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LenKa [72]
2 years ago
7

To investigate seed growth in different levels of light, Jarrod covers seeds with soil in three different containers. He places

a pea seed in a short, wide plastic cup, a cucumber seed in tall, skinny glass, and a tomato seed in a shallow, plastic dish. He places the plastic cup in a window sill in direct sunlight, the glass outside in partially shaded area, and the dish in his closet in the dark. He will leave the containers in those places for one week, and record the growth at the end of his investigation. How could Jarrod's investigation be adapted to create a fair test
Physics
2 answers:
mr_godi [17]2 years ago
6 0
Jarrod could have the same types of seeds because different seedgrow at different rates. He could also use the same type of dish.
s
Alisiya [41]2 years ago
5 0

To make his investigation a fair test, he should test the same type of seed in the same type and size cup. By making all other parts of his investigation the same, he can study one variable.

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A black widow spider hangs motionless from a web that extends vertically from the ceiling above. If the spider has a mass of 1.2
leva [86]

Answer:

Tension = 0.012 N

Explanation:

If the black widow spider is hanging vertically motionless from the ceiling above. Then, the weight of the spider must be balancing the tension in the spider web. Therefore,

Tension = Weight

Tension = mg

where,

m = mass of spider = 1.27 g = 0.00127 kg

g = acceleration due to gravity = 9.8 m/s²

Therefore,

Tension = (0.00127 kg)(9.8 m/s²)

<u>Tension = 0.012 N</u>

8 0
3 years ago
A huge rotating cloud of particles in space gravitate together to form an increasingly dense ball. As ir shrinks in size, the cl
Trava [24]

Answer:

rotates faster

Explanation:

A huge rotating cloud of particles in space gravitate together to form an increasingly dense ball As it shrinks in size, the cloud rotates faster. Because Angular momentum is conserved, so when it shrinks the moment of inertia decreases, then angular speed must increase. So it rotates fast.

4 0
3 years ago
A tennis ball is thrown from a 25 m tall building with a zero initial velocity. At the same moment, another ball is thrown from
Nataly [62]

Answer:

The two balls meet in 1.47 sec.

Explanation:

Given that,

Height = 25 m

Initial velocity of ball= 0

Initial velocity of another ball = 17 m/s

We need to calculate the ball

Using equation of motion

s=ut+\dfrac{1}{2}gt^2+h

Where, u = initial velocity

h = height

g = acceleration due to gravity

Put the value in the equation

For first ball

s_{1}=0-\dfrac{1}{2}gt^2+25....(I)

For second ball

s_{2}=17t-\dfrac{1}{2}gt^2+0....(II)

From equation (I) and (II)

-\dfrac{1}{2}gt^2+25=17t-\dfrac{1}{2}gt^2+0

t=\dfrac{25}{17}

t=1.47\ sec

Hence, The two balls meet in 1.47 sec.

6 0
3 years ago
Friction force affects the work done by the applied force.<br><br>T OR F ​
lakkis [162]

Answer:

TRUE.

Explanation:

YES IT EFFECTS.

IT MAY HELP YOU.

7 0
2 years ago
Read 2 more answers
The bending of a seismic waves as it crosses a boundary is called ___
Pavel [41]
<span>The correct answer is: C) refraction.

Hope this helps :)</span>
5 0
3 years ago
Read 2 more answers
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