>>> A plane mirror has a reflective surface that is flat (planar). The angle of reflection equals the angle of incidence for light rays striking a planar mirror. A virtual picture is a representation of an object created at the spot where light rays appear to originate.
Hope it helps
Answer:
any smooth surface which can return back the rays of light in to the same medium is called a plane mirror.
hope it helps
what are thedisadvantages of using alcohol instead of mercury in a thermometer?
Answer:
Disadvantages. It is less durable because alcohol evaporates faster than mercury. It cannot measure high temperature because of a low boiling point. It wets the walls of the thermometer, which can adversely impact the accuracy of readings.
HURRY IM TIMED ON THIS!!
What would make oppositely charged objects attract each other more?
A. increasing the positive charge of the positively charged object and increasing the negative charge of the
negatively charged object
B. decreasing the positive charge of the positively charged object and decreasing the negative charge of the
negatively charged object
C. increasing the distance between the positively charged object and the negatively charged object
D. maintaining the distance between the positively charged object and the negatively charged object
Answer:
The correct answer is A. increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object
how much time does a stone take to reach on the surface of the earth drop from the height 20m and what will be it's acceleration due to gravity after 3 seconds
The image shown is an illustration of Kepler’s second law. An illustration with a circle representing the sun and a smaller circle representing a planet. The sun is at a focus of a draw ellipse that the planet is on. There are lines drawn radially out from the Sun to the elliptical path of the planet. The planet is at the part of the ellipse that is closest to the sun. The position of the planet is labeled W and the position opposite the planet is labeled Z. The line closest to W is labeled X and the line closest to Z is labeld Y. Which conclusion is best supported by the image? The gravitational force at W is less than the gravitational force at Y. The time needed to travel from W to X is the same as the time needed to travel from Y to Z. The gravitational force at W is the same as the gravitational force at Y. The time needed to travel from W to X is greater than the time needed to travel from Y to Z.
Answer:
B; the time needed to travel from W to X is the same as the time needed to travel from Y to Z.
Explanation:
According to Kepler's Second Law, the time it takes to travel each sweep of area is equal, the same way the area of each section is also equal. Also, this answer is correct on Edge.
Answer:
The answer is B !
Explanation:
I took the test and got it correct
Adding salt
variable)
causes the boiling temperature of the water
variable) to increase.
When salt is added, it makes it harder for the water molecules to escape from the pot and enter the gas phase, which happens when water boils, Giddings said. This gives salt water a higher boiling point, she said.
Answer:
Explanation:
Adding salt (independent variable) causes the boiling temperature of the water (dependent variable) to increase.
S_I_L_
_O_T_A_L
P_W_R
J_M_
S_E_D_
_A_S_N_
K_C_
Answer:
Football
Power
Jamm
Steady
Kick
Cho q1= 8.10 mũ -8C ; q2 = -8.10 mũ -8C . Đặt tại 2 điểm A và B cách nhau 6cm trong không khí . Xác định lực điện dung dịch lên qo = 8.10 mũ -8C đặt tại : a. CA= 4cm , CB= 10cm b. CA=CB= 5cm c. CA= 6cm , CB= 6cm
Answer:
♂️
Explanation:
♂️♂️♂️
Saturn's rings come from its ______
Answer:
Saturn's rings are thought to be pieces of comets, asteroids or shattered moons that broke up before they reached the planet, they are made of billions of small chunks of ice and rock coated with another material such as dust.
Explanation:
They are brought in by Saturn's powerful gravity :)
All the things in an experiment that must be the same to determine if the results are truly due to the experiment are called
Independent variables
Dependent variables
Control variables
Observations
Expand(Find the cube of):(x+y)³
( x + y )³
x³ + y³ + 3x²y + 3xy²
(or)
x³ + y³ + 3xy (x+y)
Please help I’ll give brainliest
Answer:
Magnetic Field
Explanation:
Your bike starts with an initial velocity of 1 m/s and you accelerate to 4 m/s in 6 seconds. How far did you travel while accelerating?
