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2 years ago

Can you answer these 2 ?

Physics

1 answer:

vredina [299]2 years ago

4 0

Answer:

1. 38,500

2. 308,000

Explanation:

This would require a calculator. To find momentum, you multiply mass and velocity. You always want your mass to be measure in kilograms, but that is irrelevant in this question because they already are, it is just something to remember.

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Whats is physical energy

vampirchik [111]

Is related to interfere on raw physical matter (Masses and Bodies)

7 0

3 years ago

Read 2 more answers

Two different blocks of ice sit on the level floor of a meat packing plant. Yasmeen pushes with a horizontal force of magnitude

vlada-n [284]

Answer:

The mass is $m_1 = 3m$

Explanation:

Generally from Newton law for the first block

$F = ma$

=> $a = \frac{F}{m}$

For the second block the force is $F_1 = 2F$ and the acceleration is $a_1 = \frac{2a}{3}$

So from Newton law

$2F = m_1*\frac{2a}{3}$

=> $3F = m_1 * a$

substituting for a

=> $3F = m_1 * \frac{F}{m}$

=> $m_1 = 3m$

4 0

3 years ago

Differences between plastic and metal

beks73 [17]

Answer:

Differences are listed below:

Explanation:

Weight: Plastic can weigh appreciably much less than than metal.A plastic part weighs approximately one-sixth of the same part in steel.

Chemical resistance:Plastic are much less likely to suffer chemical attack and don not corrode.

Machinability: Plastic are much more easier to cut through than metal.

Product life: The life span for plastic is longer than of the metals in many applications.

Cost: The cost of plastic raw materials is appreciably less than of the metals.

Heat: Plastic are less heat resistive than metals.

Ultraviolet light can degrade the plastics soon.

Strength: Metal provides more strength than the plastic.

6 0

3 years ago

A grinding wheel is in the form of a uniform solid disk of radius 7.00 cm and mass 2.00 kg. It starts from rest and accelerates

Veronika [31]

Answer:

Part a)

$t = 1.03 s$

Part b)

$N = 10.3 rev$

Explanation:

Mass of the disc is given as

m = 2.00 kg

radius of the disc is given as

r = 7 cm

so moment of inertia of the disc is given as

$I = \frac{1}{2}mr^2$

$I = \frac{1}{2}(2)(0.07)^2$

$I = 4.9 \times 10^{-3} kg m^2$

Now given that torque on the disc is

$\tau = 0.600 Nm$

so here the angular acceleration is given as

$\alpha = \frac{\tau}{I}$

$\alpha = \frac{0.600}{4.9 \times 10^{-3}}$

$\alpha = 122.45 rad/s^2$

Part a)

if disc start from rest and then achieve final speed as 1200 rpm then

$f = 1200/60 = 20 rev/s$

so final speed is

$\omega = 2\pi(20) = 40\pi rad/s$

now the time taken to reach this speed is given as

$\alpha t = \omega$

$(122.45) t = 40\pi$

$t = 1.03 s$

Part b)

Number of revolution in the same time is given as

$N = \frac{\omega_o + \omega}{4\pi} t$

$N = \frac{40\pi + 0}{4\pi}(1.03) = 10.3 rev$

6 0

2 years ago

Identify each of the following clauses as independent or dependent:

gulaghasi [49]

Answer:

1st one is dependent

2nd is independent

3rd is dependent

4th is dependent

Explanation:

independent clauses are sentences that can be on their own and make sense dependent clauses don't make sense on their own

8 0

2 years ago