PHYSICS HIGH SCHOOL

What receives radio waves from space objects such as quasars?a. GPS equipment
b. Landsat satellites
c. VLBI equipment
d. navigation satellites

Answers

Answer 1
Answer: A VLBI system detects radio waves from space objects such as quasars.

"VLBI" stands for "Very Long Baseline Interferometry".  The idea
is that the signal is picked up by two receivers, separated by some
distance.  The tiny difference in the time the signal shows up at the
two places is used for a very precise calculation of the direction it's
coming from.

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Parallel light waves hit the surface of a still lake and reflect in the same direction. Which interaction of light and matter does this illustrate?

Answers

Parallel light waves hit the surface of a still lake and reflect in the same direction and the interaction of light and matter that it illustrates is called regular reflection. Regular reflection occurs whenever the reflecting surface is very smooth. The surface of the still lake is smooth. I hope the answer helps you.

Answer:

regular reflection

Explanation:

Gradpoint

Why do objects move at constant speed

Answers

Most objects move at a constant speed because of friction and acceleration. The constant speed keeps them in place, and keeps a balance. 

Typically, water runs through the baseboard copper tubing and, therefore, fresh hot water is constantly running through the piping. However, consider a pipe where water was allowed to sit in the pipe. The hot water cools as it sits in the pipe. What is the temprature change, (ΔT), of the water if 193.0 g of water sat in the copper pipe from part A, releasing 2665 J of energy to the pipe? The specific heat of water is 4.184 (J/g)⋅∘C.

Answers

Answer: The temperature of the water falls by 3.3°C

Explanation:

The heat change is related to the change in temperature by the equation

dH = m Cp dT

In this example, -2665 J = 193 g x 4.184 J/g°C x dT

so dT = -3.3 °C

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Answers

The most important reason to control the conditions of an experiment is to make sure that the environment is affecting the results of the experiment--which would void the study. 

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Answers

The vacuum layer will prevent heat losses due to conduction and convection completely as it will provide no medium for these phenomena.

Answer:

insulator

Explanation:

Can a vector be shorter than one of its components

Answers

It can never be shorter than a component - magnitude of avector is the square root of the sum of the components squared, and a square function never produces a negative number. However, it can be the same size as its component, if that component is the only one
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