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3 years ago

Which of the following is a true statement?

Physics

1 answer:

pishuonlain [190]3 years ago

7 0

I think the answer is A.........

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A sine wave with maximum amplitude after 1/4 cycle

frosja888 [35]

Yeah what do you want me to answer for this question?

4 0

4 years ago

The force of gravity acting<br> on a child's mass on earth is 490 newtons. what's the child's mass?

UNO [17]

F = m • a

What we know:
- Gravity: 9.8 m/s
- Force: 490 N

Equation derived:
m = F/a
m = 490/9.8
= 50 kg

6 0

3 years ago

Read 2 more answers

Light from a laser (lambda= 406.192 nm) is used to illuminate two narrow slits. The interference pattern is observed on a screen

dsp73

Answer:

The spacing between the slits is $d = 0.00145m$

Explanation:

From the question we are told that

The wavelength of the light is $\lambda = 406.192nm = 406.192*10^{-9} m$

The distance of the slit from the screen is $D = 5.937 \ m$

The number of bright fringe is $n = 24$

The length the fringes span is $L = 39.835 mm = \frac{39.835 }{1000} = 0.0398 m$

The fringe width (i.e the distance of between two successive bright or dark fringe) is mathematically represented as

$\beta = \frac{\lambda D}{d}$

Where d is the distance between the slits

$\beta$ is the fringe width which can also be evaluated as

$\beta = \frac{L}{n}$

Substituting values

$\beta = \frac{0.0398}{24}$

$\beta = 1.660 *10^{-3}$

Making d the subject of formula in the above equation

$d = \frac{\lambda D}{\beta }$

Substituting values

$d = \frac{406.192 *10^{-9} * 5.937 }{1.660 *10^{-3}}$

$d = 0.00145m$

4 0

4 years ago

When pushed with the same amount of force a ross a desk which toy car would most likely travel the fastest A car weighing 25 gra

Arada [10]

Answer:

A car weighing 15 grams

Explanation:

According to the equation that shows the relationship between mass (m), force (F), and acceleration (a) i.e. F = ma, it can be seen that with a constant force, the mass is inversely proportional to the acceleration.

This means that an increase in mass of an object denotes a decrease in acceleration of that object and vice versa. Hence, according to this question, when pushed with the same amount of force, a car with the least mass will move faster. This car is the car weighing 15grams.

3 0

3 years ago

At one instant, an object moving downward in free fall on the Earth has a speed of 50 m/s. Its speed 1 second later is

maksim [4K]

Answer:

velocity 1 second later = 59.8 m/s

Explanation:

Velocity final = Velocity initial + acceleration • time

Velocity final = 50m/s + 9.8m/s/s • 1s

Velocity final = 59.8 m/s

4 0

2 years ago