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3 years ago

A flat, square surface with side length 4.35 cm is in the xy-plane at z=0.

Physics

1 answer:

Hunter-Best [27]3 years ago

4 0

Answer:

I X j = k (perpendicular to plane)

j X k = 0

i X k = 0 cross products for vectors i, j, k

Flux = B dot A and only B in the k direction is relevant

Flux = .550 T * .0435^2 m^2 = .00104 Webers-m^2

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A concrete block is hung from an ideal spring that has a force constant of 100 N/m . The spring stretches 0.129 m .A- What is th

madam [21]

Answer:

1.31498 kg

0.72050 s

Explanation:

m = Mass of block

g = Acceleration due to gravity = 9.81 m/s²

k = Spring constant = 100 N/M

x = Displacement = 0.129 m

The force balance is

$mg=kx\\\Rightarrow m=\dfrac{kx}{g}\\\Rightarrow m=\dfrac{100\times 0.129}{9.81}\\\Rightarrow m=1.31498\ kg$

The mass of the block is 1.31498 kg

Time period is given by

$T=2\pi\sqrt{\dfrac{m}{k}}\\\Rightarrow T=2\pi\sqrt{\dfrac{1.31498}{100}}\\\Rightarrow T=0.72050\ s$

The period of oscillations is 0.72050 s

The time period does not depend on the acceleration due to gravity. It varies with the mass and the spring constant.

Hence, the time period would be the same

8 0

3 years ago

You fire a projectile 35° above horizontal with an initial velocity of 200m/s. It lands in a valley 300m below the launch point.

Brilliant_brown [7]

Answer:

See below

Explanation:

Vertical component of initial velocity = 200 sin 35° = 114.72 m/s

then use position formula a = 9.81 m/s^2

0 = 300 + 114.72 t - 1/2 (9.81)(t^2)

use quadratic formula with a = - 4.905 b = 114.72 c = 300

to find t = 25.76 seconds

To find the range

( horizontal distance the projectile lands from launch point)

Horizontal component of initial velocity 200 cos 35 = 163.83 m/s

( it flies horizontally at this speed for 25.76 seconds <==found above)

163.83 m/s * 25.76 s = 4220.3 meters

3 0

2 years ago

An object is transported to three different planets in our solar system. Which of the following is true about that object?

Digiron [165]

Answer;

D. The object’s weight changes, but its mass stays the same.

Explanation;

Mass is the amount of matter in a object, which is measured in kilograms. Mass of an object is measured using a beam balance. It is important to note that the mass of an object or a body remains constant, and does not vary from one place to another. For instance the mass of a person on the moon will be the same as when the person is on the earth surface.
Weight on the other hand is the measurement of gravitational pull of an object. weight is measured using a spring balance and measured in Newtons. Weight varies from one place to another depending on the gravitational pull of a given surface.

8 0

4 years ago

Read 2 more answers

A hydraulic lift is made by sealing an ideal fluid inside a container with an input piston of cross-sectional area 0.004 m2 , an

kvv77 [185]

Answer:

Maximum weight that can be lifted = 18,000 N

Explanation:

Given:

Cross-sectional area of input (A1) = 0.004 m²

Cross-sectional area of the output (A2) = 1.2 m ²

Force (F) = 60 N

Computation:

Pressure on input piston (P1) = F / A1

Assume,

Maximum weight lifted by piston = W

Pressure on output piston (P2) = W / A2

We, know that

P1 = P2

[F / A1] = [W / A2]

[60 / 0.004] = [W / 1.2]

150,00 = W / 1.2

Weight = 18,000 N

Maximum weight that can be lifted = 18,000 N

3 0

3 years ago

The ISS was the first space station to be built; it is the largest space station and is actually still under construction as of

const2013 [10]

Thank you for that exciting news bulletin.

Here are a few more to keep you up to date:

-- The armistice has been signed, as of November 11.

-- Lindy made it !

-- The Japanese have surrendered to General Macarthur.

-- Secretary Clinton has won in the popular vote.

8 0

3 years ago