Explanation

• Satellites in orbit around the Earth use sensors and cameras to collect data and images of the planet's surface, atmosphere, and oceans.
• It enabling remote sensing applications such as land use mapping, crop monitoring, and natural disaster management.

Explanation

• A spacecraft is a man-made object designed to perform specific tasks in space.
• Such as exploration, communication, or research. 
• Examples of spacecraft include satellites, space stations, and probes.

Explanation

• A barometer measures atmospheric pressure by measuring the height of a mercury column that is supported by the pressure of the surrounding air.
• The higher the mercury column, the higher the atmospheric pressure.

Explanation

• Amplitude is the maximum displacement of a wave from its equilibrium position.
• It is the distance from the rest position to the top of a crest or the bottom of a trough.

Explanation

A spectrum is a band of seven colors that appear when white light is passed through a prism or a similar device, separating the different wavelengths of light.

The seven colors of the spectrum, in order, are:

1. Red
2. Orange
3. Yellow
4. Green
5. Blue
6. Indigo
7. Violet

Explanation

Binoculars use a combination of lenses and prisms to magnify and redirect light, relying on total internal reflection to ensure minimal light loss and a bright, clear image.

Explanation

• Navigation satellites, such as GPS (Global Positioning System), GLONASS, and Galileo.
• They are used to provide location information and precision timing signals to GPS receivers on the ground.
• It allowing for precise navigation and tracking of vehicles, ships, and aircraft.

Explanation

• Axe, Knife, and Push pin are all examples of wedges, as they are used to split, separate, or lift things.
• Ramp is an inclined plane used to lift or move heavy objects, but it is not a wedge.

Explanation

The EMF induced across the ends of a wire moving through a magnetic field can be calculated using the formula:

E = Blv

Where:

• E is the induced EMF in volts
• B is the magnetic flux density in teslas
• l is the length of the wire in meters
• v is the velocity of the wire in meters per second

Given:

B = 0.10 T

l = 0.20 m

v = 3.0 m/s

Substituting the values into the formula, we get:

E = 0.10 x 0.20 x 3.0

E = 0.06 V

Explanation

Impossible Situation:

Constant velocity requires zero acceleration (Newton’s First Law).

Variable acceleration would imply a changing net force, which must alter velocity (contradicting "constant velocity").

Possible Situations:

Zero velocity, non-zero acceleration:

Example: A ball at the top of its vertical toss (v=0, a=9.8 m/s² downward).

Velocity east, acceleration west:

Example: A car moving east while braking (deceleration acts west).

Velocity east, acceleration east:

Example: A car speeding up in the east direction.