Which is a chemical change

Answers

Answer 1

Answer: a chemical change is a any change that results in the formation of new substances

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As opposed to concave lenses, which characteristic of convex lenses makes them useful in microscopes?Convex lenses can produce images larger than objects. Convex lenses can produce upright images. Convex lenses cause light rays to spread out. Convex lenses cause light rays to refract
what is the kinetic energy of a 0.50 g insect traveling in a straight line at 5.0m/s? a)6.25J b) 1.25J
Four landing sites are proposed for a lander. Data about the sites are listed in the table.A 3 column table with 4 rows. The first column is labeled landing site with entries W, X, Y, Z. The second column is labeled height above surface in meters with entries 32, 16, 35, 12. The last column is labeled acceleration due to gravity in meters per second squared with entries 1.6, 3.7, 1.6, 3.7. At which landing site would the lander have the greatest amount of gravitational potential energy? A. W B. X C. Y D. Z
C. The driver is looking at her phone and has a total reaction time of 4.6 seconds as the car is moving at a constant speed of 11 m/s. If the driver slams on her brakes and slows down at a rate of -8.2 m/s2, what is the stopping distance for the car in this situation

What is the acceleration of a 10 kg object if a force of a 3 N is applied?

Answers

The acceleration of the object is 0.3 m/s² when the force applied on the object.

What is force?

Physics defines force as the push or pull that modifies the velocity of a massed object. An external force is a force that can change a body's resting or moving condition. There is a magnitude and a direction to it.

You may measure the Force using a spring balance. The unit of force in the SI is the Newton.

According to Newton's second law of motion: force applied on any object is equal to the change in momentum of the object per unit time.

Hence, F = dP/dt

F = m dv/dt = ma

So, force = mass × acceleration

Given force applied on the object = 3 N

Mass of the object = 10 kg

Hence, the acceleration of the object is = Force ÷ mass

= ( 3 ÷ 10) m/s²

= 0.3 m/s²

Learn more about force here:

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Acceleraction = Force ÷ Mass

3N ÷ 10kg = 0.3m/s²

You dip your finger into a pan of water twice each second, producing waves with crests that are separated by 0.15 m. Determine the frequency, period, and speed of these water waves.

Answers

Frequency = rate of sploosh = 2 per second = 2 Hz.

Period = ( 1/frequency ) = 1/2 second

Speed = (wavelength) x (frequency) = (0.15m) x ( 2/sec) = 0.075 m/s .

Four landing sites are proposed for a lander. Data about the sites are listed in the table.A 3 column table with 4 rows. The first column is labeled landing site with entries W, X, Y, Z. The second column is labeled height above surface in meters with entries 32, 16, 35, 12. The last column is labeled acceleration due to gravity in meters per second squared with entries 1.6, 3.7, 1.6, 3.7.
At which landing site would the lander have the greatest amount of gravitational potential energy?

A. W
B. X
C. Y
D. Z

Answers

Answer:

B. X.

Explanation:

To determine which landing site would have the greatest amount of gravitational potential energy, we need to consider the height above the surface and the acceleration due to gravity at each site.

Gravitational potential energy is given by the formula:

Gravitational potential energy = mass x acceleration due to gravity x height

In this case, the mass of the lander is not provided, but since it is the same for all the sites, we can ignore it for the purpose of comparison. Therefore, we only need to consider the acceleration due to gravity and the height above the surface.

Looking at the table, we can see that at site X, the height above the surface is 16 meters, and the acceleration due to gravity is 3.7 meters per second squared. This means that at site X, the lander would have the highest amount of gravitational potential energy compared to the other sites.

i hoped this helped ! ⚫w⚫

Cell phone signals passing through walls is an example of A.) Reflection or scatteringB.) Absorption
C.) Transmission
D.) Emission

Answers

B.) Absorption
Cause it us measured by how much the wall absorbs and doesn’t let pass through.

Which method of calculating volume would you use if the object is irregulary shaped?

Answers

Use a graduated cylinder filled halfway with water. Place the object inside, and measure the difference of the water level before and after you put said object in the water.

...Also this is elementary/middle school science

Quan sát sóng dừng trên sợi dây dài 60cm cố định hai đầu, thấy có 3 nút (bao gồm cả hai nút hai đầu) và 2 bụng. Bước sóng của sóng lan truyền trên sợi dây là:
A. 30cm. B. 40cm. C. 20cm. D. 60cm.

Answers

Answer:

Quan sát sóng dừng trên sợi dây dài 60cm cố định hai đầu, thấy có 3 nút (bao gồm cả hai

nút hai đầu) và 2 bụng. Bước sóng của sóng lan truyền trên sợi dây là:

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