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3 years ago

Sand is made of different types of rocks. The shapes and sizes are not all the same. Sand is a ----?

Physics

2 answers:

Nookie1986 [14]3 years ago

7 0

Answer:

mixture

 sand is a mixture

GenaCL600 [577]3 years ago

3 0

Answer:

A soil

Explanation:

Sand is a granular material composed of finely divided rock and mineral particles. It is defined by size, being finer than gravel and coarser than silt. Sand can also refer to a textural class of soil or soil type; i.e., a soil containing more than 85 percent sand-sized particles by mass.

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A small convex mirror is placed 60 cm from the pole and on the axis of a large concave mirror of radius of curvature 200 cm. The

umka2103 [35]

Answer:

Calculate 'R' of convex mirror and height of the real image

the radius of the convex mirror is 48cm

Explanation:

Distance between convex and concave mirror is =60cm

Radius of the concave mirror (R) = 200cm

For the concave mirror, u = ∞

V = {R}/{2}=100cm

The object for the convex mirror and the final image is on the pole of the concave mirror, and distance between convex and concave mirror is 60cm

u_1=60-100 =-40cm

Object will be behind the convex mirror

1/f=1/40+1/60

f=24cms

the radius of the convex mirror is 48cm

6 0

3 years ago

If an engine can produce 670 J of energy in 1 min, how many watts can it output?

daser333 [38]

Answer:

11.2Watts

Explanation:

Given parameters:

Energy produced by the engine = 670J

Time taken = 1min = 60s

Unknown:

Number of watts it can output = ?

Solution:

This problem entails finding the power of the engine.

Power is the rate at which work is being done.

So;

Power = $\frac{Work done }{time}$

Power = $\frac{670}{60}$ = 11.2Watts

6 0

3 years ago

The towline exerts a force of p = 4 kn at the end of the 20-m-long crane boom. if u = 30, determine the placement x of the hook

Illusion [34]

Answer:

The answer is 80 kN . m (clockwise)

Explanation:

As,

M = P x L

Here, the towline exerts a force is P.

Substituting P for 4000N.

M = -4000N x 20m

= -80000N.m

= 80kN.m

Maximum moment about the point O is 80kN.m (Clockwise)

7 0

3 years ago

Use Kepler's third law to find the planet's average distance (semimajor axis) from its star. (Hint: Because the mass of the star

konstantin123 [22]

Answer:

Explanation: The planet average distance = 42300km

Kepler's 3rd Law also known as the Harmonic Law states that;

for each planet orbitting the sun, its side real period squared divided by the cube of the semi-major axis of the orbit is a constant.

A planet, mass m, orbits the sun, mass M, in a circle of radius r and a period t. The net force on the planet is a centripetal force, and is caused the force of gravity between the sun and the planet.

Please find the attached file for the solution

3 0

3 years ago

Rotor windings in wound rotor motors are connected to ? on the shaft of the motor. Brushes allow those windings to be connected

Mashutka [201]

Answer:

Slip Rings

Explanation:

The wound rotor motor has a three-phase winding with each one connected to seperate slip rings. These slip rings contain brushes which form a secondary circuit where resistance can be inserted and this will allow for the rotor current to run more in phase with the stator current which will result in increased torque that is created

6 0

3 years ago

Sand is made of different types of rocks. The shapes and sizes are not all the same. Sand is a ----?​

Sand is made of different types of rocks. The shapes and sizes are not all the same. Sand is a ----?