. speed
    13·2 answers
  • Peyote contains a psychotropic drug called __________.
    8·1 answer
  • Thought Experiment: A monkey escapes from a zoo and climbs a tree. After failing to entice the monkey down, a zookeeper fires a
    6·1 answer
  • Terry usually rides his bike at 15 mph. If his riding speed is reduced by 3 mph, how far can he ride in 1.7 hours? ​
    10·1 answer
  • A 500N force applied against an unmoving object does 0J of work <br> Please help it’s a test !!!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!