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
slamgirl [31]
3 years ago
9

I need help on this question, please.

Physics
1 answer:
frez [133]3 years ago
4 0

Answer:

|X| = 72 cm

Explanation:

We need to find the magnitude of vector X.

Vector Y = 21 cm

Vector Z = 75 cm

We know that, the magnitude of resultant vector is given by :

Z={X^2+Y^2} \\\\X^2=Z^2-Y^2\\\\X^2=(75)^2-(21)^2\\\\X=72\ cm

So, the value of magnitude of vector X is 72 cm

You might be interested in
The Hubble Space Telescope was released from the Space Shuttle, which was in a circular orbit at 400km earth altitude. The relat
snow_lady [41]

Answer:

d = (75 i ^ + 93 j ^ + 27 k ^) m ,  d2 = (900 i ^ + 1116 j ^ + 324 k ^) m

Explanation:

The two objects are in circular orbit together, therefore with the same angular velocity, after the launch they move with the relative velocity, so we can use the kinematic relation

       

         v = d / t

         d = v t

Reduce time to units SI

         t = 5 min (60 s / 1 min) = 300 s

X axis

         x = vₓ t

         x = 0.25 300

         x = 75 m

Y axis  

        y = v_{y} t

        y = 0.31 300

       y = 93 m

Z axis

        z=  v_{z} t

        z = 0.09 300

       z = 27 m

       d = (75 i ^ + 93 j ^ + 27 k ^) m

For the time of 1 h

       t2 = 1 h (3600s / 1 h) = 3600

       x2 = 900 m

       y2 = 1116 m

       z2 = 324 m

      d2 = (900 i ^ + 1116 j ^ + 324 k ^) m

5 0
4 years ago
Other than temperature, which property also has an effect on the rates of chemical reactions?
PSYCHO15rus [73]

Other than temperature, the property that also has an effect on the rates of chemical reactions is the concentration of the reactants. The correct answer is B

The rate of chemical reaction means how chemical react with respect to time or as a function of time. The rate of chemical reaction tells us the speed or how fast chemicals react.

There are many factors that can affect the rate of chemical reaction. Temperature is one of them. Increase in temperature will increase the rate at which chemical react.

The color of reactants, solubility of reactants and volume of reactants have nothing to do with the rate of chemical reaction.

Other than temperature, the property that also has an effect on the rates of chemical reactions is the concentration of the reactants.

Other factors affecting the rate of chemical reaction are:

  • the physical state of the reactants
  • surface area
  • temperature
  • and the presence of a catalyst

Therefore, the correct answer is option B

Learn more about chemical reaction here: brainly.com/question/11231920?source=archive

8 0
3 years ago
What happens to the compass needle as you move the compas<br> around the magnet?
Ugo [173]

Answer:

When you moved the compass near a bar magnet, the needle pointed toward the magnet's magnetic field and not toward the north.

Explanation:

4 0
3 years ago
Place the two thermometers outdoors in different locations. Place one in direct sunlight and the other in shade. Make sure that
Archy [21]

Yes

Explanation:

There would be a difference in temperature between the two places over the time interval.

What is temperature?

Temperature is the degree of hotness or coldness of a body. It is measured  using a thermometer as described in the set up.

Temperature changes is a result of heat transfer.

The sun is the ultimate source of energy for the earth.

It transfers heat to the earth by radiation.

Under a shade, the tree leaves or shed will cut off the radiation preventing it from reaching the surface. This place will be cool and at a lower temperature than expected.

The thermometer furnished with direct sunlight will have a higher temperature. As the radiation from sun hits the surface, it causes it to warm up and increase in temperature. This will cause the thermometer's temperature to also rise.

learn more:

Thermal energy brainly.com/question/914750

#learnwithBrainly

5 0
3 years ago
Do you think a population besides the moon jellies’ consumer population (sea turtles) and resource population (zooplankton) coul
kondor19780726 [428]

Answer:

I didn't quite understand your question, but the moon jelly population will increase if there are either more zooplankton or less sea turtles.

More zooplankton means more food => higher population

Less sea turtles means that the moon jelly will be lest often consumed => higher population

8 0
4 years ago
Other questions:
  • A 133-foot antenna is on top of a tall building. From a point on the ground, the angle of elevation to the top of the antenna is
    12·1 answer
  • Is there more than one kind of balance used in a laboratory
    9·1 answer
  • Which example involves the transformation of chemical energy directly into light energy?
    6·2 answers
  • As you sit on a dock, you notice a wave crest pass. you count another 16 wave crests in the next eight seconds. What is the peri
    11·1 answer
  • If the mass of a material is 43 grams and the volume of the material is 14 cm^3, what would the density of the material be
    8·1 answer
  • An amount of nitrogen undergoes a physical change and increases its volume. What can be known about this physical change?
    5·2 answers
  • Gordon throws a baseball into the air. It rises, stops when it reaches its greatest height, and then falls back to the ground. A
    9·1 answer
  • If a person was interested how light passes through clear substances, what field of science would be the best course of study?
    12·1 answer
  • How does cold water affect the speed of dissolving?
    14·2 answers
  • the distance between any two bodies is 10 M and the gravitational force between them is 3.2×10-⁹m. if the mass of one object is
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!