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2 years ago

Duane skis down a hill at an angle of 42°. He has a mass of 92 kg. What is the normal force on Duane?

Physics

2 answers:

Sindrei [870]2 years ago

7 0

Normal force=m*g*cos theta
normal force=92kg*9.8m/s^2*cos 42
normal force=670 N

mariarad [96]2 years ago

3 0

Answer:

670 N

Explanation:

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An example of potential energy is a ball sitting _____ of the stairs.

expeople1 [14]

Answer:

at the top

Explanation:

Potential energy is the stored energy, mechanical energy,

or energy possessed by by virtue of the position of an object.an example of potential energy is the energy that a ball possesses by virtue of its sitting at the top of the stairs it being about to roll down the stairs.

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2 years ago

List some reasons why growth characteristics are more useful on agar plates than on agar slants

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Digital bits on a 12.0-cm diameter audio CD are encoded along an outward spiraling path that starts at radius R1=2.5cm and finis

BabaBlast [244]

Answer:

total length of the spiral is L is 5378.01 m

Explanation:

Given data:

Inner radius R1=2.5 cm

and outer radius R2= 5.8 cm.

the width of spiral winding is (d) =1.6 \mu m = 1.6x 10^{-6} m

the total length of the spiral is L is given as

$= \frac{(Area\ of\ the\ spiraing\ portion\ on\ the\ disk)}{d}$

$=\frac{\pi *(R_2)^2 - \pi*(R_1)^2}{d}$

$=\frac{\pi *(0.058)^2 - \pi*(0.025)^2}{1.6*10^{-6}}$

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2 years ago

A climatograph for a tropical grassland or savanna would look different from the climatograph shown for a temperate grassland. D

Savatey [412]

Answer:

Savannas have a fairly constant temperature all year; temperate grasslands have a greater seasonal temperature variation.

Explanation:

For example, the African Savanna has an almost constant temperature all year (see the first figure below).

The difference between summer and winter temperatures is only about 5 °C, and the rate of temperature change is quite slow.

The temperature of a temperate grassland (see the second figure below) has a much greater seasonal variation.

The summers are hot, and the winters are cold. The difference between summer and winter temperatures is about 30 °C, with a rapid rate of temperature change from one season to the next.

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2 years ago

Two people are talking at a distance of 3.0 m from where you are and you measure the sound intensity as 1.1 × 10-7 W/m2. Another

ioda

Answer:

$6.1875\times 10^{-8}$

Explanation:

Assuming uniform spread of sound with no significant reflections or absorption. We know that sound intensity varies $I=\frac {k}{r^{2}}$ where r is the distance

Since intensity is given then when at 3 m

$1.1\times 10^{-7}= \frac {k}{3^{2}}$

$k=3^{2}\times 1.1\times 10^{-7}= 9.9\times 10^{-7}$

Since we have the constant then at 4m

Intensity, $I= \frac {9.9\times 10^{-7}}{4^{2}}=6.1875\times 10^{-8}$

8 0

2 years ago