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
topjm [15]
3 years ago
5

A 2.2-kg model rocket is launched vertically and reaches an altitude of 70 m with a speed of 30 m/s at the end of powered flight

, time t = 0. As the rocket approaches its maximum altitude it explodes into two parts of masses mA = 0.77 kg and mB = 1.43 kg. Part A is observed to strike the ground 80 m west of the launch point at t = 6 s. Determine the position of part B at that time.
Engineering
1 answer:
kirill115 [55]3 years ago
8 0

Answer:

r_b= (30.8\hat{i} + 69.96 \hat{j}) m

Explanation:

given,

mass = 2.2 kg

altitude(r₀) = (70 j) m

speed = 30 m/s

m_a = 0.77 kg

m_b =1.43 kg

part A strike ground (r_a)= (80 i) m

t = 6 s

r = r_0 + v_ot-\dfrac{1}{2}gt^2

r = 60\hat{j} + (30\hat{j})\times 6-\dfrac{1}{2}\times 9.8 \times 6^2

r = 63.6 j m

by conservation of energy

mr = m_ar_a+m_br_b

2.2\times 63.6\hat{j} = 0.77\times (-80 \hat{i})+2\times r_b

r_b= (30.8\hat{i} + 69.96 \hat{j}) m

You might be interested in
Ma poate ajuta cineva?
kari74 [83]
Da, sigur. cu ce ai nevoie de ajutor?
5 0
3 years ago
A steel bolt has a modulus of 207 GPa. It holds two rigid plates together at a high temperature under conditions where the creep
VikaD [51]

Answer:

14.36((14MPa) approximately

Explanation:

In this question, we are asked to calculate the stress tightened in a bolt to a stress of 69MPa.

Please check attachment for complete solution and step by step explanation

7 0
3 years ago
To find the reactance XLXLX_L of an inductor, imagine that a current I(t)=I0sin(ωt)I(t)=I0sin⁡(ωt) , is flowing through the indu
Sophie [7]

Answer:

V(t) = XLI₀sin(π/2 - ωt)

Explanation:

According to Maxwell's equation which is expressed as;

V(t) = dФ/dt ........(1)

Magnetic flux Ф can also be expressed as;

Ф = LI(t)

Where

L = inductance of the inductor

I = current in Ampere

We can therefore Express Maxwell equation as:

V(t) = dLI(t)/dt ....... (2)

Since the inductance is constant then voltage remains

V(t) = LdI(t)/dt

In an AC circuit, the current is time varying and it is given in the form of

I(t) = I₀sin(ωt)

Substitutes the current I(t) into equation (2)

Then the voltage across inductor will be expressed as

V(t) = Ld(I₀sin(ωt))/dt

V(t) = LI₀ωcos(ωt)

Where cos(ωt) = sin(π/2 - ωt)

Then

V(t) = ωLI₀sin(π/2 - ωt) .....(3)

Because the voltage and current are out of phase with the phase difference of π/2 or 90°

The inductive reactance XL = ωL

Substitute ωL for XL in equation (3)

Therefore, the voltage across inductor is can be expressed as;

V(t) = XLI₀sin(π/2 - ωt)

3 0
3 years ago
How does a rudder help maneuver an airplane?
Nonamiya [84]
It’s just helps it like
4 0
3 years ago
(1.24) Consumer Reports is doing an article comparing refrigerators in their next issue. Some of the characteristics to be inclu
kondaur [170]

Answer:

“height is a quantitative variable ”

Explanation:

According to the question asked, answer is “height is a quantitative variable ”

Height is a quantitative variable because it is related to the measurement and in measurement, when we measure something we deal with number (numerical data)

Numerical data is a type of quantitative data that is why we say “height is a quantitative variable”  

There are some other possible questions in the given paragraph which I would like to mention here,  are as following:

Which are the categorical variables in the given report?

<u>Answer: </u>Energy star complaints

Top, Bottom or side-by-side freezer

Which are the quantitative variables in the given report?

<u>Answer:</u> Estimated Energy Consumption in kilowatts

Width, depth, and height in inches

Capacity in Cubic Feet  

What are the individuals in the report?

<u>Answer: </u>The brand name and model  

8 0
3 years ago
Other questions:
  • A solid circular rod that is 600 mm long and 20 mm in diameter is subjected to an axial force of P = 50 kN The elongation of the
    11·1 answer
  • A biotechnology company produced 225 doses of somatropin, including 11 which were defective. Quality control test 15 samples at
    10·1 answer
  • A lake with a surface area of 525 acres was monitored over a period of time. During onemonth period the inflow was 30 cfs (ie. f
    5·1 answer
  • Which of the following is an example of seeking accreditation?
    7·1 answer
  • A car is stopped at an entrance ramp to a freeway; its driver is preparing to merge. At a certain moment while stopped, this dri
    10·1 answer
  • A very large plate is placed equidistant between two vertical walls. The 10-mm spacing between the plate and each wall is filled
    11·1 answer
  • In sleep, what does REM stand for?
    10·1 answer
  • A brake caliper is considered a suspension item.<br> True<br> False
    8·1 answer
  • What is the difference between a modular home and a manufactured home?
    5·1 answer
  • Planetary gears require the armature to be offset via a gear housing that holds the starter drive.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!