In 3.0 seconds, a wave generator produces 15 pulses that spread over a distance of 45 centimeters. Calculate its period.0.022 s

0.066 s

0.20 s

0.33 s

Answers

Answer 1

Answer: Period = (time) / (number of pulses)

= (3 sec) / (15 pulses)

= 0.2 sec/pulse

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You use a 1200-watt hair dryer for 10 minutes each day. a. How many minutes do you use the hair dryer in a month? (Assume there are 30 days in the month.) b. How many hours do you use the hair dryer in a month? c. What is the power of the hair dryer in kilowatts? d. How many kilowatt-hours of electricity does the hair dryer use in a month? e. If your town charges $0.15/kWh, what is the cost to use the hair dryer for a month?

When the body is in water, how many times faster does it lose heat than when it is in still air? A) 2 B) 10 C) 100 D) 25

Answers

Answer:D)25

Explanation:

I got it right

A clever engineer designs a "sprong" that obeys the force law fx =−q(x−xe)3, where xe is the equilibrium position of the end of the sprong and q is the sprong constant. for simplicity, we'll let xe =0m. then fx =−qx3.

Answers

The unit of q is N/m³.While the potential energy of the compressed spring will be $\rm U(x)= -(qx^4)/(4)$ .

What is the potential energy of spring?

When a springdeviates from its mean position, it attempts to regain equilibrium by applying a force that is equivalent to but opposite to the external force.

Spring force has been used in bicycle carriers and launchingmechanisms, where the energy generated by disrupting the spring'sbalance is used as potential energy.

The given equation for the force law is;

$\rm f_x =-q(x-x_e)$

Where,

$\rm x_e$ is equilibrium position of the end of the spring

q is a spring constant

If at equilibriumposition;

$\rm x_e=0$

$\rm F_X= -qx^3 \n\n \rm q = (F_x)/(x^3) \n\n$

So the unit derived will be;

q = N/m³

The potential energy of the spring is found by;

$\rm F_x=- (du)/(dx) \n\n U(x)= -\int\limits^x_0 {F(x)} \, dx \n\n U(x)= -\int\limits^x_0 -qx^3 \, dx \n\n U(x)=- (qx^4)/(4)$

Hence the unit of q is N/m³.While the potentialenergy of the compressed spring will be $\rm U(x)= -(qx^4)/(4)$ .

To learn more about the potential energy of spring refer to the link;

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The objective of this question is to compute the units of q and calculate the expression for the P.E of the compressed spring

Answer:

q = N/m³

$\mathbf{U(x) = -(qx^4)/(4)}$

Explanation:

Given that:

The equation for the force law is:

$F_x = -q (x -x_e)^3$

where;

$x_e$ e = equilibrium position of the end of the spring

i.e. $x_e$ = 0

q = is the spring constant

Also;

$F_x = -qx^3$

From above the units of q can be calculated by making q the subject of the formula :

$q = (F_x)/(x^3)$

where x is in meters and F is in Netwon;

Then :

q = N/m³

The Potential energy P.E of the compressed spring can be calculated by using the integral:

$F_x = -(dU)/(dx)$

$U(x) = - \int F_x dx$

$U(x) = - \int ^x_0 (-qx^3) \ dx$

$\mathbf{U(x) = -(qx^4)/(4)}$

now lets look at a skydiver who jumps out of a plane that has a forward velocity of 40 m/s. ignore air resistance. After 1 second, what is the skydivers forward velocity?

Answers

If there's no air resistance, then there's nothing that has any effect on his forward
velocity. It's still 40 m/s forward, and it WILL be until he hits the ground.

Two balls of equal mass collide. One of them experiences an acceleration of 12m/s 2 at one moment.What acceleration does the other ball experience at the same time?

Answers

Answer:

12m/s²

Explanation:

Two balls with equal masses and speed engage in a head-on elastic collision. Since the balls of equal mass are moving at equal and opposite speeds, the total linear momentum of the system is zero.

Therefore, the second ball experience an acceleration of 12m/s² at the same time.

Final answer:

Due to the law of conservation of momentum, two balls of equal mass colliding will experience equal but opposite accelerations at the simultaneous point of collision. In this case, if one ball experiences an acceleration of 12m/s^2, the other will experience -12m/s^2.

Explanation:

In the field of physics, this scenario falls under the law of conservation of momentum. According to this law, the total momentum before and after the collision remains the same. If two balls of equal mass collide, and one experiences an acceleration of 12 m/s2, the other ball will experience an equal but opposite acceleration, so -12 m/s2. Please keep in mind, that this is a simplification and real-life situations might be more complex due to factors like friction, air resistance and the angle of collision.

Learn more about Conservation of Momentum here:

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The largest diversity of plants and animals on the planet is found in one terrestrial biome. True or false

Answers

The largest diversity of plants and animals on the planet is found in one terrestrial biome. It is a true statement.

What is terrestrial biome?

Large-scale habitats known as biomes can be identified by their distinctive temperature ranges and precipitation rates. The kinds of vegetation and animal life that can exist in those locations are influenced by these two factors. The same biome can exist in physically separate regions with similar climates because each biome is characterized by climate.

There are eight main terrestrial biomes: temperate grasslands, temperate forests, boreal forests, Arctic tundra, and tropical rainforests, savannas, subtropical deserts, and chaparral.

All this terrestrial biomes has large diversity of plants and animals on the planet .

Learn more about terrestrial biome here:

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That statement is true.

The largest diversity of plants and animals on the planet is found in the tropical rain forest.

Geologists cannot yet predict earthquakes because

Answers

Geologists cannot yet predict earthquakes because the earthquakes caused by the movement of plates do not have the precise time and place when will it moves.

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