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
Mekhanik [1.2K]
2 years ago
15

Hello :) how to do 25 (b) ?

Physics
1 answer:
sp2606 [1]2 years ago
3 0

Answer:

Explanation:

You first solve point a by finding the components < R_x; R_y > of the resulting vector, which will be

< 0 + 40 \times cos 30\° + 30 \times cos (- 50\°); 20 + 40 \times sin 30\° + 30 \times sin (-50\°) >

Notice that since the 50° angle is taken clockwise, we consider it negative, while the 30° is considered positive.

Plugging the values in a calculator or a spreadsheet (if you are using excel or similar programs, don't forget to convert the angle in radians!) you will get the components, namely < 53.92;17.02 >

At this point magnitude is defined as R = \sqrt{R_x^2 + R_y^2} while for direction you first take the ratio R_y/R_x and again, with a calculator, you get the inverse tangent of it. The result will be a number between -\frac{\pi}2 and \frac\pi2 (-90° and 90°) which tells you the angle the line containing your vector forms with the positive x axis, in our case it's tan^-^1 (53.92/17.02) \approx 17.52 (ie, it sits on the red line)

At this point, based on the fact that both are positive, the end point of the vector is in the first quadrant.

You might be interested in
These are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine that have created a hole in the oz
yarga [219]
Hello! The nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine that have created a hole in the ozone layer are the Chlorofluorocarbons (CFCs)

These are compounds developed and improved by Thomas Midgley in the late 1920s. They were used as refrigerants and aerosol propellants.

These compounds created a hole in the ozone layer by the following reactions:

CCl₃F → CCl₂F· + Cl· (In the presence of light. Radical Reaction)
Cl· + O₃ → ClO + O₂
ClO + O₃ → Cl· + O₂ 

The last 2 reactions can repeat in a radical mechanism and explain why these compounds are so harmful to the ozone layer. 
4 0
3 years ago
How does this diagram demonstrate the law of superposition?
Mandarinka [93]

Answer:

well, as u can tell the top layer will always be the youngest layer aka the newest layer. The farther u go down the older the layers get. So the deeper u dig the farther back in time we see.

Explanation:

8 0
2 years ago
Read 2 more answers
Consider the rocket in the image. Which unbalanced force accounts for the direction of the net force of the rocket ?
Wittaler [7]

Answer:

unbalenced force

Explanation:

make Brainliest  plz

3 0
3 years ago
Read 2 more answers
an empty propane tank dropped from a hot air balloon hits the ground with a speed of 143.8 m/s. from what height was the tank re
vodomira [7]
What you know:
Vi=0m/s
Vf=143.8m/s
A=-9.8m/s
d=???
Use the equation Vf^2=Vi^2+2A(d)
Rearrange to isolate d: d=Vf^2/2A
d=(143.8)^2/2(-9.8)
d=20678.4/-19.6
d=-1055m
The tank was released from a height of 1055m
8 0
3 years ago
___________________ uses the heat energy from the Earth. This type of alternative energy can be installed basically anywhere in
olga nikolaevna [1]

Answer:

Geothermal!!

Explanation:

Geo means earth! Just like Hydro means water, and Pyro means fire :)

8 0
2 years ago
Other questions:
  • A car travelling at 40 m/s comes to a halt in 8 seconds. What is the car’s acceleration and how far does it travel while it is s
    11·1 answer
  • If it were possible to remove gravity and friction, think about what would happen to a football if it were tossed into the air.
    7·2 answers
  • A mass spectrometer is being used to separate common oxygen-16 from the much rarer oxygen-18, taken from a sample of old glacial
    9·1 answer
  • What is the correct definition of a fracture?
    13·1 answer
  • The term relative intensity is used to denote the amount of energy expended per minute.
    5·1 answer
  • Power is work done over a what?
    7·1 answer
  • What factors affect potential energy
    12·2 answers
  • What is the correct answer?
    9·1 answer
  • 25.Figure 22.22 shows a plot
    15·1 answer
  • A 2.8 kg rectangular air mattress is 2.00 m long, 0.500 m wide, and
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!