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3 years ago

What is the difference between cementation and compaction?

1 answer:

3 0

Compaction is when sediments are buried deeply, which causes pressure because of the weight of the layers above them. This squashes the grains together more tightly. Cementation is where new minerals stick the grains together

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A basketball player wishes to make a stunning last-second basket. With .8 seconds on the clock, she wants the ball to enter the

zheka24 [161]

Answer:

(1) $46.86^\circ$

(2) Diagram has been attached in the solution.

Explanation:

This question is from projectile motion.

From the given question, we will discuss the motion of the basket ball only in the vertical direction from which we will be able to find out the angle of the initial velocity with the horizontal with which it should be shoot to enter the hoop.

Part (1):

Let us assume:

$y_i$ = initial position of the basket ball = 2.1 m
$y_f$ = final position of the basket ball = 3.05 m
$a_y$ = acceleration of the ball along the vertical = $-9.8\ m/s^2$
$t$ = time taken to reach the goal = 0.8 s
$\theta$ = angle of the initial velocity with the horizontal
$u$ = initial speed of the ball = 7 m/s
$u_y$ = initial vertical velocity of the ball = u\sin \theta

Using the equation of motion for constant acceleration, we have

$y_f-y_i=u_yt+\dfrac{1}{2}a_yt^2\\\Rightarrow 3.05-2.1=u\sin \theta (0.8) +\dfrac{1}{2}\times (-9.8)(0.8)^2\\\Rightarrow 0.95=7\times \sin \theta (0.8) -3.136\\\Rightarrow 0.95=5.6\sin \theta -3.136\\\Rightarrow 5.6\sin \theta= 0.95+3.136\\\Rightarrow 5.6\sin \theta= 4.086\\\Rightarrow \sin \theta= \dfrac{4.086}{5.6}\\\Rightarrow \sin \theta=0.729\\\Rightarrow \theta=\sin^{-1}(0.729)\\\Rightarrow \theta=46.86^\circ$

Hence, the angle of the shoot of the basket ball with the horizontal is $46.86^\circ$ such that it reaches the hoop on time.

Part (2):

For this part, a diagram has been attached.

4 0

3 years ago

A large semi-truck is moving a house from one lot to another. The amount of force required to move the house 15.A horizontally a

dlinn [17]

Answer:

252J

Explanation:

Given parameters:

Distance = 72m

Force = 3.5N

Unknown:

Work done on the house = ?

Solution:

Work done is the force applied to move a body through a particular distance.

Work done = Force x distance

Now insert the parameters and solve;

Work done = 3.5 x 72 = 252J

5 0

3 years ago

The fact that some asteroids cluster in what are called asteroid families is probably the result of:

alisha [4.7K]

Answer:

The families are thought to form as a result of collisions between asteroids. In many or most cases the parent body was shattered, but there are also several families which resulted from a large cratering event which did not disrupt the parent body (e.g. the Vesta, Pallas, Hygiea, and Massalia families).

8 0

2 years ago

Matter that does not transmit any light.

eduard

Answer:

They all travel at the same speed

Explanation: the speed of light — in a vacuum, but when they come into contact with matter, they slow down. ... Opaque objects transmit little or no visible light, translucent objects transmit some, and transparent objects transmit almost all, which is why we can see through them.

4 0

3 years ago

What would be the projectile's initial speed?

zalisa [80]

Math is the process of using the given information, along with
all the general stuff that you know, to find the missing information.
With no given information, we have no way to even guess at
an answer.

8 0

4 years ago