At the beginning of a basketball game, a referee tosses the ball straight up with a speed of 4.6 m/s. a player cannot touch the ball until after it reaches its maximum height and begins to fall down. what is the minimum time that a player must wait before touching the ball? s

Answer:

You will feel more weight if it is accelerating out of the planet.

You will feel less weight if it is accelerating towards the planet.

Explanation:

The weight that you are observing or feeling is basically due to the change in acceleration of your fall or rising up in the spaceship. When the acceleration is stationary on the surface, you experience your normal weight due to the gravitational acceleration of that planet.

When the spaceship accelerates above or out of the planet you experience acceleration more than the acceleration of gravity hence more weight.

When the spaceship accelerates towards the planet you experience acceleration less than the acceleration of gravity hence less weight.

If the spaceship is free falling at the gravitational acceleration you experience a zero weight

Intake

⬇️

Compression

⬇️

Power

⬇️

Exhaust

Therefore, the correct answer choice is D.

+ ⭐⭐⭐⭐⭐

Answer: The correct answer is convex lenses can produce images larger than objects.

Explanation:

Convex lens is a type of spherical lens in which two spherical surface bulge outwards. This type of lens is known as double convex lens or simply convex lenses.

These lenses are known as converging lenses because they converge the light rays passing through it to one point. The image formed by these lens depends on the location of the object. In one case, it produces an enlarged image.

Concave lenses only produces only image which is reduced in size than the object.

In microscopes, the object used is very very small and to view its enlarged image, only convex lenses are used.

Hence, the correct answer is convex lenses can produce images larger than objects.

Answer:

 Option C is the correct answer

Explanation:

  We have equation of motion , , s is the displacement, u is the initial velocity, a is the acceleration and t is the time.

  In this case initial velocity = horizontal velocity = 100 m/s, acceleration = 0 , we need to calculate displacement when time = 1.3 seconds.

  Substituting

    So, bullet will travel a distance of 130 meter  in 1.3 seconds.

Option C is the correct answer

Answer:

B) because electromagnetic waves transmit energy without compressing the particles of the medium

Explanation:

Electromagnetic waves are the combination of electric and magnetic field which will oscillate perpendicular to each other. And the propagation of wave here is perpendicular to both electric and magnetic field.

So here in this type of wave propagation we do not require any medium as this is propagation of electric and magnetic field.

So here no need of compression or rarefaction of medium molecules and hence it do not need any medium to travel

so here correct answer is

B) because electromagnetic waves transmit energy without compressing the particles of the medium