Answer:
78 m
Explanation:
Initial v = 1 m/s
a = 4 m/s²
t = 6s
[tex]x = v_{i} t + \frac{1}{2}at^{2} \\x = (1)(6) + \frac{1}{2} (4)(6)^{2} \\x = 6 + 72\\x = 78[/tex]
A ticker timer 50dots per second. When a body is pulled by a tap through the timer, the distance between the third and fourth dot is 3cm and the distance between fourth and fifth dot is 4cm.What is the acceleration of the body?
Answer:
Explanation:
Time for one dot = 1 /50 = .02 s
Distance between 3 rd and fourth dot is 3 cm and time taken to travel this distance is .02 s
velocity = 3 cm / .02 = 150 cm /s
Distance between 4 th and 5 th dot is 4 cm and time taken to travel this distance is .02 s
velocity = 4 cm / .02 = 200 cm /s
change in velocity = 200 cm/s - 150cm/s = 50 cm /s
Time taken = .02 s
Acceleration = 50 / .02 cm/s²
= 2500 cm/s²
What will be the ME of a machine that produces a 240 N work with a 300
N work input?
Given:
Solution:
Answer:
Answer:
Efficiency = 80%
Explanation:
Given the following data;
Work output = 240 N
Work Input = 300 N
To find the mechanical efficiency of a machine;
[tex] Efficiency = \frac {Out-put \; work}{In-put \; work} * 100 [/tex]
Substituting into the equation, we have;
[tex] Efficiency = \frac {240}{300} * 100 [/tex]
[tex] Efficiency = 0.8 * 100 [/tex]
Efficiency = 80%
Therefore, the mechanical efficiency of the machine is 80 percent.
Processing Questions:
Directions: Answer the questions below on a clean sheet of paper.
1. How was the result of your physical fitness test in Flexibility and muscular
strength compared to your previous assessments?
2. Did you notice some improvements? If no, what do you need to do to improve
it?
Answer:
How was the result of your physical fitness test in Flexibility and muscular
strength compared to your previous assessments?
Explanation:
describe what happens in terms of energy when you blow up a ballon and release it without trying its neck
Answer:
The answer is below
Explanation:
When a gallon is blown the air energy is saved as potential energy which is compressed inside the balloon. However, when the balloon is released without trying its neck, the air energy quickly turned to kinetic energy, in which the air energy keeps moving as the balloon float around the space.
Hence, in short, what happens in terms of energy when you blow up a balloon and release it without trying its neck is that the air energy moves from potential energy to kinetic energy.
Why does earth not float away from the sun?
Answer:
Because the sun's gravity holds it in its orbit
What is capacitive reactance and how to find it??
Answer:
Capacitivie reactance is the angular frequency
Explanation:
hope this helps
have a great day/night
Assuming constant volume, the pressure of a sealed system is 25.0 kPa at 25.0°C. If the temperature of the system increases by 15.0 °C, what is the new pressure of the sealed system?
Answer:
use the gas law equations
A foot is 1/3 of a yard. What part of a meter is a millimeter?
1/2
1/5
1/100
1/1000
Answer:
Explanation:
1/1000
If a foot is 1/3 of a yard the 1/1000 part of a meter is a millimeter, therefore the correct answer is option D.
What is a unit of measurement?A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.
Any additional quantity of that type can be stated as a multiple of the measurement unit.
As given in the problem a foot is 1/3 of a yard then we have to find out what part of a meter is a millimeter,
1 meter = 100 centimeters
1 centimeters = 10 millimeters
1 meter = 100×10 millimeters
1 meter = 1000 millimeters
1 millimeters = 1/1000 meter
Thus, the 1/1000 part of a meter is a millimeter, therefore the correct answer is option D.
Learn more about the unit of measurement from here;
brainly.com/question/12629581
#SPJ6
An elevator car weighs 5500 N. If the car accelerates upwards at a rate of 4.0 m/s2, what is the tension in the support cable lifting the car? Use g = 10 m/s².
