An arch carries the thrust of weight to its _(1). With a _(2)____, the horizontal part of the structure supports all the weight above it.a. (1) center; (2) post-and-bearing
b. (1) base; (2) springing line
c. (1) keystone; (2) groin vault
d. (1) sides; (2) post-and-lintel

Answers

Answer 1

Answer:

Arch Carries the thrust of Weight - Option D

An arch carries the thrust of weight to its sides. With a post-and-lintel, the horizontal part of the structure supports all the weight above it. The reason is that the post and lintel is a system of construction. In this the powerful parallel components are kept up by powerful upward components that has large cavities between them.

Therefore, an arch carries the thrust of weight to its sides for balancing purposes.

Answer 2

Answer:

D- i just took the test

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Charged objects have a _________ charge. A. net B. moving C. positive D. negative

Answers

Charged objects have a Net charge.

An average person can reach a maximum height of about 60 cm when jumping straight up from a crouched position. during the jump itself, the person's body from the knees up typically rises a distance of around 50 cm. to keep the calculations simple and yet get a reasonable result, assume that the entire body rises this much during the jump.

Answers

Final answer:

The question is related to Physics and deals with kinematic equations. With the supplied information, one can calculate elements such as velocity or applied force in the jump.

Explanation:

The subject of the question pertains to the field of Physics, specifically the area of kinematic equations which deal with the motion of objects. The provided information in the question pertains to the rise of a person's body during a jump. Given the average height of 60cm that a person typically attains and the approximate rise of the body from the knees up being 50cm, these figures can be used in a Physics context to determine different factors of the jump such as velocity or force applied.

For example, using the equation of motion (height = 0.5 * gravity * time^2) where gravity is around 9.8 m/s^2, you can calculate the time taken to reach maximum height. We can calculate this using the initial velocity combined with the gravity force. Furthermore, the force applied can be calculated knowing the mass of the person and the acceleration (which is the initial velocity divided by the time).

Learn more about Kinematic Equations here:

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What is true for solar, wind, and geothermal energy?

Answers

In the question "What is true for solar, wind, and geothermal energy?" The correct answer is that they are all renewable energy.
Solar energy is energy that comes from the heat from the sun.
Wind energy is the energy that is generated from the wind.
Geothermal energy energy is the energy that comes from the heat from the earth.

Solar, wind, and geothermal energy sources are all renewable. They derive their energy from natural processes that replenish themselves over time.

What is true for solar, wind, and geothermal energy?

There are a few things that are true about solar, wind, and geothermal energy.

Renewable energy sources include solar, wind, and geothermal power. They get their energy from natural processes that grow back eventually. Solar energy comes from the sun, wind energy comes from the movement of air, and geothermal energy comes from heat inside the Earth.

They are all environmentally friendly which means that it doesn't harm the environment. Solar, wind, and geothermal energy sources are better for the environment than fossil fuels. They release very little greenhouse gases when they are being used, which helps to prevent climate change and make the air cleaner.

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According to Faraday's law, voltage cannot be changed by changing the magnetic field strength.

Answers

The statement ‘According to Faraday's law, voltage cannot be changed by changing the magnetic field strength’ is false. No matter how the change is created, voltage will always be produced and it could be the magnetic field strength, moving magnet toward or away from the coil etc. This is because the voltage is directly proportional to the number of turns and the magnetic flux.

At the local grocery store, you push a 14.5-kg shopping cart. You stop for a moment to add a bag of dog food to your cart. With a force of 12.0 N you now accelerate the cart from rest through a distance of 2.29 m in 3.00 s. What was the mass of the dog food?

Answers

Answer:

The mass of the dog food added is 9.03 kg

Explanation:

Given;

mass of the shopping cart, m₁ = 14.5 kg

let the mass of the bag added = m₂

the force applied, F = 12 N

initial velocity of the cart-bag system, u = 0

distance traveled by the system, d = 2.29 m

time of motion of the system, t = 3.0 s

The acceleration of the system is calculated as;

$d = ut + (1)/(2) at^2\n\n2.29 = 0 + ((1)/(2) * 3^2)a\n\n2.29 = 4.5 a\n\na = (2.29)/(4.5) \n\na = 0.51 \ m/s^2$

The total mass of the system (M) is calculated as follows;

F = Ma

M = F/a

M = (12)/(0.51)

M = 23.53 kg

The mass of the dog food added is calculated as;

m₂ = M - m₁

m₂ = 23.53 kg - 14.5 kg

m₂ = 9.03 kg

Recall that the height of an object t seconds after it begins moving when gravity is the only force acting on the object is given. h(t)=-16x^2 + v0t + h0. h(t) is given in feet. v0 = initial velocity of object in ft/sec. ho= initial height of object in feet. If the feather is dropped from the top of the bridge 90 feet above a river, how long does it take the feather to reach the water?

Answers

That's pretty easy, have a look :

$h(t)=−16x2=v0t+h0$
$v0=0 ft/sec$
$h0=90 ft$

The only thing you need to do is to find t and the problem is solved.

Answer:

Time taken, t = 2.37 seconds

Explanation:

It is given that,

Height of an object at time t is given by :

$h(t)=-16t^2+v_0t+h_0$