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3 years ago

Which statement is correct?

1 answer:

7 0

Out of the choices given, the statement about how light travels is "Light can travel in a vacuum, and it travels faster if the light source is moving."

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A student sets up an experiment to determine the inertial mass of a cart. The student has access to the following measurement eq

wlad13 [49]

Answer:

The correct answers are a and d

Explanation:

In this experiment it can be analyzed using Newton's second law

F = m a

m = F / m

The outside is supplied by the spring balance and is constant, therefore the acceleration of the system is also constant.

The acceleration can be found with the kinematic equations

x = v t + ½ a t²

As we start from rest the initial speed is zero

a = 2 x / t²

Therefore we need the reading of position and time.

Finally, the relationship between the balance reading and this acceleration of the mass of the system

Let's analyze the answers

a) True. It is one of the necessary quantities

b) False. With the equipment we cannot measure the speed directly

c) false. Acceleration is calculated

d) true. It is the other magnitude necessary for the calculation.

The correct answers are a and d

7 0

4 years ago

Read 2 more answers

For the system of Problem3.18, determine the amount of energy transfer by heat, in kJ per kg of refrigerant.[Problem3.18A closed

Scrat [10]

Answer:

35.625° C

Explanation:

See attachment

a) Final temperature is 35.625° C

b) 0°

6 0

3 years ago

4 examplels of chemical change?

kiruha [24]

Answer:

Burning of paper and log of wood.

Digestion of food.

Boiling an egg.

Chemical battery usage.

Electroplating a metal.

Baking a cake.

Milk going sour.

i did some extra for you

6 0

3 years ago

Read 2 more answers

Um I don't remember how to do this, help :(

Eddi Din [679]

Pressure is a measure of force per unit area:

P = F/A

The water exerts a pressure of 202 kPa = 202,000 Pa on the diver, who has a surface area of 1.50 m². Then the force exerted by the water is F such that

F = PA

F = (202,000 Pa) (1.50 m²)

F = 303,000 N = 303 kN

4 0

3 years ago

Bailey walks to the pizza place for lunch. To get there, she walks 3 km East, then 8 km south, and then 3 Km East again

sveticcg [70]

Answer:

Total distance she cover = 14km

Magnitude of displacement = 10 km

Direction of her displacement is East-south

Explanation:

Given:

Distance travel (East) = 3 km

Distance travel to south = 8 km

Distance travel (East) = 3 km

Computation:

Total distance she cover = 3km+8km+3km

Total distance she cover = 14km

Magnitude of displacement = $\sqrt{(3+3)^2+(8)^2}\\$

Magnitude of displacement = 10 km

Direction of her displacement is East-south

8 0

4 years ago