Answer:
Explanation:
The equation for this, since we are talking about weight on an elevator, is Newton's 2nd Law adjusted to fit our needs:
[tex]F_n=ma+w[/tex] where the Normal Force needed to lift that elevator car is the tension. So the equation then becomes
T = ma + w where T is the tension in the cable to lift the elevator, m is the mass of the elevator (which we have to solve for), a is the acceleration of the elevator (positive since it's going up), and w is the weight of the elevator (which we have as 5500 N). Solving first for mass:
w = mg and
5500 =- m(10) so
m = 550 kg. Now we have what we need to solve for the tension:
T = 550(4.0) + 5500 and
T = 2200 + 5500 so
T = 7700 N
Tension in the support cable which is lifting the car is 7700 N. The tension is a type of pulling force developed on a string or cable which is lifting the car.
What is Tension?
Tension is defined as the pulling force which is transmitted axially by the means of a string of an elevator. This tension is a result of action-reaction pair of forces which act at each end of the elements.
The weight on an elevator can be calculated by Newton's 2nd Law of motion:
w = mg
where, w = weight of the object,
m = mass of the object,
g = acceleration due to gravity
Here the Normal Force is needed to lift that elevator car is the tension. So, the tension can be calculated by the equation as follows:
T = ma + w
where, T = tension in the cable to lift the elevator,
m = mass of the elevator,
a = acceleration of the elevator,
w = weight of the elevator
By substituting the values in this equation:
w = mg
5500 = m(10)
m = 550 kg
The tension in the support is
T = 550(4.0) + 5500
T = (2200 + 5500)
T = 7700 N
Therefore, the value of tension on the cable is 7700 N.
Learn more about Tension here:
https://brainly.com/question/14294135
#SPJ2
. It requires 250 N to lift up a bag full of hockey equipment. How much work is done while carrying it 12 m down the stairs into the basement?
( only need answer no work is needed )
Answer:
Explanation:
Work = force times displacement, therefore,
W = 250(12) so
W = 3.0 × 10³ N*m
Anwser this Question , i will Brainelist .
Answer:
D option
Explanation:
7.
The speed of an electromagnetic wave is a constant, 3.0 x 108 m/s. The wavelength of a wave is 0.6 meters.
What is the frequency?
1.8 Hz
5.0 Hz
5.0 x 108 Hz
O 1.8 x 108 Hz
4. A current of 3.00 A flows through a resistor when it is connected to a
12.0 - V battery. What is the resistance of the resistor?*
2.4 ohms
36 ohms
4 ohms
0.3 ohms
Answer:
V=IR
12 = 3 ×RESISTANCE
RESISTANCE=12/3
=4 Ohms
answer is the third option
Electromagnetic waves travel at a speed of 3.0 x 108 m/s. A radio station transmits waves
with a wavelength of 2.5 x 102 m.
Calculate the frequency of the radio waves.
Answer:
1.2×10⁶ Hz
Explanation:
Applying,
v = λf............. Equation 1
Where v = speed of wave, λ = wavelength, f = frequency.
make f the subject of the equation
f = v/λ............... Equation 2
From the question,
Given: v = 3.0×10⁸ m/s, λ = 2.5×10² m
Substitute these values into equation 2
f = 3.0×10⁸/2.5×10²
f = 1.2×10⁶ Hz
Please help ASAP -multiple choice- will give brainliest
Answer:
C. An article written by a scientist
Explanation:
Research-based original articles written by a scientist can act as a primary source of information. Textbooks, dictionaries and encyclopedias are generally classified as secondary sources and are rarely primary sources.
How fast is a 150 kg object going if its momentum is 600 kg m/s?
Answer:
v = 4 m/s
General Formulas and Concepts:
Momentum
Momentum Formula: p = mv
p is momentum (in kg · m/s)m is mass (in kg)v is velocity (in m/s)Explanation:
Step 1: Define
Identify variables
[Given] p = 600 kg · m/s
[Given] m = 150 kg
[Solve] v
Step 2: Solve for v
Substitute in variables [Momentum Formula]: 600 kg · m/s = (150 kg)vIsolate v [Cancel out units]: 4 m/s = vRewrite: v = 4 m/sCan anybody answer number 3 please hurry
Answer:
I think it's second choice
Blank is the time rate of change in velocity
Acceleration is the time rate of change in velocity.
Acceleration = Rate of change of velocity