How can you describe the image formed by a plane mirror?
Answers
Answer:
D
Explanation:
Related Questions
How are electromagnetic waves that are produced by oscillating charges and sound waves that are produced by oscillating tuning forks similar?
Which physical property would not be useful for finding the difference between baking soda and cornstarch? a) density b) mass c) melting point d) solubility
How do many abusive relationships begin?a.) With abuseB.) As blind datesC.) HappilyD.) Unhappily
A submarine is 46 m below sea level, and it descends 24 m. How far below sea level is it? a. The submarine is 70 m below sea level. b. The submarine is 46 m below sea level. c. The submarine is 24 m below sea level. d. The submarine is 94 m below sea level.
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air resistance, then vertical acceleration is always 9.8 m/s²
downward, and horizontal acceleration is always zero.
My apex test just corrected my original answer of 9.8 m/s^2 to 0 m/s^2.
Answers
Wow ! This is not simple. At first, it looks like there's not enough information, because we don't know the mass of the cars. But I"m pretty sure it turns out that we don't need to know it.
At the top of the first hill, the car's potential energy is
PE = (mass) x (gravity) x (height) .
At the bottom, the car's kinetic energy is
KE = (1/2) (mass) (speed²) .
You said that the car's speed is 70 m/s at the bottom of the hill,
and you also said that 10% of the energy will be lost on the way
down. So now, here comes the big jump. Put a comment under
my answer if you don't see where I got this equation:
KE = 0.9 PE
(1/2) (mass) (70 m/s)² = (0.9) (mass) (gravity) (height)
Divide each side by (mass):
(0.5) (4900 m²/s²) = (0.9) (9.8 m/s²) (height)
(There goes the mass. As long as the whole thing is 90% efficient,
the solution will be the same for any number of cars, loaded with
any number of passengers.)
Divide each side by (0.9):
(0.5/0.9) (4900 m²/s²) = (9.8 m/s²) (height)
Divide each side by (9.8 m/s²):
Height = (5/9)(4900 m²/s²) / (9.8 m/s²)
= (5 x 4900 m²/s²) / (9 x 9.8 m/s²)
= (24,500 / 88.2) (m²/s²) / (m/s²)
= 277-7/9 meters
(about 911 feet)
Answers
Answer:
As we know that heat given to a substance is given by the formula as
now we know that
now we know that aluminium and water both are of same mass and both are given same amount of heat so the value of Q and m will be same.
So here we can say that change in temperature depends inversely on the specific heat capacity.
So here if more specific heat capacity then there will be less change in temperature.
so we can conclude that since temperature of aluminium increases more so the specific heat capacity of aluminium will be less than that of water.
elastic potential energy
B.
gravitational potential energy
C.
kinetic energy
D.
chemical energy
Answers
Answer:
The answer is A.
Explanation:
It's correct in Аpex
Answers
Final Answer:
An expansion card is a circuit board that can be attached to the motherboard to add features such as video display and audio capability to the computer.
Explanation:
An expansion card, also known as an add-in card or expansion board, is a hardware component designed to enhance a computer's capabilities by providing additional functionality. These cards can be attached to the motherboard of a computer to add various features or capabilities, including video display and audio processing.
Expansion cards come in various forms and serve different purposes. For example, a graphics card is a type of expansion card that is commonly used to improve a computer's graphics performance. It can handle complex graphical tasks, making it essential for gaming, video editing, and graphic design. Another common type is the sound card, which enhances a computer's audio capabilities, enabling high-quality sound output and input for tasks like music production and gaming.
The process of adding an expansion card involves inserting it into a compatible slot on the motherboard, securing it in place, and installing the necessary drivers and software to ensure proper functionality. Most motherboards have multiple slots to accommodate various types of expansion cards, allowing users to customize their computer's capabilities based on their specific needs.
In summary, expansion cards are crucial components that enable users to expand and upgrade their computer's capabilities, whether it's for gaming, multimedia, or other specialized tasks.
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An expansion slot isa socket on the motherboard that is used to insert an expansion card which adds certain features to the computer
Answers
the spring will be compressed by 0.3072 m
Explanation:
acceleration of elevator=3 m/s²
mass of student= 60 Kg
spring constant=2.5 x 10³ N/m
the force on the student is given by F = m ( g +a)
F=60 (9.8+3)
F=768 N
now the formula for spring force is given by
F= k x
768= 2.5 x 10³ (x)
x=0.3072 m
Final answer:
The spring on which a 60kg student is standing in an elevator accelerating at 3.0 m/s² is compressed by approximately 30.72 cm. This is calculated using Hooke's Law, considering both the weight of the student and the additional force due to the elevator's acceleration.
Explanation:
The situation you've described involves Hooke's Law, which states that the force needed to extend or compress a spring by some distance is proportional to that distance. In this case, we can consider the student's weight plus the extra force from the acceleration of the elevator.
To determine the compression of the spring, we use the equation F = kx, where F is the total force exerted on the spring, k is the spring constant, and x is the amount the spring is compressed. Here, the total force (F) includes the weight of the student and the force due to the elevator's acceleration. So, F = mg + ma, where m is the mass of the student, g is the gravity (9.8 m/s²), and a is the acceleration of the elevator.
Substituting the given values, we get F = (60 kg)(9.8 m/s²) + (60 kg)(3.0 m/s²) = 768 N. The compression of the spring (x) is now obtained by rearranging the Hooke's law formula to x = F/k.
This results in x = 768 N ÷ 2.5 x 10³ N/m = 0.3072 m or 30.72 cm. Thus, the spring is compressed by approximately 30.72 cm due to the combined force of the student's weight and the accelerating elevator.
Learn more about Hooke's Law here:
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