Answer:
this is question is trying to trick you
Explanation:
it gives long words but all you need to know is just a few
the second law of reflection states that the angle of incidence equals to the angle of reflection
so if the angle of incidence = 30
then
the angle of reflection = 30
hope this helps,
please mark it brainliest
An endothermic reaction is one in which heat is transferred from the surroundings to the reactants.
Please select the best answer from the choices provided
T
F
Answer:
An endothermic reaction is one in which heat is transferred from the surroundings to the reactants.------- true
Answer:
T . Energy is transferred to the reactants
Explanation:
Will the sun explode in future?
Answer:
Explanation:
The Sun won't explode. ... Eventually (in five or seven billion years time), the Sun's life will come to an end. Our star will swell up, becoming something called a “Red Giant” star. It might even get so big that it swallows the Earth whole.
The mass of an object is the measure of what characteristic of the object?
O A. its volume
OB. the space it occupies
O c. the amount of matter it has
O D. its weight
please help asap
What is the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms?
Answer:
45 AmpereExplanation:
R=V/I I=V/R V = 9 R=0.2 I = 9/0.2 = 9×10/0.2×10 =90/2 ie, I =45 AThe current produced by a 9-volt battery flowing through a resistance of 0.2 ohms would be 45 Ampere.
What is resistance?
Resistance is the obstruction of electrons in an electrically conducting material.
The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law.
V=IR
As given in the problem we have to find the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms.
current produced by a 9-volt battery = voltage /resistance
= 9 volt /0.2 ohms
= 45 Ampere
Thus, the current produced would be 45 Ampere.
Learn more about resistance from here, refer to the link;
brainly.com/question/14547003
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what are some ways to increase gravitational potential energy?
Answer:
Increase height
Increase mass
The strength of a gravitational force between two objects depends on
A. mass and volume.
B. distance and volume.
C. mass and distance.
D. size and shape.
Reset Submit
Answer:
C. mass and distance.
Explanation:
The strength of a gravitational force between two objects depends on mass and distance.
Plz help me plzzz. I'm begging you
Answer:
a then c then b
Explanation:
The section of the lever to the right of the fulcrum could be described as the?
Answer:
Input Force
Explanation:
Answer:
resistance distance.
Explanation:
What does the potential energy of an object depend on?
Answer:
The amount of gravitational potential energy an object has depends on its height and mass. The heavier the object and the higher it is above the ground, the more gravitational potential energy it holds.
Hope this helps :)
A student mixes two substances in a large beaker. After two hours, the student sees that the substances have separated again.
The full question is found in the image attached
Answer:
Densities
Explanation:
When we talk about density, one of the things that come to our mind is actually how heavy something is.
If i have substances that possess different densities, i will notice that i can not really mix them because they will separate and the heavier substance will be at the bottom while the lighter substance will be at the top.
Hence the two substances separated due to difference in density.
The formation of new elements through the process of fusion in a star’s core stops at iron. How are elements larger than iron formed?
Answer:
During a supernova, the star releases very large amounts of energy as well as neutrons, which allows elements heavier than iron, such as uranium and gold, to be produced. In the supernova explosion, all of these elements are expelled out into space.
hope this helps.
Explanation:
A plane flies along a straight line path after taking off, and it ends up 90.0 km farther east and 200.0 km farther north, relative to where it started. In what direction did it fly on the straight line path?
27° north of east
45 ° north of east
24° north of east
66° north of east
Answer:
24° north of east
Explanation:
tan(x)=90/200 ie x=arctan(90/200)=24°
So the plane took off 24° east.
Answer:
24° north of east
Explanation:
Hope this will help
A car accelerates from rest at 3.5 m/s2 for 6.5 seconds what is the cars final speed
Answer:
please find attached pdf
Explanation:
Ee = %2 xkx e?. Re-arrange to give an equation for:
a) The spring constant k.
b) The extension squared e2.
c) The extension e.
Answer:
a) Equation for spring constant k is [tex]k = \frac{2E}{e^2}[/tex]
b)Equation for the extension squared is [tex]e^2 = \frac{2E}{k}[/tex]
(c) Equation for the extension e is [tex]e = \sqrt{\frac{2E}{k} }[/tex]
Explanation:
Given;
[tex]E = \frac{1}{2} ke^2[/tex]
where;
E is the elastic potential energy
k is the spring constant
e is the extension of the spring
a) Equation for spring constant k is given as.
[tex]E = \frac{1}{2} ke^2\\\\ke^2 = 2E\\\\k = \frac{2E}{e^2}[/tex]
(b) Equation for the extension squared e2;
[tex]E = \frac{1}{2} ke^2\\\\ke^2 = 2E\\\\e^2 = \frac{2E}{k}[/tex]
(c) Equation for the extension e;
[tex]e^2 = \frac{2E}{k} \\\\e = \sqrt{\frac{2E}{k}}[/tex]
C + H2 ----------> CH4
Answer:
yes
.......................
Answer:
C + 2H2 -----> CH4
A spring has a force constant of 40000 N/m.
How far must it be stretched for its potential energy to be 42 J?
Answer in units of m
Answer:
0.05m
Explanation:
Given parameters:
Force constant of the spring = 40000N/m
Potential energy = 42J
Unknown:
Extension = ?
Solution:
To solve this problem, use the expression below:
E.PE = [tex]\frac{1}{2}[/tex] k e²
k is spring constant
e is the extension
42 = [tex]\frac{1}{2}[/tex] x 40000 x e²
e = 0.05m
A brick has a density of 21.6 g/cm3 and a mass of 15.4 g. What is the volume of
the brick?
What is a wind turbine often used for?
Answer:
Wind Turbines are used in a variety of applications from harnessing offshore wind resources to generating electricity for a single home.
Explanation:
